Thuto ka Teko ea Pilot ea Tlhahiso ea PVC Resin ho tloha Hydroxypropyl Methyl Cellulose

Ts'ebetso ea tlhahiso ea HPMC ea malapeng e ile ea hlahisoa, 'me karolo e ka sehloohong ea HPMC ea malapeng molemong oa tlhahiso ea PVC le tšusumetso ea eona ho boleng ba resin ea PVC e ile ea ithutoa tekong ea lifofane. Liphetho li bontša hore:①Ts'ebetso ea HPMC ea malapeng e ntle haholo, 'me ts'ebetso ea resin ea PVC e hlahisoang e lekana le boleng ba PVC resin e hlahisoang ke lihlahisoa tsa HPMC tse tsoang linaheng tse ling;②Ha HPMC ea malapeng e sebelisoa tlhahiso ea PVC, PVC e ka ntlafatsoa le ho lokisoa hantle ka ho fetola mofuta le palo ea HPMC Ts'ebetso ea lihlahisoa tsa resin;③HPMC ea lapeng e loketse tlhahiso ea li-resin tse fapaneng tsa PVC tse hlephileng. Likaroloana tsa resin tsa PVC tse hlahisoang li na le filimi e tšesaane le leseli le khomarelang ketlele;④Lihlahisoa tsa HPMC tsa lapeng li ka nka sebaka sa lihlahisoa tsa HPMC tse tsoang kantle ho naha.

Mantsoe a bohlokoa:PVC; dispersant; hydroxypropyl methylcellulose

Tlhahiso ea HPMC e nang le k'hothone e hloekisitsoeng linaheng tse ling e qalile ka 1960, 'me naha ea heso e ile ea qala ho hlahisa HPMC mathoasong a 1970. Ka lebaka la lithibelo tsa lisebelisoa, theknoloji le lintlha tse ling, boleng bo ne bo ke ke ba tsitsa, 'me ponahalo e ne e le fibrous. Ka lebaka lena, HPMC e hlokoang ke indasteri ea resin ea PVC, indasteri ea meriana, thepa ea mohaho oa boemo bo phahameng, litlolo, tšepe, lijo le liindasteri tse ling kaofela li itšetlehile ka thepa e tsoang linaheng tse ling, haholo-holo e tsoang United States le Japane, 'me HPMC e tlas'a taolo ea linaha tse ling. . Ka 1990, Lekala la Indasteri ea Lik'hemik'hale le ile la hlophisa likarolo tse amehang ho sebetsana le mathata a bohlokoa ka kopanelo, 'me la hlahisa lihlahisoa tse fihlelang litlhoko tsa boleng ba indasteri tsa PVC, ka ho hlokomela ho fumaneha ha HPMC. Lilemong tsa morao tjena, baetsi ba HPMC ba hloahloa ba malapeng ba thehile mohopolo oa nts'etsopele ea boqapi, khokahano, botala, ho buleha le ho arolelana, ba tsitlallela ho nts'etsopele e khannoang ke boqapi, 'me ba atlehile ho fihlela nts'etsopele ea boleng bo holimo ka boqapi bo ikemetseng, nts'etsopele ea mahlale, le phetoho e potlakileng. matla a khale le a macha a kinetic. E hlahisitsoe ke China Petroleum and Chemical Industry Federation, GB/T 34263-2017 "Hydroxypropyl Methyl Fiber bakeng sa Tšebeliso ea Liindasteri", e neng e khethiloe ke Komiti ea Tekheniki ea Tekanyetso ea Lik'hemik'hale ea China 'me ea amoheloa ke setsi sa ho ngola, e phatlalalitsoe ka 2017,' me e e lokollotsoe naha ka bophara ka la 1 Mmesa, 2018. e kenngoe tšebetsong ka molao. Ho tloha ka nako eo, ho na le litekanyetso tsa hore likhoebo tsa PVC li reke le ho sebelisa lihlahisoa tsa HPMC.

1. Boleng bo hloekisitsoeng ba k'hothone

30 # k'hothone e hloekisitsoeng e ka sebopeho sa likhoele tse ntle ka tlas'a microscope. Fiber e holileng ea k'hothone e na le likhoele tse makholo tse khabisitsoeng ka kristale karolong ea eona ea sefapano, 'me likhoele tsa mantlha li kopantsoe ka makholo a likhoele tse ngata. Li-bundles tsena tsa fibril Fibril Fibre ea k'hothone e kopantsoe ka mokhoa o makatsang ka likarolo tse bohareng. Sena se thusa ho thehoeng ha alkalized cellulose le ho tšoana ha tekanyo ea etherification, 'me ho thusa ho ntlafatsa bokhoni ba ho boloka sekhomaretsi ba HPMC nakong ea polymerization ea PVC.

30 # k'hothone e hloekisitsoeng e sebelisa li-linters tsa k'hothone tse nang le khōlo e phahameng le tekanyo e tlaase ea polymerization e le lisebelisoa tse tala, ts'ebetso ea tlhahiso e rarahane, e hloka ho hloekisoa, 'me litšenyehelo tsa tlhahiso li phahame. 1000 # k'hothone e hloekisitsoeng e sebelisa li-linter tsa k'hothone tse nang le khōlo e phahameng le tekanyo e phahameng ea polymerization e le lisebelisoa tse tala, ts'ebetso ea tlhahiso ha e thata, 'me litšenyehelo tsa tlhahiso li tlaase. Ka hona, k'hothone e hloekisitsoeng ea 30 # e sebelisetsoa ho hlahisa lihlahisoa tse phahameng tse kang PVC resin / moriana / lijo, 'me 1000 # e hloekisitsoeng ea k'hothone e sebelisetsoa ho hlahisa thepa ea mohaho kapa masimo a mang a kopo.

2. Sebopeho, mohlala le mokhoa oa tlhahiso ea lihlahisoa tsa HPMC

2.1 Thepa ea lihlahisoa tsa HPMC

HPMCke phofshoana e se nang chefo, e sa nkhang hamonate, e sa latsoeheng e tšoeu kapa e bosoeu bo bosoeu kapa phofo e granular e entsoeng ka k'hothone e hloekisitsoeng ea tlhaho e le eona ntho e ka sehloohong e tala. Ke motsoako oa semi-synthetic, o sa sebetseng, oa viscoelastic, metsoako ea mofuta o seng oa ionic. Litlaleho tsa Machaena ke hydroxymethyl propyl cellulose, cellulose hydroxypropyl methyl ether, le hypromellose, 'me foromo ea molek'hule ke [C6H7O2(OH)2COOR]n.

Sebaka se qhibilihang sa HPMC ke 225-230°C, boima ba 'mele ke 1.26-1.31 g/cm³, boima ba molek'hule bo ka bang 22,000, mocheso oa carbonization ke 280-300°C, 'me tsitsipano ea holim'a metsi ke 42-56 mN / m (2% tharollo ea metsi).

Thepa ea 'mele le ea lik'hemik'hale ea HPMC e kenyelletsa haholo lintlha tse latelang.

(1) Index ea boholo ba likaroloana: Lenane la boholo ba likaroloana tsa HPMC bakeng sa resin ea PVC e na le litlhoko tse phahameng. Sekhahla sa ho feta ke 150μm e kholo ho feta 98.5%, mme sekhahla sa ho pasa ke 187μm ke 100%. Tlhokahalo e akaretsang ea litlhaloso tse khethehileng e pakeng tsa 250 le 425μm.

(2) Solubility: Ho qhibiliha ka har'a lihlapolli tse ling joalo ka metsi le lino tse tahang, ho qhibiliha ka metsing 'me ho na le tšebetso ea bokaholimo. Ponaletso e phahameng, ts'ebetso e tsitsitseng ea tharollo, litlhaloso tse fapaneng tsa lihlahisoa li na le mocheso o fapaneng oa li-gel, liphetoho tsa solubility ka viscosity, ho theola viscosity, ho qhibiliha ho hoholo, litlhaloso tse fapaneng tsa HPMC li na le phapang e itseng ts'ebetsong, 'me ho qhibiliha ha metsi ha ho joalo. angoa ke boleng ba pH.

Ho qhibiliha ha metsi a batang le metsi a chesang ho fapane. Lihlahisoa tse nang le methoxyl e phahameng ha li qhibilihe ka metsing a chesang ka holimo ho 85°C, lihlahisoa tse nang le methoxyl e mahareng ha li qhibilihe ka metsing a chesang ka holimo ho 65°C, le lihlahisoa tse nang le methoxyl e tlase ha li qhibilihe metsing a chesang a ka holimo ho 65°C. Metsi a chesang ka holimo ho 60°C. Tloaelehileng HPMC ha e qhibilihe ka har'a metsoako ea tlhaho e kang ethanol, ether, le chloroform, empa e qhibiliha ka motsoako oa 10% ho isa ho 80% oa ethanol aqueous solution kapa motsoako oa methanol le dichloromethane. HPMC e na le hygroscopicity e itseng. Ka 25°C / 80% RH, ho monya mongobo o lekanang ke 13%, 'me o tsitsitse haholo sebakeng se omeletseng le pH ea boleng ba 3.0-11.0.

(3) HPMC e na le litšobotsi tse babatsehang tsa ho qhibiliha metsing a batang empa e sa qhibilihe ka metsing a chesang. Ho kenya HPMC metsing a batang le ho e sisinya ho ka qhibiliha ka ho feletseng 'me ea fetoha mokelikeli o bonaletsang. Lihlahisoa tse ling tsa brand ha li khone ho qhibiliha metsing a chesang a ka holimo ho 60°C, mme e ka ruruha feela. Thepa ena e ka sebelisoa bakeng sa ho hlatsoa le ho hloekisa, e ka fokotsang litšenyehelo, ea fokotsa tšilafalo, le ho eketsa polokeho ea tlhahiso. Ka ho fokotseha ha lintho tsa methoxyl, ntlha ea gel ea HPMC e ile ea eketseha, ho qhibiliha ha metsi ho fokotseha, 'me mosebetsi oa bokaholimo le oona oa fokotseha.

(4) HPMC e sebelisoa e le ho fanyeha stabilizer le dispersant ka polymerization ea vinyl chloride le vinylidene. E ka sebelisoa hammoho le polyvinyl alcohol (PVA) kapa e ikemetseng, 'me e khona ho laola sebopeho sa likaroloana le kabo ea likaroloana.

(5) HPMC e boetse e na le khanyetso e matla ea enzyme, thepa ea gel ea mocheso (metsi a chesang ka holimo ho 60°C ha e qhibilihe, empa e ruruha feela), thepa e babatsehang ea ho etsa lifilimi, pH ea boleng bo tsitsitseng (3.0-11.0), Ho boloka metsi le litšobotsi tse ling tse ngata.

Ho ipapisitsoe le litšoaneleho tse ntle tse kaholimo, HPMC e sebelisoa haholo mafapheng a indasteri joalo ka bongaka, indasteri ea petrochemical, kaho, lirafshoa, masela, lijo, lik'hemik'hale tsa letsatsi le letsatsi, resin ea maiketsetso, ho roala le lisebelisoa tsa elektroniki.

2.2 HPMC mohlala oa sehlahisoa

Karolelano ea dikahare tsa methoxyl le hydroxypropyl lihlahisoa tsa HPMC li fapane, viscosity e fapane, 'me ts'ebetso ea sehlahisoa e fapane.

2.3 Ts'ebetso ea tlhahiso ea lihlahisoa tsa HPMC

HPMC e sebelisa selulose ea k'hothone e hloekisitsoeng e le thepa e tala e ka sehloohong, 'me e etsa phofo ea k'hothone ka ho senya phekolo. Beha phofo ea k'hothone ka ketleleng e otlolohileng ea polymerization, e qhalakane ka makhetlo a ka bang 10 ho solvent (toluene, isopropanol e le motsoako o tsoakiloeng), 'me u kenye ka tatellano Lye (soda ea caustic ea lijo-thollo e qhibiliha ka metsing a chesang pele), propylene oxide, methyl chloride etherification agent, etherification reaction e etsoa ka mocheso o itseng le khatello, 'me sehlahisoa sa karabelo se fokotsoa ka acid, tšepe e tlosoa, e hlatsuoa le ho omisoa,' me qetellong e fumana HPMC.

3. Kopo ea HPMC tlhahiso ea PVC

3.1 Molao-motheo oa ketso

Ts'ebeliso ea HPMC joalo ka mohatelli tlhahisong ea indasteri ea PVC e khethoa ke sebopeho sa eona sa limolek'hule. E ka bonoa ho tsoa ho sebopeho sa limolek'hule tsa HPMC hore sebopeho sa sebopeho sa HPMC se na le sehlopha se sebetsang sa hydrophilic hydroxypropyl (-OCH-CHOHCH3) le lipophilic methoxyl (-OCH,) sehlopha se sebetsang. Ka vinyl chloride suspension polymerization, dispersant e haholo-holo concentrated ka segokanyimmediamentsi sa sebolokigolo monomer droplet-metsi mohato, 'me a hlophisoa ka tsela eo karolo ea hydrophilic ea dispersant e fetela ho karolo ea metsi,' me karolo ea lipophilic e fetela ho monoma. lerothodi. Ho HPMC, karolo e thehiloeng ho hydroxypropyl ke karolo ea hydrophilic, e sebelisoang haholo-holo karolong ea metsi; karolo e thehiloeng methoxy ke karolo ea lipophilic, e ajoang haholo-holo karolong ea monomer. Palo ea karolo ea lipophilic e ajoang karolong ea monomer e ama boholo ba karolo e ka sehloohong, tekanyo ea ho bokellana, le porosity ea resin. Lintho tse phahameng tsa karolo ea lipophilic, li na le phello e matla ea tšireletso holim'a likaroloana tse ka sehloohong, e nyenyane tekanyo ea ho kopanya likaroloana tse ka sehloohong, le resin Porosity ea resin e eketseha 'me ho bonahala eka ho fokotseha hoa fokotseha; ho phahama ha lintho tsa karolo ea hydrophilic, ho fokola ha tšireletso ho likaroloana tse ka sehloohong, tekanyo e kholo ea ho bokellana ha likaroloana tse ka sehloohong, ho theola porosity ea resin, le ho phahama ha sekhahla se bonahalang. Ho phaella moo, phello ea tšireletso ea dispersant e matla haholo. Ka ho eketseha ha viscosity ea mokhoa oa ho itšoara ka polymerization, ka tekanyo e phahameng ea ho fetoha, ho kopana pakeng tsa likaroloana tsa resin ho tloaelehile ho etsahala, ho etsa hore sebopeho sa likaroloana se se ke sa tloaeleha; phello e sireletsang ea dispersant e fokola haholo, 'me likaroloana tse ka sehloohong Ho bonolo ho kopana sethaleng sa tekanyo e tlaase ea ho fetoha ha boemo ba pele ba polymerization, kahoo ho etsa resin e nang le sebopeho sa likaroloana tse sa tloaelehang.

Ho ipakile ka tloaelo hore ho eketsa HPMC le li-disperants tse ling ho polymerization ea vinyl chloride e emisitsoeng ho ka fokotsa tsitsipano ea sefahleho lipakeng tsa vinyl chloride le metsi qalong ea polymerization. Ho hasana ho tsitsitseng sebakeng sa metsi, phello ena e bitsoa bokhoni ba ho qhalakanngoa ba dispersant; ka lehlakoreng le leng, sehlopha se sebetsang sa lipophilic sa dispersant adsorbed holim'a vinyl chloride droplet e theha lera le sireletsang ho thibela ho bokellana ha lerotholi la vinyl chloride. Lerotholi le phetha karolo ea ho tsitsisa le ho sireletsa, e bitsoang bokhoni ba ho boloka colloid ea dispersant. Ke hore, tsamaisong ea ho emisa polymerization, dispersant e phetha karolo e 'meli ea ho qhalakanya le ho sireletsa botsitso ba colloidal.

3.2 Tlhahlobo ea ts'ebetso ea kopo

Resin ea PVC ke phofo e tiileng. Litšobotsi tsa eona tsa likaroloana (ho kenyeletsoa sebopeho sa eona sa likaroloana, boholo ba likaroloana le kabo, microstructure le boholo ba pore le kabo, joalo-joalo) li ama haholo ts'ebetso ea ts'ebetso ea polasetiki le ts'ebetso ea sehlahisoa, 'me e khetholla PVC. Ho na le lintlha tse peli tse nang le tšusumetso e kholo ho litšobotsi tsa likaroloana tsa resin:①Ho tsosoa ha tanka ea polymerization, lisebelisoa li batla li tsitsitse, 'me litšobotsi tse susumetsang ha li fetohe;②The dispersant system of the monomer in the polymerization process, ke hore, mokhoa oa ho khetha mofuta, grade le Dosage ke phetoho ea bohlokoa ka ho fetisisa e laolang thepa ea PVC resin pellets.

Ho tloha mochining oa granulation oa resin ts'ebetsong ea polymerization ea ho emisoa, hoa tsebahala hore ho eketsa dispersant pele karabelo e sebetsa haholo ho tsitsisa marotholi a oli a monoma a entsoeng ka ho susumetsa le ho thibela polymerization le ho kopanya marotholi a oli. Ka hona, phello ea ho hasana ea dispersant e tla ama thepa ea mantlha ea resin ea polymer.

Bokhoni ba ho boloka li-colloid tsa dispersant bo na le kamano e ntle le viscosity kapa boima ba molek'hule. Ha mokelikeli o nang le mokelikeli o moholo, o phahamisa boima ba limolek'hule, 'me matla a filimi e sireletsang e atolositsoeng holim'a sebopeho sa vinyl chloride-water phase, e fokotsa monyetla oa ho phatloha ha filimi le lijo-thollo.

Tharollo ea metsi ea dispersant e na le ts'ebetso e fapaneng ea sefahleho, e fokotsa tsitsipano ea holim'a metsi, ts'ebetso e phahameng ea holim'a metsi, marotholi a oli a monoma a ntlafala haholoanyane, ho fokotseha ho fokolang ho bonahalang ha likaroloana tsa resin e fumanoeng, le ho lokoloha le ho feta.

Ho netefalitsoe ka lipatlisiso tsa liteko hore tsitsipano ea sefahleho ea HPMC e batla e le nyane ho litharollo tsa metsi tse qhalaneng tsa gelatin, PVA, le HPMC ka nako e ts'oanang, ke hore, ha tsitsipano e nyane ea bokaholimo e ntse e phahama, e phahamisa ts'ebetso ea HPMC. the vinyl chloride suspension polymerization system, e bonts'ang hore The matla a ho qhalakanngoa bokhoni ba HPMC dispersant. Ha ho bapisoa le li-disperants tsa PVA tse mahareng le tse phahameng, boima bo tloaelehileng ba limolek'hule tsa HPMC (hoo e ka bang 22 000) bo nyane haholo ho feta ba PVA (hoo e ka bang 150 000), ke hore, ts'ebetso ea ho boloka sekhomaretsi ea li- dispersants tsa HPMC ha e ntle joalo. ea PVA.

Tlhahlobo e kaholimo ea theory le e sebetsang e bonts'a hore HPMC e ka sebelisoa ho hlahisa mefuta e fapaneng ea li-resin tsa PVC tse emisitsoeng. Ha e bapisoa le PVA e nang le tekanyo ea alcoholysis ea 80%, e na le bokhoni bo fokolang ba ho boloka sekhomaretsi le bokhoni bo matla ba ho hasana;.Ha ho bapisoa le 5% PVA, bokhoni ba ho boloka sekhomaretsi le bokhoni ba ho hasana lia lekana. HPMC e sebelisoa e le dispersant, 'me likaroloana tsa resin tse hlahisoang ke HPMC li na le "filimi" e fokolang, ho se tloaelehe ha likaroloana tsa resin, boholo bo botle ba likaroloana, ho monya ho hoholo ha li-plasticizers tsa resin,' me ha e le hantle ha li khomarele kettle, hobane ha li na thuso. -Chefo ebile e bonolo E hlahisa li-resin tsa boemo ba bongaka tse hlakileng haholo.

Ho latela tlhahlobo e boletsoeng ka holimo ea theory le e sebetsang ea tlhahiso, HPMC le PVA, joalo ka li-dipersants tse ka sehloohong tsa polymerization ea ho emisoa, li ka fihlela litlhoko tsa boleng ba lihlahisoa tsa resin, empa ho thata haholo ho fihlela litlhoko tsa bokhoni ba ho boloka sekhomaretsi le ts'ebetso ea sefahleho ho polymerization. tlhahiso. Hobane tse peli li na le litšobotsi tsa tsona, e le hore li hlahise lihlahisoa tsa boleng bo phahameng ba resin, bahlahisi ba bangata ba sebelisa lisebelisoa tse nang le mekhoa e mengata e nang le bokhoni bo fapaneng ba ho boloka sekhomaretsi le mesebetsi e fapaneng, ke hore, PVA le HPMC composite dispersant systems, ho finyella phello ea ho ithuta ho e mong le e mong. tse ding.

3.3 Papiso ea boleng ea HPMC lapeng le kantle ho naha

Ts'ebetso ea tlhahlobo ea mocheso oa gel ke ho lokisa tharollo e nang le metsi a nang le karoloana e boima ea 0.15%, e kenyelle ka har'a tube ea colorimetric, kenya thermometer, butle-butle futhumatsa le ho hlohlelletsa ka bonolo, ha tharollo e bonahala e le milky white filamentous gel ke moeli o tlase oa mocheso oa gel, tsoela pele ho futhumatsa le ho hlohlelletsa , ha tharollo e fetoha ka ho feletseng e tšoeu ea milky ke moeli o ka holimo oa mocheso oa gel.

3.4 Boemo ba mefuta e fapaneng ea HPMC lapeng le kantle ho naha ka microscope

Lifoto tsa mefuta e fapaneng ea HPMC tlas'a microscope li ka bonoa:①E50 ea kantle ho naha le 60YT50 HPMC ka bobeli li hlahisa sebopeho se kopaneng tlas'a microscope, sebopeho sa molek'hule sa 60YT50HPMC sa lehae se kopane ebile se ts'oana, mme sebopeho sa limolek'hule tsa kantle ho naha E50 se qhalakantsoeng;②Boemo bo kopaneng ba lehae la 60YT50 HPMC Sebopeho se ka fokotsa tsitsipano lipakeng tsa vinyl chloride le metsi, 'me se thusa vinyl chloride ho hasana ka mokhoa o ts'oanang le ho tsitsisa metsing, ke hore, hobane hydroxypropyl content ea 60YT50 HPMC e phahame hanyane. e etsa hore e be hydrophilic haholoanyane, ha ES0 Ka lebaka la litaba tse phahameng tsa lihlopha tsa methoxyl, ka khopolo, e na le ts'ebetso e matla ea ho boloka rabara;③e thibela ho kopanngoa ha marotholi a vinyl chloride qalong ea ts'ebetso ea polymerization;④e thibela ho kopanngoa ha likaroloana tsa polymer bohareng le mekhahlelo ea morao-rao ea mokhoa oa polymerization. Sebopeho se kopaneng se ithuta haholo tlhophiso e kopaneng ea limolek'hule tsa cellulose (libaka tsa kristale le amorphous, boholo le sebopeho sa sele ea yuniti, mofuta oa ho paka liketane tsa limolek'hule ka har'a sele ea yuniti, boholo ba likristale, jj.), sebopeho sa sebopeho ( ketane ea limolek'hule le Orientation ea li-microcrystals), joalo-joalo, li thusa karabelong e felletseng ea k'hothone e hloekisitsoeng nakong ea etherification, le ho ntlafatsa boleng ba kahare le botsitso ba HPMC.

3.5 Boemo ba tharollo ea metsi a HPMC lapeng le kantle ho naha

HPMC ea lapeng le kantle ho naha e ne e lokiselitsoe tharollo ea metsi a 1%, 'me phetiso ea leseli ea 60YT50 HPMC ea lapeng e ne e le 93%, mme ea kantle ho naha E50 HPMC e ne e le 94%,' me ha e le hantle ho ne ho se na phapang pakeng tsa phetiso ea leseli lipakeng tsa tse peli.

Lihlahisoa tsa HPMC tsa malapeng le tsa linaheng tse ling li entsoe ka tharollo ea metsi a 0.5%, 'me tharollo ka mor'a hore HPMC cellulose e qhibilihe e ile ea hlokomeloa. E ka bonoa ka mahlo a hlobotse hore ponaletso ea bobeli e ntle haholo, e hlakile ebile e pepenene, 'me ha ho na palo e kholo ea fiber e sa tsitsang, e bontšang hore boleng ba HPMC e tsoang linaheng tse ling le HPMC ea malapeng e molemo. Khanya e phahameng ea phetiso ea tharollo e bontša hore HPMC e sebetsa ka botlalo nakong ea alkalization le etherification, ntle le litšila tse ngata le likhoele tse sa tsitsang. Ntlha ea pele, e ka khetholla boleng ba HPMC habonolo. Mokelikeli o mosoeu le lipululana tsa moea.

4. HPMC dispersant kopo teko teko

E le ho netefatsa ka ho eketsehileng ts'ebetso ea ho hasana ha HPMC ea malapeng ts'ebetsong ea polymerization le tšusumetso ea eona ho boleng ba resin ea PVC, sehlopha sa R ​​& D sa Shandong Yiteng New Materials Co., Ltd. se sebelisitse lihlahisoa tsa HPMC tsa malapeng le tsa linaheng tse ling e le li-dispersants, le HPMC ea malapeng. le ho kenya PVA kantle ho naha joalo ka li- dispersants. Boleng ba li-resin tse lokiselitsoeng ke mefuta e fapaneng ea HPMC e le li-dispersants Chaena li ile tsa lekoa le ho bapisoa, 'me phello ea ts'ebeliso ea HPMC ho PVC resin e ile ea hlahlojoa le ho tšohloa.

4.1 Ts'ebetso ea teko ea pilot

Karabelo ea polymerization e entsoe ka ketlele ea 6 m3 polymerization. E le ho felisa tšusumetso ea boleng ba monoma boleng ba resin ea PVC, semela sa sefofane se sebelisitse mokhoa oa calcium carbide ho hlahisa vinyl chloride monomer, 'me metsi a monoma a ne a le ka tlase ho 50.×10-6. Ka mor'a hore vacuum ea ketlele ea polymerization e tšoanelehe, eketsa vinyl chloride e lekantsoeng le metsi a se nang ion ho ketlele ea polymerization ka tatellano, ebe u eketsa dispersant le li-additives tse ling tse hlokoang ke foromo ka ketlele ka nako e le 'ngoe ka mor'a ho bekha. Kamora ho hlohlelletsa metsotso e 15, metsi a chesang ka likhato tse 90°C e ile ea kenngoa ka har'a baki, e futhumetse mocheso oa polymerization ho qala karabelo ea polymerization, 'me metsi a pholileng a kenngoa ka har'a baki ka nako e le' ngoe, 'me mocheso oa mocheso o laoloa ke DCS. Ha khatello ea kettle ea polymerization e theohela ho 0.15 MPa, tekanyo ea phetoho ea polymerization e fihla ho 85% ho ea ho 90%, e eketsang terminator ho felisa karabelo, ho tsosolosa vinyl chloride, ho arola le ho omisa ho fumana resin ea PVC.

4.2 Teko ea Pilot ea 60YT50 ea malapeng le ea linaheng tse ling E50 HPMC tlhahiso ea resin

Ho tsoa ho data ea papiso ea boleng ba 60YT50 ea lehae le E50 HPMC kantle ho naha ho hlahisa resin ea PVC, ho ka bonoa hore ho monya viscosity le polasetiki ea 60YT50 HPMC PVC resin e ts'oana le ea lihlahisoa tse tšoanang tsa kantle ho naha tsa HPMC, tse nang le taba e tlase e sa fetoheng, e ntle. -ho lekana, Sekhahla se tšoanelehang ke 100%, 'me tse peli li haufi haholo ho latela boleng ba resin. Likahare tsa methoxyl tsa E50 tsa kantle ho naha li phahame hanyane ho feta tsa 60YT50 HPMC ea lapeng, mme ts'ebetso ea eona ea ho boloka rabara e matla. Resin ea PVC e fumanoeng e betere ho feta li-disperants tsa HPMC tsa malapeng mabapi le ho monya polasetiki le boima bo hlakileng.

4.3 HPMC ea lapeng 60YT50 le PVA e tsoang kantle ho naha e sebelisoang e le dispersant ho hlahisa tlhahlobo ea sefofane sa resin.

4.3.1 Boleng ba resin ea PVC e hlahisoang

Resin ea PVC e hlahisoa ke 60YT50 HPMC ea lapeng le dispersant ea PVA e tsoang kantle ho naha. Lintlha tsa papiso ea boleng li ka bonoa: ho sebelisa boleng bo ts'oanang ba 60YT50HPMC le sistimi e tsoang kantle ho naha ea PVA ho hlahisa resin ea PVC ka ho latellana, hobane ha ho nahanoa hore 60YTS0 HPMC dispersant e na le bokhoni bo matla ba ho hasana le ts'ebetso e ntle ea ho boloka rabara. Ha e ntle joalo ka sistimi ea phepelo ea PVA. Boima bo bonahalang ba resin ea PVC e hlahisoang ke 60YTS0 HPMC tsamaiso ea ho hasana e tlase hanyane ho feta ea dispersant ea PVA, ho monya polasetiki ho molemo, 'me boholo ba likaroloana tsa resin bo botle haholoanyane. Liphetho tsa liteko ha e le hantle li ka bonts'a litšobotsi tse fapaneng tsa 60YT50 HPMC le litsamaiso tse tsoang kantle ho naha tsa PVA, hape li bonts'a melemo le mefokolo ea li-disperants tse peli ho tsoa ts'ebetsong ea resin ea PVC. Mabapi le microstructure, filimi e ka holimo ea HPMC dispersant resin Thin, resin e bonolo ho e etsa polasetiki nakong ea ts'ebetso.

4.3.2 Boemo ba filimi ea likaroloana tsa PVC tsa resin tlas'a microscope ea elektronike

Ho shebella microstructure ea likaroloana tsa resin, likaroloana tsa resin tse hlahisoang ke HPMC dispersant li na le "filimi" e nyenyane haholo ea "filimi" e nyenyane; likaroloana tsa resin tse hlahisoang ke PVA dispersant li na le "filimi" e teteaneng ea microscopic. Ho feta moo, bakeng sa baetsi ba li-resin tsa calcium carbide tse nang le litšila tse phahameng tsa vinyl chloride monomer litšila, e le ho netefatsa botsitso ba sistimi ea foromo, ba tlameha ho eketsa bongata ba dispersant, e leng se etsang hore ho be le keketseho ea bokaholimo ba likaroloana tsa resin. le botenya ba "filimi". Ts'ebetso e tlase ea ho sebetsa ka polasetiki ha e ntle.

4.4 Teko ea Pilot ea limaraka tse fapaneng tsa HPMC ho hlahisa resin ea PVC

4.4.1 Boleng ba resin ea PVC e hlahisoang

Ho sebelisa limaraka tse fapaneng tsa lapeng tsa HPMC (e nang le li-viscosities tse fapaneng le dikahare tsa hydroxypropyl) joalo ka dispersant e le 'ngoe, palo ea dispersant ke 0.060% ea vinyl chloride monomer, le ho emisoa ha polymerization ea vinyl chloride ho etsoa ka 56.5° C ho fumana Kakaretso ea boholo ba likaroloana, boima bo bonahalang, le ho monngoa ha polasetiki ea PVC.

Ho ka bonoa ho sena hore:①Ha ho bapisoa le 65YT50 HPMC dispersion system, 75YT100 e na le viscosity ea 65YT50 HPMC e ka tlase ho 75YT100HPMC, le content ea hydroxypropyl le eona e ka tlase ho 75YT100HPMC, ha methoxyl e phahame ho feta 75YT10HPMC. Ho ea ka tlhahlobo ea theoretical ea li-dispersants, viscosity le hydroxypropyl Ho fokotseha ha litaba tsa motheo ho tla lebisa ho fokotseha ha bokhoni ba ho qhalakanngoa ba HPMC, 'me keketseho ea methoxy content e tla khothalletsa ntlafatso ea bokhoni ba ho boloka sekhomaretsi sa dispersant, ke hore, sistimi ea phepelo ea 65YT50 HPMC e tla etsa hore boholo ba karoloana ea resin ea PVC e eketsehe (boholo ba likaroloana tse mahoashe), letsoalo le bonahalang lea eketseha mme ho monya polasetiki hoa eketseha;②Ha ho bapisoa le 60YT50 HPMC tsamaiso ea ho hasana, hydroxypropyl content ea 60YT50 HPMC e kholo ho feta ea 65YT50 HPMC, 'me methoxy content ea bobeli e haufi le ho feta. Ho ea ka khopolo ea dispersant, ho phahama ha hydroxypropyl content, matla a matla a ho qhalakanngoa a dispersant, kahoo matla a ho qhalakanngoa a 60YT50 HPMC a ntlafatsoa; ka nako e ts'oanang, lintho tse peli tsa methoxyl li haufi 'me litaba li phahame, matla a ho boloka sekhomaretsi a boetse a matlafala, Litsamaisong tsa 60YT50 HPMC le 65YT50 HPMC tsa boleng bo tšoanang, resin ea PVC e hlahisoang ke 60YT50HPMC ho feta 65YT50 HPMC Sistimi e tlameha ho ba le boholo bo boholo ba likaroloana tse nyane (boholo bo botle ba likaroloana) le boits'oaro bo tlase bo hlakileng, hobane litaba tsa methoxyl tsamaisong ea ho hasana li haufi le ( ts'ebetso ea ho boloka rabara), e bakang ho monya ho tšoanang ka polasetiki. Hape ke lona lebaka leo ka lona 60YT50 HPMC e sebelisoang ka kakaretso indastering ea resin ea PVC ha ho khethoa li-dispersants tse kopaneng tsa PVA le HPMC. Ehlile, hore na 65YT50 HPMC e sebelisoa ka mokhoa o utloahalang molemong oa sistimi ea phepelo e kopaneng le eona e lokela ho khethoa ho latela matšoao a khethehileng a boleng ba resin.

4.4.2 Particle morphology ea likaroloana tsa PVC resin tlas'a microscope

The particle morphology ea PVC resin e hlahisoang ke mefuta e 2 ea 60YT50 HPMC dispersants e fapaneng hydroxypropyl le methoxyl content tlas'a microscope e ka bonoa: ka ho eketseha ha hydroxypropyl le methoxyl content, bokhoni ba ho hasana ba HPMC, ho boloka Bokhoni ba sekhomaretsi boa ntlafatsoa. Ha ho bapisoa le 60YT50 HPMC (8.7% hydroxypropyl mass fraction, 28.5% methoxyl mass fraction), likaroloana tsa PVC tsa resin tse hlahisoang li tloaelehile, ha li na mohatla, 'me likaroloana li hlephile.

4.5 Phello ea litekanyetso tsa 60YT50 HPMC ho boleng ba resin ea PVC

Teko ea mofofisi e sebelisa 60YT50 HPMC e le dispersant e le 'ngoe e nang le karoloana e boima ea sehlopha sa methoxyl sa 28.5% le karolo e kholo ea sehlopha sa hydroxypropyl sa 8.5%. Karolelano ea boholo ba karoloana, boima bo bonahalang, le ho monngoa ha polasetiki ea PVC resin e fumanoeng ka ho emisa polymerization ea vinyl chloride ho 5.°C.

Hoa hlokomeleha hore ha palo ea dispersant e ntse e eketseha, botenya ba lera la dispersant le adsorbed holim'a marotholi le eketseha, e leng ho ntlafatsa ts'ebetso ea dispersant le bokhoni ba ho boloka sekhomaretsi sa dispersant, e leng se fellang ka ho fokotseha ha boholo ba karoloana ea PVC. resin le ho fokotseha sebakeng se ka holimo. Boima bo bonahalang bo ntse bo eketseha 'me ho kenngoa ha plasticizer hoa fokotseha.

5 Qetello

(1) Ts'ebetso ea ts'ebetso ea resin ea PVC e lokiselitsoeng ho tsoa lihlahisoa tsa lehae tsa HPMC e fihlile boemong ba lihlahisoa tse tšoanang tse tsoang kantle ho naha.

(2) Ha HPMC e sebelisoa e le dispersant e le 'ngoe, e ka boela ea hlahisa lihlahisoa tsa PVC tsa resin tse nang le matšoao a molemo.

(3) Ha ho bapisoa le PVA dispersant, HPMC le PVA dispersant, mefuta e 'meli ea li-additives e sebelisoa feela e le dispersant ho hlahisa resin,' me lipontšo tsa resin tse hlahisoang li na le melemo le melemo ea tsona. HPMC dispersant e na le ts'ebetso e phahameng ea holim'a metsi le ts'ebetso e matla ea lerotholi la oli ea monomer. E na le ts'ebetso e ts'oanang le PVA 72 .5% ea tekanyo ea alcoholysis e ts'oanang.

(4) Tlas'a maemo a tšoanang a boleng, limaraka tse fapaneng tsa HPMC li na le methoxyl le hydroxypropyl tse fapaneng, tse nang le lisebelisoa tse fapaneng tsa ho lokisa index ea boleng ba PVC resin. 60YT50 HPMC dispersant e na le ts'ebetso e ntle ea ho hasana ho feta 65YT50 HPMC ka lebaka la litaba tsa eona tse phahameng tsa hydroxypropyl; 65YT50 HPMC Ka lebaka la litaba tse phahameng tsa methoxy ea dispersant, ts'ebetso ea ho boloka rabara e matla ho feta ea 60YT50HPMC.

(5) Hangata ha ho etsoa resin ea PVC, palo ea 60YT50HPMC dispersant e sebelisoang e fapane, 'me phetoho ea boleng le ts'ebetso ea PVC resin e boetse e na le liphetoho tse hlakileng. Ha tekanyetso ea 60YT50 HPMC dispersant e eketseha, boholo ba karoloana ea resin ea PVC ea fokotseha, letsoalo le bonahalang lea eketseha, le polasetiki. Sekhahla sa ho monya ha moemeli se fokotseha, 'me ka tsela e fapaneng.

Ho phaella moo, ha e bapisoa le PVA dispersant, HPMC e sebelisetsoa ho hlahisa lihlahisoa tsa letoto la resin, e bontšang elasticity e kholo le botsitso ho li-parameter tse kang polymerization kettle mofuta, bophahamo ba modumo, e susumetsang, joalo-joalo, 'me e ka fokotsa ts'ebetso ea lisebelisoa tsa kettle leboteng le khomarela lerako. kettle, le ho fokotsa filimi ea resin holim'a botenya, resin e seng chefo, botsitso bo phahameng ba mocheso, ho ntlafatsa pepeneneng ea lihlahisoa tse sebetsang ka tlas'a metsi, joalo-joalo Ho phaella moo, HPMC ea malapeng e tla thusa baetsi ba PVC ho fokotsa litšenyehelo tsa tlhahiso, ho ntlafatsa tlhōlisano ea 'maraka le ho tlisa molemo. melemo ea moruo.