Kudzidza paPilot Muedzo weKugadzirwa kwePVC Resin kubva kuHydroxypropyl Methyl Cellulose

Maitiro ekugadzira emumba HPMC akaunzwa, uye basa guru remumba HPMC mukugadzirwa kwePVC uye simba rayo pamhando yePVC resin zvakadzidzwa muyedzo yekutyaira. Zvigumisiro zvinoratidza kuti:①Kuita kwemumba HPMC kwakanakisa, uye kuita kwePVC resin inogadzirwa kwakaenzana nemhando yePVC resin inogadzirwa kubva kunze kwenyika HPMC zvigadzirwa;②Kana HPMC yemumba ichishandiswa mukugadzirwa kwePVC, PVC inogona kuvandudzwa uye kunyatsogadziriswa nekugadzirisa mhando uye huwandu hweHPMC Kuitwa kwezvigadzirwa zve resin;③Domestic HPMC yakakodzera kugadzirwa kweakasiyana akasununguka PVC resin. Iyo PVC resin particles inogadzirwa ine yakaonda firimu uye chiedza chinonamira kune kettle;④Zvemukati HPMC zvigadzirwa zvinogona kutsiva kunze kwenyika HPMC zvigadzirwa.

Mazwi akakosha:PVC; dispersant; hydroxypropyl methylcellulose

Kugadzirwa kweHPMC nekotoni yakanatswa kune dzimwe nyika kwakatanga muna 1960, uye nyika yangu yakatanga kukudziridza HPMC mukutanga kwe1970. Pamusana pezvipingamupinyi zvemichina, teknolojia nezvimwe zvinhu, hutano hwaisagona kugadzikana, uye chitarisiko chaiva fibrous. Nechikonzero ichi, iyo HPMC inodiwa nePVC resin indasitiri, indasitiri yemishonga, zvivakwa zvekuvaka, zvizorwa, simbi, chikafu nemamwe maindasitiri anovimba nekutenga kunze kwenyika, kunyanya kubva kuUnited States neJapan, uye HPMC inotongwa nekunze kwenyika. . Muna 1990, Ministry of Chemical Indasitiri yakaronga mayuniti akakodzera kuti agadzirise matambudziko akakosha, uye akagadzira zvigadzirwa zvinosangana nemaindasitiri emhando yePVC, vachiziva kugariswa kweHPMC. Mumakore achangopfuura, vagadziri vakanakisa vepamba HPMC vakasimbisa yakasimba pfungwa yekuvandudza yekuvandudza, kuronga, girinhi, kuvhurika, uye kugovana, vakasimbirira pakuvandudza-inofambiswa nebudiriro, uye vakabudirira kubudirira kwemhando yepamusoro kuburikidza nekuzvimiririra hunyanzvi, kusimudzira kwesainzi, uye kukurumidza kutendeuka. chekare uye itsva kinetic simba. Yakakurudzirwa neChina Petroleum uye Chemical Industry Federation, iyo GB/T 34263-2017 "Hydroxypropyl Methyl Fiber yeIndasitiri Kushandisa", iyo yakasarudzwa neChina Chemical Standardization Technical Committee uye yakatenderwa nechikamu chekunyora, yakaziviswa muna 2017, uye iyo. yakabudiswa munyika yose musi waApril 1, 2018. yakaitwa zviri pamutemo. Kubva ipapo, kune zviyero zvePVC mabhizinesi kutenga nekushandisa HPMC zvigadzirwa.

1. Yakanatswa yekotoni quality

30# donje rakakwenenzverwa riri muchimiro chetambo dzakanaka pasi pemaikorosikopu. Fiber yekotoni yakakura ine mazana emafibers e-crystallized basic element fibers muchikamu chayo chemuchinjiko, uye iyo basic element fibers inounganidzwa kuita mazana emasumbu akasungwa. Aya mabundle efibril A donje faibha akamonererwa muzvikamu zvakadzika. Izvi zvinobatsira pakugadzirwa kwealkalized cellulose uye kufanana kwedhigirii reetherification, uye zvinobatsira mukuvandudza kugona kuchengetedza glue kweHPMC panguva yePVC polymerization.

30# donje rakacheneswa rinoshandisa machira edonje ane hukuru hwakakura uye yakaderera polymerization dhigirii seyakagadzirwa, maitiro ekugadzira akaomarara, anoda kucheneswa, uye mutengo wekugadzira wakakwira. 1000 # yakacheneswa donje inoshandisa machira edonje ane hukuru hwakakura uye yakakwira dhigirii yepolymerization seyakagadzirwa, maitiro ekugadzira haana kuoma, uye mutengo wekugadzira wakaderera. Naizvozvo, 30# yakanatswa donje inoshandiswa kugadzira zvigadzirwa zvepamusoro-soro sePVC resin/mushonga/chikafu, uye 1000# yakanatswa donje inoshandiswa kugadzira giredhi rezvivakwa zvekuvaka kana mamwe minda yekushandisa.

2. Chimiro, modhi uye maitiro ekugadzirwa kweHPMC zvigadzirwa

2.1 Zvivakwa zveHPMC zvigadzirwa

HPMCipfumbu isina muchetura, isinganhuhwi, isinganakidze chena kana isina-chena fibrous kana granular poda yakagadzirwa nedonje rakanatswa sedonje guru. Iyo semi-synthetic, isingashande, viscoelastic polymer, isiri-ionic mhando makomisheni. Iwo maChinese aliases hydroxymethyl propyl cellulose, cellulose hydroxypropyl methyl ether, uye hypromellose, uye molecular formula ndeye [C6H7O2 (OH) 2COOR] n.

Iyo yekunyungudika kweHPMC ndeye 225-230°C, kuwanda kuri 1.26-1.31 g/cm³, iyo yehukama molecular mass inenge 22,000, iyo carbonization tembiricha ndeye 280-300°C, uye tension yepamusoro ndeye 42-56 mN/m (2% aqueous solution).

Iwo emuviri nemakemikari zvimiro zveHPMC zvinonyanya zvinosanganisira zvinotevera mapoinzi.

(1) Particle size index: Iyo HPMC particle size index yePVC resin ine zvinodiwa zvakanyanya. Kupasa kwe150μm inopfuura 98.5%, uye chiyero chekupasa che187μm iri 100%. Izvo zvinodikanwa zveakakosha zvakatemwa zviri pakati pe250 ne425μm.

(2) Solubility: inonyungudika mune zvimwe zvinonyungudutsa zvakaita semvura nedoro, inonyungudika nemvura uye ine basa repamusoro. Kujeka kwepamusoro, kuita kwakadzikama kwemhinduro, zvirevo zvakasiyana zvezvigadzirwa zvine tembiricha dzakasiyana dzegel, solubility shanduko ine viscosity, yakadzikira viscosity, iyo yakanyanya kunyungudika, zvakasiyana siyana zveHPMC zvine mimwe misiyano mukuita, uye kunyungudika mumvura hakusi. kukanganiswa ne pH kukosha.

Solubility mumvura inotonhora uye inopisa mvura yakasiyana. Zvigadzirwa zvine yakakwira methoxyl zvemukati hazvinyungudika mumvura inopisa pamusoro pe85°C, zvigadzirwa zvine yepakati methoxyl zvemukati hazvinyunguke mumvura inopisa pamusoro pe65°C, uye zvigadzirwa zvine yakaderera methoxyl zvemukati hazvinyunguke mumvura inopisa pamusoro pe65°C. Mvura inopisa inopfuura makumi matanhatu°C. Ordinary HPMC hainyunguriki muzvinonyungudutsa zveorganic senge ethanol, ether, uye chloroform, asi inonyungudika mu10% kusvika 80% ethanol aqueous solution kana musanganiswa wemethanol uye dichloromethane. HPMC ine imwe hygroscopicity. Ku25°C/80% RH, kuenzana kwemwando i13%, uye yakanyatsogadzikana munzvimbo yakaoma uye pH kukosha kwe3.0-11.0.

(3) HPMC ine hunhu hwakanakisa hwekunyungudika mumvura inotonhora asi isinganyungudika mumvura inopisa. Kuisa HPMC mumvura inotonhora uye nekuikurudzira inogona kunyungudika zvachose uye kushanduka kuita mvura inoonekera. Zvimwe zvigadzirwa zvemhando hazvigone kunyungudika mumvura inopisa pamusoro pe60°C, uye inogona kuzvimba chete. Ichi chivakwa chinogona kushandiswa kugeza uye kuchenesa, izvo zvinogona kuderedza mutengo, kuderedza kusvibiswa, uye kuwedzera kuchengetedzwa kwekugadzira. Nekudzikira kwemethoxyl yemukati, iyo gel point yeHPMC yakawedzera, kunyungudika kwemvura kwakadzikira, uye chiitiko chepamusoro chakadzikira.

(4) HPMC inoshandiswa seyakamisa kudzikamisa uye inoparadzira mune polymerization yevinyl chloride uye vinylidene. Inogona kushandiswa pamwe chete ne polyvinyl doro (PVA) kana yakazvimirira, uye inogona kudzora chimiro chechidimbu uye kugovera kwechidimbu.

(5) HPMC zvakare ine yakasimba enzyme kuramba, yekupisa gel zvivakwa (mvura inopisa pamusoro pe60°C haina kunyungudika, asi inongozvimba), yakanakisa firimu-inogadzira zvinhu, pH kukosha kugadzikana (3.0-11.0), Kuchengetwa kwemvura uye mamwe akawanda maitiro.

Zvichienderana nehunhu hwakanaka huri pamusoro, HPMC inoshandiswa zvakanyanya mumaindasitiri akadai semushonga, petrochemical indasitiri, kuvaka, ceramics, machira, chikafu, makemikari ezuva nezuva, synthetic resin, coating uye zvemagetsi.

2.2 HPMC chigadzirwa modhi

Huyero yemethoxyl yemukati uye hydroxypropyl zvirimo muHPMC zvigadzirwa zvakasiyana, viscosity yakasiyana, uye kuita kwechigadzirwa kwakasiyana.

2.3 Kugadzira maitiro eHPMC zvigadzirwa

HPMC inoshandisa yakanatswa donje cellulose sechinhu chikuru mbishi, uye inoumba donje poda kuburikidza nekupwanya kurapwa. Isa hupfu hwedonje muketero yepolymerization, iparadzire kanenge ka10 kunyungudutsa (toluene, isopropanol semusanganiswa wakasanganiswa), uye wedzera munhevedzano Lye (chikafu-giredhi caustic soda inonyungudika mumvura inopisa kutanga), propylene oxide, methyl chloride etherification agent, etherification reaction inoitwa pane imwe tembiricha uye kudzvanywa, uye maitiro echigadzirwa anobviswa neasidhi, simbi inobviswa, yakagezwa uye yakaomeswa, uye pakupedzisira kuwana HPMC.

3. Kushandiswa kweHPMC mukugadzirwa kwePVC

3.1 Nheyo yechiito

Iko kushandiswa kweHPMC seanoparadzira muPVC kugadzirwa kwemaindasitiri kunotemerwa neyakaomesesa chimiro. Zvinogona kuonekwa kubva kune molecular structure yeHPMC kuti maitiro ekugadzirisa HPMC ane zvose hydrophilic hydroxypropyl (-OCH-CHOHCH3) inoshanda boka uye lipophilic methoxyl (-OCH,) inoshanda boka. Muvinyl chloride kumiswa kwepolymerization, iyo disperant inonyanya kunyura mukati meiyo interface layer ye monomer droplet-water phase, uye yakarongedzwa nenzira yekuti hydrophilic segment ye dispersant inosvika pachikamu chemvura, uye iyo lipophilic segment inoenda kune monomer. droplet. MuHPMC, hydroxypropyl-based segment is hydrophilic segment, iyo inonyanya kugoverwa muchikamu chemvura; iyo methoxy-based segment is lipophilic segment, iyo inonyanya kugoverwa muchikamu chemonomeri. Huwandu hwechikamu che lipophilic chakagoverwa muchikamu chemonomeri chinokanganisa saizi yekutanga, dhigirii rekuunganidza, uye porosity yeresin. Iyo yakakwirira yemukati weiyo lipophilic segment, iyo yakasimba iyo inodzivirira mhedzisiro pazvikamu zvekutanga, iyo diki dhigirii yekutanga particle aggregation, uye resin Iyo porosity ye resin inowedzera uye inooneka density inoderera; iyo yakakwirira yezvinyorwa zve hydrophilic segment, iyo isina simba yekudzivirira pazvikamu zvekutanga, iyo yakakura dhigirii yekuunganidza yezvikamu zvekutanga, yakaderera porosity ye resin, uye yakakwirira inooneka density. Mukuwedzera, iyo inodzivirira mhedzisiro ye dispersant yakanyanya kusimba. Nekuwedzera kweiyo viscosity yepolymerization reaction system, pamwero wepamusoro wekushandura, kubatana pakati pezvikamu zveresin kunowanzo kuitika, zvichiita kuti chimiro chechidimbu chisaite; iyo inodzivirira mhedzisiro ye dispersant yakanyanya kusimba, uye iyo yekutanga zvimedu Zviri nyore kubatanidza padanho rekuderera kweshanduko muchikamu chekutanga chepolymerization, nekudaro kugadzira resin ine irregular particle shape.

Zvakaratidzwa nekuita kuti kuwedzera HPMC uye zvimwe zvinoparadzira kune kumisa polymerization yevinyl chloride kunogona kuderedza kupindirana kwemukati pakati pevinyl chloride nemvura padanho rekutanga repolymerization. Kupararira kwakadzikama mumvura yemvura, mhedzisiro iyi inonzi kugona kwekuparadzira kweanoparadzira; kune rumwe rutivi, iyo lipophilic inoshanda boka re dispersant adsorbed pamusoro peiyo vinyl chloride droplet inoumba chidziviriro chekudzivirira kudzivirira kuunganidzwa kwevinyl chloride droplet. Iyo droplet inoita basa rekudzikamisa nekudzivirira, iyo inonzi iyo colloid kuchengetedza kugona kweanoparadzira. Ndiko kuti, mukumiswa kwepolymerization system, iyo inoparadzira inoita basa reviri rekuparadzira nekuchengetedza iyo colloidal kugadzikana.

3.2 Kuongororwa kwekuita kwekushandisa

PVC resin ihupfu hwakasimba. Hunhu hwayo hwechikamu (kusanganisira chimiro chayo chechidimbu, saizi uye kugovera, microstructure uye pore saizi uye kugovera, nezvimwewo) zvakanyanya kukanganisa mashandiro epurasitiki uye kuita kwechigadzirwa, uye kuona PVC. Pane zvinhu zviviri zvine simba guru pane hunhu hwe resin particles:①Iko kubvongodza tangi yepolymerization, midziyo yacho yakagadziriswa, uye hunhu hunosimudzira hauna kuchinjika;②Iyo dispersant system yemonomer mune polymerization process, ndiko kuti, nzira yekusarudza mhando, giredhi uye Dosage ndiyo inonyanya kukosha shanduko inodzora zvimiro zvePVC resin pellets.

Kubva pane resin granulation mashandiro mukumiswa kwepolymerization process, inozivikanwa kuti kuwedzera dispersant pamberi pekuita kunonyanya kushanda kudzikamisa madonhwe emafuta emonomeri anoumbwa nekukurudzira uye kudzivirira kuwirirana kwepolymerization uye kusanganisa madonhwe emafuta. Naizvozvo, iyo yekuparadzira mhedzisiro yeanoparadzira inokanganisa iwo makuru zvimiro zvepolymer resin.

Iko colloid kuchengetedza kugona kweanoparadzira ane hukama hwakanaka neiyo viscosity kana molecular uremu. Iyo yakakura viscosity yemushonga wemvura, kukwirisa huremu hwemamorekuru, uye kukwirisa kusimba kwefirimu rinodzivirira rakashambadzirwa pavinyl chloride-mvura yechikamu interface, isingatani kuputika kwefirimu uye kukora zviyo.

Mushonga wemvura wezvinoparadzanisa une kuita kwakabatana, kudiki kudzvinyirirwa kwepasi, kukwirisa basa repamusoro, madonhwe emafuta emonomeri akagadzirwa, madiki anooneka density yezvikamu zvakawanikwa resin, uye yakasununguka uye yakawanda porous.

Izvo zvakasimbiswa kuburikidza nekuyedza tsvakiridzo kuti kupindirana kwechimiro cheHPMC kudiki mune aqueous dispersant solutions yegelatin, PVA, uye HPMC panguva imwecheteyo, ndiko kuti, kudiki kushushikana kwepasi, kunowedzera basa repamusoro reHPMC mu. iyo vinyl chloride suspension polymerization system, iyo inoratidza kuti Iyo yakasimba yekuparadzira kugona kweHPMC inoparadzira. Zvichienzaniswa nepakati uye yakakwirira viscosity PVA dispersants, avhareji hama molecular huremu hweHPMC (anenge 22 000) idiki kwazvo pane iyo yePVA (inenge 150 000), ndiko kuti, dhizaini rekuchengetedza mashandiro eHPMC anoparadzira haana kunaka saizvozvi. zvePVA.

The pamusoro theoretical uye inoshanda ongororo inoratidza kuti HPMC inogona kushandiswa kugadzira akasiyana marudzi ekumisa PVC resins. Kuenzaniswa nePVA ine dhigirii redorolysis ye80%, ine isina kusimba glue rekuchengetedza kugona uye kwakasimba kupararira kugona;.Kuenzaniswa ne5% PVA, kugona kuchengetedza glue uye kugona kwekuparadzira zvakaenzana. HPMC inoshandiswa se dissperant, uye zvidimbu zve resin zvinogadzirwa neHPMC zvine zvishoma "firimu" zvemukati, kusarongeka kweresin zvimedu, saizi yakatsetseka, kunyura kwakanyanya kweresin kugadzira plasticizers, uye chaiko kushoma kune kettle, nekuti haina. -toxic uye nyore Inogadzira mishonga-giredhi resin nekujeka kwakanyanya.

Zvinoenderana nepamusoro dzidziso uye inoshanda yekugadzira ongororo, HPMC nePVA, seyakanyanya kupatsanura yekumisa polymerization, inogona kunyatso kuzadzisa zvinodiwa zvemhando yezvigadzirwa zve resin, asi zvakaoma kwazvo kuzadzisa zvinodiwa zvekunamira kwekugona kuchengetedza uye basa remukati mu polymerization. production. Nekuti vaviri vacho vane hunhu hwavo, kuti vagadzire zvigadzirwa zvemhando yepamusoro resin, vagadziri vazhinji vanoshandisa masisitimu anoumbwa ane akasiyana anonamira ekuchengetedza uye zviitiko zvemukati, kureva, PVA uye HPMC inoumbwa inoparadzira masisitimu, kuti vawane mhedzisiro yekudzidza kubva kune yega yega. zvimwe.

3.3 Kuenzaniswa kwemhando yeHPMC kumba nekune dzimwe nyika

Iyo tembiricha yekuyedza gel ndeyekugadzira mhinduro ine mvura ine chikamu chikuru che 0.15%, woiwedzera kune colorimetric chubhu, isa thermometer, zvishoma nezvishoma kupisa uye kurunga zvinyoro nyoro, kana mhinduro ichiita milky chena filamentous gel ndiyo yakaderera muganho we. iyo tembiricha yegel, ramba uchipisa uye kurunga, kana mhinduro yacho ichichinja zvachose mukaka chena ndiyo yekumusoro muganho wekushisa kwegel.

3.4 Mamiriro emhando dzakasiyana dzeHPMC kumba nekune dzimwe nyika pasi pemaikorosikopu

Mifananidzo yemhando dzakasiyana dzeHPMC pasi pemaikorosikopu inogona kuonekwa:①E50 yekune dzimwe nyika uye yemumba 60YT50 HPMC zvese zvinopa chimiro chakaunganidzwa pasi pemaikorosikopu, chimiro chemomorekuru chemumba 60YT50HPMC chine compact uye yunifomu, uye chimiro chemolecular yeE50 yekune dzimwe nyika inoparadzirwa;②Iyo yakaunganidzwa mamiriro epamba 60YT50 HPMC Chimiro chinogona ne theoretically kuderedza kusawirirana pakati pevinyl chloride nemvura, uye kubatsira vinyl chloride kupararira zvakafanana uye kugadzikana mukati memvura yepakati, ndiko kuti, nekuti iyo hydroxypropyl ye60YT50 HPMC yakakwira zvishoma, iyo. inoita kuti ive yakawanda hydrophilic, nepo ES0 Nekuda kweiyo yakakwira yemethoxyl mapoka, ne theoretically, ine yakasimba rabha retention performance;③inodzivirira kubatanidzwa kwevinyl chloride madonhwe mukutanga kweiyo polymerization process;④inodzivirira kubatanidzwa kwepolymer particles pakati uye gare gare matanho e polymerization process. Iyo aggregate dhizaini inonyanya kuongorora kurongeka kweselulosi mamorekuru (crystalline uye amorphous matunhu, saizi uye chimiro cheyuniti cell, iyo yekurongedza fomu yemamorekuru cheni muyuniti sero, saizi yemakristallite, nezvimwewo), iyo yekutarisa chimiro ( molecular chain uye Orienteation yemicrocrystals), nezvimwewo, zvinogoneka kune yakazara yekumisikidza maitiro edonje rakanatswa panguva ye etherification, uye inovandudza iyo yemukati hunhu uye kugadzikana kweHPMC.

3.5 State of HPMC aqueous solution kumba nekune dzimwe nyika

Iyo yemuno neyekunze HPMC yakagadziridzwa kuita 1% mvura ine mvura, uye mwenje wekufambisa 60YT50 HPMC yaive 93%, uye yekunze E50 HPMC yaive 94%, uye pakanga pasina mutsauko mukufambiswa kwechiedza pakati pezviviri izvi.

Zvigadzirwa zvemumba nekunze zveHPMC zvakagadzirirwa kuita 0.5% aqueous solution, uye mhinduro mushure mekunge HPMC cellulose yanyungudutswa yakaonekwa. Zvinogona kuonekwa kubva muziso rakashama kuti kujeka kwezvose zviri zviviri zvakanaka kwazvo, zvakajeka uye zvakajeka, uye hapana huwandu hukuru hwe insoluble fiber, iyo inoratidza kuti hutano hwehupi hupi hupi hupi hupi hupi hupi hupi hupi hupi hupi huri nani. Iyo yakakwirira yemwenje transmittance yemhinduro inoratidza kuti HPMC inobata zvizere mukuita kwe alkalization uye etherification, pasina huwandu hukuru hwehutsvina uye insoluble fibers. Kutanga, inogona kuona zviri nyore kunaka kweHPMC. Mvura yakachena uye mabhuru emhepo.

4. HPMC dispersant application pilot test

Kuti uwedzere kusimbisa kupararira kwekuita kwemumba HPMC mukuita kwepolymerization uye simba rayo pamhando yePVC resin, timu yeR&D yeShandong Yiteng New Materials Co., Ltd. yakashandisa zvigadzirwa zvemukati nekunze zveHPMC sevanoparadzira, uye vepamba HPMC. uye akaunzwa kunze PVA seanoparadzira. Hunhu hwemarezeni akagadzirwa nemhando dzakasiyana dzeHPMC seanoparadzira muChina akaedzwa uye akaenzaniswa, uye mashandisirwo eHPMC muPVC resin akaongororwa uye akakurukurwa.

4.1 Pilot bvunzo maitiro

Iyo polymerization reaction yakaitwa mu6 m3 polymerization kettle. Kuti abvise pesvedzero yemhando yemonomer pamhando yePVC resin, chirimwa chekutyaira chakashandisa nzira yecalcium carbide kugadzira vinyl chloride monomer, uye mvura yemonomer yaive isingasviki makumi mashanu.×10-6. Mushure mekunge vacuum yekettle yepolymerization yakwana, wedzera yakayerwa vinyl chloride nemvura isina ion kune kettle yepolymerization mukutevedzana, uye wobva wawedzera dispersant uye zvimwe zvinowedzera zvinodiwa neformula muketero panguva imwe chete mushure mekuyera. Mushure mekutanga-kukurudzira kwemaminitsi gumi nemashanu, mvura inopisa pa90°C yakaunzwa mubhachi, ichipisa kune tembiricha yepolymerization kuti itange kuita kwepolymerization, uye mvura inotonhorera yakaunzwa mujacket panguva imwe chete, uye tembiricha yekupindura yakadzorwa neDCS. Kana dzvinyiriro yekettle yepolymerization inodonha kusvika 0.15 MPa, iyo polymerization yekushandura inosvika 85% kusvika 90%, kuwedzera terminator kumisa kuita, kudzoreredza vinyl chloride, kupatsanura uye kuomesa kuti uwane PVC resin.

4.2 Pilot bvunzo yepamba 60YT50 uye yekunze E50 HPMC resin kugadzirwa

Kubva pamhando yekuenzanisa data yepamba 60YT50 uye yekune dzimwe nyika E50 HPMC kugadzira PVC resin, zvinogona kuoneka kuti viscosity uye plasticizer kunyura kwemukati 60YT50 HPMC PVC resin yakafanana neiyo yakafanana yekunze zvigadzirwa zveHPMC, ine yakaderera inovhurika nyaya, yakanaka kuzvida. -kukwana, Muyero wakakodzera ndeye 100%, uye iwo maviri ari pedyo zvakanyanya maererano nemhando ye resin. Iyo methoxyl yemukati E50 yekune dzimwe nyika yakakwira zvishoma pane iyo yepamba 60YT50 HPMC, uye kuita kwayo kwerabha kuchengetedza kwakasimba. Iyo yakawanikwa PVC resin iri nani zvishoma pane yepamba HPMC inoparadzira maererano neplasticizer absorption uye inooneka density.

4.3 Dzimba 60YT50 HPMC uye kunze kwenyika PVA inoshandiswa se dispersant kugadzira resin pilot test.

4.3.1 Hunhu hwePVC resin inogadzirwa

PVC resin inogadzirwa neyemukati 60YT50 HPMC uye inotengeswa kunze PVA dispersant. Iyo data yekuenzanisa yemhando inogona kuoneka: kushandisa mhando imwechete 60YT50HPMC uye kunze kwenyika PVA dispersant system kugadzira PVC resin zvakateerana, nekuti ne theoretically 60YTS0 HPMC dispersant ine simba rekupararira kugona uye yakanaka yekuchengeta rabha kuita. Izvo hazvina kunaka sePVA dispersion system. Iyo inooneka density yePVC resin inogadzirwa ne60YTS0 HPMC dispersion system yakadzikira zvishoma pane iyo yePVA dispersant, kunyura kweplasticizer kuri nani, uye avhareji saizi yeresin yakanaka. Mhedzisiro yebvunzo inogona kunyatso ratidza akasiyana hunhu e60YT50 HPMC uye kunze kwenyika PVA dispersant masisitimu, uye zvakare kuratidza zvakanakira nekuipa kwezviviri zvinoparadzira kubva mukuita kwePVC resin. Panyaya ye microstructure, iyo firimu repamusoro reHPMC dispersant resin Thin, resin iri nyore kuisa plastiki panguva yekugadzirisa.

4.3.2 Mamiriro emufirimu wePVC resin particles pasi pe electron microscope

Kucherechedza microstructure ye resin particles, resin particles inogadzirwa ne HPMC dispersant ine microscopic yakaonda "firimu" gobvu; iyo resin particles inogadzirwa nePVA dispersant ine gobvu microscopic "firimu". Pamusoro pezvo, kune vanogadzira calcium carbide resin ine yakakwira yevinyl chloride monomer tsvina, kuitira kuti vaone kugadzikana kweformula system, ivo vanofanirwa kuwedzera huwandu hwekuparadzira, izvo zvinoguma nekuwedzera kwepasi pedhipoziti yezvikamu zveresin. uye kuwedzera kwe "firimu". Kudzika kwekugadzirisa plasticizing kuita hakuna kunaka.

4.4 Pilot bvunzo yemagiredhi akasiyana eHPMC kugadzira PVC resin

4.4.1 Hunhu hwePVC resin inogadzirwa

Uchishandisa akasiyana magiredhi emudzimba eHPMC (aine maviscosities akasiyana uye hydroxypropyl zvemukati) seanoparadzira kamwe chete, huwandu hwekuparadzira i0.060% yevinyl chloride monomer, uye kumiswa kwepolymerization yevinyl chloride kunoitwa pa56.5° C kuti uwane Iyo avhareji saizi yechikamu, inooneka density, uye plasticizer kutorwa kwePVC resin.

Kubva pane izvi zvinogona kuonekwa kuti:①Kana ichienzaniswa ne65YT50 HPMC dispersion system, 75YT100 ine viscosity ye65YT50 HPMC isingasviki 75YT100HPMC, uye iyo hydroxypropyl yemukati zvakare isingasviki 75YT100HPMC, nepo methoxyl yemukati iri pamusoro 75YT10HPMC. Zvinoenderana neiyo theoretical ongororo yevanoparadzira, viscosity uye hydroxypropyl Kudzikira kweiyo base zvirimo kuchatungamira mukudzikira kwekugona kwekuparadzira kweHPMC, uye kuwedzera kweiyo methoxy yemukati inosimudzira kukwidziridzwa kwekunamira kwekugona kuchengetedza kweanoparadzira, ndiko kuti, iyo 65YT50 HPMC dispersion system ichaita kuti avhareji saizi yePVC resin iwedzere (coarse particle size), Iyo inooneka density inowedzera uye kunyudzwa kweplasticizer kunowedzera;②Kana ichienzaniswa ne60YT50 HPMC dispersion system, iyo hydroxypropyl ye60YT50 HPMC yakakura kupfuura iyo ye65YT50 HPMC, uye methoxy yemukati yevaviri iri padyo nepamusoro. Zvinoenderana neiyo disperant theory, iyo yakakwira iyo hydroxypropyl yemukati, yakasimba yekuparadzira kugona kweanoparadzira, saka kugona kwekuparadzira kwe60YT50 HPMC kunowedzerwa; panguva imwe chete, iyo methoxyl yemukati methoxyl iri padyo uye zvirimo zvakakwirira, simba rekuchengetedza glue rakasimba zvakare, Mu60YT50 HPMC uye 65YT50 HPMC dispersion masisitimu emhando imwechete, iyo PVC resin inogadzirwa ne60YT50HPMC pane 65YT50 HPMC dispersion. sisitimu inofanirwa kunge iine diki avhareji saizi (yakanaka particle size) uye yakaderera inooneka density, nekuti methoxyl yemukati mune yekuparadzira system iri padyo ne (rabha retention performance), zvichikonzera kutorwa kweplasticizer yakafanana. Ichi zvakare chikonzero nei 60YT50 HPMC ichiwanzo shandiswa muPVC resin indasitiri pakusarudza PVA uye HPMC composite dispersants. Ehe, kana 65YT50 HPMC ichishandiswa zvine musoro mucomposite dispersion system formula inofanirwawo kutariswa zvinoenderana neyakajeka resin mhando zviratidzo.

4.4.2 Particle morphology yePVC resin particles pasi pe microscope

Iyo particle morphology yePVC resin inogadzirwa nemhando mbiri dze60YT50 HPMC disperants ine akasiyana hydroxypropyl uye methoxyl zvemukati pasi pe microscope inogona kuonekwa: nekuwedzera kwehydroxypropyl uye methoxyl zvemukati, kugona kwekuparadzira kweHPMC, kuchengetwa Kugona glue kunowedzerwa. Kuenzaniswa ne60YT50 HPMC (8.7% hydroxypropyl mass fraction, 28.5% methoxyl mass fraction), iyo PVC resin particles inogadzirwa ndeyenguva dzose, isina muswe, uye zvimedu zvakasununguka.

4.5 Mhedzisiro ye60YT50 HPMC dosage pamhando yePVC resin

Muedzo wemutyairi unoshandisa 60YT50 HPMC sechinoparadzira chimwe chete chine chikamu chikuru cheboka remethoxyl che28.5% uye chikamu chihombe chehydroxypropyl boka re8.5%. Avhareji saizi yechikamu, kuoneka kusimba, uye kunyura kwePVC resin yePVC yakawanikwa nekuita kumisa polymerization yevinyl chloride pa5.°C.

Zvinogona kuoneka kuti sezvo huwandu hwekupararira hunowedzera, ukobvu hweiyo dispersant layer yakashongedzerwa pane inodonhedza pamusoro inowedzera, iyo inosimudzira iyo inoparadzira kuita uye inonamira kuchengetedza kugona kweanoparadzira, zvichikonzera kuderera kweavhareji saizi yePVC. resin uye kuderera kwepamusoro penzvimbo. Iyo inooneka density inowedzera uye kunyura kweplasticizer kunoderera.

5 Mhedziso

(1) Kuita kwekushandisa kwePVC resin yakagadzirwa kubva mudzimba dzeHPMC zvigadzirwa zvasvika padanho rezvakafanana zvigadzirwa zvinotengeswa kunze kwenyika.

(2) Kana HPMC ichishandiswa seimwe dispersant, inogona zvakare kugadzira PVC resin zvigadzirwa zvine zviratidzo zviri nani.

(3) Kuenzaniswa nePVA dispersant, HPMC nePVA dispersant, marudzi maviri ezviwedzere anongoshandiswa seanoparadzira kugadzira resin, uye zviratidzo zvinogadzirwa zvine zvazvakanakira uye zvazvakaipira. HPMC dispersant ine yakakwira pamusoro pekuita uye yakasimba monomer mafuta droplet yekuparadzira kuita. Iyo ine maitiro akafanana nePVA 72 .5% alcoholysis degree yakafanana kuita.

(4) Pasi pemamiriro akafanana emhando, magiredhi akasiyana eHPMC ane methoxyl uye hydroxypropyl akasiyana, ane akasiyana mashandisiro ekugadzirisa indekisi yemhando yePVC resin. 60YT50 HPMC dispersant ine kupararira kuri nani pane 65YT50 HPMC nekuda kweiyo yakakwirira hydroxypropyl content; 65YT50 HPMC Nekuda kweiyo yakakwira methoxy yemukati me dispersant, kuita kwerabha kuchengetedza kwakasimba kupfuura iyo ye60YT50HPMC.

(5) Kazhinji mukugadzirwa kwePVC resin, huwandu hwe60YT50HPMC dispersant inoshandiswa yakasiyana, uye kugadziriswa kwehutano uye kushanda kwePVC resin kunewo kuchinja kuri pachena. Kana iyo dosage ye60YT50 HPMC yakapararira ichiwedzera, avhareji saizi yePVC resin inoderera, density inooneka inowedzera, uye plasticization. Kutora kwemumiririri kunoderera, uye zvinopesana.

Uye zvakare, kana ichienzaniswa nePVA dispersant, HPMC inoshandiswa kugadzira resin akateedzana zvigadzirwa, izvo zvinoratidza elasticity yakakura uye kugadzikana kune ma parameter akadai se polymerization kettle mhando, vhoriyamu, inomutsa, nezvimwewo, uye inogona kuderedza chiitiko chemidziyo kettle madziro anonamira kune iyo kettle, uye kuderedza resin pamusoro firimu Ukobvu, non-chepfu resin, yakakwirira kupisa kugadzikana, kusimudzira kujeka kwe resin kudzika kwerukova kugadzira zvigadzirwa, nezvimwe. Uyezve, yepamba HPMC ichabatsira vagadziri vePVC kuderedza mutengo wekugadzira, kuvandudza kukwikwidza kwemusika, uye kuunza zvakanaka. upfumi hunobatsira.