Mantsoe a bohlokoa: hydroxypropyl methyl cellulose; PVC e nang le degree e phahameng ea polymerization; teko e nyenyane; polymerization; localization.
Tšebeliso ea China hydroxypropyl methylcellulosesebakeng sa ho romelloa kantle ho naha ho hlahisa PVC e nang le degree e phahameng ea polymerization e ile ea hlahisoa. Litlamorao tsa mefuta e 'meli ea hydroxypropyl methylcellulose ho thepa ea PVC e nang le degree e phahameng ea polymerization e ile ea fuputsoa. Liphetho li bonts'itse hore ho ne ho ka khoneha ho nkela hydroxypropyl methyl cellulose sebakeng sa e tsoang kantle ho naha.
Li-resin tsa PVC tsa boemo bo phahameng ba polymerization li bua ka li-resin tsa PVC tse nang le tekanyo e tloaelehileng ea polymerization e fetang 1,700 kapa sebopeho se hokahaneng hanyane lipakeng tsa limolek'hule. Ha ho bapisoa le resin e tloaelehileng ea PVC, resin e phahameng ea polymerization ea PVC e na le botsitso bo phahameng, sete e nyane ea compression, ho hanyetsa mocheso o motle, ho hanyetsa botsofali, ho hanyetsa mokhathala le ho hanyetsa ho roala. Ke sebaka se loketseng sa rabara 'me se ka sebelisoa ho koala likhoele tsa koloi, terata le thapo, li-catheter tsa bongaka, jj.
Mokhoa oa tlhahiso ea PVC ka tekanyo e phahameng ea polymerization ke haholo-holo ho emisa polymerization. Ha ho etsoa mokhoa oa ho emisa, dispersant ke moemeli ea bohlokoa ea thusang, 'me mofuta oa eona le palo ea eona li tla ama ka ho toba sebopeho sa likaroloana, kabo ea boholo ba likaroloana, le ho kenngoa ha polasetiki ea resin ea PVC e phethiloeng. Litsamaiso tse sebelisoang hangata ke polyvinyl alcohol system le hydroxypropyl methylcellulose le polyvinyl alcohol composite sistimi ea phepelo ea joala, 'me baetsi ba malapeng ba sebelisa ea morao-rao.
1 Lisebelisoa tsa mantlha le litlhaloso
Lisebelisoa tse ka sehloohong tsa lihlahisoa le litlhaloso tse sebelisoang tekong li bontšoa ho Lethathamo la 1. E ka bonoa ho Lethathamo la 1 hore hydroxypropyl methylcellulose ea malapeng e khethiloeng pampiring ena e lumellana le hydroxypropyl methylcellulose e tsoang linaheng tse ling, e fanang ka tlhokahalo ea tlhahlobo ea ho kenya sebaka sena. pampiri.
2 Likahare tsa liteko
2. 1 Tokisetso ea tharollo ea hydroxypropyl methylcellulose
Nka metsi a mangata a senyehileng, a behe ka har'a setshelo ebe o chesa ho 70 ° C, 'me butle-butle eketsa hydroxypropyl methylcellulose tlas'a ho tsosoa kamehla. Selulose e phaphamala ka holim'a metsi qalong, ebe e qhalakanngoa butle-butle ho fihlela e kopane ka ho lekana. Pholisa tharollo ea molumo.
Letlapa la 1 Lisebelisoa tse tala le litlhaloso tsa tsona
| Lebitso la thepa e tala | Tlhaloso |
| Vinyl chloride monomer | Lintlha tsa boleng≥99. 98% |
| Metsi a hloekisitsoeng | Conductivity≤10. 0 μs/cm, pH boleng 5. 00 ho 9. 00 |
| Polyvinyl joala A | Tekanyo ea ho noa joala 78. 5% ho isa ho 81. 5%, litaba tsa molora≤0. 5%, taba e feto-fetohang≤5. 0% |
| Polyvinyl joala B | Tekanyo ea Alcoholysis 71. 0% ho isa ho 73. 5%, viscosity 4. 5 ho 6. 5mPa s, taba e tsitsitseng≤5. 0% |
| Polyvinyl joala C | Tekanyo ea ho noa joala 54. 0% ho isa ho 57. 0%, viscosity 800 ~ 1 400mPa s, litaba tse tiileng 39. 5% ho isa ho 40.5% |
| hydroxypropyl methylcellulose A e tsoang kantle ho naha | Viscosity 40 ~ 60 mPa s, karolo ea boima ba methoxyl 28% ~ 30%, karoloana ea boima ba hydroxypropyl 7% ~ 12%, mongobo≤5. 0% |
| hydroxypropyl methylcellulose B ea lapeng | Viscosity 40 ~ 60 mPa · s, karoloana ea boima ba methoxyl 28% ~ 30%, karoloana ea boima ba hydroxypropyl 7% ~ 12%, mongobo ≤5. 0% |
| Bis(2-ethyl peroxydicarbonate) hexyl ester) | Karolo ea boima [( 45 ~ 50) ± 1]% |
2. 2 Mokhoa oa teko
Ho sesebelisoa sa teko e nyane ea 10 L, sebelisa hydroxypropyl methylcellulose e tsoang kantle ho naha ho etsa liteko tsa benchmark ho fumana mokhoa oa motheo oa tlhahlobo e nyane; sebelisa hydroxypropyl methylcellulose ea lapeng ho nka sebaka sa hydroxypropyl methylcellulose e tsoang kantle ho naha bakeng sa tlhahlobo; Lihlahisoa tsa resin tsa PVC tse hlahisoang ke hydroxypropyl methylcellulose li ile tsa bapisoa, 'me ho ile ha ithutoa monyetla oa ho nkela hydroxypropyl methylcellulose sebaka sa lapeng. Ho ea ka liphello tsa teko e nyenyane, tlhahlobo ea tlhahiso e etsoa.
2. Mehato e 3 ea liteko
Pele ho karabelo, hloekisa kettle ea polymerization, koala valve e ka tlase, eketsa metsi a mangata a desalinated, ebe o eketsa dispersant; koala sekoahelo sa kettle, vacuumize ka mor'a ho feta teko ea khatello ea naetrojene, ebe u eketsa monoma ea vinyl chloride; ka mor'a ho sisinyeha ho batang, eketsa initiator; Sebelisa metsi a potolohang ho phahamisa mocheso ka ketlele ho mocheso oa karabelo, 'me u kenye tharollo ea ammonium bicarbonate ka nako nakong ea ts'ebetso ena ho lokisa boleng ba pH ba sistimi ea karabelo; ha khatello ea karabelo e theohela khatellong e boletsoeng ka foromo, eketsa terminator le defoamer, 'me u lokolle tharollo. Sehlahisoa se felileng sa resin ea PVC se ile sa fumanoa ka centrifugation le ho omisoa, 'me sa etsoa sampole bakeng sa tlhahlobo.
2. 4 Mekhoa ea ho hlahloba
Ho ea ka mekhoa e nepahetseng ea liteko maemong a khoebo, palo ea viscosity, boima bo hlakileng, taba e feto-fetohang (ho kenyeletsoa le metsi) le ho monya polasetiki ea 100 g PVC ea resin e felileng ea PVC e ile ea lekoa le ho hlahlojoa; Karolelano ea boholo ba karoloana ea resin ea PVC e ile ea lekoa; morphology ea likaroloana tsa resin ea PVC e ile ea bonoa ho sebelisoa microscope ea elektronike e hlahlobang.
3 Liphetho le Puisano
3. 1 Tlhahlobo ea papiso ea boleng ba lihlopha tse fapaneng tsa resin ea PVC ho polymerization e nyane.
Tobetsa 2. Ho ea ka mokhoa oa teko o hlalositsoeng ho 4, sehlopha se seng le se seng sa resin ea PVC e phethiloeng e ile ea lekoa, 'me liphetho li bontšoa ho Lethathamo la 2.
Lethathamo la 2 la liphetho tsa lihlopha tse fapaneng tsa tlhahlobo e nyane
| Sehlopha | Hydroxypropyl methylcellulose | Boima bo bonahalang/(g/mL) | Karolelano ea boholo ba karoloana/μm | Viscosity/(mL/g) | Ho kenngoa ha polasetiki ea 100 g PVC resin/g | Lintho tse feto-fetohang/% |
| 1# | Kenya | 0.36 | 180 | 196 | 42 | 0.16 |
| 2# | Kenya | 0.36 | 175 | 196 | 42 | 0.20 |
| 3# | Kenya | 0.36 | 182 | 195 | 43 | 0.20 |
| 4# | Tsa lapeng | 0.37 | 165 | 194 | 41 | 0.08 |
| 5# | Tsa lapeng | 0.38 | 164 | 194 | 41 | 0.24 |
| 6# | Tsa lapeng | 0.36 | 167 | 194 | 43 | 0.22 |
E ka bonoa ho Lethathamo la 2: The density e bonahalang, palo ea viscosity le ho kenngoa ha plasticizer ea resin e fumanoeng ea PVC e batla e le haufi ka ho sebelisa selulose e fapaneng bakeng sa teko e nyenyane; sehlahisoa sa resin se fumanoeng ka ho sebelisa foromo ea malapeng ea hydroxypropyl methylcellulose Ka karolelano boholo ba likaroloana bo nyane hanyenyane.
Setšoantšo sa 1 se bontša litšoantšo tsa SEM tsa lihlahisoa tsa resin tsa PVC tse fumanoang ka ho sebelisa hydroxypropyl methylcellulose e fapaneng.
(1)—Hydroxypropyl methylcellulose e tsoang kantle ho naha
(2) — Hydroxypropyl methylcellulose ea ka tlung
Feie. 1 SEM ea li-resin tse hlahisoang ka 10-L polymerizer ka boteng ba hydroxypropyl methyl cellulose e fapaneng.
E ka bonoa ho Setšoantšo sa 1 hore mehaho e ka holimo ea likaroloana tsa PVC tsa resin tse hlahisoang ke li-cellulose dispersants tse fapaneng li batla li tšoana.
Ho akaretsa, ho ka bonoa hore hydroxypropyl methylcellulose ea lapeng e lekiloeng pampiring ena e na le monyetla oa ho nkela hydroxypropyl methylcellulose e tsoang kantle ho naha.
3. 2 Tlhahlobo e bapisoang ea boleng ba resin ea PVC e nang le tekanyo e phahameng ea polymerization tekong ea tlhahiso
Ka lebaka la litšenyehelo tse phahameng le kotsi ea tlhahlobo ea tlhahiso, morero o feletseng oa phetoho ea teko e nyenyane e ke ke ea sebelisoa ka ho toba, kahoo morero ke ho eketsa butle-butle karolo ea hydroxypropyl methylcellulose ea malapeng ka foromo. Liphetho tsa liteko tsa sehlopha ka seng li bonts'itsoe ho Lethathamo la 3 le bontšitsoeng.
Lethathamo la 3 Liphetho tsa liteko tsa lihlopha tse fapaneng tsa tlhahiso
| Sehlopha | m (China hydroxypropyl methyl cellulose): m (tse tsoang kantle ho naha ea hydroxypropyl methyl cellulose) | Boima bo bonahalang/(g/mL) | Nomoro ea viscosity/(mL/g) | Ho kenngoa ha polasetiki ea 100 g PVC resin/g | Lintho tse feto-fetohang/% |
| 0# | 0:100 | 0.45 | 196 | 36 | 0.12 |
| 1# | 1.25:1 | 0.45 | 196 | 36 | 0.11 |
| 2# | 1.25:1 | 0.45 | 196 | 36 | 0.13 |
| 3# | 1.25:1 | 0.45 | 196 | 36 | 0.10 |
| 4# | 2.50:1 | 0.45 | 196 | 36 | 0.12 |
| 5# | 2.50:1 | 0.45 | 196 | 36 | 0.14 |
| 6# | 2.50:1 | 0.45 | 196 | 36 | 0.18 |
| 7# | 100:0 | 0.45 | 196 | 36 | 0.11 |
| 8# | 100:0 | 0.45 | 196 | 36 | 0.17 |
| 9# | 100:0 | 0.45 | 196 | 36 | 0.14 |
Ho ka bonoa ho Lethathamo la 3 hore ts'ebeliso ea hydroxypropyl methyl cellulose e ntse e eketseha butle-butle ho fihlela hydroxypropyl methyl cellulose e nka sebaka sa hydroxypropyl methyl cellulose e tsoang kantle ho naha. Lipontšo tse ka sehloohong tse kang ho kenngoa ha polasetiki le boima bo bonahalang ha lia ka tsa fetoha haholo, ho bontša hore hydroxypropyl methylcellulose ea malapeng e khethiloeng pampiring ena e ka nka sebaka sa hydroxypropyl methylcellulose e tsoang linaheng tse ling.
4 Qetello
Teko ea lehae ea hydroxypropyl methyl cellulose ka sesebelisoa se senyenyane sa liteko sa 10 L e bonts'a hore e na le monyetla oa ho nka sebaka sa hydroxypropyl methyl cellulose e tsoang kantle ho naha; liphetho tsa tlhahlobo ea sebaka sa tlhahiso li bonts'a hore hydroxypropyl methyl cellulose ea lapeng e sebelisetsoa tlhahiso ea resin ea PVC, matšoao a mantlha a boleng ba resin ea PVC e felileng le cellulose ea hydroxypropyl methyl e tsoang kantle ha e na phapang e kholo. Hajoale, theko ea selulose ea lapeng 'marakeng e tlase ho feta ea cellulose e tsoang kantle ho naha. Ka hona, haeba cellulose ea malapeng e sebelisoa tlhahisong, litšenyehelo tsa lisebelisoa tsa tlhahiso li ka fokotseha haholo.
Nako ea poso: Nov-04-2022