Isi okwu: hydroxypropyl methyl cellulose; PVC nwere ogo polymerization dị elu; obere nnwale; polymerization; localization.
Ngwa nke China hydroxypropyl methylcellulosekama ibubata otu na mmepụta nke PVC na elu polymerization ogo ewebata. Achọpụtara mmetụta nke ụdị abụọ nke hydroxypropyl methylcellulose na njirimara nke PVC nwere ogo polymerization dị elu. Nsonaazụ gosiri na ọ ga-ekwe omume iji dochie ụlọ hydroxypropyl methyl cellulose maka ibubata.
Ihe mkpuchi PVC dị elu nke polymerization na-ezo aka na resins PVC nwere ogo nke polymerization karịa 1,700 ma ọ bụ usoro njikọ dị ntakịrị n'etiti ụmụ irighiri ihe. N'iji ya na resin PVC nkịtị, resin PVC elu-polymerization nwere nnukwu resilience, obere mkpakọ setịpụ, ezigbo okpomọkụ na-eguzogide, ịka nká, ike ọgwụgwụ na eyi iguzogide. Ọ bụ ezigbo ihe eji dochie rọba ma nwee ike iji ya na mpempe mkpuchi ụgbọ ala, waya na eriri, catheters ahụike, wdg.
Usoro mmepụta nke PVC nwere ogo dị elu nke polymerization bụ tumadi nkwusioru polymerization. Na mmepụta nke usoro nkwusioru, onye na-ekesa bụ ihe enyemaka enyemaka dị mkpa, na ụdị ya na ego ya ga-emetụta kpọmkwem ọdịdị ọdịdị ahụ, nkesa nha nha, na ntinye plasticizer nke resin PVC emechara. Usoro mgbasa ozi a na-ejikarị bụ polyvinyl alcohol system na hydroxypropyl methylcellulose na polyvinyl alcohol composite dispersion system, na ndị na-emepụta ụlọ na-ejikarị nke ikpeazụ.
1 Isi akụrụngwa na nkọwapụta
A na-egosi isi ihe na nkọwapụta eji eme ihe na ule ahụ na Tebụl 1. Enwere ike ịhụ site na Tebụl 1 na ụlọ hydroxypropyl methylcellulose nke a na-ahọrọ na akwụkwọ a kwekọrọ na hydroxypropyl methylcellulose a na-ebubata, bụ nke na-enye ihe dị mkpa maka ule ngbanwe na nke a. akwụkwọ.
2 Nwalee ọdịnaya
2. 1 Nkwadebe nke hydroxypropyl methylcellulose ngwọta
Were ntakịrị mmiri nke deionized, tinye ya n'ime akpa ma kpoo ya ruo 70 Celsius C, ma jiri nwayọọ nwayọọ tinye hydroxypropyl methylcellulose n'okpuru mkpali mgbe niile. Cellulose na-ese n'elu mmiri na mbụ, wee jiri nwayọọ nwayọọ gbasaa ruo mgbe agwakọtara ya. Mee ka ngwọta dị jụụ na olu.
Isiokwu 1 Isi akụrụngwa na nkọwa ha
| Aha akụrụngwa | Nkọwapụta |
| Vinyl chloride monomer | Ogo akara ≥99. 98% |
| Mmiri esaghị mmiri | Nrụ ọrụ≤10. 0 μs/cm, pH uru 5. 00 ruo 9. 00 |
| Polyvinyl mmanya A | Alcoholysis ogo 78. 5% ruo 81. 5%, ọdịnaya ntụ ≤0. 5%, ihe na-agbanwe agbanwe≤5. 0% |
| Polyvinyl mmanya B | Alcoholysis ogo 71. 0% ruo 73. 5%, viscosity 4. 5 ruo 6. 5mPa s, ihe na-agbanwe agbanwe≤5. 0% |
| Polyvinyl mmanya C | Alcoholysis ogo 54. 0% ruo 57. 0%, viscosity 800 ~ 1 400mPa s, siri ike ọdịnaya 39. 5% ruo 40.5% |
| Hydroxypropyl methylcellulose A | Viscosity 40 ~ 60mPa s, methoxyl uka akụkụ 28% ~ 30%, hydroxypropyl uka akụkụ 7% ~ 12%, mmiri≤5. 0% |
| Ụlọ hydroxypropyl methylcellulose B | Viscosity 40 ~ 60mPa · s, methoxyl uka akụkụ 28% ~ 30%, hydroxypropyl uka akụkụ 7% ~ 12%, mmiri ≤5. 0% |
| Bis (2-ethyl peroxydicarbonate) hexyl ester) | Iberibe oke ((45 ~ 50) ± 1]% |
2.2 Usoro ule
Na ngwaọrụ nnwale 10 L, jiri hydroxypropyl methylcellulose ebubata iji mee ule benchmark iji chọpụta usoro bụ isi nke obere ule; jiri ụlọ hydroxypropyl methylcellulose dochie anya hydroxypropyl methylcellulose ebubata maka nnwale; A tụlere ngwaahịa resin PVC nke hydroxypropyl methylcellulose mepụtara, a nyochakwara ike iji dochie hydroxypropyl methylcellulose ụlọ. Dị ka nsonaazụ nke obere ule ahụ si kwuo, a na-eme nnwale mmepụta.
2.3 Nnwale nzọụkwụ
Tupu mmeghachi omume ahụ, hichaa kettle polymerization, mechie valvụ dị n'okpuru, gbakwunye mmiri mmiri na-ekpo ọkụ, wee gbakwunye onye na-ekesa; mechie mkpuchi kettle, kpochapu mgbe ị gafechara ule nrụgide nitrogen, wee tinye vinyl chloride monomer; mgbe akpalite oyi, gbakwunye onye mmalite; Jiri mmiri na-ekesa na-ebuli okpomọkụ dị na kettle na okpomọkụ mmeghachi omume, ma gbakwunye ngwọta ammonium bicarbonate n'oge kwesịrị ekwesị n'oge usoro a iji dozie uru pH nke usoro mmeghachi omume; mgbe nrụgide mmeghachi omume na-adaba na nrụgide akọwapụtara na usoro ahụ, gbakwunye njedebe na defoamer, ma hapụ ngwọta ahụ. Emechara ngwaahịa nke resin PVC site na centrifugation na ihicha, wee tụọ ya maka nyocha.
2. 4 Ụzọ nyocha
Dị ka usoro ule dị mkpa na ọkọlọtọ ụlọ ọrụ si dị, ọnụọgụ viscosity, njupụta pụtara ìhè, ihe na-agbanwe agbanwe (gụnyere mmiri) na ntinye plasticizer nke 100 g PVC resin nke resin PVC emechara ka anwale ma nyochaa; A nwalere nkezi urughuru nke resin PVC; a hụrụ morphology nke akụkụ ahụ resin PVC site na iji microscope eletrọn na-enyocha.
3 Nsonaazụ na Mkparịta ụka
3. 1 Ntụle nyocha nke àgwà dị iche iche nke resin PVC na obere polymerization
Pịa 2. Dị ka usoro ule akọwara na 4 si dị, a nwalere ogbe ọ bụla nke obere PVC resin emechara, na-egosikwa nsonaazụ ya na Tebụl 2.
Isiokwu 2 nsonaazụ batches dị iche iche nke obere ule
| Ogbe | Hydroxypropyl methylcellulose | Njupụta pụtara ìhè/(g/ml) | Nkezi nha/μm | Viscosity/(ml/g) | Ntinye plastik nke 100 g PVC resin / g | Ihe na-agbanwe agbanwe/% |
| 1# | Bubata | 0.36 | 180 | 196 | 42 | 0.16 |
| 2# | Bubata | 0.36 | 175 | 196 | 42 | 0.20 |
| 3# | Bubata | 0.36 | 182 | 195 | 43 | 0.20 |
| 4# | Ụlọ | 0.37 | 165 | 194 | 41 | 0.08 |
| 5# | Ụlọ | 0.38 | 164 | 194 | 41 | 0.24 |
| 6# | Ụlọ | 0.36 | 167 | 194 | 43 | 0.22 |
Enwere ike ịhụ ya site na Tebụl 2: Njupụta pụtara ìhè, ọnụọgụ viscosity na ntinye plasticizer nke resin PVC enwetara dị nso site na iji cellulose dị iche iche maka obere ule; ngwaahịa resin enwetara site na iji usoro ụlọ hydroxypropyl methylcellulose The nkezi urughuru size bụ ubé nta.
Ọgụgụ 1 na-egosi onyonyo SEM nke ngwaahịa resin PVC enwetara site na iji hydroxypropyl methylcellulose dị iche iche.
(1)—Hydroxypropyl methylcellulose ebubata
(2) - Hydroxypropyl methylcellulose nke ụlọ
Fig. 1 SEM nke resins emepụtara na 10-L polymerizer na ọnụnọ nke hydroxypropyl methyl cellulose dị iche iche.
Enwere ike ịhụ site na eserese 1 na ihe ndị dị n'elu nke PVC resin particles nke ndị na-ekesa cellulose dị iche iche na-emepụta yiri nke ahụ.
N'ịchịkọta, enwere ike ịhụ na ụlọ hydroxypropyl methylcellulose nke a nwalere n'akwụkwọ a nwere ike iji dochie hydroxypropyl methylcellulose ebubata.
3. 2 Ntụle nyocha nke ịdị mma nke resin PVC nwere ogo polymerization dị elu na ule mmepụta
N'ihi ọnụ ahịa dị elu na ihe ize ndụ nke ule mmepụta ahụ, a pụghị itinye atụmatụ ngbanwe zuru oke nke obere ule ahụ, ya mere atụmatụ a bụ iji nwayọọ nwayọọ mụbaa oke nke hydroxypropyl methylcellulose nke ụlọ na usoro. E gosipụtara nsonaazụ ule nke ọ bụla na tebụl 3 egosiri.
Tebụl 3 Nnwale nsonaazụ nke batches mmepụta dị iche iche
| Ogbe | m (China hydroxypropyl methyl cellulose): m (hydroxypropyl methyl cellulose ebubata) | Njupụta pụtara ìhè/(g/ml) | Nọmba viscosity/(ml/g) | Ntinye plastik nke 100 g PVC resin / g | Ihe na-agbanwe agbanwe/% |
| 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 |
Enwere ike ịhụ site na Tebụl nke 3 na ojiji nke hydroxypropyl methyl cellulose na-eji nwayọ na-abawanye ruo mgbe hydroxypropyl methyl cellulose nke ụlọ na-edochi kpamkpam hydroxypropyl methyl cellulose ebubata. Ihe ngosi ndị bụ isi dị ka ntinye nke plasticizer na njupụta pụtara ìhè agbanwebeghị nke ọma, na-egosi na ụlọ hydroxypropyl methylcellulose nke ahọpụtara n'akwụkwọ a nwere ike dochie hydroxypropyl methylcellulose ebubata na mmepụta.
4 Nkwubi okwu
Nnwale nke hydroxypropyl methyl cellulose nke ụlọ na obere ngwaọrụ 10 L na-egosi na ọ nwere ike iji dochie hydroxypropyl methyl cellulose na-ebubata; Nsonaazụ ngbanwe mmepụta ihe na-egosi na a na-eji hydroxypropyl methyl cellulose ụlọ eme ihe maka mmepụta resin PVC, ihe ngosi kachasị mma nke resin PVC emechara na hydroxypropyl methyl cellulose ebubata enweghị nnukwu ọdịiche. Ka ọ dị ugbu a, ọnụ ahịa cellulose ụlọ n'ahịa dị ala karịa nke cellulose ebubata. Ya mere, ọ bụrụ na a na-eji cellulose ụlọ eme ihe na mmepụta, ọnụ ahịa ihe enyemaka mmepụta nwere ike belata nke ukwuu.
Oge nzipu: Nov-04-2022