Nchịkọta: Ojiji nke ihe eji eme ụlọhydroxypropyl methylcellulosekama ibubata otu n'ime mmepụta PVC nwere ogo polymerization dị elu, ewebatara. A nyochachara mmetụta nke ụdị hydroxypropyl methylcellulose abụọ nwere na njirimara nke PVC nwere ogo polymerization dị elu. Nsonaazụ ya gosiri na ọ ga-ekwe omume iji dochie hydroxypropyl methyl cellulose dị n'ime ụlọ karịa nke ebubatara.
Resin PVC dị elu nke na-egosi resin PVC nwere nkezi nke ihe karịrị 1,700 ma ọ bụ nke nwere obere njikọ n'etiti molekul, nke kachasị bụ resin PVC nwere nkezi nke polymerization nke 2,500 [1]. Ma e jiri ya tụnyere resin PVC nkịtị, resin PVC dị elu nwere ike iguzogide nrụgide dị elu, obere nrụgide, ezigbo iguzogide okpomọkụ, iguzogide ike ọgwụgwụ na iguzogide iyi. Ọ bụ ihe nnọchi roba zuru oke ma enwere ike iji ya na mpempe mkpuchi ụgbọala, waya na eriri, catheters ahụike, wdg. [2].
Ụzọ mmepụta nke PVC nke nwere oke polymerization bụ isi ihe na-eme ka a ghara inwe polymerization [3-4]. N'ime mmepụta nke usoro nkwụsịtụ ahụ, ihe na-agbasa bụ ihe enyemaka dị mkpa, ụdị na ọnụọgụ ya ga-emetụta kpọmkwem ọdịdị nke irighiri ihe ahụ, nkesa nha nke irighiri ihe ahụ, na nnabata plasticizer nke resin PVC emechara. Sistemụ mgbasa ozi a na-ejikarị eme ihe bụ sistemu alcohol polyvinyl na sistemu mgbasa ozi hydroxypropyl methylcellulose na polyvinyl alcohol composite, ndị nrụpụta ụlọ na-ejikarị nke ikpeazụ eme ihe [5].
1 Isi ihe eji emepụta ihe na nkọwapụta ya
E gosiri ihe ndị bụ isi e ji mee nnwale ahụ na Tebụl 1. Site na Tebụl 1, a pụrụ ịhụ na hydroxypropyl methylcellulose dị n'ime ụlọ nke a họọrọ n'akwụkwọ a kwekọrọ na hydroxypropyl methylcellulose nke e si na ya abata, nke na-enye ihe achọrọ maka ule nnọchi anya dị na akwụkwọ a.
2 Ọdịnaya nnwale
2. 1 Nkwadebe nke ngwọta hydroxypropyl methylcellulose
Were obere mmiri e tinyere n'ime akpa wee kpoo ya ọkụ ruo 70°C, wee jiri nwayọ tinye hydroxypropyl methylcellulose n'okpuru nrụgide mgbe niile. Cellulose ahụ na-efegharị n'elu mmiri ahụ na mbụ, wee gbasaa ya nwayọ nwayọ ruo mgbe ọ ga-agwakọta nke ọma. Jụụ mmiri ahụ ruo mgbe ọ ga-adị jụụ.
Tebụl 1 Ihe ndị bụ isi na nkọwapụta ha
| Aha ihe eji emepụta ihe | Nkọwapụta |
| Monomer Vinyl chloride | Akara ogo≥99. 98% |
| Mmiri e ji nnu mee | Ọkwa nnyefe ≤10. 0 μs/cm, uru pH 5.00 ruo 9.00 |
| Mmanya Polyvinyl A | Ọkwa mmanya 78. 5% ruo 81. 5%, ọdịnaya ntụ ≤0. 5%, ihe na-agbanwe agbanwe ≤5. 0% |
| Mmanya polyvinyl B | Ọkwa mmanya 71. 0% ruo 73. 5%, viscosity 4. 5 ruo 6. 5mPa s, ihe na-agbanwe agbanwe ≤5. 0% |
| Mmanya Polyvinyl C | Ọkwa mmanya 54. 0% ruo 57. 0%, viscosity 800 ~ 1 400mPa s, ọdịnaya siri ike 39. 5% ruo 40. 5% |
| Hydroxypropyl methylcellulose A nke e si mba ọzọ bịa | Viscosity 40 ~ 60 mPa s, methoxyl mass fraction 28% ~ 30%, hydroxypropyl mass fraction 7% ~ 12%, mmiri ≤5.0% |
| Hydroxypropyl methylcellulose B nke ụlọ | Viscosity 40 ~ 60 mPa s, methoxyl mass fraction 28% ~ 30%, hydroxypropyl mass fraction 7% ~ 12%, mmiri ≤5.0% |
| Bis (2-ethylhexyl peroxydicarbonate) | Nkebi oke [ (45 ~ 50) ± 1] % |
2. 2 Usoro nnwale
N'ime obere ngwaọrụ nnwale nke dị lita 10, jiri hydroxypropyl methyl cellulose ebubatara mee nnwale ntụle iji chọpụta usoro bụ isi nke obere nnwale ahụ; jiri hydroxypropyl methyl cellulose nke dị n'ime ụlọ dochie hydroxypropyl methyl cellulose ebubatara maka nnwale; A tụnyere ngwaahịa resin PVC nke hydroxypropyl methyl cellulose dị iche iche mepụtara iji mụọ ohere nnọchi nke hydroxypropyl methyl cellulose dị n'ime ụlọ. Dịka nsonaazụ nke obere nnwale ahụ si dị, a na-eme nnwale mmepụta ahụ.
2. Usoro nnwale atọ
Tupu mmeghachi omume ahụ, hichaa ketulu polymerization, mechie valvụ dị n'okpuru, tinye obere mmiri desalinated, wee tinye ihe na-ekesa ya; mechie mkpuchi ketulu ahụ, hichaa ya mgbe ị gafere ule nrụgide nitrogen, wee tinye monomer vinyl chloride; mgbe oyi na-akpali, tinye ihe na-amalite ya; Jiri mmiri na-agagharị agagharị bulie okpomọkụ dị na ketulu ahụ ruo na okpomọkụ mmeghachi omume, ma tinye ihe ngwọta ammonium bicarbonate n'oge kwesịrị ekwesị n'oge usoro a iji gbanwee uru pH nke sistemụ mmeghachi omume; mgbe nrụgide mmeghachi omume dara na nrụgide akọwapụtara na usoro ahụ, tinye ihe na-akwụsị na ihe na-eme ka mmiri ghara ịdị ọcha, wee wepụ ya. E nwetara ngwaahịa PVC resin emechara site na centrifugation na nkụ, ma nwalee ya maka nyocha.
2. 4 Ụzọ nyocha
Dịka ụzọ nnwale dị mkpa si dị na ọkọlọtọ ụlọ ọrụ Q31/0116000823C002-2018, a nwalere ma nyochaa ọnụọgụ viscosity, njupụta doro anya, ihe na-agbanwe agbanwe (gụnyere mmiri) na nnabata plasticizer nke 100 g resin PVC nke resin PVC emechara; A nwalere nkezi nha nke resin PVC; a hụrụ ọdịdị nke ihe resin PVC site na iji igwe nyocha eletrọn.
Nsonaazụ na Mkparịta ụka 3
3. 1 Nyocha ntụnyere nke ịdị mma nke ụdị resin PVC dị iche iche na obere polymerization
Pịa nke abụọ. Dịka usoro nnwale akọwara na nke anọ si dị, a nwalere obere resin PVC ọ bụla e mechara, a gosikwara nsonaazụ ya na Tebụl nke abụọ.
Tebụl 2 nsonaazụ nke obere ule dị iche iche
| Ogbe | hydroxypropyl methyl cellulose | Njupụta doro anya/(g/mL) | Nkezi nha ihe dị na ya/μm | Viscositi/(mL/g) | Ntinye nke 100 g resin PVC/g nke plastikizer | Ihe na-agbanwe agbanwe/% |
| 1# | Mbubata | 0.36 | 180 | 196 | 42 | 0.16 |
| 2# | Mbubata | 0.36 | 175 | 196 | 42 | 0.20 |
| 3# | Mbubata | 0.36 | 182 | 195 | 43 | 0.20 |
| 4# | Ebe obibi | 0.37 | 165 | 194 | 41 | 0.08 |
| 5# | Ebe obibi | 0.38 | 164 | 194 | 41 | 0.24 |
| 6# | Ebe obibi | 0.36 | 167 | 194 | 43 | 0.22 |
Enwere ike ịhụ ya site na Tebụl 2: Njupụta doro anya, ọnụọgụ viscosity na nnabata plasticizer nke resin PVC enwetara dị nso site na iji cellulose dị iche iche maka obere nnwale; ngwaahịa resin nke e nwetara site na iji usoro hydroxypropyl methylcellulose nke ụlọ. Nkezi nha ihe dị na ya pere mpe.
Foto nke 1 na-egosi onyonyo SEM nke ngwaahịa resin PVC e nwetara site na iji hydroxypropyl methylcellulose dị iche iche.
(1)—hydroxypropyl methylcellulose nke e si mba ọzọ bịa
(2)—hydroxypropyl methylcellulose nke dị n'ime ụlọ
Fig. 1 SEM nke resins emepụtara na polymerizer 10-L n'ihu hydroxypropyl methyl cellulose dị iche iche
A pụrụ ịhụ site na Foto nke 1 na nhazi elu nke ihe ndị dị na PVC resin nke ihe ndị na-ekesa cellulose dị iche iche mepụtara yiri onwe ha.
Na mkpokọta, a pụrụ ịhụ na hydroxypropyl methylcellulose dị n'ime ụlọ a nwalere n'akwụkwọ a nwere ike ịgbanwe hydroxypropyl methylcellulose nke e si mba ọzọ bịa.
3. 2 Nyocha ntụnyere nke ịdị mma nke resin PVC nwere ogo polymerization dị elu na nnwale mmepụta
N'ihi oke ọnụ ahịa na ihe egwu nke nnwale mmepụta, enweghị ike itinye usoro nnọchi zuru oke nke obere nnwale ozugbo. Ya mere, a na-anabata atụmatụ nke ịbawanye oke nke hydroxypropyl methylcellulose dị n'ime usoro ahụ nwayọ nwayọ. Egosiri nsonaazụ nnwale nke ogbe ọ bụla na Tebụl 3. egosiri.
Tebụl 3 Nsonaazụ nnwale nke ụdị mmepụta dị iche iche
| Ogbe | M (ụlọ hydroxypropyl methyl cellulose): M (hydroxypropyl methyl cellulose nke a na-ebubata) | Njupụta doro anya/(g/mL) | Nọmba viscosity/(mL/g) | Ntinye nke 100 g resin PVC/g nke plastikizer | 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 |
A pụrụ ịhụ site na Tebụl nke atọ na ojiji nke hydroxypropyl methylcellulose dị n'ime ụlọ ji nwayọọ nwayọọ mụbaa ruo mgbe otu niile nke hydroxypropyl methylcellulose dị n'ime ụlọ dochie hydroxypropyl methylcellulose dị n'ime ụlọ. Ihe ngosi ndị bụ isi dịka ntinye plasticizer na njupụta doro anya agbanweghị nke ukwuu, na-egosi na hydroxypropyl methylcellulose dị n'ime ụlọ ahọpụtara n'akwụkwọ a nwere ike dochie hydroxypropyl methylcellulose dị n'ime ụlọ na mmepụta.
Mmechi 4
Ule nke ụlọhydroxypropyl methyl cellulosena obere ngwaọrụ nnwale nke L 10 na-egosi na o nwere ike iji dochie hydroxypropyl methyl cellulose ebubatara; nsonaazụ nnwale nnọchi mmepụta na-egosi na a na-eji hydroxypropyl methyl cellulose ime ụlọ maka mmepụta resin PVC, ihe ngosi kachasị mma nke resin PVC emechara na hydroxypropyl methyl cellulose ebubatara enweghị nnukwu ọdịiche. Ugbu a, ọnụahịa cellulose ime ụlọ n'ahịa dị ala karịa nke cellulose ebubatara. Ya mere, ọ bụrụ na ejiri cellulose ime ụlọ na mmepụta, enwere ike ibelata ọnụ ahịa nke ihe enyemaka mmepụta nke ukwuu.
Oge ozi: Eprel-25-2024