Whakarāpopototanga: Te whakamahinga o ngā mea o rotohydroxypropyl methylcelluloseI whakaurua mai tētahi hei utu mō te hanga PVC me te tohu polymerization teitei. I rangahaua ngā pānga o ngā momo hydroxypropyl methylcellulose e rua ki ngā āhuatanga o te PVC me te tohu polymerization teitei. I whakaatuhia e ngā hua he mea taea te whakakapi i te hydroxypropyl methyl cellulose ā-whare mō te mea kawemai.
Ko ngā kapia PVC teitei-whakapūhui e pā ana ki ngā kapia PVC me te toharite o te whakapūhui neke atu i te 1,700, he hanganga hononga paku rānei i waenga i ngā ngota, ko ngā mea tino noa ko ngā kapia PVC me te toharite o te whakapūhui o te 2,500 [1]. Ki te whakatauritea ki te kapia PVC noa, he nui te manawanui o te kapia PVC teitei-whakapūhui, he iti te huinga pēhanga, he pai te ātete ki te wera, te ātete ki te koroheketanga, te ātete ki te ngenge me te ātete ki te kakahu. He whakakapinga rapa pai rawa atu, ā, ka taea te whakamahi i roto i ngā rīpene hiri motuka, ngā waea me ngā taura, ngā catheter hauora, me ētahi atu [2].
Ko te tikanga whakaputa o te PVC me te taumata teitei o te polymerization ko te polymerization whakatārewatanga [3-4]. I roto i te whakaputanga o te tikanga whakatārewatanga, he mea nui te kaiwhakamarara hei āwhina, ā, ko tōna momo me te nui ka pā tika ki te āhua o te matūriki, te tohatoha rahi o te matūriki, me te mimiti kirihou o te kapia PVC kua oti. Ko ngā pūnaha marara e whakamahia whānuitia ana ko ngā pūnaha waipiro polyvinyl me ngā pūnaha marara hiato hydroxypropyl methylcellulose me te waipiro polyvinyl, ā, ko te mea whakamutunga te nuinga e whakamahia ana e ngā kaihanga o te whare [5].
1 Ngā rauemi mata matua me ngā whakaritenga
Kei te Ripanga 1 ngā rauemi mata matua me ngā whakaritenga i whakamahia i roto i te whakamātautau. Ka kitea mai i te Ripanga 1 ko te hydroxypropyl methylcellulose ā-whare i tīpakohia i roto i tēnei pepa he rite ki te hydroxypropyl methylcellulose kawemai, e whakarato ana i te whakaritenga mō te whakamātautau whakakapinga i roto i tēnei pepa.
2 Ngā ihirangi whakamātautau
2. 1 Te whakarite i te otinga hydroxypropyl methylcellulose
Tangohia he nui o te wai whakakore iona, maka ki roto i tētahi ipu ka whakamahana ki te 70°C, kātahi ka tāpirihia mārire te hydroxypropyl methylcellulose me te whakaoho tonu. Ka mānu te cellulose i runga i te wai i te tuatahi, kātahi ka marara mārire kia ōrite te ranunga. Whakamataohia te wai kia tae ki te rahinga.
Ripanga 1 Ngā rauemi mata matua me ā rātou whakaritenga
| Ingoa rauemi mata | Whakatakotoranga |
| Monomer konupora winiramu | Kaute kounga ≥99. 98% |
| Wai kua tangohia te tote | Te kawe hiko ≤10.0 μs/cm, te uara pH 5.00 ki te 9.00 |
| Waipiro polyvinyl A | Te tohu o te waipiro 78.5% ki te 81.5%, te ihirangi pungarehu ≤0.5%, te matū pūngāwerewere ≤5.0% |
| Waipiro polyvinyl B | Te tohu waipiro 71． 0% ki te 73． 5%, te matotoru 4.5 ki te 6.5mPa s, te matū pūngāwerewere ≤5.0% |
| Waipiro polyvinyl C | Te tohu o te waipiro 54, 0% ki te 57, 0%, te matotoru 800 ~ 1 400mPa s, te ihirangi totoka 39, 5% ki te 40.5% |
| Hydroxypropyl methylcellulose A kawemai | Matawai 40 ~ 60 mPa s, wāhanga papatipu methoxyl 28% ~ 30%, wāhanga papatipu hydroxypropyl 7% ~ 12%, makuku ≤5. 0% |
| Hydroxypropyl methylcellulose B o te whare | Matawai 40 ~ 60 mPa s, wāhanga papatipu methoxyl 28% ~ 30%, wāhanga papatipu hydroxypropyl 7% ~ 12%, makuku ≤5. 0% |
| Bis (2-ethylhexyl peroxydicarbonate) | Te wāhanga papatipu [ (45 ~ 50) ± 1] % |
2. 2 Tikanga whakamātautau
I runga i tētahi taputapu whakamātautau iti 10 rita, whakamahia te hydroxypropyl methyl cellulose kawemai hei whakahaere i ngā whakamātautau paearu hei whakatau i te tātai taketake o te whakamātautau iti; whakamahia te hydroxypropyl methyl cellulose ā-whare hei whakakapi i te hydroxypropyl methyl cellulose kawemai mō te whakamātautau; i whakaritea ngā hua kapia PVC i hangaia e ngā hydroxypropyl methyl cellulose rerekē hei ako i te whaihua o te whakakapinga o te hydroxypropyl methyl cellulose ā-whare. E ai ki ngā hua o te whakamātautau iti, ka whakahaerehia te whakamātautau whakaputa.
2. 3 Ngā taahiraa whakamātautau
I mua i te tauhohenga, horoia te ipu polymerization, katia te takirere raro, tāpirihia he nui o te wai kua tangohia te tote, kātahi ka tāpirihia te dispersant; katia te taupoki o te ipu, whakamahana i muri i te whakamātautau pēhanga hauota, kātahi ka tāpirihia te monomer vinyl chloride; i muri i te whakaoho makariri, tāpirihia te initiator; Whakamahia te wai hurihuri hei whakaara ake i te pāmahana i roto i te ipu ki te pāmahana tauhohenga, ā, tāpirihia te otinga ammonium bicarbonate i te wā tika i roto i tēnei tukanga hei whakatika i te uara pH o te pūnaha tauhohenga; ina heke te pēhanga tauhohenga ki te pēhanga kua tohua i roto i te tātai, tāpirihia he kaihoko whakamutu me te kaihoko whakakore huka, ā, ka tukuna. Ko te hua oti o te kapia PVC i whiwhihia mā te centrifugation me te whakamaroke, ā, i tangohia he tauira mō te tātari.
2. 4 Ngā tikanga tātari
E ai ki ngā tikanga whakamātautau e tika ana i roto i te paerewa umanga Q31/0116000823C002-2018, i whakamatautauria, i tātarihia hoki te maha o te matotoru, te mātotoru kitea, te matū pupuhi (tae atu ki te wai) me te mimiti kirihou o te 100 karamu PVC repe o te PVC repe kua oti; i whakamatautauria te rahi matūriki toharite o te PVC repe; i tirohia te āhua o ngā matūriki PVC repe mā te whakamahi i te karu hiko matawai.
3 Ngā Hua me te Kōrero
3. 1 Tātaritanga whakatairite o te kounga o ngā puranga rerekē o te kapia PVC i roto i te whakapūhuitanga iti
Pēhia te 2. E ai ki te tikanga whakamātautau i whakaahuatia i roto i te 4, i whakamatautauria ia puranga o te kapia PVC kua oti te hanga, ā, kei te Ripanga 2 ngā hua.
Ngā hua o te Ripanga 2 o ngā puranga whakamātautau iti rerekē
| Puranga | Hydroxypropyl methyl cellulose | Te mātotoru āhua/(g/mL) | Rahi matūriki toharite/μm | Te matotoru/(mL/g) | Te mimiti kirihou o te 100 karamu PVC kapia/karamu | Mea pūngāwerewere/% |
| 1# | Kawemai | 0.36 | 180 | 196 | 42 | 0.16 |
| 2# | Kawemai | 0.36 | 175 | 196 | 42 | 0.20 |
| 3# | Kawemai | 0.36 | 182 | 195 | 43 | 0.20 |
| 4# | Ā-whare | 0.37 | 165 | 194 | 41 | 0.08 |
| 5# | Ā-whare | 0.38 | 164 | 194 | 41 | 0.24 |
| 6# | Ā-whare | 0.36 | 167 | 194 | 43 | 0.22 |
Ka kitea i te Ripanga 2: He tata te matotoru kitea, te maha o te matotoru me te mimiti kirihou o te kapia PVC i whiwhihia mā te whakamahi i ngā momo cellulose rerekē mō te whakamātautau iti; ko te hua kapia i whiwhihia mā te whakamahi i te tātai hydroxypropyl methylcellulose ā-whare he iti ake te rahi matūriki toharite.
E whakaatu ana te Pikitia 1 i ngā whakaahua SEM o ngā hua kapia PVC i whiwhi mā te whakamahi i ngā momo hydroxypropyl methylcellulose.
(1)—Te hydroxypropyl methylcellulose kawemai
(2)—Te hydroxypropyl methylcellulose ā-whare
Pikitia 1 SEM o ngā kapia i hangaia i roto i te polymerizer 10-L i te aroaro o ngā momo hydroxypropyl methyl cellulose rerekē
E kitea ana i te Pikitia 1 he rite tonu ngā hanganga mata o ngā matūriki kapia PVC i hangaia e ngā momo whakamarara cellulose rerekē.
Hei whakarāpopototanga, ka kitea he āheinga te hydroxypropyl methylcellulose ā-whare i whakamatautauria i roto i tēnei tuhinga ki te whakakapi i te hydroxypropyl methylcellulose kawemai.
3. 2 Tātaritanga whakatairite o te kounga o te kapia PVC me te tohu polymerization teitei i roto i te whakamātautau whakaputa
Nā te nui o te utu me te mōrearea o te whakamātautau whakaputa, kāore e taea te whakamahi tika i te kaupapa whakakapinga katoa o te whakamātautau iti. Nō reira, ka whakamahia te kaupapa o te whakanui haere i te ōwehenga o te hydroxypropyl methylcellulose ā-whare i roto i te tauira. Kei te Ripanga 3 ngā hua whakamātautau o ia puranga.
Ripanga 3 Ngā hua whakamātautau o ngā puranga whakaputa rerekē
| Puranga | M (waipiro hydroxypropyl methyl cellulose o te kāinga):M (waipiro hydroxypropyl methyl cellulose kawemai) | Te mātotoru āhua/(g/mL) | Tau matotoru/(mL/g) | Te mimiti kirihou o te 100 karamu PVC kapia/karamu | Mea pūngāwerewere/% |
| 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 |
Ka kitea i roto i te Ripanga 3 te piki haere o te whakamahinga o te hydroxypropyl methylcellulose ā-whare tae noa ki te wā i whakakapia ai te hydroxypropyl methylcellulose kawemai e ngā puranga katoa o te hydroxypropyl methylcellulose ā-whare. Kāore i tino rerekē ngā tohu matua pērā i te mimiti o te plasticizer me te mātotoru kitea, e tohu ana ka taea e te hydroxypropyl methylcellulose ā-whare i tīpakohia i roto i tēnei pepa te whakakapi i te hydroxypropyl methylcellulose kawemai i roto i te hanga.
4 Whakamutunga
Te whakamātautau o te wharehydroxypropyl methyl celluloseI runga i tētahi taputapu whakamātautau iti 10 rita e whakaatu ana he āheinga ki te whakakapi i te hydroxypropyl methyl cellulose kawemai; e whakaatu ana ngā hua whakamātautau whakakapinga whakaputanga e whakamahia ana te hydroxypropyl methyl cellulose ā-whare mō te hanga kapia PVC, kāore he rerekētanga nui o ngā tohu kounga matua o te kapia PVC kua oti me te hydroxypropyl methyl cellulose kawemai. I tēnei wā, he iti ake te utu o te cellulose ā-whare i te mākete i tērā o te cellulose kawemai. Nō reira, ki te whakamahia te cellulose ā-whare i roto i te whakaputanga, ka taea te whakaiti nui i te utu o ngā āwhina whakaputanga.
Wā tuku: Paenga-whāwhā-25-2024