Abstract: Te tono o te wharehydroxypropyl methylcelluloseengari i kawemai tetahi ki te hanga PVC me te tohu polymerization teitei i whakauruhia. I tirotirohia nga paanga o nga momo hydroxypropyl methylcellulose e rua ki nga ahuatanga o te PVC me te tohu polymerization teitei. I kitea e nga hua ka taea te whakakapi i te hydroxypropyl methyl cellulose ki te kawemai.
Ko nga kapia PVC teitei o te polymerization e tohu ana ki nga kapia PVC me te tohu toharite o te polymerization neke atu i te 1,700, me te hanga hononga paku i waenga i nga ngota, i roto i enei ko te nuinga o nga kapia PVC me te tohu toharite o te polymerization o 2,500 [1]. Ka whakatauritea ki te kapia PVC noa, he nui te kaha o te kapia PVC polymerization, he huinga iti, he pai te wera o te wera, he pakeke te pakeke, he ngoikore te ngenge me te kakahu. He pai rawa te whakakapi rapa, ka taea te whakamahi i roto i nga taarai hiri motokoto, nga waea me nga taura, nga rongoa rongoa, me etahi atu.
Ko te tikanga whakaputa o te PVC me te nui o te polymerization ko te nuinga o te polymerization whakatārewa [3-4]. I roto i te hanga o te tikanga whakatārewatanga, ko te dispersant he kaihoko awhina nui, me tona momo me te nui ka pa tika ki te ahua matūriki, te tohatoha rahi matūriki, me te whakauru plasticizer o te kapia PVC kua oti. Ko nga punaha marara e whakamahia nuitia ana ko nga punaha waipiro polyvinyl me te hydroxypropyl methylcellulose me te polyvinyl alcohol composite dispersion system, a ko te nuinga o nga kaihanga o te whare kei te whakamahi i enei [5].
1 Nga rauemi mata matua me nga whakaritenga
Ko nga rauemi mata matua me nga tohu e whakamahia ana i roto i te whakamatautau e whakaatuhia ana i te Ripanga 1. Ka kitea mai i te Ripanga 1 ko te hydroxypropyl methylcellulose whare kua tohua i roto i tenei pepa e rite ana ki te hydroxypropyl methylcellulose kawemai, e whakarato ana i te waahanga mo te whakamatautau whakakapi i tenei pepa.
2 Whakamatau ihirangi
2. 1 Te whakarite wairewa hydroxypropyl methylcellulose
Ka mau ki te wai kaoona, ka maka ki roto i te ipu ka whakamahana ki te 70°C, ka taapirihia te hydroxypropyl methylcellulose i raro i te whakaoho tonu. Ka rewa te cellulose ki runga i te wai i te tuatahi, katahi ka marara haere kia uru noa. Whakamaohia te otinga ki te rōrahi.
Ripanga 1 Ko nga rawa matua me o raatau whakaritenga
| Ingoa rawa | Whakatakotoranga |
| Vinyl chloride monomer | Kounga kounga≥99. 98% |
| Te wai whakaheke | Conductivity≤10. 0 μs/cm, uara pH 5. 00 ki te 9. 00 |
| Te waipiro polyvinyl A | Tohu waipiro 78. 5% ki te 81. 5%, ihirangi pungarehu≤0. 5%, mea hūpekepeke≤5. 0% |
| Te waipiro polyvinyl B | Tohu waipiro 71. 0% ki te 73. 5%, te pokey 4. 5 ki te 6. 5mPa s, mea pähekeheke≤5. 0% |
| Te waipiro polyvinyl C | Tohu waipiro 54. 0% ki te 57. 0% , pokey 800 ~ 1 400mPa s, ihirangi totoka 39． 5% ki te 40. 5% |
| Hydroxypropyl methylcellulose A kawemai | Viscosity 40 ~ 60 mPa s, hautau papatipu methoxyl 28% ~ 30%, hautanga papatipu hydroxypropyl 7% ~ 12%, makuku ≤5. 0% |
| Hydroxypropyl methylcellulose B o te kainga | Viscosity 40 ~ 60 mPa s, hautau papatipu methoxyl 28% ~ 30%, hautanga papatipu hydroxypropyl 7% ~ 12%, makuku ≤5. 0% |
| Bis (2-ethylhexyl peroxydicarbonate) | Hautau papatipu [ (45 ~ 50) ± 1] % |
2. 2 Tikanga whakamatautau
I runga i te taputapu whakamatautau iti 10 L, whakamahia te hydroxypropyl methyl cellulose kawemai ki te whakahaere i nga whakamatautau tohu hei whakatau i te tauira taketake o te whakamatautau iti; whakamahi hydroxypropyl methyl cellulose kāinga ki te whakakapi hydroxypropyl methyl cellulose kawemai hei whakamatautau; Ko nga hua kapia PVC i hangaia e nga rereke hydroxypropyl methyl cellulose i whakatairitehia ki te ako i te kaha whakakapinga o te hydroxypropyl methyl cellulose o te kainga. E ai ki nga hua o te whakamatautau iti, ka whakahaerehia te whakamatautau whakaputa.
2. 3 Nga mahi whakamatautau
I mua i te tauhohenga, horoia te ketere polymerization, kati te pihanga o raro, taapirihia te nui o te wai whakaheke, katahi ka tapirihia te dispersant; kati te taupoki o te ketere, whakawetohia i muri i te paahitanga o te whakamatautau hauota, katahi ka tapirihia te monomer vinyl chloride; i muri i te whakaoho makariri, tāpirihia te kaikōkiri; Whakamahia te wai tohanga hei whakanui ake i te pāmahana i roto i te ketere ki te pāmahana tauhohenga, me te taapiri i te wairewa haukinia bicarbonate i te wa tika i roto i tenei mahi ki te whakatika i te uara pH o te punaha tauhohenga; ka heke iho te pehanga tauhohenga ki te pehanga kua tohua i roto i te tauira, taapirihia he kaihoko whakamutu me te kaikawe whakaheke, ka tukuna Ko te hua o te PVC resin i whiwhihia e te centrifugation me te whakamaroke, me te tauira mo te tātari.
2. 4 Nga tikanga tātari
E ai ki nga tikanga whakamatautau e tika ana i roto i te paerewa hinonga Q31 / 0116000823C002-2018, i whakamatauria, i tātarihia te tau viscosity, te kiato kitea, te mea wariu (tae atu ki te wai) me te whakaurunga plasticizer o te 100 g PVC kapia o te kapia PVC kua oti; Ko te rahi o te matūriki toharite o te PVC resin i whakamatauria; i kitea te ahua o nga matūriki kapia PVC ma te whakamahi i te karu irahiko matawai.
3 Nga Hua me te Matapaki
3. 1 Te tātari whakatairite o te kounga o nga huinga rereke o te PVC resin i roto i te polymerization iti
Perehi 2. E ai ki te tikanga whakamatautau i whakaahuatia i te 4, i whakamatauria ia puranga o te kapia PVC kua oti te tauine iti, a ka whakaatuhia nga hua ki te Ripanga 2.
Ripanga 2 nga hua o nga roopu rereke o te whakamatautau iti
| Puranga | Hydroxypropyl methyl cellulose | Kiato ahua/(g/mL) | Rahi matūriki toharite/μm | Viscosity/(mL/g) | Plasticizer absorption o 100 g PVC resin/g | Mahinga karekau/% |
| 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# | I roto i te kainga | 0.37 | 165 | 194 | 41 | 0.08 |
| 5# | I roto i te kainga | 0.38 | 164 | 194 | 41 | 0.24 |
| 6# | I roto i te kainga | 0.36 | 167 | 194 | 43 | 0.22 |
Ka kitea mai i te Ripanga 2: Ko te ahua o te kiato, te tau pokey me te whakaurunga o te kapia PVC kua whiwhi he tata tonu ma te whakamahi i nga cellulose rereke mo te whakamatautau iti; te hua kapia i riro mai ma te whakamahi i te tauira hydroxypropyl methylcellulose whare He iti ake te rahi o te matūriki toharite.
Ko te Whakaahua 1 e whakaatu ana i nga whakaahua SEM o nga hua kapia PVC i riro mai ma te whakamahi i nga rereke hydroxypropyl methylcellulose.
(1)—He hydroxypropyl methylcellulose kawemai
(2)—Waehanga hydroxypropyl methylcellulose
Fig. 1 SEM o nga kapia i hangaia i roto i te 10-L polymerizer i te aroaro o nga rereke hydroxypropyl methyl cellulose
Ka kitea mai i te Whakaahua 1 he rite tonu nga hanganga mata o nga matūriki kapia PVC i hangaia e nga momo marara cellulose.
Hei whakarapopototanga, ka kitea ko te hydroxypropyl methylcellulose whare i whakamatauria i roto i tenei pepa he kaha ki te whakakapi i te hydroxypropyl methylcellulose kawemai.
3. 2 Te whakataurite i te kounga o te PVC resin me te tohu polymerization teitei i roto i te whakamatautau whakaputa
Na te nui o te utu me te tupono o te whakamatautau whakangao, kaore e taea te tono tika te kaupapa whakakapinga o te whakamatautau iti. Na reira, ko te kaupapa o te whakanui haere i te wahanga o te hydroxypropyl methylcellulose o te kainga i roto i te tauira ka whakamahia. Kei te Ripanga 3 nga hua whakamatautau o ia puranga.
Ripanga 3 Nga hua whakamatautau o nga momo whakaputanga rereke
| Puranga | M (hydroxypropyl methyl cellulose kāinga):M (hydroxypropyl methyl cellulose kawemai) | Kiato ahua/(g/mL) | Tau pokey/(mL/g) | Plasticizer absorption o 100 g PVC resin/g | Mahinga karekau/% |
| 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 mai i te Ripanga 3 i piki haere te whakamahinga o te hydroxypropyl methylcellulose kainga tae noa ki nga puranga katoa o te hydroxypropyl methylcellulose kainga ka whakakapihia te hydroxypropyl methylcellulose kawemai. Ko nga tohu matua penei i te whakaurunga plasticizer me te kiato ahua kaore i tino rerekee, e tohu ana ka taea e te hydroxypropyl methylcellulose kainga kua tohua i roto i tenei pepa te whakakapi i te hydroxypropyl methylcellulose kawemai i roto i te mahi.
4 Whakamutunga
Ko te whakamatautau o te wharehydroxypropyl methyl cellulosei runga i tetahi taputapu whakamatautau iti 10 L e whakaatu ana ka taea e ia te whakakapi i te hydroxypropyl methyl cellulose kawemai; Ko nga hua whakamatautau whakakapinga whakangao e whakaatu ana ka whakamahia te hydroxypropyl methyl cellulose whare mo te hanga kapia PVC, ko nga tohu kounga matua o te kapia PVC kua oti me te kawemai hydroxypropyl methyl cellulose kaore he rereketanga nui. I tenei wa, he iti ake te utu o te cellulose kaainga i te maakete i tera o te cellulose kawemai. No reira, mena ka whakamahia te cellulose o te kaainga ki te whakaputa, ka tino heke te utu mo nga awhina whakaputa.
Te wa tuku: Apr-25-2024