Awọn ọrọ pataki: hydroxypropyl methyl cellulose; PVC pẹlu iwọn polymerization giga; idanwo kekere; polymerization; isọdibilẹ.
Ohun elo ti China hydroxypropyl methylcellulosedipo ti gbe wọle ọkan si iṣelọpọ ti PVC pẹlu iwọn polymerization giga ti a ṣe. Awọn ipa ti awọn iru meji ti hydroxypropyl methylcellulose lori awọn ohun-ini ti PVC pẹlu alefa polymerization giga ni a ṣe iwadii. Awọn abajade fihan pe o ṣee ṣe lati paarọ hydroxypropyl methyl cellulose ti ile fun ọkan ti a ko wọle.
Awọn resini PVC giga-ti-polymerization tọka si awọn resini PVC pẹlu iwọn aropin ti polymerization ti o ju 1,700 tabi ọna asopọ agbelebu die-die laarin awọn ohun elo. Ti a ṣe afiwe pẹlu resini PVC lasan, resini PVC giga-polymerization ni resilience giga, ipilẹ funmorawon kekere, resistance ooru ti o dara, resistance ti ogbo, resistance rirẹ ati resistance resistance. O jẹ aropo roba pipe ati pe o le ṣee lo ni awọn ila lilẹ mọto ayọkẹlẹ, okun waya ati okun, awọn catheters iṣoogun, ati bẹbẹ lọ.
Ọna iṣelọpọ ti PVC pẹlu iwọn giga ti polymerization jẹ polymerization idadoro ni akọkọ. Ni iṣelọpọ ti ọna idadoro, dispersant jẹ oluranlowo oluranlowo pataki, ati iru ati iye rẹ yoo ni ipa taara apẹrẹ patiku, pinpin iwọn patiku, ati gbigba ṣiṣu ti resini PVC ti pari. Awọn ọna ṣiṣe pipinka ti o wọpọ julọ jẹ awọn ọna ṣiṣe ọti-waini polyvinyl ati hydroxypropyl methylcellulose ati awọn ọna pipinka oti polyvinyl, ati awọn aṣelọpọ inu ile lo julọ ti igbehin.
1 Awọn ohun elo aise akọkọ ati awọn pato
Awọn ohun elo aise akọkọ ati awọn pato ti a lo ninu idanwo naa ni a fihan ni Tabili 1. O le rii lati Tabili 1 pe hydroxypropyl methylcellulose ti ile ti a yan ninu iwe yii ni ibamu pẹlu hydroxypropyl methylcellulose ti a ko wọle, eyiti o pese pataki ṣaaju fun idanwo aropo ni eyi. iwe.
2 Idanwo akoonu
2. 1 Igbaradi ti hydroxypropyl methylcellulose ojutu
Mu iye kan ti omi diionized, fi sinu apo kan ki o gbona rẹ si 70 ° C, ki o si fi hydroxypropyl methylcellulose diẹdiẹ labẹ fifaru igbagbogbo. Cellulose leefofo lori omi ni akọkọ, ati lẹhinna ti wa ni tuka diẹdiẹ titi ti yoo fi dapọ. Tutu ojutu si iwọn didun.
Table 1 Awọn ohun elo aise akọkọ ati awọn pato wọn
| Orukọ ohun elo aise | Sipesifikesonu |
| Fainali kiloraidi monomer | Dimegilio didara≥99. 98% |
| Desalinated omi | Iwaṣe≤10. 0 μs/cm, pH iye 5. 00 si 9. 00 |
| Polyvinyl oti A | Alcoholysis ìyí 78. 5% si 81. 5%, eeru akoonu≤0. 5%, ọrọ iyipada≤5. 0% |
| Polyvinyl oti B | Alcoholysis ìyí 71. 0% si 73. 5%, viscosity 4. 5 to 6. 5mPa s, alayipada ọrọ≤5. 0% |
| Polyvinyl oti C | Alcoholysis ìyí 54. 0% si 57. 0%, iki 800 ~ 1 400mPa s, akoonu to lagbara 39. 5% si 40.5% |
| Akowọle hydroxypropyl methylcellulose A | Viscosity 40 ~ 60 mPa s, ida ibi-methoxyl 28% ~ 30%, ida ibi-hydroxypropyl 7% ~ 12%, ọrinrin≤5. 0% |
| hydroxypropyl methylcellulose B | Viscosity 40 ~ 60 mPa · s, ida ibi-methoxyl 28% ~ 30%, ida ibi-hydroxypropyl 7% ~ 12%, ọrinrin ≤5. 0% |
| Bis (2-ethyl peroxydicarbonate) hexyl ester) | Ida lowo [( 45 ~ 50) ± 1]% |
2. 2 Ọna idanwo
Lori ẹrọ idanwo kekere 10 L, lo hydroxypropyl methylcellulose ti a ko wọle lati ṣe awọn idanwo ala lati pinnu agbekalẹ ipilẹ ti idanwo kekere; lo hydroxypropyl methylcellulose ti ile lati rọpo hydroxypropyl methylcellulose ti a ko wọle fun idanwo; Awọn ọja resini PVC ti a ṣe nipasẹ hydroxypropyl methylcellulose ni a ṣe afiwe, ati pe o ṣeeṣe lati rọpo hydroxypropyl methylcellulose inu ile ni a ṣe iwadi. Gẹgẹbi awọn abajade ti idanwo kekere, idanwo iṣelọpọ ni a ṣe.
2. 3 Igbeyewo awọn igbesẹ
Ṣaaju ifasẹyin, nu igbona polymerization, pa àtọwọdá isalẹ, ṣafikun iye kan ti omi ti a ti desalinated, lẹhinna ṣafikun dispersant; pa ideri kettle, palẹ lẹhin ti o ti kọja idanwo titẹ nitrogen, lẹhinna fi monomer chloride fainali kun; lẹhin igbiyanju tutu, fi olupilẹṣẹ kun; Lo omi ti n ṣaakiri lati gbe iwọn otutu soke ninu kettle si iwọn otutu ifasẹyin, ati ṣafikun ojutu ammonium bicarbonate ni akoko ti akoko lakoko ilana yii lati ṣatunṣe iye pH ti eto ifaseyin; nigbati titẹ ifasẹyin ba lọ silẹ si titẹ ti a sọ pato ninu agbekalẹ, ṣafikun apanirun ati defoamer, ki o tu ojutu naa silẹ. Ọja ti o pari ti resini PVC ni a gba nipasẹ centrifugation ati gbigbe, ati pe a ṣe ayẹwo fun itupalẹ.
2. 4 Awọn ọna itupalẹ
Gẹgẹbi awọn ọna idanwo ti o yẹ ni boṣewa ile-iṣẹ, nọmba viscosity, iwuwo ti o han gbangba, ọrọ iyipada (pẹlu omi) ati gbigba ṣiṣu ti 100 g PVC resini ti resini PVC ti pari ni idanwo ati itupalẹ; Iwọn patiku apapọ ti resini PVC ni idanwo; awọn mofoloji ti awọn PVC resini patikulu ti a woye nipa lilo a Antivirus itanna maikirosikopu.
3 Awọn esi ati ijiroro
3. 1 Ayẹwo ti o ṣe afiwe ti didara awọn ipele oriṣiriṣi ti resini PVC ni polymerization-kekere
Tẹ 2. Gẹgẹbi ọna idanwo ti a ṣalaye ni 4, ipele kọọkan ti resini PVC ti o pari ni idanwo, ati awọn abajade ti han ni Tabili 2.
Awọn abajade tabili 2 ti awọn ipele oriṣiriṣi ti idanwo kekere
| Ipele | Hydroxypropyl methylcellulose | Ìwọ̀n tó hàn gbangba/(g/ml) | Apapọ patiku iwọn/μm | Viscosity/(ml/g) | Gbigbe pilasita ti 100 g PVC resini/g | Nkan ti o le yipada /% |
| 1# | gbe wọle | 0.36 | 180 | 196 | 42 | 0.16 |
| 2# | gbe wọle | 0.36 | 175 | 196 | 42 | 0.20 |
| 3# | gbe wọle | 0.36 | 182 | 195 | 43 | 0.20 |
| 4# | Abele | 0.37 | 165 | 194 | 41 | 0.08 |
| 5# | Abele | 0.38 | 164 | 194 | 41 | 0.24 |
| 6# | Abele | 0.36 | 167 | 194 | 43 | 0.22 |
O le rii lati Tabili 2: iwuwo ti o han gbangba, nọmba viscosity ati gbigba plasticizer ti resini PVC ti o gba ni isunmọ sunmọ nipa lilo oriṣiriṣi cellulose fun idanwo kekere; ọja resini ti a gba nipasẹ lilo abele hydroxypropyl methylcellulose fomula Iwọn patiku apapọ jẹ kekere diẹ.
Nọmba 1 ṣe afihan awọn aworan SEM ti awọn ọja resini PVC ti a gba nipasẹ lilo oriṣiriṣi hydroxypropyl methylcellulose.
(1) -Akowọle hydroxypropyl methylcellulose
(2)-Abele hydroxypropyl methylcellulose
Eeya. 1 SEM ti awọn resini ti a ṣe ni polymerizer 10-L niwaju oriṣiriṣi hydroxypropyl methyl cellulose.
O le rii lati Nọmba 1 pe awọn ẹya dada ti awọn patikulu resini PVC ti a ṣe nipasẹ awọn dispersants cellulose oriṣiriṣi jẹ iru kanna.
Lati ṣe akopọ, a le rii pe hydroxypropyl methylcellulose inu ile ti a ṣe idanwo ninu iwe yii ni iṣeeṣe lati rọpo hydroxypropyl methylcellulose ti a ko wọle.
3. 2 Iṣiro afiwera ti didara resini PVC pẹlu iwọn polymerization giga ni idanwo iṣelọpọ
Nitori idiyele giga ati eewu ti idanwo iṣelọpọ, ero rirọpo pipe ti idanwo kekere ko le ṣe lo taara, nitorinaa ero naa ni lati mu iwọn diẹ sii ti hydroxypropyl methylcellulose inu ile ni agbekalẹ. Awọn abajade idanwo ti ipele kọọkan jẹ afihan ni Tabili 3 ti o han.
Table 3 Awọn abajade idanwo ti awọn ipele iṣelọpọ oriṣiriṣi
| Ipele | m (China hydroxypropyl methyl cellulose): m (igbewọle hydroxypropyl methyl cellulose) | Ìwọ̀n tó hàn gbangba/(g/ml) | Nọmba viscosity/(ml/g) | Gbigbe pilasita ti 100 g PVC resini/g | Nkan ti o le yipada /% |
| 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 le rii lati Tabili 3 pe lilo ti hydroxypropyl methyl cellulose ti ile ti n pọ si diẹdiẹ titi ti hydroxypropyl methyl cellulose inu ile yoo rọpo patapata hydroxypropyl methyl cellulose ti a ṣe wọle. Awọn afihan akọkọ gẹgẹbi gbigba ṣiṣu ṣiṣu ati iwuwo ti o han gbangba ko yipada ni pataki, ti o nfihan pe hydroxypropyl methylcellulose inu ile ti a yan ninu iwe yii le rọpo hydroxypropyl methylcellulose ti o wọle ni iṣelọpọ.
4 Ipari
Idanwo ti abele hydroxypropyl methyl cellulose lori ẹrọ idanwo kekere 10 L fihan pe o ni agbara lati rọpo hydroxypropyl methyl cellulose ti o wọle; awọn abajade idanwo aropo iṣelọpọ fihan pe hydroxypropyl methyl cellulose ti ile ni a lo fun iṣelọpọ resini PVC, awọn afihan didara akọkọ ti resini PVC ti pari ati hydroxypropyl methyl cellulose ti o wọle ko ni iyatọ pataki. Lọ́wọ́lọ́wọ́ báyìí, iye owó cellulose inú ọjà ti dín kù ju ti cellulose tí a kó wọlé lọ. Nitorinaa, ti a ba lo cellulose inu ile ni iṣelọpọ, idiyele ti awọn iranlọwọ iṣelọpọ le dinku ni pataki.
Akoko ifiweranṣẹ: Oṣu kọkanla-04-2022