Erayada muhiimka ah: hydroxypropyl methyl cellulose; PVC oo leh shahaadada polymerization sare; tijaabo yar; polymerization; deegaanayn.
Codsiga Shiinaha hydroxypropyl methylcellulosehalkii laga soo dejin lahaa mid ka mid ah wax soo saarka PVC oo leh shahaadada polymerization sare ayaa la soo bandhigay. Saamaynta labada nooc ee hydroxypropyl methylcellulose ee sifooyinka PVC ee leh shahaadada polymerization sare ayaa la baaray. Natiijooyinka waxay muujiyeen in ay suurtagal tahay in lagu beddelo hydroxypropyl methyl cellulose gudaha mid dibadda laga keeno.
Xirmooyinka PVC-ga-sare ee-polymerization-ku waxay tixraacaan resins-ka PVC oo leh celcelis ahaan polymerization in ka badan 1,700 ama qaab-dhismeed yar oo iskutallaab ah oo u dhexeeya molecules. Marka la barbar dhigo xabagta PVC ee caadiga ah, xabagta PVC-polymerization-sare ayaa leh adkeysi sare leh, dejin yar oo cadaadis ah, caabbinta kulaylka wanaagsan, caabbinta gabowga, caabbinta daalka iyo xirashada caabbinta. Waa beddelka caagga ah ee ugu habboon waxaana loo isticmaali karaa gawaadhida xidhidhiyaha, siliga iyo fiilada, tuubooyinka caafimaadka, iwm.
Habka wax soo saarka ee PVC oo leh heerar sare oo polymerization ah ayaa inta badan ah polymerization hakinta. In wax soo saarka ee habka hakinta, kala firdhiyey waa wakiilka kaaliyaha muhiim ah, iyo nooca iyo qadarka si toos ah u saameyn doonaa qaabka qayb, qaybinta size qayb, iyo nuugista balaastik ah ee xabagta PVC dhammeeyey. Nidaamyada kala firdhisan ee sida caadiga ah loo isticmaalo waa nidaamyada alkolada polyvinyl iyo hydroxypropyl methylcellulose iyo polyvinyl alkohol hababka kala firidhsan, iyo soo saarayaasha gudaha inta badan isticmaalaan kan dambe .
1 alaabta ceeriin ee ugu weyn iyo tilmaamo
Qalabka ugu muhiimsan ee cayriin iyo sifooyinka loo isticmaalo imtixaanka ayaa lagu muujiyay shaxda 1. Waxaa laga arki karaa shaxda 1 in hydroxypropyl methylcellulose gudaha ee lagu doortay warqadan ay la socoto hydroxypropyl methylcellulose ee dibadda laga keeno, taas oo bixisa shuruud ah imtixaanka beddelka ee tan. warqad.
2 Tijaabi waxa ku jira
2. 1 Diyaarinta xalka hydroxypropyl methylcellulose
Qaado qaddar cayiman oo biyo ah, ku rid weel oo kuleyl ilaa 70 ° C, oo si tartiib ah ugu dar hydroxypropyl methylcellulose hoostiisa walaaq joogto ah. Cellulose-ku wuxuu ku dul sabeeyaa biyaha marka hore, ka dibna si tartiib tartiib ah ayaa loo kala firdhiyaa ilaa ay si siman isku dhafan yihiin. Qabooji xalka mugga.
Shaxda 1aad alaabta ceeriin ee ugu muhiimsan iyo tilmaamahooda
| Magaca alaabta ceeriin | Tilmaamid |
| Vinyl chloride monomer | Dhibcaha tayada≥99. 98% |
| Biyo aan cusbayn | Waxqabadka≤10. 0 μs/cm, pH qiimaha 5. 00 ilaa 9. 00 |
| Khamriga Polyvinyl A | Darajada Alcoholysis 78. 5% ilaa 81. 5%, waxa ku jira dambas≤0. 5%, arrin aan isbeddelayn≤5. 0% |
| Polyvinyl khamriga B | Darajada Alcoholysis 71. 0% ilaa 73. 5%, viscosity 4. 5 to 6. 5mPa s, xaalad kacsan≤5. 0% |
| Khamriga Polyvinyl C | Darajada Alcoholysis 54. 0% ilaa 57. 0%, viscosity 800 ~ 1 400mPa s, content adag 39. 5% ilaa 40.5% |
| Hydroxypropyl methylcellulose A | Viscosity 40 ~ 60 mPa s, jajab cufka methoxyl 28% ~ 30%, jajab cufeedka hydroxypropyl 7% ~ 12%, qoyaan≤5. 0% |
| Hydroxypropyl methylcellulose B | Viscosity 40 ~ 60mPa · s, jajab cufka methoxyl 28% ~ 30%, jajab mass hydroxypropyl 7% ~ 12%, qoyaan ≤5. 0% |
| Bis (2-ethyl peroxydicarbonate) hexyl ester) | Jajabka tirada badan [( 45 ~ 50) ± 1]% |
2. 2 Habka tijaabada
Qalabka tijaabada yar ee 10L, isticmaal hydroxypropyl methylcellulose oo dibadda laga keeno si aad u samayso tijaabooyinka cabbirka si loo go'aamiyo qaacidada aasaasiga ah ee tijaabada yar; isticmaal hydroxypropyl methylcellulose gudaha si aad u bedesho hydroxypropyl methylcellulose ee dibadda laga keeno si loo baaro; Badeecadaha xabagta PVC ee ay soo saartay hydroxypropyl methylcellulose ayaa la is barbardhigay, waxaana la darsay suurtagalnimada beddelka hydroxypropyl methylcellulose gudaha. Marka loo eego natiijooyinka tijaabada yar, tijaabada wax soo saarka ayaa la sameeyaa.
2. 3 Tijaabada Tijaabada
Kahor falcelinta, nadiifi kiliyaha polymerization, xidh valve hoose, ku dar qadar gaar ah oo biyo nadiif ah, ka dibna ku dar qaybiyaha; xidh daboolka kiliyaha, faaqidi ka dib markaad ka gudubto tijaabada cadaadiska nitrogen, ka dibna ku dar monomer vinyl chloride; ka dib walaaqaya qabow, ku dar bilawga; Isticmaal biyaha wareega si aad kor ugu qaaddo heerkulka kiliyaha ilaa heerkulka falcelinta, oo ku dar xalinta ammonium bicarbonate waqti ku habboon inta lagu jiro habkan si loo hagaajiyo qiimaha pH ee habka falcelinta; marka cadaadiska falcelintu uu hoos ugu dhaco cadaadiska lagu sheegay qaacidada, ku dar terminator iyo foamer, oo sii daaya xalka. Alaabta dhammaatay ee xabagta PVC waxaa lagu helay centrifugation iyo qalajin, waxaana laga soo qaaday muunad si loo falanqeeyo.
2. 4 hababka falanqaynta
Marka loo eego hababka tijaabada ee ku habboon heerka ganacsiga, nambarka viscosity, cufnaanta muuqata, walxaha kacsan (oo ay ku jiraan biyaha) iyo nuugista balaastiigga ee 100 g resin PVC ee resin PVC dhammeeyey ayaa la tijaabiyay oo la falanqeeyay; Celceliska cabbirka qayb ka mid ah xabagta PVC waa la tijaabiyay; morphology ee qaybaha xabagta PVC ayaa lagu arkay iyadoo la isticmaalayo mikroskoob elektaroonik ah.
3 Natiijooyin iyo Dood
3. 1 Falanqaynta isbarbardhigga tayada qaybaha kala duwan ee resin PVC ee polymerization-ka yar
Riix 2. Sida ku cad habka tijaabada ee lagu sifeeyay 4, qayb kasta oo ah xabagta PVC ee la dhammeeyey ayaa la tijaabiyay, natiijaduna waxay ku caddahay shaxda 2.
Shaxda 2 natiijooyinka dufcadaha kala duwan ee imtixaanada yaryar
| Dufcaddii | Hydroxypropyl methylcellulose | Cufnaanta muuqata/(g/ml) | Celceliska cabbirka walxaha/μm | Viscosity/ (ml/g) | Nuugista balaastiigga ee 100 g PVC resin/g | Wax aan isbedelayn/% |
| 1# | Soo dejinta | 0.36 | 180 | 196 | 42 | 0.16 |
| 2# | Soo dejinta | 0.36 | 175 | 196 | 42 | 0.20 |
| 3# | Soo dejinta | 0.36 | 182 | 195 | 43 | 0.20 |
| 4# | Gudaha | 0.37 | 165 | 194 | 41 | 0.08 |
| 5# | Gudaha | 0.38 | 164 | 194 | 41 | 0.24 |
| 6# | Gudaha | 0.36 | 167 | 194 | 43 | 0.22 |
Waxaa laga arki karaa shaxda 2: Cufnaanta muuqata, lambarka viscosity iyo nuugista balaastikada ee xajinta PVC ee la helay ayaa aad u dhow iyadoo la isticmaalayo cellulose kala duwan oo tijaabo yar ah; sheyga xabagta ah ee lagu helo iyadoo la isticmaalayo qaaciidada hydroxypropyl methylcellulose ee gudaha Celcelis ahaan cabbirka walxaha wax yar ayaa ka yar.
Jaantuska 1 wuxuu muujinayaa sawirada SEM ee alaabta xabagta PVC ee la helay iyadoo la adeegsanayo hydroxypropyl methylcellulose kala duwan.
(1)—Hydroxypropyl methylcellulose oo dibadda laga keeno
(2) -Hydroxypropyl methylcellulose gudaha ah
Sawirka 1 SEM of resins oo lagu soo saaray 10-L polymerizer iyadoo ay joogaan hydroxypropyl methyl cellulose kala duwan
Waxaa laga arki karaa Jaantuska 1 in dhismayaasha dusha sare ee qaybaha resin PVC ee ay soo saaraan kala-firdhinta cellulose kala duwan ay isku mid yihiin.
Marka la soo koobo, waxaa la arki karaa in hydroxypropyl methylcellulose ee gudaha ee lagu tijaabiyay warqadan ay leedahay suurtagalnimada beddelka hydroxypropyl methylcellulose ee dibadda laga keeno.
3. 2 Falanqaynta isbarbardhigga tayada xuubka PVC oo leh shahaadada polymerization sare ee imtixaanka wax soo saarka
Sababtoo ah qiimaha sare iyo khatarta tijaabada wax soo saarka, nidaamka beddelka dhamaystiran ee tijaabada yar si toos ah looma adeegsan karo, sidaas darteed qorshuhu waa in si tartiib tartiib ah loo kordhiyo saamiga hydroxypropyl methylcellulose gudaha ee caanaha. Natiijooyinka tijaabada dufcad kasta waxa lagu muujiyey shaxda 3 ee la muujiyey.
Shaxda 3 Natiijooyinka tijaabada ee dufcadaha wax soo saarka ee kala duwan
| Dufcaddii | m (Shiinaha hydroxypropyl methyl cellulose): m (Hydroxypropyl methyl cellulose laga keeno) | Cufnaanta muuqata/(g/ml) | Nambarka viscosity/(ml/g) | Nuugista balaastiigga ee 100 g PVC resin/g | Wax aan isbedelayn/% |
| 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 |
Waxaa laga arki karaa shaxda 3 in isticmaalka guriga hydroxypropyl methyl cellulose uu si tartiib tartiib ah u kordhay ilaa inta gudaha hydroxypropyl methyl cellulose uu si buuxda u bedelayo hydroxypropyl methyl cellulose ee dibadda laga keeno. Tilmaamayaasha ugu muhiimsan sida nuugista balaastikada iyo cufnaanta muuqata si weyn uma isbeddelin, taas oo muujinaysa in hydroxypropyl methylcellulose gudaha ee lagu doortay warqadan ay bedeli karto hydroxypropyl methylcellulose soo dejinta.
4 Gabagabo
Tijaabada hydroxypropyl methyl cellulose ee guriga ee 10 L qalab yar oo tijaabo ah ayaa muujinaysa in ay leedahay suurtogalnimada lagu beddeli karo hydroxypropyl methyl cellulose; Natiijooyinka tijaabada beddelka wax-soo-saarka ayaa muujinaya in hydroxypropyl methyl cellulose ee gudaha loo isticmaalo wax soo saarka xabagta PVC, tilmaamayaasha tayada ugu muhiimsan ee xabagta PVC ee dhammaatay iyo hydroxypropyl methyl cellulose ee dibedda laga keeno ma laha farqi weyn. Waqtigan xaadirka ah, qiimaha cellulose-ka gudaha ee suuqa ayaa ka hooseeya kan cellulose-ka dibedda laga keeno. Sidaa darteed, haddii cellulose gudaha loo isticmaalo wax soo saarka, qiimaha qalabka wax soo saarka si weyn ayaa loo dhimi karaa.
Waqtiga boostada: Nov-04-2022