Amagama angundoqo: i-hydroxypropyl methyl cellulose; iPVC eneqondo eliphezulu lepolymerization; umfuniselo omncinci; i-polymerization ukwenziwa kwasekhaya.
Ukusetyenziswa kweTshayina ihydroxypropyl methylcelluloseendaweni yokungenisa enye kwimveliso yePVC eneqondo eliphezulu lepolymerization yaziswa. Iziphumo zeentlobo ezimbini ze-hydroxypropyl methylcellulose kwiipropati ze-PVC ezinezinga eliphezulu le-polymerization zaphandwa. Iziphumo zabonisa ukuba kwakunokwenzeka ukufaka endaweni ye-hydroxypropyl methyl cellulose endaweni yangaphandle.
I-high-degree-of-polymerization ye-PVC i-resins ibhekisela kwii-resin ze-PVC ezinomlinganiselo ophakathi we-polymerization engaphezulu kwe-1,700 okanye isakhiwo esidityaniswe kancinci phakathi kweeamolekyu. Xa kuthelekiswa nentlaka eqhelekileyo yePVC, i-polymerization ephezulu yePVC inokuqina okuphezulu, iseti encinci yoxinzelelo, ukumelana nobushushu obuhle, ukuxhathisa ukwaluphala, ukuxhathisa ukudinwa kunye nokumelana nokunxiba. Yeyona ndawo ifanelekileyo yerabha kwaye ingasetyenziselwa imicu yokutywina yemoto, ucingo kunye nentambo, iicatheter zonyango, njl.
Indlela yokuvelisa yePVC kunye neqondo eliphezulu lokupolymerization ikakhulu ukumiswa kwepolymerization. Kwimveliso yendlela yokunqunyanyiswa, i-dispersant yi-agent encedisayo ebalulekileyo, kwaye uhlobo lwayo kunye nenani liya kuchaphazela ngokuthe ngqo i-particle shape, i-particle size distribution, kunye ne-plasticizer absorption ye-resin ye-PVC egqityiweyo. Iinkqubo zokusasazwa okuxhaphakileyo zizixokelelwano zotywala ze-polyvinyl kunye ne-hydroxypropyl methylcellulose kunye ne-polyvinyl alcohol composite system composite, kwaye abavelisi basekhaya basebenzisa kakhulu le yokugqibela.
1 Iimathiriyeli ekrwada eziphambili kunye neenkcukacha
Izinto eziphambili kunye neenkcukacha ezisetyenzisiweyo kuvavanyo ziboniswe kwiThebhile 1. Ingabonwa kwiThebhile 1 ukuba i-hydroxypropyl methylcellulose yasekhaya ekhethiweyo kweli phepha ihambelana ne-hydroxypropyl methylcellulose ethunyelwa ngaphandle, enika imfuneko yovavanyo lokutshintshwa kweli phepha. iphepha.
2 Umxholo wovavanyo
2. 1 Ukulungiswa kwesisombululo se-hydroxypropyl methylcellulose
Thatha umlinganiselo othile wamanzi ahlanjululweyo, uyibeke kwisitya kwaye uyitshise ukuya kuma-70 ° C, kwaye ngokuthe ngcembe wongeze i-hydroxypropyl methylcellulose phantsi kokuvuselela rhoqo. Iselulosi idada emanzini ekuqaleni, ize emva koko isasazwe ngokuthe ngcembe de idityaniswe ngokulinganayo. Pholisa isisombululo kwivolumu.
Itheyibhile 1 Iimathiriyeli eziphambili kunye neenkcukacha zazo
| Igama lempahla ekrwada | Inkcazo |
| Vinyl chloride monoma | Inqaku lomgangatho≥99. 98% |
| Amanzi anetyuwa | Ukuqhuba≤10. 0 μs / cm, ixabiso pH 5. 00 ukuya 9. 00 |
| Polyvinyl utywala A | Isidanga sotywala 78. 5% ukuya kuma-81. 5%, umxholo wothuthu≤0. I-5%, umcimbi oguquguqukayo≤5. 0% |
| Polyvinyl utywala B | Isidanga sotywala 71. 0% ukuya ku-73. I-5%, i-viscosity 4. 5 ukuya ku-6. I-5mPa s, i-volatile matter≤5. 0% |
| Polyvinyl utywala C | Isidanga sotywala 54. 0% ukuya ku-57. 0% , viscosity 800 ~ 1 400mPa s, umxholo oqinileyo 39. 5% ukuya kuma-40.5% |
| I-hydroxypropyl methylcellulose A | Viscosity 40 ~ 60 mPa s, methoxyl mass fraction 28% ~ 30%, hydroxypropyl mass fraction 7% ~ 12%, ukufuma≤5. 0% |
| Ihydroxypropyl methylcellulose B yasekhaya | Viscosity 40 ~ 60 mPa · s, methoxyl mass fraction 28% ~ 30%, hydroxypropyl mass fraction 7% ~ 12%, ukufuma ≤5. 0% |
| Bis(2-ethyl peroxydicarbonate) hexyl ester) | Iqhezu lobunzima [( 45 ~ 50) ± 1]% |
2. 2 Indlela yokuvavanya
Kwisixhobo sovavanyo esincinci se-10 L, sebenzisa i-hydroxypropyl methylcellulose ephuma kumazwe angaphandle ukwenza iimvavanyo ze-benchmark ukufumanisa ifomyula eyisiseko yovavanyo oluncinci; sebenzisa i-hydroxypropyl methylcellulose yasekhaya ukuze ithathe indawo ye-hydroxypropyl methylcellulose ethunyelwa ngaphandle ukuze ivavanywe; Iimveliso ze-PVC ze-resin eziveliswe yi-hydroxypropyl methylcellulose zathelekiswa, kunye nokuba nokwenzeka kokutshintsha i-hydroxypropyl methylcellulose yasekhaya yafundwa. Ngokweziphumo zovavanyo oluncinci, uvavanyo lwemveliso luyenziwa.
2. 3 Amanyathelo ovavanyo
Ngaphambi kokuphendula, hlambulula i-kettle ye-polymerization, vala i-valve ephantsi, yongeza inani elithile lamanzi ahlambulukileyo, uze ungeze i-dispersant; vala i-kettle cover, ucoce emva kokuphumelela uvavanyo loxinzelelo lwe-nitrogen, uze ungeze i-vinyl chloride monomer; emva kokuvuselela okubandayo, yongeza umqalisi; Sebenzisa amanzi ajikelezayo ukunyusa ubushushu kwi-ketile ukuya kwiqondo lokushisa lokusabela, kwaye ungeze isisombululo se-ammonium bicarbonate ngexesha elifanelekileyo ngexesha lenkqubo yokulungelelanisa ixabiso le-pH yenkqubo yokusabela; xa uxinzelelo lwe-reaction lwehla kuxinzelelo oluchazwe kwifomula, yongeza i-terminator kunye ne-defoamer, kwaye ukhulule isisombululo. Imveliso egqityiweyo ye-resin ye-PVC yafunyanwa nge-centrifugation kunye nokomisa, kunye nesampuli ukuhlalutya.
2. 4 iindlela zokuhlalutya
Ngokweendlela zovavanyo ezifanelekileyo kumgangatho weshishini, inombolo ye-viscosity, ingxinano ebonakalayo, into eguquguqukayo (kubandakanywa namanzi) kunye nokufunxwa kweplastiki ye-100 g ye-PVC ye-resin egqityiweyo ye-PVC yavavanywa kwaye yahlalutywa; Umyinge we-particle ye-PVC resin yavavanywa; i-morphology yamasuntswana entlaka ye-PVC yabonwa kusetyenziswa imakroskopu ye-electron yokuskena.
3 Iziphumo kunye neNgxoxo
3. 1 Uhlalutyo lokuthelekisa umgangatho weebhetshi ezahlukeneyo zePVC resin kwipolymerization encinci encinci
Cinezela i-2. Ngokwendlela yokuvavanya echazwe kwi-4, ibhetshi nganye ye-resin ye-PVC egqityiweyo encinci yavavanywa, kwaye iziphumo ziboniswe kwiThebhile 2.
Iziphumo zeTheyibhile ezi-2 zeebhetshi ezahlukeneyo zovavanyo oluncinci
| Iqela | IHydroxypropyl methylcellulose | Uxinzelelo olubonakalayo/(g/mL) | I-avareji yobungakanani bamasuntswana/μm | Viscosity/(mL/g) | Ukufunxwa kwePlastiki ye-100 g ye-PVC resin / g | Umba oguqukayo/% |
| 1# | Ngenisa ngaphandle | 0.36 | 180 | 196 | 42 | 0.16 |
| 2# | Ngenisa ngaphandle | 0.36 | 175 | 196 | 42 | 0.20 |
| 3# | Ngenisa ngaphandle | 0.36 | 182 | 195 | 43 | 0.20 |
| 4# | Kwasekhaya | 0.37 | 165 | 194 | 41 | 0.08 |
| 5# | Kwasekhaya | 0.38 | 164 | 194 | 41 | 0.24 |
| 6# | Kwasekhaya | 0.36 | 167 | 194 | 43 | 0.22 |
Inokubonwa kwiThebhile 2: Ubuninzi obucacileyo, inombolo ye-viscosity kunye ne-plasticizer absorption ye-resin ye-PVC efunyenweyo isondele ngokusondeleyo ngokusebenzisa i-cellulose eyahlukeneyo yovavanyo oluncinci; imveliso ye-resin efunyenwe ngokusebenzisa ifomula yasekhaya ye-hydroxypropyl methylcellulose Umyinge wesayizi ye-particle incinci.
Umzobo we-1 ubonisa imifanekiso ye-SEM yeemveliso ze-resin ze-PVC ezifunyenwe ngokusebenzisa i-hydroxypropyl methylcellulose eyahlukileyo.
(1)—I-hydroxypropyl methylcellulose ethunyelwa ngaphandle
(2)—I-hydroxypropyl methylcellulose yasekhaya
Ikhiwane. I-1 SEM yeeresin eziveliswe kwi-10-L ye-polymerizer phambi kobukho be-hydroxypropyl methyl cellulose eyahlukileyo
Inokubonwa kwi-Figure 1 ukuba izakhiwo ezingaphezulu zePVC ze-resin particles eziveliswa yi-cellulose dispersants ezahlukeneyo zifana.
Ukushwankathela, kunokubonwa ukuba i-hydroxypropyl methylcellulose yasekhaya evavanyiweyo kweli phepha inokukwazi ukubuyisela i-hydroxypropyl methylcellulose evela ngaphandle.
3. 2 Uhlalutyo oluthelekisayo lomgangatho we-PVC resin ene-polymerization degree ephezulu kuvavanyo lwemveliso
Ngenxa yeendleko eziphezulu kunye nomngcipheko wovavanyo lwemveliso, iskimu esipheleleyo sokutshintshwa kovavanyo oluncinci alunakusetyenziswa ngokuthe ngqo, ngoko ke isicwangciso kukunyusa ngokuthe ngcembe umlinganiselo we-hydroxypropyl methylcellulose yasekhaya kwifomula. Iziphumo zovavanyo zebhetshi nganye zibonisiwe kwiThebhile 3 ebonisiweyo.
Uluhlu 3 Iziphumo zovavanyo lweebhetshi ezahlukeneyo zemveliso
| Iqela | m (China hydroxypropyl methyl cellulose): m (engeniswe ngaphandle ihydroxypropyl methyl cellulose) | Uxinzelelo olubonakalayo/(g/mL) | Inombolo yeViscosity/(mL/g) | Ukufunxwa kwePlastiki ye-100 g ye-PVC resin / g | Umba oguqukayo/% |
| 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 |
Inokubonwa kwiTheyibhile 3 ukuba ukusetyenziswa kwe-hydroxypropyl methyl cellulose yasekhaya yonyuka kancinane de i-hydroxypropyl methyl cellulose yasekhaya ithathe indawo ye-hydroxypropyl methyl cellulose. Iimpawu eziphambili ezifana ne-plasticizer absorption kunye noxinaniso olubonakalayo aluzange luguquguquke kakhulu, lubonisa ukuba i-hydroxypropyl methylcellulose yasekhaya ekhethiweyo kweli phepha ingathatha indawo ye-hydroxypropyl methylcellulose evela kumazwe angaphandle kwimveliso.
4 Isiphelo
Uvavanyo lwe-hydroxypropyl methyl cellulose yasekhaya kwisixhobo sovavanyo esincinci se-10 L lubonisa ukuba luyakwazi ukubuyisela i-hydroxypropyl methyl cellulose; iziphumo zovavanyo endaweni yemveliso zibonisa ukuba i-hydroxypropyl methyl cellulose yasekhaya isetyenziselwa ukuveliswa kwe-resin ye-PVC, iimpawu eziphambili zomgangatho we-resin ye-PVC egqityiweyo kunye ne-hydroxypropyl methyl cellulose engenamahluko omkhulu. Okwangoku, ixabiso le-cellulose yasekhaya kwiimarike liphantsi kunelo le-cellulose ethunyelwa ngaphandle. Ngoko ke, ukuba i-cellulose yasekhaya isetyenziselwa imveliso, iindleko zokuncedisa imveliso zinokuncitshiswa kakhulu.
Ixesha lokuposa: Nov-04-2022