Abstract: Ukusetyenziswa kwasekhayaihydroxypropyl 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 resins ibhekisela kwi-resin ye-PVC ene-avareji yesidanga se-polymerization engaphezulu kwe-1,700 okanye kunye nesakhiwo esinqamlezileyo esinqamlekileyo phakathi kweeamolekyu, phakathi kwazo ezona zixhaphakileyo zi-resin ze-PVC ezinomlinganiselo we-polymerization ye-2,500 [1]. 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 ingasetyenziswa kwiintambo zokutywina zemoto, iingcingo kunye neentambo, iikhathetha zonyango, njl. [2].
Indlela yokuvelisa i-PVC enezinga eliphezulu le-polymerization ikakhulu i-polymerization yokumiswa [3-4]. 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 ezisetyenziswa ngokuqhelekileyo zokusasazwa ziinkqubo zotywala ze-polyvinyl kunye ne-hydroxypropyl methylcellulose kunye ne-polyvinyl alcohol composite dispersion systems, kwaye abavelisi basekhaya basebenzisa le yokugqibela [5].
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.
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% |
| I-Bis (2-ethylhexyl peroxydicarbonate) | Iqhezu lobunzima [ (45 ~ 50) ± 1] % |
2. 2 Indlela yokuvavanya
Kwisixhobo sovavanyo esincinci se-10 L, sebenzisa i-hydroxypropyl methyl cellulose ephuma kumazwe angaphandle ukwenza iimvavanyo ze-benchmark ukufumanisa ifomyula esisiseko yovavanyo oluncinci; sebenzisa i-hydroxypropyl methyl cellulose yasekhaya endaweni ye-hydroxypropyl methyl cellulose yokuvavanya; Iimveliso ze-PVC ze-resin eziveliswe yi-hydroxypropyl methyl cellulose zathelekiswa kuphononongo lokwenzeka kokutshintshwa kwe-hydroxypropyl methyl cellulose yasekhaya. 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 isiciko seketile, vacuumze 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 i-reaction pressure yehla kuxinzelelo oluchazwe kwifomyula, yongeza i-arhente yokuphelisa kunye ne-arhente yokukhupha amagwebu, kwaye ukhuphe Imveliso egqityiweyo ye-resin ye-PVC yafunyanwa nge-centrifugation kunye nokomisa, kwaye isampuli ukuhlalutya.
2. 4 iindlela zokuhlalutya
Ngokweendlela zovavanyo ezifanelekileyo kumgangatho weshishini Q31/0116000823C002-2018, inombolo ye-viscosity, ingxinano ebonakalayo, into eguqukayo (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 | I-Hydroxypropyl methyl cellulose | 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. Ke ngoko, iskimu sokwandisa kancinci kancinci umlinganiselo we-hydroxypropyl methylcellulose yasekhaya kwifomula yamkelwa. Iziphumo zovavanyo zebhetshi nganye zibonisiwe kwiThebhile 3. ibonisiwe.
Uluhlu 3 Iziphumo zovavanyo lweebhetshi ezahlukeneyo zemveliso
| Iqela | M (i-hydroxypropyl methyl cellulose yasekhaya): M (ifakwe ngaphandle i-hydroxypropyl 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 methylcellulose yasekhaya kuye kwanyuswa kancinci kancinci de zonke iibhetshi zasekhaya ze-hydroxypropyl methylcellulose zithathe indawo ye-hydroxypropyl methylcellulose. 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 lwasekhayai-hydroxypropyl methyl cellulosekwisixhobo sovavanyo esincinci se-10 L sibonisa ukuba sinokuthatha indawo ye-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 zingancitshiswa kakhulu.
Ixesha lokuposa: Apr-25-2024