Los ntawm kev qhia nws cov monomer copolymerization rau hauv cov saw tseem ceeb ntawm vinyl chloride, ib qho polymer tshiab uas muaj ob qhov sib txuas monomer, uas yog hu ua copolymer.Lub ntsiab ntau yam thiab cov khoom ntawm copolymer ntawm vinyl chloride thiab lwm yam monomers yog raws li nram no:
(1) vinyl chloride vinyl acetate copolymer: kev taw qhia ntawm vinyl acetate monomer tuaj yeem ua lub luag haujlwm ntawm cov yas yas, uas yog, hu ua "sab hauv plasticization", uas tuaj yeem zam qhov evaporation, tsiv teb tsaws, rho tawm thiab lwm yam tsis zoo ntawm cov yas yas. , thiab tseem tuaj yeem txo cov viscosity melting, txo qhov kub thiab txias thiab txhim kho kev ua haujlwm.Feem ntau, cov ntsiab lus ntawm vinyl acetate hauv copolymer yog 3 ~ 14%.
Lub ntsiab tsis zoo ntawm vinyl chloride vinyl acetate copolymer yog txo cov tensile zog, thermal deformation kub, hnav tsis kam, tshuaj stability thiab thermal stability.
⑵ vinyl chloride vinylidene chloride copolymer: lub plasticization, softening kub, solubility thiab intramolecular plasticization ntawm no copolymer yog yeej ib yam li cov yas chloride vinyl acetate copolymer.Nws yog tus cwj pwm los ntawm cov dej tsis tshua muaj thiab cov pa xa hluav taws xob, siab solubility hauv ketone cov kuab tshuaj, thiab tsis kam mus rau dilution ntawm aromatics, yog li nws tuaj yeem siv tau zoo hauv cov txheej txheem.Tsis tas li ntawd, nws kuj yog siv los ua shrink films.Vim tias cov cua sov tsis zoo thiab lub teeb ruaj khov piv nrog vinyl chloride vinyl acetate copolymer, thiab tus nqi siab monomer, nws tsis yog siv dav hauv vinyl chloride vinyl acetate.
(3) vinyl chloride acrylate copolymer: cov nyhuv plasticizing sab hauv ntawm cov copolymer yog sib npaug rau cov yas chloride vinyl acetate, nrog thermal stability.Nws tuaj yeem siv los tsim cov khoom siv tawv thiab muag, thiab txhim kho kev ua haujlwm, cuam tshuam tsis kam thiab txias ua haujlwm.Nws tseem tuaj yeem siv rau txheej, sib txuas, thiab lwm yam.
(4) vinyl chloride maleate copolymer: cov ntsiab lus ntawm maleate nyob rau hauv no copolymer yog hais txog 15%, thiab cov nyhuv plasticizing sab hauv zoo ib yam li cov yas chloride acrylate.Nws muaj kev ua tau zoo.Kev txo qis ntawm lub cev thiab cov khoom siv kho tshuab yog me me, thiab cov cua sov ua haujlwm siab dua li cov copolymers dav dav.
(5) vinyl chloride olefin copolymer: copolymerization ntawm ethylene, propylene thiab lwm yam olefin monomers tuaj yeem tsim cov copolymer resins nrog fluidity zoo heev, thermal stability, cuam tshuam tsis kam, pob tshab, kub tsis kam thiab lwm yam.
Folding blending tov kev hloov kho
Folding graft reactive polymerization
Kev hloov kho los ntawm kev qhia lwm cov monomers rau hauv cov saw hlau ntawm PVC lossis vinyl chloride saw rau sab saw ntawm heterogeneous polymers yog hu ua graft reactive polymerization.
4. Tsawg kub polymerization
Hloov cov kev sib txuas ntawm cov saw txuas hauv cov saw tseem ceeb ntawm PVC los yog hloov cov txheej txheem ntawm PVC chains txhais tau tias hloov cov txheej txheem polymerization.Qhov kev hloov kho no hu ua low-temperature polymerization.
Post lub sij hawm: Lub Xya hli ntuj-15-2022