PVC cob yog polar amorphous polymer, ntom ntom: 1. $ tus lej $ literal, iav hloov pauv kub: 87 Shan, yog li cov thermal stability tsis zoo, nyuaj rau txheej txheem. Tsis tuaj yeem siv ncaj qha, yuav tsum tau hloov kho sib xyaw, ntxiv cov tshuaj ntxiv thiab cov muab tshuaj ua ntej siv. Vim tias muaj ntau hom sib txawv thiab faib ua feem ntawm cov tshuaj ntxiv thiab cov txhaws, nws tau txiav txim siab tias cov khoom thiab cov tseev kom muaj ntawm cov khoom siv PVC uas tau npaj tseg tsis zoo ib yam. Peb feem ntau hu rau PVC cov mis, hais lus nruj me ntsis, PVC hloov pauv cov mis, thiab PVC tsuas yog tom qab hloov kho los siv. Pawg no feem ntau raug cais raws li cov ntaub ntawv hloov kho polymer. Kev hloov kho ntawm cov khoom siv polymer hloov pauv ib puag ncig qhov ua tau zoo ntawm cov yas dav dav, kev hloov pauv ntawm cov khoom siv ib leeg rau ntau yam khoom sib xyaw ua ke (hlau, sib xyaw, sib xyaw ua ke), ua haujlwm ntawm cov khoom siv, thiab ua kom zoo dua ntawm kev ua tau zoo thiab tus nqi. Txoj kev hloov kho feem ntau yog kev hloov tshuaj lom neeg, hloov pauv hloov pauv, txhim kho kev hloov pauv, sib xyaw ua ke thiab hloov kho nano-composite. Lub hauv paus ntsiab lus ntawm kev hloov kho yog muab cov khoom ua haujlwm lossis txhim kho qee yam khoom los ntawm kev ntxiv. Yog li ntawd, PVC txheej txheem thev naus laus zis, txiav txim siab cov txuj ci thiab peev txheej tsim khoom ntawm lub Hoobkas los sib tw.
PVC dav dav ua ntej txhawm rau hloov kho cov granulation, nrog cov ntsia hlau extruder los npaj cov khoom, yas ntau dua, ua kom yooj yim dua, tshwj xeeb tshaj yog cov txheej txheem yog txhaj tshuaj molding khoom. Ntsia hlau extruder yog ib qho ntawm cov cuab yeej tseem ceeb tshaj plaws hauv cov txheej txheem yas, uas yog tsim los ntawm kev thauj khoom, sib cog, yaj thiab yaj ntawm yas los ntawm kev hloov hluav taws xob sab nraud thiab hloov cua sov ntawm cov cua sov sab nraud. Ntsia hlau extruder Txawm hais tias yog lub tshuab yas granulation lossis tshuab ua cov tshuab siv txoj haujlwm tseem ceeb hais lus nruj me ntsis, nrog tshwj xeeb xav tau ntawm cov khoom lag luam PVC, PVC hloov pauv tus qauv, tau ua raws li cov neeg siv khoom xav tau. Muaj cov polymerization ntawm PVC hauv cov txheej txheem tsim khoom, xws li hloov pauv ntau yam muaj vinyl chloride copolymer, polyvinyl chloride sib xyaw thiab chlorinated polyvinyl chloride.
