Cov haujlwm ntawm cov khoom siv ua tiav PVC yog dab tsi?

1. Cov khoom siv ua PVC PA-20 thiab PA-40, raws li cov khoom ACR xa tuaj, yog siv dav hauv PVC zaj duab xis pob tshab, PVC daim ntawv, PVC cov khoom me me, PVC hoses thiab lwm yam khoom kom zoo dua qhov kev sib kis thiab kev ua haujlwm thermal ntawm PVC sib xyaw, qhov ci ntsa iab ntawm qhov chaw, txo cov khib nyiab, thiab daws cov teeb meem ntawm cov cim ntws thiab cov ntsiab lus siv lead ua uas feem ntau tshwm sim hauv kev tsim khoom.
Vim nws qhov hnyav molecular siab heev, PA-40 yog siv dav ua tus tswj kev ua npuas dej hauv PVC ua npuas ncauj, PVC ua npuas ncauj kav dej, thiab lwm yam khoom, ua rau muaj kev ua npuas dej sib xws thiab cov khoom zoo.
2. Kev hloov kho qhov cuam tshuam MBS Cov tshuaj MBS uas tiv taus qhov cuam tshuam feem ntau yog siv rau hauv PVC ua thiab tsim cov txheej txheem los txhim kho nws lub zog cuam tshuam yam tsis ua rau puas tsuaj rau cov yam ntxwv ntawm PVC. Vim nws cov yam ntxwv solubility zoo ib yam li PVC, ob qho tib si muaj kev sib raug zoo thermodynamic, uas muaj lub zog cuam tshuam siab, tiv taus kub, thiab cov xim ntawm PVC ntawm chav lossis qis kub. Kev hloov kho pob tshab MBS Cov tshuaj MBS pob tshab feem ntau yog siv rau hauv kev ua thiab tsim cov khoom lag luam PVC pob tshab, txhim kho lawv lub zog cuam tshuam yam tsis ua rau puas tsuaj rau cov yam ntxwv ntawm cov khoom lag luam PVC pob tshab. Nws cov ntsuas refractive zoo ib yam li PVC, thiab siv MBS ua tus hloov kho qhov cuam tshuam PVC yuav tsis cuam tshuam rau qhov pob tshab ntawm PVC. Nws yog cov khoom siv zoo tshaj plaws rau kev txhim kho kev tiv thaiv kev cuam tshuam PVC thiab tsim cov khoom lag luam pob tshab. Piv nrog rau lwm lub tuam txhab, peb MBS muaj kev tiv thaiv kev cuam tshuam siab dua, kev sib raug zoo zoo dua, thiab kev tiv thaiv hnav MBS enhancer BLD-81 (kev hloov kho qhov cuam tshuam, tsom mus rau cov kav dej PVC thiab cov khoom siv) yog siv los txhim kho lub zog thiab kev tiv thaiv huab cua ntawm cov khoom lag luam PVC profile.