PVC yas yog dab tsi?

PVC yas hais txog kev sib xyaw PVC hauv kev lag luam tshuaj.Lub npe lus Askiv: polyvinyl chloride, lus Askiv lub npe: PVC.Qhov no yog lub ntsiab lus dav siv ntawm PVC.

Nws cov xim ntuj yog yellowish translucent thiab ci iab.Lub pob tshab yog zoo dua li ntawm polyethylene thiab polypropylene, thiab phem dua li ntawm polystyrene.Nyob ntawm seb tus nqi ntawm cov khoom siv ntxiv, nws tuaj yeem muab faib ua mos thiab tawv PVC.Cov khoom muag muag yog mos thiab tawv, thiab xav tias nplaum.Lub hardness ntawm cov khoom tawv yog siab dua li cov polyethylene tsawg, tab sis qis dua li ntawm polypropylene, thiab yuav muaj albinism ntawm qhov khoov.Cov khoom siv: daim hlau, cov kav dej, cov thom khwm, cov khoom ua si, qhov rooj thiab qhov rais, hlau tawv, ntawv sau, thiab lwm yam Nws yog ib hom khoom siv polymer uas siv cov tshuaj chlorine atom los hloov cov hydrogen atom hauv polyethylene.

Khiav thiab rooj vag: txhua lub rooj vag zoo tuaj yeem siv tau.Yog tias ua cov khoom me me, nws yog qhov zoo tshaj plaws los siv rab koob hom rooj vag los yog lub rooj vag submerged;Rau cov tuab tuab, nws yog qhov zoo tshaj plaws los siv cov kiv cua zoo li lub rooj vag.Qhov tsawg kawg nkaus txoj kab uas hla ntawm koob hom rooj vag los yog submerged rooj vag yuav tsum yog 1 hli;Lub thickness ntawm kiv cua zoo li lub rooj vag yuav tsum tsis pub tsawg tshaj 1 hli.

Kev siv cov khoom siv: cov kav dej, cov kav dej hauv tsev, cov phab ntsa hauv tsev, cov tshuab ua lag luam, cov khoom siv hluav taws xob, cov khoom siv kho mob, ntim khoom noj, thiab lwm yam.

Cov khoom siv tshuaj lom neeg thiab lub cev ntawm PVC tawv PVC yog ib qho ntawm cov khoom siv dav siv ntau tshaj plaws.Cov khoom siv PVC yog cov khoom siv amorphous.Stabilizers, lubricants, auxiliary processing agents, pigments, reinforcing agents thiab lwm yam additives feem ntau ntxiv rau PVC cov ntaub ntawv hauv kev siv.

Cov khoom siv PVC tsis muaj nplaim taws, siab zog, huab cua tsis kam thiab zoo heev geometric stability.PVC muaj zog tiv thaiv oxidants, reductants thiab muaj zog acids.Txawm li cas los xij, nws tuaj yeem raug corroded los ntawm cov concentrated oxidizing acids xws li concentrated sulfuric acid thiab concentrated nitric acid, thiab nws tsis haum rau lub sij hawm nyob rau hauv kev sib cuag nrog aromatic hydrocarbons thiab chlorinated hydrocarbons.

Lub melting kub ntawm PVC thaum lub sij hawm ua yog ib tug txheej txheem tseem ceeb heev parameter.Yog tias qhov ntsuas no tsis tsim nyog, nws yuav ua rau muaj teeb meem ntawm cov khoom decomposition.Cov yam ntxwv ntws ntawm PVC yog qhov tsis zoo, thiab nws cov txheej txheem yog nqaim heev.Tshwj xeeb, cov ntaub ntawv PVC nrog qhov hnyav molecular hnyav dua yog qhov nyuaj rau kev ua haujlwm (cov khoom no feem ntau yuav tsum tau ntxiv cov roj nplua nyeem los txhim kho cov yam ntxwv ntws), yog li cov ntaub ntawv PVC nrog qhov hnyav molecular feem ntau yog siv.Lub shrinkage ntawm PVC yog tsawg heev, feem ntau 0.2 ~ 0.6%.