Nta 1: PVC ruaj khov yog ib qho ntawm cov khoom siv yas siv dav tshaj plaws. Cov khoom siv PVC yog cov khoom siv tsis-crystalline.

Nta 2: Cov khoom ruaj khov, cov roj nplua nyeem, cov neeg sawv cev ua haujlwm pabcuam, cov xim, cov neeg sawv cev tiv thaiv kev cuam tshuam thiab lwm yam khoom ntxiv feem ntau ntxiv rau cov ntaub ntawv PVC hauv kev siv tiag tiag.

Feature 3: Cov khoom siv PVC muaj qhov tsis kub hnyiab, muaj zog siab, tiv taus huab cua thiab ruaj khov zoo heev.

Nta 4: PVC muaj zog tiv taus cov tshuaj oxidants, cov neeg sawv cev txo qis thiab cov kua qaub muaj zog. Txawm li cas los xij, nws tuaj yeem raug xeb los ntawm cov kua qaub oxidizing concentrated xws li concentrated sulfuric acid thiab concentrated nitric acid thiab tsis haum rau kev sib cuag nrog cov hydrocarbons aromatic thiab chlorinated hydrocarbons.

Nta 5: Qhov kub yaj ntawm PVC thaum lub sijhawm ua tiav yog qhov tseem ceeb heev rau cov txheej txheem. Yog tias qhov kev ntsuas no tsis raug, nws yuav ua rau muaj teeb meem ntawm cov khoom lwj.

Nta 6: Cov yam ntxwv ntawm PVC ntws tsis zoo, thiab nws cov txheej txheem yog nqaim heev. Tshwj xeeb tshaj yog cov khoom siv PVC siab molecular hnyav nyuaj rau ua (hom khoom no feem ntau yuav tsum ntxiv cov roj nplua nyeem kom txhim kho cov yam ntxwv ntws), yog li cov khoom siv PVC nrog qhov hnyav molecular me me feem ntau siv.

Nta 7: Tus nqi shrinkage ntawm PVC yog qis heev, feem ntau 0.2 ~ 0.6%.

Polyvinyl chloride, luv ua PVC (Polyvinyl chloride) hauv lus Askiv, yog vinyl chloride monomer (VCM) hauv peroxides, azo compounds thiab lwm yam initiators; lossis nyob rau hauv qhov kev ua ntawm lub teeb thiab cua sov raws li cov tshuaj tiv thaiv dawb radical polymerization. Polymers tsim los ntawm polymerization. Vinyl chloride homopolymer thiab vinyl chloride copolymer yog hu ua vinyl chloride resin.

PVC yog ib hom hmoov dawb uas muaj cov qauv tsis muaj zog. Qhov degree ntawm branching yog me me, qhov ceev ntawm qhov sib piv yog li 1.4, qhov kub hloov iav yog 77 ~ 90 ℃, thiab nws pib lwj thaum txog 170 ℃. Kev ruaj khov rau lub teeb thiab cua sov tsis zoo, siab tshaj 100 ℃ lossis tom qab ntev. Kev raug tshav ntuj yuav lwj los tsim hydrogen chloride, uas yuav ua rau lub decomposition ntxiv, ua rau muaj kev hloov pauv xim, thiab cov khoom siv lub cev thiab lub tshuab kuj yuav poob qis sai. Hauv kev siv tiag tiag, yuav tsum ntxiv cov stabilizers los txhim kho kev ruaj khov rau cua sov thiab lub teeb.

Qhov hnyav molecular ntawm PVC tsim tawm hauv kev lag luam feem ntau yog nyob rau hauv qhov ntau ntawm 50,000 txog 110,000, nrog rau qhov loj polydispersity, thiab qhov hnyav molecular nce nrog qhov txo qis ntawm qhov kub polymerization; nws tsis muaj qhov chaw melting ruaj khov, pib mos ntawm 80-85 ℃, thiab ua viscoelastic ntawm 130 ℃, 160 ~ 180 ℃ pib hloov mus rau hauv lub xeev kua viscous; nws muaj cov khoom siv kho tshuab zoo, lub zog tensile yog li 60MPa, lub zog cuam tshuam yog 5 ~ 10kJ / m2, thiab nws muaj cov khoom dielectric zoo heev.

PVC yog lub ntiaj teb cov khoom loj tshaj plaws ntawm cov yas dav dav, thiab nws tau siv dav. Nws tau siv dav hauv cov ntaub ntawv tsim kho, cov khoom lag luam, cov khoom siv niaj hnub, tawv hauv pem teb, vuas hauv pem teb, tawv cuav, yeeb nkab, xov hlau thiab cables, zaj duab xis ntim khoom, lub raj mis, cov ntaub ntawv ua npuas ncauj, cov ntaub ntawv kaw, fibers, thiab lwm yam.

Peb lub Hoobkas siv cov khoom zoopwmcov ntaub ntawv, xws li 718, 718H, thiab lwm yam, cov ntaub ntawv pwm zoo, lub neej ntev dua, thiab cov khoom siv hauv cov ntaub ntawv yas sib txawv tuaj yeem tsim cov khoom yas zoo