Polyvinyl chloride (PVC) yog ib qho polymer uas polymerized los ntawm vinyl chloride monomer (VCM) hauv peroxide, azo compound thiab lwm yam initiators lossis raws li cov dawb radical polymerization mechanism nyob rau hauv qhov kev ua ntawm lub teeb thiab cua sov. Vinyl chloride homopolymer thiab vinyl chloride copolymer yog hu ua vinyl chloride resin.
PVC yog ib lub yas siv dav dav tshaj plaws hauv ntiaj teb, thiab tau siv dav. Nws yog 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, cov fibers thiab lwm yam.
Raws li qhov sib txawv ntawm daim ntawv thov, PVC muaj peev xwm muab faib ua: cov khoom siv dav dav PVC resin, qib siab ntawm polymerization PVC resin thiab cross-linked PVC resin. Cov khoom siv dav dav PVC resin yog tsim los ntawm polymerization ntawm vinyl chloride monomer nyob rau hauv qhov kev ua ntawm initiator; qib siab polymerization PVC resin yog hais txog cov resin polymerized los ntawm kev ntxiv cov saw hlau loj hlob tus neeg sawv cev hauv vinyl chloride monomer polymerization system; Crosslinked PVC resin yog cov resin polymerized los ntawm kev ntxiv crosslinking tus neeg sawv cev uas muaj diene thiab polyene rau hauv vinyl chloride monomer polymerization system.
Raws li txoj kev tau txais vinyl chloride monomer, nws muaj peev xwm muab faib ua calcium carbide method, ethylene method thiab imported (EDC, VCM) monomer method (feem ntau, ethylene method thiab imported monomer method yog hu ua ethylene method).
Lub sijhawm tshaj tawm: Tsib Hlis-07-2022