Polyvinyl chloride (pvc) ndi imodzi mwazomwe zimagwiritsidwa ntchito polima a thermoplastist ma polity (pafupi ndi ochepa okha omwe amagwiritsidwa ntchito kwambiri ngati chiweto ndi ma pp). Ndi loyera kwambiri komanso loyera kwambiri (zisanafike zowonjezera za mapulasitiki) pulasitiki. PVC yakhala ikuyenda nthawi yayitali kuposa ma pulasitiki ambiri omwe adayamba kuphatikizidwa mu 1872 ndi malonda omwe amapangidwa ndi BF Courtrich Kampani mu 1920s. Poyerekeza, mapulaneti ena ambiri wamba adayamba kuphatikizidwa ndikuyamba kugwiritsa ntchito malonda mu 1940s ndi 1950s. Amagwiritsidwa ntchito kwambiri m'makampani omanga koma amagwiritsidwanso ntchito pazizindikiro, mapulogalamu azaumoyo, komanso ngati chovala.
PVC imapangidwa m'mitundu iwiri, choyamba ngati polymer kapena polymer (rpvc kapena upvc), ndi chachiwiri ngati pulasitiki yosinthika. Kusinthasintha, pulasitiki kapena ma pvc kapena okhazikika ndi osavomerezeka kuposa kukhazikika chifukwa chowonjezera mapira okhala ngati Phtates (mwachitsanzo dinalate). Kusintha kwa PVX kumagwiritsidwa ntchito pomanga ngati makutu amagetsi kapena pansi panyumba, zipatala, masukulu, ndi madera ena pomwe m'malo mwake amakhala m'malo mwa mphira.
Rigid PVC imagwiritsidwanso ntchito pomanga ngati chitoliro cha mitengo yopendekera komanso yogawana mawu oti "vinyl" ku United States. PVC chitoliro nthawi zambiri chimatchulidwa ndi "dongosolo" la "mwachitsanzo, zinthu zinayi kapena zisinthe 80). Kusiyana kwakukulu pakati pa magawo kumaphatikizapo zinthu ngati khoma makulidwe, kutalika kwa kupanikizika, komanso mtundu.
Zina mwazithunzi zofunikira kwambiri za pvc zimaphatikizapo mtengo wake wotsika, kukana kwake chilengedwe (komanso kwa mankhwala ake ndi ma alkalies), kulimba kwambiri, komanso mphamvu yapamwamba, komanso yolimba kwambiri papulasitiki. Imapezeka kwambiri, yomwe nthawi zambiri imagwiritsidwa ntchito komanso yobwezeretsanso mosavuta (gulu lokhala ndi chizindikiritso cha Reson Reformation "3").
Post Nthawi: Feb-02-2021
