Zvese zvaunoda kuziva nezvePVC PURCA

Polyvinyl chloride (PVC) ndeimwe yeanonyanya kushandiswa iyo thermoplastic polymers pasi rese (mushure memamwe maPlassics yakashandiswa zvakanyanya sechipfuyo yakadai sePET uye PP). Icho chena chena uye chakanyanya brittle (pamberi petaipi dzinowedzerwa) plastiki. PVC ine nhoroondo refu kupfuura mazhinji emapurasitiki, kuve wekutanga synthesised muna 1872 uye kutengeserana inogadzirwa neiyo bf yakanaka kambani muma1920s. Mukupesana, mamwe akawanda mapurasitiki aive ekutanga akanyorwa uye anotengeswa anoshanda chete kuma1940 uye 50s. Kunyanya kushandiswa muindasitiri yekuvaka, inoshandiswawo mune signage, hutano hwehutano uye sedzimba dzezvipfeko. PVC yakawanikwa netsaona kaviri, kamwe muna 1832 neFrench chemist Henri Victor Regnault, uyezve zvakare rakatsvuka muna 1872 neGerman anonzi Eugene Baumann.

Fomu yekutanga uye basa rePolyvinyl chloride (PVC)
PVC inogadzirwa mumhando mbiri general: yakaomeswa kana isina kurongwa polymer (RPVC kana UPVC) uye plastiki inochinja. Mufomu rayo rekutanga, PVC inoonekwa neyakaomarara asi brittle chimiro. Nepo shanduro dzakasarudzika dzine akasiyana mashandisiro ezvishandisiridzo akawanda, rigid PVC zvakare ine mashandisiro ayo. Maindasitiri akadai sekurapwa kwemvura, kurwadziswa uye kurima kunogona kushandisa kuomarara pvc kwemabasa mazhinji.


Inochinjika, yakarongedzwa kana pachena PVC inodakadza uye inokonzeresa kupfuura iyo UPVC nekuda kwekuwedzera kweplasticzer yakadai seDiisononyl phthalate kana dinp. PVC inochinja inowanzo shandiswa mukuvaka sekusimbirira kwemawaya emagetsi, kana kuti pasi pedzimba dzine dzimba, zvipatara, zvikoro uye dzimwe nzvimbo dzenzvimbo dzisina kunaka chinhu chakakosha. Mune zvimwe zviitiko, PVC inogona kutsiva inoshanda yerabha. Rigid PVC inoshandiswawo sekuputira pombi uye kutsigira uye kunowanzonzi "vinyl" muUS. PVC PIPE inowanzonzi ne "chirongwa" chayo. Misiyano isina kujairika pakati pezvirongwa zvinosanganisira madziro tsizenti, kudzvinyirira ratidziro, uye ruvara, pakati pevamwe.