Is PVC Thermoplastic?
PVC (i-polyvinyl chloride) yinto ye-thermoplastic.
I-Thermoplastics luhlobo lwepolymer enokuthi inyibilikiswe kwaye iphinde ibunjwe izihlandlo ezininzi ngaphandle kokwenza naluphi na utshintsho olubalulekileyo lweekhemikhali. PVC yi ipolymer thermoplastic esetyenziswa ngokubanzi kwizicelo ezahlukeneyo ngenxa yeempawu zayo ezizodwa ezifana nokuqina, ukuguquguquka, kunye nokumelana nemichiza kunye nemozulu.
PVC iveliswa ngepolymerizing vinyl chloride monomer (VCM) ngenkqubo ebizwa ngokuba yi-suspension polymerization. Iziphumo zepolymer zingumgubo omhlophe onokucutshungulwa kwiindlela ezahlukeneyo ezifana nemibhobho, amaphepha, iifilimu kunye neeprofayili.
Enye yeenzuzo eziphambili ze PVC njengesixhobo se-thermoplastic kukukwazi ukusetyenzwa ngokulula ngeendlela ezahlukeneyo ezinje nge-extrusion, isitofu sokubumba, kunye nokubumba ukuvuthela. Oku kuyenza ibe lukhetho oludumileyo kuluhlu olubanzi lwezicelo ezinje ngokwakhiwa, iimoto, ukupakishwa, kunye nezixhobo zonyango.
Ukongeza kwiipropati zayo ze-thermoplastic, PVC ikwanazo neempawu ezizodwa eziyenza icace kwezinye i-thermoplastics. Umzekelo, PVC ngokwemvelo i-flame retardant, eyenza ibe lukhetho oludumileyo kwizicelo apho ukhuseleko lomlilo luyinkxalabo. PVC iyakwazi ukumelana nemitha ye-UV, eyenza ukuba ifaneleke kwizicelo zangaphandle.
Nangona kunjalo, kubalulekile ukuba uqaphele ukuba PVC Ikwanazo neenkxalabo zokusingqongileyo ezinxulumene nemveliso kunye nokulahlwa kwayo. Imveliso ye PVC ibandakanya ukusetyenziswa kwemichiza eyityhefu efana neVCM, enokuba nefuthe elibi kwimpilo yabantu kunye nokusingqongileyo. Ukongeza, PVC ayiboli kwaye iyakwazi ukuqhubeka nokusingqongileyo ixesha elide emva kokulahlwa.
Ukuququmbela, PVC yimathiriyeli ye-thermoplastic esetyenziswa ngokubanzi kwizicelo ezahlukeneyo ngenxa yeempawu zayo ezizodwa ezifana nokuqina, ukuguquguquka, kunye nokuchasana neekhemikhali kunye nemozulu. Ngelixa inezinto ezixhalabisayo zokusingqongileyo ezinxulumene nemveliso kunye nokulahlwa kwayo, ihlala ilukhetho oludumileyo kumashishini amaninzi ngenxa yokuguquguquka kwayo kunye nokulula ukusetyenzwa kwayo.
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