Is PVC I-Thermoplastic?
PVC (i-polyvinyl chloride) iyimpahla ye-thermoplastic.
I-Thermoplastics iwuhlobo lwe-polymer olungancibilika futhi lubunjwe kabusha izikhathi eziningi ngaphandle koshintsho olukhulu lwamakhemikhali. PVC is a I-polymer ye-thermoplastic esetshenziswa kakhulu ezinhlelweni ezahlukahlukene ngenxa yezakhiwo zayo eziyingqayizivele njengokuqina, ukuguquguquka, nokumelana namakhemikhali kanye nesimo sezulu.
PVC ikhiqizwa nge-polymerizing vinyl chloride monomer (VCM) ngenqubo ebizwa ngokuthi i-suspension polymerization. I-polymer ewumphumela iyimpushana emhlophe engacutshungulwa ibe yizinhlobo ezahlukahlukene njengamapayipi, amashidi, amafilimu, namaphrofayili.
Enye yezinzuzo ezibalulekile ze PVC njengempahla ye-thermoplastic yikhono layo lokucutshungulwa kalula ngamasu ahlukahlukene njenge-extrusion, ukubumba umjovo, nokubunjwa kwe-blow. Lokhu kukwenza kube ukukhetha okudumile ezinhlobonhlobo zezinhlelo zokusebenza ezinjengokwakha, izimoto, ukupakisha, kanye nemishini yezokwelapha.
Ngaphezu kwezakhiwo zayo ze-thermoplastic, PVC futhi inezici eziyingqayizivele eziyenza ihluke kwamanye ama-thermoplastics. Ngokwesibonelo, PVC i-retardant ngokwemvelo, okwenza kube ukukhetha okudumile kwezinhlelo zokusebenza lapho ukuphepha komlilo kuwukukhathazeka. PVC futhi imelana nemisebe ye-UV, eyenza ifanelekele ukusetshenziswa kwangaphandle.
Nokho, kubalulekile ukuqaphela lokho PVC futhi inokukhathazeka kwemvelo okuhlobene nokukhiqizwa nokulahlwa kwayo. Ukukhiqizwa kwe PVC kuhilela ukusetshenziswa kwamakhemikhali anobuthi njenge-VCM, okungaba nomthelela omubi empilweni yabantu nasendaweni ezungezile. Ngaphezu kwalokho, PVC ayiboli futhi ingaqhubeka endaweni isikhathi eside ngemva kokulahlwa.
Ekuphetheni, PVC i-thermoplastic material esetshenziswa kakhulu ekusetshenzisweni okuhlukahlukene ngenxa yezakhiwo zayo eziyingqayizivele njengokuqina, ukuguquguquka, nokumelana namakhemikhali kanye nesimo sezulu. Yize inokukhathazeka ngemvelo okuhambisana nokukhiqizwa nokulahlwa kwayo, isalokhu iyisinqumo esidumile ezimbonini eziningi ngenxa yokuguquguquka kwayo kanye nokucutshungulwa kalula kwayo.
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