Is PVC Thermoplastic?
PVC (polyvinyl chloride) ndi zinthu zopangira thermoplastic.
Thermoplastics ndi mtundu wa polima womwe umatha kusungunuka ndikuwumbidwanso kangapo popanda kusintha kwambiri mankhwala. PVC ndi polima thermoplastic zomwe zimagwiritsidwa ntchito kwambiri pazinthu zosiyanasiyana chifukwa cha mawonekedwe ake apadera monga kukhazikika, kusinthasintha, ndi kukana mankhwala ndi nyengo.
PVC imapangidwa ndi polymerizing vinyl chloride monomer (VCM) kudzera mu njira yotchedwa kuyimitsidwa polymerization. Chotsatira polima ndi ufa woyera umene ukhoza kukonzedwa m'njira zosiyanasiyana monga mapaipi, mapepala, mafilimu, ndi mbiri.
Mmodzi wa makiyi ubwino wa PVC monga thermoplastic material ndi kuthekera kwake kukonzedwa mosavuta kudzera mu njira zosiyanasiyana monga extrusion, jekeseni akamaumba, ndi kuwomba akamaumba. Izi zimapangitsa kukhala chisankho chodziwika bwino pamagwiritsidwe osiyanasiyana monga zomangamanga, magalimoto, kulongedza, ndi zida zamankhwala.
Kuphatikiza pa mawonekedwe ake a thermoplastic, PVC ilinso ndi mawonekedwe apadera omwe amawapangitsa kukhala osiyana ndi ma thermoplastics ena. Mwachitsanzo, PVC ndi chilengedwe choletsa moto, zomwe zimapangitsa kukhala chisankho chodziwika bwino pamapulogalamu omwe chitetezo chamoto chimakhala chodetsa nkhawa. PVC imalimbananso ndi cheza cha UV, chomwe chimapangitsa kuti ikhale yoyenera kugwiritsidwa ntchito panja.
Komabe, nkofunika kuzindikira kuti PVC ilinso ndi zovuta za chilengedwe zokhudzana ndi kupanga ndi kutaya kwake. Kupanga kwa PVC kumakhudza kugwiritsa ntchito mankhwala oopsa monga VCM, omwe amatha kuwononga thanzi la anthu komanso chilengedwe. Kuonjezera apo, PVC si biodegradable ndipo akhoza kukhalabe mu chilengedwe kwa nthawi yaitali atataya.
Pomaliza, PVC ndi zinthu za thermoplastic zomwe zimagwiritsidwa ntchito kwambiri pazinthu zosiyanasiyana chifukwa cha mawonekedwe ake apadera monga kulimba, kusinthasintha, komanso kukana mankhwala ndi nyengo. Ngakhale ili ndi zovuta zina zokhudzana ndi chilengedwe chokhudzana ndi kupanga ndi kutaya kwake, imakhalabe chisankho chodziwika bwino m'mafakitale ambiri chifukwa cha kusinthasintha kwake komanso kuphweka kwake.
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