Zida ziwirizi zimapangidwa ndi zinthu zomwezo, koma kuchuluka kwa zinthuzo n'kosiyana, dziko lopangidwa ndi lofewa kumbali imodzi ndi lolimba kumbali inayo.
Chikwama cha pulasitiki cha PVC
Mtundu wachilengedwe ndi wachikasu wowoneka bwino komanso wonyezimira.Transparency ndi bwino kuposa polyethylene ndi polypropylene, koma zochepa kuposa polystyrene.Kutengera kuchuluka kwa zowonjezera, zitha kugawidwa kukhala zofewa komanso zolimba za polyvinyl chloride.Zofewa zimakhala ndi kusinthasintha, kulimba komanso kumata.Kuuma kwa zinthu zolimba ndi za polyethylene yotsika kwambiri, koma ngati ili yotsika kuposa polypropylene, kuyera kumachitika pamapindikira.Mankhwala wamba: mbale, mapaipi, soles, zoseweretsa, zitseko ndi mazenera, m'chimake waya, zolembera, etc. Ndi polima zakuthupi kuti ntchito maatomu chlorine m'malo mwa maatomu haidrojeni mu polyethylene.
Chemical and Physical Properties of PVC (Polyvinyl Chloride) Hard PVC ndi imodzi mwazinthu zomwe zimagwiritsidwa ntchito kwambiri ndi pulasitiki.PVC ndi chinthu cha amorphous.Pogwiritsira ntchito zipangizo za PVC, zolimbitsa thupi, mafuta odzola, mankhwala othandizira, ma pigment, ma impactors ndi zina zowonjezera nthawi zambiri zimawonjezeredwa [2].
Zinthu za PVC ndizosayaka, zolimba, sizilimbana ndi nyengo ndipo zimakhala ndi kukhazikika kwazithunzi.PVC imalimbana kwambiri ndi ma oxidizing agents, ochepetsera komanso ma acid amphamvu.Komabe, imatha kuipitsidwa ndi ma oxidizing acids monga moyikira sulfuric acid ndi acidity ya nitric, ndipo si yoyenera kukhudzana ndi ma hydrocarbon onunkhira kapena okoloni.
Kutentha kwa kutentha kwa PVC panthawi yokonza ndikofunika kwambiri.Ngati chizindikiro ichi sichiri choyenera, mavuto owonongeka a zinthu adzachitika.The otaya katundu wa PVC ndi osauka kwambiri ndipo njira zake zosiyanasiyana ndi yopapatiza kwambiri.Otsika maselo kulemera PVC zipangizo nthawi zambiri ntchito, makamaka chifukwa mkulu maselo kulemera PVC zipangizo n'zovuta pokonza (mtundu uwu wa zinthu zambiri amafuna kuwonjezera mafuta kuti kusintha katundu otaya).Mlingo wocheperako wa PVC ndi wotsika kwambiri, nthawi zambiri 0.2-0.6%.
Nthawi yotumiza: Oct-20-2021
