Kodi Makhalidwe a Polyvinyl Chloride (PVC) ndi ati?

Zina mwazinthu zofunika kwambiri za Polyvinyl Chloride (PVC) ndi:

1. Kachulukidwe:PVC ndi wandiweyani kwambiri poyerekeza ndi mapulasitiki ambiri (enieni mphamvu yokoka kuzungulira 1.4)
2. Zachuma:PVC imapezeka mosavuta komanso yotsika mtengo.
3. Kulimba:PVC yolimba imakhala bwino pakulimba komanso kulimba.
4. Mphamvu:PVC yolimba imakhala ndi mphamvu zolimba kwambiri.

Polyvinyl Chloride ndi "thermoplastic" (mosiyana ndi "thermoset") zakuthupi, zomwe zimagwirizana ndi momwe pulasitiki imayankhira kutentha.Zipangizo za thermoplastic zimakhala zamadzimadzi zikasungunuka (kusiyana kwa PVC pakati pa madigiri 100 otsika kwambiri ndi apamwamba ngati 260 digiri Celsius kutengera zowonjezera).Chofunikira chachikulu chokhudza thermoplastics ndikuti amatha kutenthedwa mpaka pomwe amasungunuka, kuziziritsidwa, ndikutenthedwanso popanda kuwonongeka kwakukulu.M'malo mowotcha, ma thermoplastics ngati polypropylene liquefy amawalola kuti apangidwe mosavuta ndi jakisoni kenako nkusinthidwanso.Mosiyana ndi izi, mapulasitiki a thermoset amatha kutenthedwa kamodzi kokha (nthawi zambiri pakupanga jekeseni).Kutentha koyamba kumapangitsa kuti zipangizo za thermoset zikhazikike (zofanana ndi 2-part epoxy), zomwe zimapangitsa kusintha kwa mankhwala komwe sikungathe kusinthidwa.Mukayesa kutenthetsa pulasitiki ya thermoset kuti ikhale yotentha kwambiri kachiwiri, imangoyaka.Izi zimapangitsa kuti zida za thermoset zisamangidwenso.

PVC imapereka mitundu yosiyanasiyana ya ntchito ndi zabwino m'mafakitale angapo m'njira zake zokhazikika komanso zosinthika.Makamaka, Rigid PVC ili ndi kachulukidwe kakang'ono ka pulasitiki, kupangitsa kuti ikhale yolimba kwambiri komanso yamphamvu kwambiri.Imapezekanso mosavuta komanso yotsika mtengo, yomwe, kuphatikiza ndi mapulasitiki ambiri okhala ndi nthawi yayitali, imapangitsa kukhala chisankho chosavuta pamafakitale ambiri monga zomangamanga.

PVC imakhala yolimba kwambiri komanso yopepuka, yomwe imapangitsa kuti ikhale yokongola pomanga, mapaipi, ndi ntchito zina zamafakitale.Kuphatikiza apo, kuchuluka kwake kwa klorini kumapangitsa kuti zinthuzo zisapse ndi moto, chifukwa chinanso chomwe chatchuka m'mafakitale osiyanasiyana.