Makhalidwe a PVC pulasitiki zipangizo

Makhalidwe a PVC pulasitiki zipangizo

pulasitiki nkhungu-86

1 Mbali: Olimba PVC ndi mmodzi wa anthu ambiri ntchito zipangizo pulasitiki.PVC ndi zinthu zopanda crystalline.

2: Ma Stabilizers, lubricant, othandizira othandizira, inki, anti-impact agents ndi zina zowonjezera nthawi zambiri zimawonjezeredwa ku zida za PVC pakugwiritsa ntchito kwenikweni.

3 Mbali: PVC zakuthupi sizimayaka, kulimba kwambiri, kukana nyengo komanso kukhazikika kwazithunzi.

4 Mbali: PVC ili ndi kukana kolimba kwa okosijeni, kuchepetsa wothandizila ndi ma asidi amphamvu.Komabe, imatha kuipitsidwa ndi ma oxidizing acids okhazikika monga sulfuric acid ndi ndende ya nitric acid ndipo siyenera kukhudzana ndi ma hydrocarbon onunkhira ndi ma chlorinated hydrocarbon.

Mbali 5: Kutentha kwa kutentha kwa PVC panthawi yokonza ndizofunikira kwambiri.Ngati chizindikiro ichi sichiyenera, chidzayambitsa vuto la kuwonongeka kwa zinthu.

Mbali 6: Makhalidwe otaya a PVC ndi osauka kwambiri, ndipo njira zake zimakhala zopapatiza kwambiri.Makamaka ma molekyulu olemera kwambiri a PVC ndi ovuta kukonza (zinthu zamtunduwu nthawi zambiri zimafunikira kuwonjezera mafuta kuti ziwongolere mawonekedwe ake), motero zinthu za PVC zokhala ndi mamolekyu ang'onoang'ono zimagwiritsidwa ntchito.

Gawo 7: Kuchepa kwa PVC kumakhala kochepa, nthawi zambiri 0.2 ~ 0.6%.

Polyvinyl kolorayidi, yofupikitsidwa ngati PVC (Polyvinyl kolorayidi) mu Chingerezi, ndi vinyl chloride monomer (VCM) mu peroxides, azo mankhwala ndi zina zoyambitsa;kapena pansi pa zochita za kuwala ndi kutentha malinga ndi ufulu kwakukulu ma polymerization anachita limagwirira ma polima opangidwa ndi polymerization.Vinyl chloride homopolymer ndi vinyl chloride copolymer onse pamodzi amatchedwa vinyl chloride resin.

PVC ndi ufa woyera wokhala ndi mawonekedwe amorphous.Digiri ya nthambi ndi yaying'ono, kachulukidwe wachibale ndi pafupifupi 1.4, kutentha kwa galasi ndi 77 ~ 90 ℃, ndipo imayamba kuwola pafupifupi 170 ℃.Kukhazikika kwa kuwala ndi kutentha kumakhala kosauka, pamwamba pa 100 ℃ kapena patapita nthawi yaitali.Dzuwa lidzawola kuti lipange hydrogen chloride, yomwe imapangitsa kuti kuwonongekako kuwonongeke, kuchititsa kuti khungu liwonongeke, ndipo zinthu zakuthupi ndi zamakina zimatsikanso mwachangu.Pochita ntchito, ma stabilizer ayenera kuwonjezeredwa kuti apititse patsogolo kutentha ndi kuwala.

The maselo kulemera kwa mafakitale opangidwa PVC zambiri mu osiyanasiyana 50,000 kuti 110,000, ndi polydispersity lalikulu, ndi kulemera kwa maselo kumawonjezeka ndi kuchepa kwa kutentha polymerization;ilibe malo osungunuka okhazikika, imayamba kufewetsa pa 80-85 ℃, ndipo imakhala viscoelastic pa 130 ℃, 160 ~ 180 ℃ imayamba kusinthika kukhala viscous fluid state;Ili ndi zida zamakina abwino, kulimba kwamphamvu ndi pafupifupi 60MPa, mphamvu yake ndi 5 ~ 10kJ/m2, ndipo ili ndi zida zabwino kwambiri zama dielectric.

PVC inali yopanga mapulasitiki ambiri padziko lonse lapansi, ndipo imagwiritsidwa ntchito kwambiri.Amagwiritsidwa ntchito kwambiri muzomangamanga, zinthu zamafakitale, zofunikira zatsiku ndi tsiku, zikopa zapansi, matailosi apansi, zikopa zopanga, mapaipi, mawaya ndi zingwe, mafilimu onyamula, mabotolo, zinthu zotulutsa thovu, zida zosindikizira, ulusi, etc.

Fakitale yathu imagwiritsa ntchito bwinonkhunguzipangizo, monga 718, 718H, etc., zabwino nkhungu zipangizo, moyo wautali, ndi mankhwala ntchito zipangizo zosiyanasiyana pulasitiki akhoza kupanga apamwamba mankhwala pulasitiki.


Nthawi yotumiza: Oct-23-2021