Polyvinyl chloride (PVC)pulasitiki ndi chinthu chophatikizika chopangidwa ndi kusakaniza PVC utomoni ndi zina zosiyanasiyana. Imawonetsa zinthu zabwino zamakina, kukana kwa dzimbiri kwamankhwala, kuzimitsa zokha, kukana nyengo yabwino, kukana kwamphamvu kwamagetsi kwamagetsi, kusavuta kukonza, komanso kutsika mtengo, ndikupangitsa kuti ikhale chinthu chabwino kwambiri cholumikizira waya ndi chingwe komanso kutulutsa.
PVC utomoni ndi liniya thermoplastic polima wopangidwa ndi polymerization wa vinilu kolorayidi monomers. Mapangidwe ake a mamolekyu ali ndi:
(1) Monga polima ya thermoplastic, imawonetsa pulasitiki wabwino komanso kusinthasintha.
(2) Kukhalapo kwa C-Cl polar bond kumapangitsa kuti utomoni ukhale wolimba kwambiri, zomwe zimapangitsa kuti dielectric ikhale yowonjezereka (ε) ndi dissipation factor (tanδ), pamene ikupereka mphamvu ya dielectric yapamwamba pafupipafupi. Zomangira za polarzi zimathandizanso kuti pakhale mphamvu zamphamvu za intermolecular komanso mphamvu zamakina apamwamba.
(3) Ma atomu a klorini omwe ali m'maselo a maselo amapereka mphamvu zoletsa moto komanso kupirira bwino kwa mankhwala ndi nyengo. Komabe, maatomu a kloriniwa amasokoneza mawonekedwe a crystalline, zomwe zimapangitsa kuti kutentha kusakhale kochepa komanso kuzizira kozizira, komwe kumatha kupitilizidwa ndi zowonjezera zoyenera.
2. Mitundu ya PVC Resin
The polymerization njira kwa PVC monga: kuyimitsidwa polymerization, emulsion polymerization, chochuluka polymerization, ndi njira polymerization.
Njira yoyimitsidwa ya polymerization pakadali pano ndiyofala kwambiri pakupanga utomoni wa PVC, ndipo uwu ndi mtundu womwe umagwiritsidwa ntchito pama waya ndi chingwe.
Kuyimitsidwa-polymerized PVC resins amagawidwa m'magulu awiri:
Utoto wamtundu wotayirira (mtundu wa XS): Wodziwika ndi mawonekedwe a porous, mayamwidwe apamwamba a plasticizer, plastification yosavuta, kuwongolera kosavuta, ndi tinthu tating'ono ta gel, ndikupangitsa kuti ikhale chisankho chokondedwa pama waya ndi chingwe.
Utoto wamtundu wa Compact (mtundu wa XJ): Amagwiritsidwa ntchito makamaka pazinthu zina zamapulasitiki.
3.Zofunika Kwambiri za PVC
(1)Makina Osungunula Magetsi: Monga chida champhamvu kwambiri cha dielectric, PVC resin imawonetsa zinthu zabwino koma zotsika pang'ono zotchinjiriza magetsi poyerekeza ndi zinthu zomwe sizikhala ndi polar monga polyethylene (PE) ndi polypropylene (PP). Voliyumu ya resistivity imaposa 10¹⁵ Ω·cm; pa 25 ° C ndi 50Hz pafupipafupi, dielectric constant (ε) imachokera ku 3.4 mpaka 3.6, yosiyana kwambiri ndi kutentha ndi kusintha kwafupipafupi; dissipation factor (tanδ) imachokera ku 0.006 mpaka 0.2. Mphamvu zowonongeka zimakhalabe zapamwamba kutentha kwa chipinda ndi mafupipafupi a mphamvu, osakhudzidwa ndi polarity. Komabe, chifukwa cha kutayika kwake kwa dielectric kwambiri, PVC siyenera kuyika magetsi othamanga kwambiri komanso othamanga kwambiri, omwe amagwiritsidwa ntchito ngati zida zotchinjiriza pazingwe zotsika komanso zapakati-voltage pansi pa 15kV.
(2) Kukhazikika Kukalamba: Ngakhale mawonekedwe a mamolekyu akuwonetsa kukhazikika kwa ukalamba chifukwa cha ma chlorine-carbon bond, PVC imakonda kumasula hydrogen chloride panthawi yokonza pansi pa kupsinjika kwamafuta ndi makina. Kuchuluka kwa okosijeni kumabweretsa kuwonongeka kapena kulumikizana, kupangitsa kusinthika, kusinthika, kuchepa kwakukulu kwamakina, komanso kuwonongeka kwa magwiridwe antchito amagetsi. Choncho, ma stabilizers oyenera ayenera kuwonjezeredwa kuti apititse patsogolo kukalamba.
(3) Thermomechanical Properties: Monga polima amorphous, PVC ilipo m'madera atatu a thupi pa kutentha kosiyana: magalasi, dziko lapamwamba kwambiri, ndi kayendedwe ka viscous. Ndi kutentha kwa galasi (Tg) mozungulira 80 ° C ndi kutentha kwa mpweya pafupifupi 160 ° C, PVC mu mawonekedwe ake a galasi kutentha kutentha sikungathe kukwaniritsa zofunikira za waya ndi chingwe. Kusinthidwa ndikofunikira kuti mukwaniritse kutentha kwambiri kutentha kwa chipinda ndikusunga kutentha kokwanira ndi kuzizira. Kuwonjezera kwa mapulasitiki amatha kusintha bwino kutentha kwa galasi.
Monga ogulitsa mawaya ndi zida zopangira chingwe, DZIKO LAPANSI (OW Cable) limapereka mankhwala apamwamba kwambiri a PVC opangira zotsekemera ndi zotsekemera, zomwe zimagwiritsidwa ntchito kwambiri mu zingwe zamagetsi, mawaya omangira, zingwe zoyankhulirana, ndi waya wamagalimoto. Zipangizo zathu za PVC zimakhala ndi magetsi otsekemera kwambiri, kutentha kwa moto, ndi kukana kwa nyengo, zomwe zimagwirizana ndi miyezo ya mayiko monga UL, RoHS, ndi ISO 9001. Tadzipereka kupereka mayankho odalirika komanso otsika mtengo a PVC ogwirizana ndi zosowa za makasitomala athu.
Nthawi yotumiza: Mar-27-2025