PVDF yana tsayayya da yawancin kwayoyin halitta da sinadarai na inorganic gami da kaushi mai chlorinated.Poly(vinyl fluoride) wani abu ne na semirystalline polymer tare da tsari, zigzag conformation.Matsayin crystallinity na iya bambanta sosai daga 20 zuwa 60% kuma aiki ne na tsarin lahani.
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PVDF Properties
Polyvinylidene fluoride shine polymer semirystalline (35e70% crystallinity) tare da sarkar zigzag mai tsawo. Ƙarin kai-da-wutsiya na VDF ya mamaye amma akwai lahani na kai ko wutsiya da ke shafar crystallinity da kaddarorin PVDF.
PVDF yana da sauye-sauye da yawa kuma yawansa yana canzawa ga kowace jihar polymorph.Akwai sanannun jahohi huɗu da aka gabatar, masu suna a, b, g, da d.Mafi yawan lokaci shine a-PVDF wanda ke nuna canji a 70 C (g), 38 C (b), 50 C (a"), da 100 C (a').
PVDF yana tsayayya da yawancin kwayoyin halitta da sinadarai na inorganic gami da kaushi mai chlorinated.Ƙarfafan tushe, amines, esters, da ketones suna kai hari ga wannan guduro.Tasirin ya tashi daga kumburi zuwa cikar narkewa a cikin waɗannan kaushi dangane da yanayin.PVDF yana nuna dacewa tare da adadin polymers.Ganawa mai amfani da kasuwanci tare da acrylics da methacrylics an haɓaka su.
PVDF, kamar ETFE, tana haɗe-haɗe da sauri sakamakon fallasa zuwa radiation.Radiation (gamma haskoki) yana da matsakaicin tasiri akan kayan aikin injiniya na PVDF.
Abubuwan da aka bayar na PVF
Poly(vinyl fluoride) wani abu ne na semirystalline polymer tare da tsari, zigzag conformation.Matsayin crystallinity na iya bambanta sosai daga 20 zuwa 60% kuma aiki ne na tsarin lahani.PVF na kasuwanci yana da dabara, ya ƙunshi kusan 12% haɗin kai-da-kai, kuma yana nuna alamar narkewar kusan 190 C.
PVF yana nuna canje-canje da yawa a ƙasan zafin jiki na narkewa.Ƙananan Tg yana faruwa a 15 zuwa 20 C kuma Tg babba yana cikin kewayon 40e50 C.An ba da rahoton wasu canje-canje guda biyu a 80 C da 150 C.
PVF yana da ƙananan solubility a cikin duk abubuwan da ke ƙasa game da 100 C. An shirya polymers tare da mafi girma ta hanyar amfani da 0.1% 2-propanol polymerization modifier kuma an halicce su a cikin N, N-dimethylformamide bayani dauke da 0.1 N LiBr.Mn ya kasance daga 76,000 zuwa 234,000 (osmometry), da Ms daga 143,000 zuwa 654,000 (gudun datsewa).
An ba da rahoton cewa PVF mai nauyin nauyin kwayoyin zai ragu a cikin yanayi maras kyau, tare da asarar HF na lokaci guda da raguwar kashin baya yana faruwa a kusan 450 C. A cikin iska, hasara na HF yana faruwa a kusan 350 C, sannan kuma raguwar kashin baya a kusa da 450 C.
PVF a bayyane yake zuwa radiation a cikin UV, bayyane, da yankuna kusa da infrared, yana watsa 90% na radiation daga 350 zuwa 2500 nm.PVF ya zama mai ruɗewa yayin fallasa hasken wutar lantarki na 1000 Mrad amma yana tsayayya da rushewa a ƙananan allurai.Yana riƙe ƙarfinsa a 32 Mrad yayin da PTFE ya ragu a 0.2 Mrad.
Yanayin zafin jiki mai kunnawa na fim ɗin PVF shine 390 C. Ƙimar ƙarancin oxygen (LOI) don PVF shine 22.6%.HF da cakuda kayan kamshi da aliphatic hydrocarbons ana samun su daga lalatawar thermal na PVF.
Lokacin aikawa: Afrilu-04-2018