PVDF e hanela lik'hemik'hale tse ngata tsa tlhaho le tse sa pheleng ho kenyelletsa le lihlapolli tse hloekisitsoeng ke chlorine.Poly(vinyl fluoride) ke polymer ea semicrystalline e nang le polane, zigzag conformation.Tekanyo ea crystallinity e ka fapana haholo ho tloha ho 20 ho isa ho 60% mme ke ts'ebetso ea meaho e nang le sekoli.
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Lintho tsa PVDF
Polyvinylidene fluoride ke semicrystalline polymer (35e70% crystallinity) e nang le ketane e atolositsoeng ea zigzag. Keketso ea hlooho-ho-mohatla ea VDF e laola empa ho na le mefokolo ea hlooho-hlooho kapa mohatla o amang crystallinity le thepa ea PVDF.
PVDF e na le liphetoho tse 'maloa le ho feto-fetoha ha eona bakeng sa boemo bo bong le bo bong ba polymorph.Ho na le linaha tse 'ne tse reriloeng, tse reheletsoeng e le a, b, g, le d.Karolo e tloaelehileng haholo ke a-PVDF e bonts'ang liphetoho ho 70 C (g), 38 C(b), 50 C (a”), le 100 C (a').
PVDF e hanela lik'hemik'hale tse ngata tsa tlhaho le tse sa pheleng ho kenyelletsa le lihlapolli tse hloekisitsoeng ke chlorine.Li-bases tse matla, li-amine, li-ester le li-ketone li hlasela resin ena.Tšusumetso e fapana ho tloha ho ho ruruha ho ea ho ho qhibiliha ka ho feletseng ho li-solvents tsena ho itšetlehile ka maemo.PVDF e bonts'a e tsamaellana le lipolima tse ngata.Metsoako e sebetsang khoebong le li-acrylics le methacrylics e entsoe.
PVDF, joalo ka ETFE, e hokahana habonolo ka lebaka la ho pepesehela mahlaseli.Radiation (mahlaseli a gamma) a na le phello e itekanetseng ho thepa ea mochine ea PVDF.
Thepa ea PVF
Poly(vinyl fluoride) ke polymer ea semicrystalline e nang le polane, zigzag conformation.Tekanyo ea crystallinity e ka fapana haholo ho tloha ho 20 ho isa ho 60% mme ke ts'ebetso ea meaho e nang le sekoli.PVF ea Khoebo ke e matla, e na le hoo e ka bang 12% ea likhokahano tsa hlooho le hlooho, 'me e bonts'a sebaka se phahameng sa ho qhibiliha se ka bang 190 C.
PVF e bonts'a liphetoho tse 'maloa ka tlase ho mocheso o qhibilihang.Tg e ka tlaase e hlaha ho 15 ho isa ho 20 C le Tg e ka holimo ke 40e50 C.Liphetoho tse ling tse peli ho 80 C le 150 C li tlalehiloe.
PVF e na le solubility e tlaase ho li-solvents tsohle tse ka tlase ho 100 C. Li-polymers tse nang le ho qhibiliha ho hoholo li lokiselitsoe ho sebelisa 0.1% 2-propanol polymerization modifier 'me li ne li khetholloa ka N, N-dimethylformamide tharollo e nang le 0.1 N LiBr.Mn o tloha ho 76,000 ho isa ho 234,000 (osmometry), mme Mme ho tloha ho 143,000 ho isa ho 654,000 (sedimentation velocity).
Boima bo phahameng ba limolek'hule PVF e tlalehoa hore e senyeha moeeng o sa sebetseng, ka ho lahleheloa ke HF ka nako e le 'ngoe le ho phunyeha ha mokokotlo ho etsahala hoo e ka bang 450 C. Moeeng, tahlehelo ea HF e etsahala hoo e ka bang 350 C, e lateloa ke mokokotlo oa mokokotlo o pota-potileng 450 C.
PvF e pepesitsoe ho radiation ho UV, e bonoang le haufi, e fetisetsang 90% ea radiation ho tloha 350 ho isa ho 2500 nm.PVF e hoholeha ha e pepesetsoa mahlaseli a electron-beam a 1000 Mrad empa e hanana le ho senyeha ha litekanyetso tse tlase.E boloka matla a eona ho 32 Mrad ha PTFE e senyeha ho 0.2 Mrad.
Mocheso oa ho itšeha oa filimi ea PVF ke 390 C. Moeli o fokolang oa oksijene index (LOI) bakeng sa PVF ke 22.6%.HF le motsoako oa li-hydrocarbon tse nkhang hamonate le tsa aliphatic li hlahisoa ke ho senyeha ha mocheso oa PVF.
Nako ea poso: Apr-04-2018