PVDF inopikisa zvakanyanya organic uye inorganic makemikari anosanganisira chlorinated solvents.Poly(vinyl fluoride) is semicrystalline polymer ine planar, zigzag conformation.Chiyero chekristallinity chinogona kusiyanisa zvakanyanya kubva pa20 kusvika 60% uye ibasa rezvakaremara zvimiro.
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PVDF Properties
Polyvinylidene fluoride is a semicrystalline polymer (35e70% crystallinity) ine zigzag chain yakatambanudzwa.Musoro-to-muswe wekuwedzera weVDF unotonga asi pane headto-head kana muswe-to-muswe urema hunokanganisa crystallinity uye zvimiro zvePVDF.
PVDF ine akati wandei ekuchinja uye density yayo inochinja kune yega yega polymorph state.Kune nyika ina dzinozivikanwa dzakarongwa, dzine mazita a, b, g, uye d.Chikamu chinonyanyozivikanwa ndeche a-PVDF inoratidza shanduko pa70 C (g), 38 C(b), 50 C (a”), uye 100 C (a').
PVDF inopikisa zvakanyanya organic uye inorganic makemikari anosanganisira chlorinated solvents.Mabhesi akasimba, maamine, esters, uye ketoni anorwisa iyi resin.Mhedzisiro yacho inotangira pakuzvimba kusvika pakupera kunyungudika mune izvi zvinonyungudutsa zvinoenderana nemamiriro ezvinhu.PVDF inoratidza kuenderana nehuwandu hwemapolymers.Zvekutengeserana zvinobatsira zvinosanganiswa ne acrylics uye methacrylics zvakagadzirwa.
PVDF, sezvakangoita ETFE, inokurumidza kuyambuka semhedzisiro yekusangana nemwaranzi.Radiation (gamma rays) ine mwero mhedzisiro pamichina yePVDF.
PVF Properties
Poly(vinyl fluoride) is semicrystalline polymer ine planar, zigzag conformation.Chiyero chekristallinity chinogona kusiyanisa zvakanyanya kubva pa20 kusvika 60% uye ibasa rezvakaremara zvimiro.Commercial PVF is atactic, ine zvingangoita 12% head-to-head linkages, uye inoratidza peak yekunyungudika inosvika 190 C.
PVF inoratidza shanduko dzinoverengeka pazasi petembiricha yekunyungudika.Lower Tg inowanikwa pa15 kusvika ku20 C uye kumusoro Tg iri mu40e50 C.Dzimwe shanduko mbiri pa80 C uye 150 C dzakataurwa.
PVF ine low solubility mune zvese zvinonyungudutsa pazasi nezve 100 C. Mapolymers ane solubility yakakura akagadzirirwa achishandisa 0.1% 2-propanol polymerization modifier uye akaiswa muN, N-dimethylformamide mhinduro ine 0.1 N LiBr.Mn kubva pa76,000 kusvika 234,000 (osmometry), uye Ms kubva 143,000 kusvika 654,000 (sedimentation velocity).
High molecular weight PVF inonzi inokanganisa mumhepo inert, pamwe chete neHF kurasikirwa uye kuparara kwemusana kunoitika panenge 450 C. Mumhepo, kurasikirwa kweHF kunoitika panenge 350 C, inoteverwa nekutsemuka kwemusana kunosvika 450 C.
PVF iri pachena kune mwaranzi muUV, inoonekwa, uye pedyo-infrared matunhu, ichiendesa 90% yemwaranzi kubva pa350 kusvika 2500 nm.PVF inova yakanyungudika kana yasangana nemagetsi-beam mwaranzi ye1000 Mrad asi inoramba kuparara pamwero wakaderera.Iyo inochengetedza simba rayo pa32 Mrad nepo PTFE yakaderedzwa pa 0.2 Mrad.
The self-ignition tembiricha yePVF film is 390 C. The limiting oxygen index (LOI) yePVF i22.6%.HF uye musanganiswa wekunhuhwirira uye aliphatic hydrocarbons inogadzirwa kubva mukupisa kwekupisa kwePVF.
Nguva yekutumira: Kubvumbi-04-2018