Katundu wa Polymer - PCTFE & ETFE & ECTFE Properties

PCTFE ndi polima wa semicrystalline wokhala ndi unyolo wa polima wa helical ndi kristalo wa pseudohexagonal.PVDF ndi equimolar ETFE ndi ma isomers koma chotsirizirachi chimakhala ndi malo osungunuka kwambiri komanso kuchepa kwa dielectric kusiyana ndi zakale.Zofanana ndi ETFE, ECTFE terpolymers (ma termonomers omwewo) ali ndi makina abwino komanso abrasion komanso kukana kwa ma radiation kuposa PTFE ndi ma perfluoropolymers ena.

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Zithunzi za PCTFE

PCTFE ndi polima wa semicrystalline wokhala ndi unyolo wa polima wa helical ndi kristalo wa pseudohexagonal.Kukula kwa kristalo ndi kozungulira ndipo kumakhala ndi maunyolo opindika.Kukula kwakukulu kwa klorini kumalepheretsa recrystallization pambuyo pa kusungunuka panthawi yokonza.Utoto uwu uli ndi katundu wabwino pa kutentha kwa cryogenic poyerekeza ndi mapulasitiki ambiri, ngakhale kuti ndi otsika kuposa ma fluoropolymers ena kupatula PVDF.

PCTFE ili ndi zotchinga zapadera komanso kukana kwamphamvu kwambiri kwamankhwala.Imawukiridwa ndi ma organic solvents angapo.

PCTFE imakhala ndi kukhazikika kwamafuta ochepa ndipo imawonongeka ikafika posungunuka, zomwe zimafunikira chisamaliro chapadera pakukonza.

Mtengo wa magawo ETFE

PVDF ndi equimolar ETFE ndi ma isomers koma otsirizawa ali ndi malo osungunuka kwambiri komanso kuchepa kwa dielectric kusiyana ndi zakale.ETFE imawonekera m'maselo a unit omwe amakhulupirira kuti ndi orthorhombic kapena monoclinic.Mapangidwe a molekyulu a ETFE ndi zigzag yowonjezera.Polima iyi imasungunuka mu esters ena otentha pamwamba pa 230 C, motero kulola kutsimikiza kwa kulemera kwa maselo (kulemera-avareji) mwa kubalalika.ETFE ili ndi masinthidwe angapo, kupumula kwa alpha ku 110 C (kusintha kupita ku 135 C pa crystallinity yapamwamba), beta pa 25 C, ndi kupumula kwa gamma pa 120 C.

Ma terpolymers a ETFE ali ndi zida zabwino zamakina kuphatikiza kukhazikika komanso kutsika pang'ono komanso kutsika pang'ono kuposa ma perfluoropolymers.ETFE imalimbana ndi ma radiation kuposa ma perfluoropolymers (omwe amakhudzidwa pang'ono mpaka 20 Mrad) ndipo amatha kuwoloka ndi ma radiation monga electron mtengo.Crosslinking imagwiritsidwa ntchito kulimbikitsa kukana kwa waya wa ETFE.

ETFE ili ndi dielectric constant ya 2.6e3.4 ndi dissipation factor ya 0.0006e0.010 pamene mafupipafupi amawonjezeka kuchokera 102 mpaka 1010 Hz.

Ma ETFE terpolymers amalimbana ndi kupsinjika kwapang'onopang'ono komanso kuwukira kwamankhwala ndi mankhwala ambiri.Ma oxidizing acids amphamvu, ma acid owiritsa owiritsa a sulfonic acid, ndi ma organic bases (amines) amaukira ETFE ndi mankhwala aliwonse omwe amakhudza PTFE, PFA, ndi FEP.

Mtengo wa ECTFE

ECTFE ndi semicrystalline (50e60%) ndipo imasungunuka pa 240 C. Imakhala ndi mpumulo wa alpha pa 140 C, beta pa 90 C, ndi kupumula kwa gamma ku 65 C. Conformation ya ECTFE ndi zigzag yowonjezera yomwe ethylene ndi CTFE zimasintha.Selo la unit la crystal ya ECTFE ndi hexagonal.

Mofanana ndi ETFE, ECTFE terpolymers (ma termonomers omwewo) ali ndi makina abwino komanso abrasion komanso kukana kwa radiation kuposa PTFE ndi ma perfluoropolymers ena.

Dielectric nthawi zonse ya ECTFE ndi 2.5e2.6, ndipo popanda kutentha ndi mafupipafupi.Dissipation factor ndi 0.02 komanso yayikulu kwambiri kuposa ya ETFE.

ECTFE imagonjetsedwa ndi mankhwala ambiri kupatulapo zosungunulira za polar ndi chlorinated.Simatsindika kusungunuka kwa crack mu zosungunulira zilizonse.ECTFE ili ndi zotchinga zabwinoko ku SO2, Cl2, HCl, ndi madzi kuposa FEP ndi PVDF.