Fluorinated ethylene propylene ma ọ bụ FEP bụ copolymer nke hexafluoropropylene na tetrafluoroethylene.Ọ dị iche na PTFE (polytetrafluoroethylene) resins n'ihi na ọ na-agbaze-processing iji ot injection ịkpụzi na ịghasa extrusion usoro.Ọ bụ DuPont chepụtara ethylene propylene Fluorinated ma na-ere ya n'okpuru akara aha polymer FEP.Aha aha ndị ọzọ bụ Neollon FEP sitere na Daikin ma ọ bụ Dyneon FEP sitere na Dyneon/3M.
FEP yiri nnọọ fluoropolymers PTFE (polytetrafluoroethylene) na PFA (perfluoroalkoxy polymer resin).FEP na PFA na-ekekọrịta ihe bara uru nke PTFE nke obere esemokwu na enweghị mmeghachi omume, mana ọ na-adị mfe nhazi.FEP dị nro karịa PTFE wee gbazee na 260 Celsius;ọ bụ nke ukwuu nghọta na-eguzogide ìhè anyanwụ.
A na-emepụta FEP site na polymerization free-radical nke ngwakọta nke tetrafluoroethylene na hexafluoropropylene.Ngwakọta ahụ na-agbawa agbawa iji kwụọ ụgwọ maka mmeghachi omume dị ala nke akụkụ propylene.A na-ebutekarị usoro a na peroxydisulfate, nke na-emepụta ihe na-emepụta sulfate radicals.N'ihi na FEP na-adịghị mma soluble na ihe fọrọ nke nta ka ọ bụrụ ihe mgbaze niile, a na-eduzi polymerization dị ka emulsion na mmiri, na-ejikarị surfactant dị ka PFOS.Polymer nwere ihe dịka 5% nke akụrụngwa propylene.
Enwere ike ịhụ tebụl ntụnyere bara uru nke PTFE megide FEP, PFA na ETFE na webụsaịtị DuPont, na-edepụta akụrụngwa, thermal, kemịkalụ, eletriki na vapor nke ọ bụla, n'akụkụ n'akụkụ.
N'ihe gbasara nguzogide corrosion, FEP bụ naanị fluoropolymer ndị ọzọ dị ngwa ngwa nke nwere ike dakọtara na PTFE n'onwe ya na-emegide ndị na-akpata caustic, ebe ọ bụ usoro carbon-fluorine dị ọcha yana fluorinated zuru oke.
Igwe ọkụ, FEP pụtara na PTFE na PFA site n'inwe ebe mgbaze nke 260 Celsius C (500 Celsius F), ihe dị ka ogo iri anọ dị ala karịa PFA wee gbadata ọzọ karịa PTFE.
Eletriki, PTFE, FEP na PFA nwere otu dielectric constants, mana ike dielectric FEP bụ naanị PFA karịrị.Otú ọ dị, ebe PFA nwere ihe nkwụsịtụ yiri nke ahụ na PTFE, nkwụsị FEP dị ihe dị ka okpukpu isii karịa nke PFA na EFTE (na-eme ka ọ bụrụ onye na-eduzi ubi electrostatic).
Mechanically, FEP dịtụ mgbanwe karịa PTFE.Ikekwe ọ bụ ihe ijuanya, ọ naghị anabata mpịakọta ugboro ugboro yana PTFE.Ọ na-egosipụtakwa ọnụọgụ dị elu nke esemokwu dị ike, dị nro ma nwee obere ike tensile dị ala karịa PTFE na PFA.
Otu ihe dị ịrịba ama nke FEP bụ na ọ dị elu karịa PTFE na ụfọdụ ngwa mkpuchi metụtara ikpughe na ncha.
Ethylene tetrafluoroethylene (ETFE), n'ọtụtụ ụzọ, enwere ike iche na ọ bụ nke otu dị iche iche, ebe ọ bụ n'ezie ụdị injinia dị elu nke ndị ọzọ na-egosipụta ihe a ga-ewere na ọ dị ntakịrị ihe onwunwe na mpaghara ndị ọzọ ma e jiri ya tụnyere ya. PTFE, FEP na PFA.
Oge nzipu: Eprel-30-2018