Njirimara kemịkalụ nke FEP yiri nke PTFE na PFA.
Njirimara PFA
Ndị polymer PFA na-agbaze n'ụzọ zuru ezu ma na-agbazekwa ya.Ha nwere nguzogide kemịkalụ na nkwụsi ike ọkụ dị ka PTFE.Nnukwu ike ndọda nke perfluoroalkoxy resins dị na nso nke 2.12e2.17.PFA nwere okpomọkụ na-aga n'ihu na-aga n'ihu nke 260 C.
Crystallinity na ike ndọda kpọmkwem nke akụkụ PFA na-ebelata mgbe ọnụego jụrụ oyi nke polymer a wụrụ awụ na-abawanye.Kristalinity kacha ala enwetara site na imenyụ PFA a wụrụ awụ na ice bụ 48% (ike ndọda 2.123).
Yiri PTFE, enweghị ike iji usoro eji eme ihe tụọ arọ molecular nke PFA.A na-eji ihe na-apụtaghị ìhè a na-akpọ melt flow rate (MFR) nke a na-akpọ melt flow index (MFI) nke bụ ọnụọgụ polymer gbazere nke ga-esi na rheometer capillary na ọnọdụ okpomọkụ dị n'okpuru ibu akọwapụtara (na-emekarị na gram na nkeji 10) .MFR na-agbanwe agbanwe na viscosity;viscosity dabara kpọmkwem na arọ molekụla nke polymer.
PFA na-egosiputa mgbanwe nke mbụ na 5 C n'ụzọ dị iche na okpomọkụ abụọ maka PTFE na 19 na 30 C. Ọ nwere mgbanwe atọ nke abụọ na 100, 30 na 90 C.
PFA nwere ezigbo ọkụ eletrik dị ka nguzogide mkpuchi dị elu, obere dielectric na-adịgide adịgide (2.1), na ihe nkwụsịtụ dị ala.Dielectric na-adịgide adịgide na ihe nkwụsịtụ na-anọgide na-agbanweghị agbanwe na nso nke 40 ruo 250 C na 102 Hz ruo 2.4 1010 Hz.Ike mgbawa dielectric (obere oge) bụ 80 kV / mm maka ihe nkiri 0.25-mm.
Ngwakọta kemịkalụ nke PFA yiri nke PTFE.PFA radieshon na-awakpo, na mmebi ikuku na-amalite na obere dose dị elu karịa nke PTFE nke na-amalite imebi na 0.02 Mrad.
Njirimara FEP
Fluorinated ethylene-propylene copolymers bụ fluorinated n'ụzọ zuru ezu na agbaze-processible.Ha nwere ezigbo nguzogide kemịkalụ na nkwụsi ike thermal.Nnukwu ike ndọda nke FEP resins dị na nso nke 2.13e2.15.FEP nwere okpomọkụ na-aga n'ihu na-aga n'ihu nke 200 C.
Yiri PTFE, enweghị ike iji usoro a na-ahụkarị tụọ arọ molikula nke FEP.Dị ka PFA, a na-eji MFR kọwaa ịdị arọ nke FEP.MFR na ịdị arọ molekụla nwere njikọ chiri anya.
A na-ekpebi nkesa ịdị arọ molecular site na ịlele modul ike nke polymer gbazere site na iji nyocha rheological.Crystallinity nke nwa agbọghọ na-amaghị nwoke (anaghị agbaze) FEP bụ 65e75%.
FEP na-egosiputa mgbanwe mgbanwe nke mbụ bụ ebe agbaze ya.Ọnọdụ izu ike nke FEP na-abawanye site na ọdịnaya HFP nke copolymer.FEP nwere mgbanwe dielectric na 150 C nke na-emetụtaghị monomer mejupụtara ma ọ bụ crystallinity (ike ndọda pụrụ iche).
Njirimara kemịkalụ nke FEP yiri nke PTFE na PFA.
A na-awakpo FEP site na radieshon, na mmebi ya na ikuku na-amalite na dose nke 0.2 Mrad (ugboro 10 dị elu karịa nke PTFE).
Oge nzipu: Mar-04-2018