Nyati sia ƒo nu tso PTFE avɔ si ƒe dzoxɔxɔ lolo zazã le carbon fiber flat composite products me ŋu. Compression molding: wotsɔe de molds kple prepregs dome si xea mɔ na epoxy resin adhesion, si wɔnɛ be demolding bɔbɔe; wotsɔe bla ɖe akpa tsɛ geɖe dome be woagalé ɖe wo nɔewo ŋu o. Vacuum bag molding: reusable release film le prepreg kple breather avɔ dome, si ɖea mɔ na gas / resin to esime wònana bɔbɔe peeling le dɔyɔyɔ megbe; textured side transfers fine surface texture be wòana kadodoa ƒe ƒuƒuiƒe nanyo ɖe edzi, si ɖea sanding ɖa. Ewɔwɔ atraɖii: seamless non-stick conveyor belts tsɔa prepregs to dzoxɔxɔ / tete teƒewo; cushion layer maa nyaƒoɖeamenu sɔsɔe ɖea localized indentations dzi kpɔtɔna.

Nyati sia dzro alesi wòanya wɔ be woawɔ dzobibi na PTFE ƒe anyigba ƒe tɔtrɔ eye wòtsɔ eƒe ŋusẽkpɔɖeamedziwo sɔ kple corona kple plasma dɔdamɔnu. Ate ŋu adzɔ: dzo ate ŋu atrɔ asi le PTFE ŋu gake ƒã hafi wozãnɛ le dɔwɔƒewo — dedienɔnɔ ƒe afɔkuwo (PTFE gblẽna si ɖea aɖi HF kple perfluoroisobutylene ɖe go); dɔwɔwɔ seɖoƒe li na (anyigbadziŋusẽ koe nye 30-35 mN/m, wɔa liƒo ƒe ƒuƒoƒo si gbɔdzɔ). Dɔwɔwɔ ƒe mɔnuwo: dzobibi — ɣeyiɣi kpui aɖe ƒe dzoxɔxɔ gã ƒe oxidation (>1000°C), etching vi aɖe, oxygen ƒuƒoƒo ʋɛ aɖewo; corona — elektrikŋusẽ si lolo ƒe dodo naa ozone/active oxygen dona, oxidation fafɛ, ŋusẽ ƒe ʋeʋẽ si le sue mate ŋu agbã CF kadodowo o; plasma — ŋusẽ geɖe ƒe nusuewo/elektrɔnik/free radicals mãa CF kadodowo me tẽ eye wodoa polar ƒuƒoƒowo (hydroxyl, carboxyl, amino).

Nyati sia tsɔ dodokpɔmɔnu etɔ̃ siwo wozãna tsɔ doa silikɔ ƒe nyaƒoɖeamenu ƒe aŋenuwo kpɔna ƒe nyateƒenyenye sɔna kple wo nɔewo. Solvent extraction (gel content) dzidzea insoluble network fraction to Soxhlet extraction dzi — wobu akɔnta wògbɔ eme le ŋutilã me ƒe akpa siwo wobla vodadatɔe be wonye crosslinks, precision ±2-5%, atike ƒe nyateƒetoto si bɔbɔ wu ta. DSC dzidzea dzoxɔxɔ si susɔ ɖe nuwɔna me (α=1-ΔHresidual/ΔHtotal) — kakaɖedzi le eŋu le tɔtrɔ si le bɔbɔe va ɖo titina me gake ebua eŋu wògbɔa eme le tɔtrɔ gã me le esi kaka ƒe ƒuƒoƒo susɔe siwo seɖoƒe li na ta, gbugbɔgawɔ <±2%.

Nyati sia ƒo nu tso PTFE ƒe dɔwɔwɔwo le dzoxɔxɔnutsitike ƒe nutsyɔnu na tu ƒe mɔ̃wo ŋu. Mɔnu ene: Endothermic decomposition — PTFE depolymerizes le ~400°C va tetrafluoroethylene (endothermic ŋutɔ, ~3,000°C dzobibi gas ƒe ɖeɖefia), xɔa dzoxɔxɔ gã aɖe eye wòɖea dzoxɔxɔŋusẽ tso gli ƒe anyime. Ya fafɛ kple gas film insulation — ya siwo gblẽna (tetrafluoroethylene) gena ɖe gota to micro-pores me, si ɖea dzoxɔxɔ si le anyigba dzi ɖa; gas film si le sisim ɖea dzobibi ƒe gas si ƒe dzoxɔxɔ lolo ɖe vovo tso gli ŋu, si ɖea dzoxɔxɔ si te ɖe gli ŋu dzi kpɔtɔna >50%; gas film trɔa liƒo ƒe sesẽme/dzoxɔxɔ, si ɖea nusuewo ƒe ʋuʋu dzi kpɔtɔna.

Nyati sia ƒo nu tso ŋusẽ si gamma-ray keklẽŋusẽ kpɔna ɖe PTFE ƒe wɔwɔme kple eƒe nɔnɔmewo dzi ŋu. Dzɔdzɔmeŋusẽ ƒe wɔwɔme trɔna: gamma keklẽwo gbãa CC kɔsɔkɔsɔ gãwo kple CF ƒe axadzi kɔsɔkɔsɔwo (G-asixɔxɔ 3.0-3.5), si wɔnɛ be kɔsɔkɔsɔwo ƒe ʋuʋu gã aɖe kple molecule ƒe kpekpeme dzi ɖena kpɔtɔna ŋutɔ; le oxygen me la, free radicals wɔa peroxy radicals siwo toa acyl fluoride kple carboxylic acid ƒe nuwuwu ƒuƒoƒowo vɛ (siwo tsia tsi me wòzua HF). Condensed structure trɔna: kristalo ƒe nɔnɔme dzina ɖe edzi le gɔmedzedzea me (agbɔsɔsɔ si le sue, kɔsɔkɔsɔ kpuiwo gbugbɔ ɖoa ​​ɖoɖo nu) emegbe eɖina (agbɔsɔsɔ si lolo wu, nusiwo gblẽ le kristalo ŋu gblẽa nu); lamellar kristalowo ma zua kristalo suewo kple ɖoɖo si bu le didiƒe. Nɔnɔme ƒe gbegblẽ: didime le gbagbã me dzi ɖena kpɔtɔna tso 0.1 kGy le ya me, ebu >90% le ~1kGy — nu va zua sesẽ eye wògbãna; eƒe dzoxɔxɔ ɖiɖina tso 327°C va ɖoa 310°C te; polar ƒuƒoƒowo doa dielectric constant/loss ɖe dzi vie; eƒe anyigba trɔna tso ɣi dzi va zua aŋutiɖiɖi/yibɔ kple keklẽ si bu.

Nyati sia ƒo nu tso mɔnu siwo dzi woato akpɔ PTFE ƒe nutsyɔnu ƒe kristalonyenye dzi le Teflon avɔ si me dzoxɔxɔ le ŋutɔ dzi ŋu. Fafa ƒe agbɔsɔsɔme dzi kpɔkpɔ le tẽ wu eye wòwɔa dɔ nyuie wu: Fafa kabakaba (tsitretsitsi) to ya fafɛ ƒe xɔmetsovɔwo, fafa ƒe ʋuƒo alo tsigowo dzi — molecule kɔsɔkɔsɔwo tsia tsikpe hafi ɖoɖo ɖe ɖoɖo nu, eye wowɔa kristalo suesuesue siwo mede blibo o; coating nye fafɛ, sesẽ kple optimized non-stick dɔwɔwɔ, vie dzi ɖe kpɔtɔ sesẽ / vuvu tsitretsitsi. Fafa blewu (annealing) to dzoxɔxɔ takpɔkpɔ ƒe akpa si le 10-50°C/h alo dzodoƒe ƒe fafa — molecule kɔsɔkɔsɔwo ɖoa ɖoɖo bliboe ɖe spherulites gã blibowo me; nusi wotsɔ blae ƒe sesẽme lolo, eɖe dzesi le eƒe vuvu nu, eƒe didime li ke, eƒe asitɔtrɔ le nɔnɔmewo ŋu dzi ɖe kpɔtɔ eye wògagbãna ɖe edzi.

Nyati sia ƒo nu tso Teflon avɔ si me dzoxɔxɔ le ŋutɔ zazã le ya dzodzoe ƒe tsatsam ƒe dzodoƒe siwo wotsɔna ƒoa dzoe ŋu. Ate ŋu adzɔ: woate ŋu azãe abe non-stick cushion le mesh belts alo trays ne dzodoƒe ƒe dzoxɔxɔ ≤260 ° C (dzoxɔxɔ sue ƒuƒu, binder ɖeɖe, slurry dɔyɔyɔ) — na demolding kple picking nyuie wu. Wode se ɖe enu vevie le dzoxɔxɔ si le titina/kɔkɔ (300-950°C) me — PTFE gblẽna si ɖea aɖi HF kple perfluoroisobutylene ɖe go, si gblẽa nu le dɔwɔnuwo ŋu eye wòhea aɖi si wua ame vɛ. Dedienɔnɔ ƒe gɔmeɖose: ne dzodoƒea ƒe dzoxɔxɔ me mekɔ o alo womate ŋu aka ɖe edzi be wòade 260°C o la, mègazãe o. Nɔnɔme veviwo: subɔsubɔdɔ si yia edzi -70°C va ɖo 260°C, ɣeyiɣi kpui aɖe ƒe 300°C; non-stick kple atikewo ƒe dɔmawɔmawɔ nyuie si gbɔ eme; elektrikŋusẽ ƒe xɔxlɔ̃ nyuie ŋutɔ; ʋuʋudedi si le bɔbɔe (~ 0.04); fiberglass gɔmeɖoanyi naa tensile ŋusẽ gã.

Nyati sia ƒo nu tso fli ƒe duƒuƒu ƒe didime si bɔ na Teflon ƒe dzoxɔxɔ gã avɔ impregnation wɔwɔ fli ŋu. Duƒuƒu ƒe didimewo: nu tsɛ siwo wozãna ɖaa (0.08-0.30mm) le 0.5-3 m/min, li ke le 1-3 m/min; nusiwo le kpekpem/siwo me wode tsi geɖe (≥0.4mm) le 0.3-1 m/min; ka siwo wɔa dɔ nyuie ŋutɔ siwo me dzodoƒe didiwo le ate ŋu aɖo 3-6 m/min gake dɔwɔnu siwo bia nu geɖe. Dɔwɔwɔ ƒe mɔxenuwo: ƒuƒu kple sintering bia be wòanɔ anyi (PTFE hiã 1-3 min le 380-400°C; esi mesɔ gbɔ o hea adhesion/cracking nyuie o); wokpɔa duƒuƒu to ɣeyiɣi suetɔ kekeake si woatsɔ aƒui/atsɔe aƒu gbe le dzodoƒe ƒe didime si woɖo ɖi te. Nusiwo wotsɔ wɔa nu ƒe mɔxenuwo: nu sesẽ/viscosity ƒe kaka siwo lolo la gena ɖe eme blewu; avɔ siwo le ɣie/siwo le ʋeʋẽm la xɔa tsi eye wotsɔa dzoxɔxɔa yia teƒe bubu vivivi; avɔ gbadza siwo ƒe amadede ƒe vovototo le nugbɔ kple titina bɔbɔe si bia be woaɖe duƒuƒu dzi akpɔtɔ. Dɔwɔnuwo kple nyonyome ƒe asitsatsa: dzodoƒe didi siwo me nuto vovovowo le ɖea mɔ na duƒuƒu si lolo wu.

Nyati sia ƒo nu tso vovototo siwo le PTFE emulsions siwo wowɔ to suspension polymerization vs dispersion polymerization dome ŋu. Numekɔkɔ: suspension polymerization mate ŋu awɔ PTFE emulsion tẽ o; PTFE emulsion vavãtɔ tsoa kaka polymerization me ko. 'Suspension-mɔnu emulsion' nye nyateƒe tsi suspension anyigba suspension-polymerized resin micropowders. Dispersion polymerization (primary emulsion): nusue siwo le dzogoe ene me (0.1-0.3μm, mama kpuie), siwo wotsɔ perfluorinated surfactants li ke, molecule ƒe kpekpeme si lolo ŋutɔ (>94% crystallinity), fibrillation sesẽ, bia 380°C sintering be woawɔ film sesẽ si yia edzi.

Nyati sia dzro ŋusẽ si platinum catalyst ƒomevi kple eƒe susu tsɔtsɔ ɖe crosslinking kinetics of addition-cure silicone rubber ŋu ​​me. Nusiwo naa nu ʋãna ƒomeviwo: Speier nusi naa nu ʋãna (chloroplatinic acid, Pt4+) hiã be woaɖee dzi akpɔtɔ va ɖo lã ƒomevi siwo me valent sue le siwo le dɔ wɔm, siwo wɔa dɔ abe nusi naa nu ʋãna ene; Karstedt ƒe nusi naa nu ʋãna (Pt0 kple divinyltetramethyldisiloxane) gena ɖe nusiwo naa nu ʋãna ƒe tsatsam me tẽ. Ƒomevi ƒe ŋusẽkpɔɖeamedziwo: Speier ɖea induction ɣeyiɣi si dze ƒã fiana kple S-nɔnɔme ƒe dɔyɔyɔ ƒe ʋuʋudedi (blewu kaba, kabakaba emegbe) kple dɔwɔwɔ ƒe ŋusẽ si dze abe ɖe wòkɔ wu ene; Karstedt ɖea induction aɖeke fiana o, gɔmedzedze ƒe agbɔsɔsɔme si kɔkɔ kple exotherm ɖaɖɛ, activation ŋusẽ si bɔbɔ ɖe anyi wu.