Isiokwu a na-ekpuchi ngwa nke PTFE elu-okpomọkụ ákwà na carbon eriri ewepụghị mejupụtara ngwaahịa. Mkpakọ ịkpụzi: etinye n'etiti ebu na prepregs na-egbochi epoxy resin adhesion, na-enyere mfe imebi; sandwiched n'etiti ọtụtụ paịlị dị gịrịgịrị ka ịzenarị njikọ. Ịkpụzi akpa Vacuum: ihe nkiri ntọhapụ reusable n'etiti prepreg na mkpuchi iku ume, na-enye ohere ikuku gas / resin ka ọ na-eme ka peeling dị mfe mgbe ọgwụgwọ gasịrị; akụkụ textured na-enyefe udidi elu dị mma iji kwalite ịdị mma nke njikọta, na-ewepụ sanding. Mmepụta na-aga n'ihu: eriri ndị na-ebufe eriri na-enweghị nkebi na-ebu prepregs site na mpaghara kpo oku / ịpị; oyi akwa nkuchi na-ekesa nrụgide n'otu n'otu na-ebelata indentations mpaghara.

Isiokwu a na-enyocha ike nke ọgwụgwọ ire ọkụ maka mgbanwe elu PTFE ma tụnyere mmetụta na ọgwụgwọ corona na plasma. Enwere ike ime: ire ọkụ nwere ike gbanwee PTFE mana a naghị eji ya eme ihe na ụlọ ọrụ - ihe egwu nchekwa (PTFE decomposes na-ahapụ HF na-egbu egbu na perfluoroisobutylene); arụmọrụ oke (ike elu naanị 30-35 mN / m, na-etolite oyi akwa oke na-adịghị ike). Usoro na-arụ ọrụ: ire ọkụ - oxidation elu okpomọkụ na-agafe agafe (> 1000 ° C), ntakịrị etching, ole na ole ikuku oxygen; corona - mwepu voltaji dị elu na-emepụta ozone / oxygen na-arụ ọrụ, oxidation dị nro, njupụta ume dị ala enweghị ike imebi njikọ CF; plasma - ahụ ike dị elu / elektrọn / free radicals na-ekewa CF agbụ na otu polar graft (hydroxyl, carboxyl, amino).

Edemede a tụlere izi ezi nke ụzọ nnwale ogo atọ maka nrịbama na-enwe mmetụta silicone. Mwepụta ihe mgbaze (ọdịnaya jel) na-atụ akụkụ nke netwọkụ na-adịghị soluble site na mmịpụta Soxhlet - elele anya n'ihi akụkụ ahụ jikọtara ọnụ na-ezighi ezi dị ka crosslinks, nkenke ± 2-5%, kemịkalụ kacha ala. DSC na-atụle okpomọkụ mmeghachi omume fọdụrụnụ (α = 1-ΔHresidual / ΔHtotal) - nke a pụrụ ịdabere na ya na ntụgharị dị ala na nke ọkara mana ọ na-emebiga ihe ókè na ngbanwe dị elu n'ihi ìgwè ndị fọdụrụ na-ejedebe na-agbasa, nkwughachi <± 2%.

Edemede a na-ekpuchi ọrụ PTFE na mkpuchi mkpuchi ọkụ maka igwe ngwa agha. Usoro anọ: decomposition endothermic - PTFE depolymerizes na ~ 400 ° C na tetrafluoroethylene (oke endothermic, ~ 3,000 Celsius C ikpughe ọkụ ọkụ), na-etinye oke okpomọkụ na wepụ ike ọkụ site na mgbidi mgbidi. Ntugharị dị jụụ na mkpuchi ihe nkiri gas - gas decomposition (tetrafluoroethylene) na-abanye n'èzí site na micro-pores, na-ewepụ okpomọkụ elu; ihe nkiri gas na-asọpụta na-ekewapụ gas combustion dị elu site na mgbidi, na-ebelata ọkụ ọkụ dị nso site na> 50%; ihe nkiri gas na-agbanwe oke oyi akwa ọsọ/okpomọkụ, na-ebelata oke mbuze.

Edemede a na-ekpuchi mmetụta nke irradiation gamma-ray na nhazi na akụrụngwa PTFE. Nhazi kemịkalụ na-agbanwe: ụzarị gamma na-agbaji agbụ isi CC na agbụ akụkụ CF (G-uru 3.0-3.5), na-eme ka ọnyà dị ukwuu na-adaba na ịdị arọ molekul; na oxygen, free radicals na-etolite peroxy radicals ewebata acyl fluoride na carboxylic acid end otu (hydrolyzing ka HF). Mgbanwe ihe owuwu condensed: crystallinity na-ebili na mbụ (obere dose, mkpirisi n'agbụ megharịa) wee daa (oke dose, ntụpọ na-akpaghasị kristal); kristal lamellar na-agbaji n'ime obere kristal nwere usoro ogologo ogologo furu efu. Ihe onwunwe na-emebi emebi: elongation na nkwụsịtụ na-agbada site na 0.1 kGy na ikuku, na-efu> 90% na ~ 1kGy - ihe na-aghọ ihe siri ike ma na-agbaji; ebe mgbaze na-agbada site na 327 ° C ruo n'okpuru 310 ° C; polar dị iche iche na-ebuli dielectric mgbe niile / ọnwụ; elu na-agbanwe site na-acha ọcha gaa na isi awọ/oji nwere ọnwụ na-egbuke egbuke.

Isiokwu a na-ekpuchi ụzọ iji chịkwaa crystallinity nke mkpuchi PTFE na akwa akwa okpomọkụ nke Teflon. Nhazi ọnụego jụrụ oyi na-akachasị mma ma dị irè: ngwa ngwa jụrụ oyi (imenyụ) site na ákwà mgbochi ikuku oyi, igwe na-eme ka mmiri dị jụụ ma ọ bụ tankị mmiri - agbụ molekụla na-adaba tupu e nye ya ndokwa, na-akpụ obere kristal na-ezughị okè; mkpuchi dị nro, siri ike na arụ ọrụ anaghị arụ ọrụ nke ọma, obere ike ike / eyi nguzogide. Ngwa ngwa jụrụ oyi (annealing) site na ngalaba nchekwa okpomọkụ na 10-50 ° C / h ma ọ bụ ọkụ ọkụ - ụdọ molekụla na-ahazi n'ụzọ zuru ezu n'ime nnukwu spherulites zuru oke; mkpuchi nwere nnukwu isi ike, nkwụsi ike na-eyi pụtara ìhè, akụkụ kwụsiri ike, mbelata mgbanwe na ụbara brittleness.

Isiokwu a na-ekpuchi ngwa Teflon akwa na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ. Enwere ike ime ya: enwere ike iji ya dị ka ihe nkuku na-adịghị akwagide na eriri ntupu ma ọ bụ trays mgbe ọkụ ọkụ ≤260 Celsius C (obere okpomọkụ ihicha, ewepu ihe nkedo, ọgwụgwọ slurry) - na-eme ka nrụpụta ihe na-arụ ọrụ nke ọma. Amachibidoro nke ọma na ọkara / okpomọkụ dị elu (300-950 ° C) - PTFE decomposes na-ahapụ HF na-egbu egbu na perfluoroisobutylene, akụrụngwa na-emebi emebi ma na-ebute nsị na-egbu egbu. Ụkpụrụ nchekwa: ọ bụrụ na ọkụ ọkụ edoghị anya ma ọ bụ enweghị ike ịkwenye n'okpuru 260C, ejila ya. Njirimara isi: ọrụ na-aga n'ihu -70 ° C ruo 260 ° C, obere oge 300 ° C; oké enweghị osisi na chemical inertness; ezigbo mkpuchi eletrik; obere esemokwu (~ 0.04); fiberglass base na-enye ike tensile dị elu.

Isiokwu a na-ekpuchi ahụkarị ahịrị ọsọ nso maka Teflon elu-okpomọkụ ákwà impregnation mmepụta akara. Ụdị ọsọ ọsọ: ngwaahịa ndị dị mkpa (0.08-0.30mm) na 0.5-3 m / min, kwụsiri ike na 1-3 m / min; nnukwu / ọtụtụ impregnated ngwaahịa (≥0.4mm) na 0.3-1 m / min; ahịrị arụmọrụ dị elu nwere ogologo oven nwere ike iru 3-6 m / min mana akụrụngwa chọrọ. Usoro ihe mgbochi: ihicha na sintering chọrọ oge obibi (PTFE chọrọ 1-3 min na 380-400 ° C; ezughị ezu na-akpata nkwụsịtụ na-adịghị mma / mgbawa); A na-ekpebi ọsọ site na opekempe ihicha/oge mgbụsị akwụkwọ n'okpuru ogologo oven edoziri. Ihe mgbochi ihe: nnukwu ihe siri ike / viscosity mgbasa na-abanye nwayọọ nwayọọ; akwa / akwa akwa na-etinye mmiri mmiri ma nyefee okpomọkụ nwayọọ nwayọọ; akwa akwa na-adaba na ọdịiche agba dị n'etiti etiti chọrọ mbelata ọsọ ọsọ. Akụrụngwa na azụmaahịa dị mma: ogologo oven nke ọtụtụ mpaghara na-enye ohere ọsọ ọsọ.

Isiokwu a na-ekpuchi iche n'etiti PTFE emulsions emepụtara site nkwusioru polymerization vs dispersion polymerization. Nkọwa: polymerization nkwusioru enweghị ike ịmepụta emulsion PTFE ozugbo; ezigbo emulsion PTFE na-abịa naanị site na polymerization mgbasa. 'Ụzọ nkwusioru emulsion' bụ n'ezie nkwusioru mmiri nke nkwusioru ala-polymerized resin micropowders. polymerization mgbasa (primary emulsion): Spherical ahụ (0.1-0.3μm, warara nkesa), kwụsie ike site perfluorinated surfactants, kemgwucha molekụla arọ (> 94% crystallinity), ike fibrillation, na-achọ 380 ° C sintering na-etolite na-aga n'ihu siri ike film.

Edemede a na-enyocha mmetụta nke ụdị platinum catalyst na itinye uche na crosslinking kinetics nke mgbakwunye silicone roba. Ụdị ihe na-akpata: Speier catalyst (chloroplatinic acid, Pt⁴⁺) chọrọ mbelata na ụdị ndị dị ala na-arụ ọrụ, na-arụ ọrụ dị ka precatalyst; Karstedt catalyst (Pt⁰ nwere divinyltetramethyldisiloxane) na-abanye ozugbo na okirikiri catalytic. Mmetụta ụdịdị: Speier na-egosi oge nnabata akpọpụtara ya na usoro ọgwụgwọ ụdị S (dị nwayọ ngwa ngwa, emechara ngwa ngwa) yana ike ịgbalite pụtara elu; Karstedt egosighi nnabata, ọnụego mmalite dị elu na exotherm dị nkọ, ike ịgbalite obere.