Iyi ngingo ikubiyemo porogaramu ya PTFE yubushyuhe bwo hejuru mubikoresho bya karubone fibre yibicuruzwa. Gucomeka gushushanya: bishyizwe hagati yububiko na preregs birinda epoxy resin gufatira, bigafasha kumeneka byoroshye; ushyizwe hagati yibice byinshi byoroshye kugirango wirinde gufatana. Gufata umufuka wa Vacuum: kongera gusohora firime hagati yigitambaro cyo guhumeka no guhumeka, kwemerera gaze / resin kunyura mugihe gishobora gukuramo byoroshye nyuma yo gukira; Uruhande rwimura rwimura neza kugirango rutezimbere guhuza, gukuraho umucanga. Umusaruro uhoraho: imikandara ya convoyeur idafite inkoni itwara prereges binyuze mu gushyushya / gukanda; cushion layer ikwirakwiza igitutu kuringaniza kugabanya indentations zaho.

Iyi ngingo irasuzuma uburyo bwo kuvura umuriro kugirango PTFE ihindurwe kandi igereranya ingaruka nubuvuzi bwa corona na plasma. Ibishoboka: flame irashobora guhindura PTFE ariko gake ikoreshwa munganda - ibyago byumutekano (PTFE ibora kurekura uburozi bwa HF na perfluoroisobutylene); imikorere igarukira (ingufu zo hejuru gusa 30-35 mN / m, ikora imipaka idakomeye). Uburyo bukora: flame - okiside yubushyuhe bwo hejuru (> 1000 ° C), gutobora gake, amatsinda make ya ogisijeni; corona - isohoka rya voltage nyinshi itanga ozone / okisijeni ikora, okiside yoroheje, ubwinshi bwingufu ntishobora guca imigozi ya CF; plasma - ibice byinshi byingufu / electron / radicals yubusa itandukanya neza imigozi ya CF hamwe nitsinda rya polar (hydroxyl, carboxyl, amino).

Iyi ngingo igereranya ubunyangamugayo butatu bwo gukiza impamyabumenyi yo gupima silicone yumuvuduko ukabije. Gukuramo ibishishwa (ibirimo gel) bipima igice cyurusobe rudacogora binyuze mu gukuramo Soxhlet - kurenza urugero bitewe nuduce twiziritse kumubiri twibeshye nko guhuza, neza ± 2-5%, ubuziranenge bwa chimique. DSC ipima ubushyuhe bwibisigisigi (α = 1-ΔUmuntu / ΔHtotal) - byizewe mugihe gito-giciriritse ariko birenze urugero muguhinduka kwinshi kubera gukwirakwiza amatsinda asigaye, gusubiramo <± 2%.

Iyi ngingo ikubiyemo imikorere ya PTFE mumashanyarazi ya misile. Uburyo bune: Kwangirika kwa Endothermic - PTFE depolymerize kuri ~ 400 ° C kugeza tetrafluoroethylene (endothermic cyane, ~ 3000 ° C ya gaze yaka umuriro), ikurura ubushyuhe bwinshi kandi ikuramo ingufu zumuriro hejuru yurukuta. Gukonjesha Transpiration hamwe na gaze ya gaz - imyuka yangirika (tetrafluoroethylene) yinjira hanze ikoresheje micro-pore, ikuraho ubushyuhe bwo hejuru; firime ya gazi itemba itandukanya gaze yubushyuhe bwo hejuru kurukuta, igabanya ubushyuhe bwurukuta hafi ya> 50%; gazi ya gaz ihindura imipaka yumuvuduko / ubushyuhe, kugabanya isuri.

Iyi ngingo ikubiyemo ingaruka ziterwa na gamma-ray kumirasire ya PTFE nimiterere. Imiterere yimiti ihinduka: imirasire ya gamma isenya iminyururu nyamukuru ya CC nu munyururu wa CF (G-agaciro 3.0-3.5), itera urunigi runini no kugabanuka kwa molekile bikabije; muri ogisijeni, radicals yubusa ikora peroxy radicals itangiza acyl fluoride na acide karubasi ya acide (hydrolyzing to HF). Imiterere ihindagurika: ihinduka rya kristu irazamuka muburyo bwambere (ikinini gito, iminyururu migufi yongeye gutondekanya) hanyuma igwa (ikinini kinini, inenge ihungabanya kristu); kristu ya lamellar igabanyijemo uduce duto twa kristalite hamwe no kubura intera ndende. Kwangirika k'umutungo: kurambura kuruhuka bigabanuka kuva 0.1 kGy mu kirere, gutakaza> 90% kuri ~ 1kGy - ibikoresho biba bikomeye kandi byoroshye; gushonga bigabanuka kuva kuri 327 ° C kugeza munsi ya 310 ° C; amatsinda ya polar azamura gato dielectric ihoraho / gutakaza; isura ihinduka kuva cyera kugeza imvi / umukara hamwe no gutakaza gloss.

Iyi ngingo ikubiyemo uburyo bwo kugenzura ububobere bwa PTFE ku mwenda wo hejuru wa Teflon. Igipimo cyo gukonjesha kiragaragara cyane kandi gifite akamaro: Gukonjesha byihuse (kuzimya) ukoresheje umwenda ukonje, imizingo ikonjesha cyangwa ibigega byamazi - iminyururu ya molekile irahagarara mbere yo gutegekwa, ikora kristu ntoya idatunganye; gutwikira biroroshye, birakomeye hamwe nuburyo bwiza bwo gukora butari inkoni, kugabanuka gukomeye / kwihanganira kwambara. Gukonjesha buhoro (annealing) ukoresheje igice cyo kubika ubushyuhe kuri 10-50 ° C / h cyangwa gukonjesha itanura - iminyururu ya molekile itondekanya rwose muri spherulite nini yuzuye; gutwikira bifite ubukana bwinshi, kwihanganira kwambara bidasanzwe, ibipimo bihamye, kugabanya guhinduka no kwiyongera.

Iyi ngingo ikubiyemo ikoreshwa rya Teflon yimyenda yubushyuhe bwo hejuru mu ziko ryumuyaga ushushe. Ibishoboka: birashobora gukoreshwa nkudushumi twinshi ku mukandara wa meshi cyangwa tray mugihe ubushyuhe bwitanura ≤260 ° C (gukama ubushyuhe buke, kuvanaho binder, gukiza ibishishwa) - bitezimbere kumanura no gutora neza. Birabujijwe cyane ku bushyuhe bwo hagati / hejuru (300-950 ° C) - PTFE ibora kurekura ubumara bwa HF na perfluoroisobutylene, ibikoresho byangiza kandi bitera uburozi bwica. Ihame ryumutekano: niba ubushyuhe bwitanura budasobanutse cyangwa budashobora kwemezwa munsi ya 260 ° C, ntukoreshe. Umutungo wingenzi: serivisi zihoraho -70 ° C kugeza 260 ° C, igihe gito 300 ° C; gukabya gukabije kutagira inkoni na chimique; amashanyarazi meza cyane; ubukana buke (~ 0.04); base ya fiberglass itanga imbaraga zingana.

Iyi ngingo ikubiyemo umurongo wihuta wumurongo wa Teflon yubushyuhe bwo hejuru bwimyenda yo kwinjiza. Umuvuduko uringaniye: ibicuruzwa bisanzwe bisanzwe (0.08-0.30mm) kuri 0.5-3 m / min, bihamye kuri 1-3 m / min; umubyimba / ibicuruzwa byinshi byatewe (≥0.4mm) kuri 0.3-1 m / min; imirongo ikora neza hamwe nitanura rirerire irashobora kugera kuri 3-6 m / min ariko ibikoresho bisaba. Inzitizi zikorwa: gukama no gucumura bisaba igihe cyo gutura (PTFE ikenera min 1-3 min kuri 380-400 ° C; bidahagije bitera kwifata nabi / guturika); umuvuduko ugenwa nigihe gito cyo kumisha / gucumura munsi yuburebure bwa furu. Inzitizi zibintu: ibintu bikomeye / ikwirakwizwa ryinshi ryinjira buhoro; imyenda yuzuye / yuzuye ikurura amazi kandi ikohereza ubushyuhe buhoro; imyenda yagutse ikunda gutandukana hagati-hagati ibara risaba kugabanya umuvuduko. Ibikoresho hamwe nubucuruzi bufite ireme: amashyiga maremare menshi ya zone yemerera umuvuduko mwinshi.

Iyi ngingo ikubiyemo itandukaniro riri hagati ya emulisiyo ya PTFE ikorwa no guhagarikwa polymerisation vs dispersion polymerisation. Ibisobanuro: guhagarika polymerisation ntibishobora kubyara PTFE; emulioni ya PTFE nyayo ituruka gusa kuri polymerisation. 'Guhagarika-uburyo bwa emulsion ' mubyukuri ni ihagarikwa ryamazi yo guhagarika ubutaka-polymerized resin micropowders. Dispersion polymerisation (emulsion primaire): ibice bya serefegitura (0.1-0.3μm, gukwirakwiza kwagutse), bigahagarikwa na surfactants ya perfluorine, uburemere buke cyane (> 94% kristalline), fibrillation ikomeye, bisaba gucumura 380 ° C kugirango ikore firime ikomeza.

Iyi ngingo irasuzuma ingaruka za catalizike ya platine hamwe no kwibanda kuri kinetics yo guhuza-gukiza silicone rubber. Ubwoko bwa catalizike: Cataliste (Acide chloroplatinic, Pt⁴⁺) isaba kugabanuka kubinyabuzima bikora bike-bifite agaciro, bikora nkibisanzwe; Cataliste ya Karstedt (Pt⁰ hamwe na divinyltetramethyldisiloxane) yinjira muburyo bwa catalitiki. Ubwoko bwingaruka: Umuvugizi yerekana igihe cyo kwinjiza hamwe na S-yo gukiza umurongo (gahoro kare, byihuta nyuma) nimbaraga zo kugaragara cyane; Karstedt yerekana nta induction, igipimo cyambere cyambere hamwe na exotherm ikarishye, imbaraga zo gukora hasi.