Sengoliloeng sena se bua ka mokhoa oa ho tsamaisana le lebelo la mochini oa ho roala le bolelele ba ontong ho netefatsa hore sekhomaretsi sa organosilicone se fihlella tekanyo ea pheko bakeng sa tepi ea PTFE e phahameng ea mocheso. Molao-motheo o tsamaisanang le oona: kakaretso ea nako ea bolulo t_total = bolelele ba onto bo sebetsang L ÷ lebelo la mola v e tlameha ho ba nako e fokolang e hlokahalang ea pheko. Fumana litšoaneleho tsa pheko ka DSC kapa liteko tsa sekhomaretsi tse thehang kamano ea 'mocheso - bonyane ba nako ea pheko'. Moetso o lekanang oa pheko: arola onto ka libaka, bala ti=Li/v le tcure(Ti), netefatsa ∑(ti/tcure(Ti)) ≥1. Mekhoa ea ho bala: beha libaka tsa mocheso tse nang le bolelele ba Li le mocheso Ti; seta lebelo la mola v, bala nako ea sebaka se seng le se seng sa bolulo le karolelano ea monehelo; pheta ho fihlela kakaretso ≥1 (tšireletseho margin 1.1-1.2 kgothaletswa).

Sehlooho sena se akaretsa mekhoa ea ho laola crystallinity ea PTFE barbotage ka Teflon phahameng-thempereichara lesela. Taolo ea sekhahla sa ho pholisa e tobile ebile e sebetsa hantle: Pholiso e potlakileng (ho tima) ka likharetene tse batang tsa moea, lirolara kapa litanka tsa metsi - liketane tsa limolek'hule lia hoama pele li lokisoa, li etsa likristale tse nyane tse sa phethahalang; ho roala ho bonolo, ho thata ka ts'ebetso e ntlafalitsoeng ea ho se thupeng, ho fokotsehile hanyenyane ho thatafala / ho hanyetsa ho apara. Ho pholile butle (annealing) ka karolo ea ho boloka mocheso ho 10-50 ° C / h kapa pholileng ea sebōpi - liketane tsa limolek'hule li hlophisa ka botlalo li-spherulite tse kholo tse feletseng; ho roala ho na le boima bo phahameng, ho hanyetsa ho apara ka tsela e ikhethang, litekanyo tse tsitsitseng, ho fokotseha ha maemo le ho eketseha ha brittleness.

Sengoliloeng sena se akaretsa ts'ebeliso ea lesela la mocheso o phahameng oa Teflon ka har'a libopi tsa sintering tsa moea o chesang. Ho khoneha: e ka sebelisoa e le mosamo o se nang lithupa holim'a mabanta a letlooeng kapa literei ha mocheso oa sebōpi o ≤260 ° C (ho omisa mocheso o tlaase, ho tlosoa ha li-binder, ho phekola slurry) - ho ntlafatsa ho senya le ho khetha hantle. E thibetsoe ka thata ho mocheso o bohareng / o phahameng (300-950 ° C) - PTFE e bola e lokolla HF e chefo le perfluoroisobutylene, lisebelisoa tse senyang le ho baka chefo e bolaeang. Molao-motheo oa polokeho: haeba mocheso oa sebōpi o sa hlaka kapa o ke ke oa tiisetsoa ka tlase ho 260 ° C, u se ke ua o sebelisa. Lintho tse ka sehloohong: tšebeletso e tsoelang pele -70 ° C ho 260 ° C, nako e khutšoanyane 300 ° C; ho se thupeng ho feteletseng le inertness ea lik'hemik'hale; e ntle ka ho fetisisa ea motlakase; khohlano e tlase (~ 0.04); fiberglass base e fana ka matla a phahameng a tensile.

Sengoliloeng sena se bapisa liphapang lipakeng tsa ho futhumala ha mahlaseli a infrared le mekhoa ea pheko ea ho futhumatsa moea o chesang ka mokhoa o ts'oanang oa sebopeho sa sekhomaretsi sa silicone. Mekhoa ea ho fetisa mocheso: moea o chesang o itšetlehile ka convection-conduction ka ho phahama ha mocheso o bonolo, phapang e nyenyane ea mocheso ka hare / ka ntle; IR e na le botebo bo fokolang ba ho kenella ka ho monya ka matla holim'a metsi (li-micrometer tse mashome ho isa ho tse makholo) tse etsang moepa o moepa ho tloha holimo ho ea ka hare. Liphello tsa ho tšoana ha crosslink: moea o chesang o thusa ho phekola ka hare le ka ntle ka mokhoa o ts'oanang oa crosslink density; IR e etsa hore bokaholimo bo thehe 'filimi ea letlalo' e teteaneng ka potlako e sitisang ho tsamaisa mocheso le ho sisinyeha ha ketane ea ka hare, e leng se etsang hore sekhahla sa marang-rang se fokotsehe ho tloha holimo ho ea kahare.

Sehlooho sena se akaretsa phapang pakeng tsa PTFE emulsion hlahisoang ke ho fanyeha polymerization vs dispersion polymerization. Tlhaloso: polymerization ea ho emisoa ha e khone ho hlahisa emulsion ea PTFE ka ho toba; emulsion ea 'nete ea PTFE e tsoa ho polymerization ea ho hasana. 'Suspension-method emulsion' ha e le hantle ke ho fanyeha ka metsi ha li-micropowder tsa resin tse entsoeng ka polymerized. Dispersion polymerization (primary emulsion): spherical particles (0.1-0.3μm, moqotetsane kabo), e tsitsitseng ke perfluorinated surfactants, phahameng ka ho fetisisa molek'hule boima (> 94% crystallinity), matla fibrillation, hloka 380 ° C sintering ho theha e tsoelang pele thata filimi.

Sengoliloeng sena se akaretsa mokhoa oa ho bapisa mocheso oa ho bola le halofo ea bophelo ba li-agent tsa peroxide crosslinking (BPO le DCP) le fensetere ea ts'ebetso ea ho folisa bakeng sa tepi ea Teflon. Lintlha tsa mantlha: BPO - 1-min halofo ea bophelo ho ~ 131 ° C, 1-hora ho ~ 92 ° C, 10-hr ho ~ 72 ° C; DCP — 1-mots ho ~171°C, 1-hr ho ~135°C, 10-hr ho ~115°C. Mokhoa o lumellanang: litlhoko tsa sekhomaretsi 97-99% crosslinking = 5-7 halofo ea bophelo; ho folisa nako = 5-7 × halofo ea bophelo ka mocheso oa sepheo. Ka morao-bala mocheso ho tloha moleng oa tlhahiso ea nako ea bolulo kapa nako ea ho khutlela morao ho tloha mocheso o phahameng o lumelletsoeng.

Sengoliloeng sena se akaretsa lebelo le tloaelehileng la lebelo bakeng sa mohala oa tlhahiso ea lesela la PTFE le mocheso o phahameng oa mocheso. Lebelo le tloaelehileng: 2-15 m / min, sebaka se tsitsitseng sa ts'ebetso 3-8 m / min, masela a mosesaane / mela e phahameng ea lebelo ho fihlela ho 10-15 m / min. Litšitiso tse tsoang ho ho kenella ha li-imregnation: lesela le tlameha ho tlala ka botlalo ka PTFE emulsion ho kena ka har'a li-fiber bundle insides - lebelo le phahameng haholo le baka ho se lekane ho kenngoa, tlala ea resin le likhoele tse omeletseng; emulsion viscosity, solids concentration, lesela la weave density kaofela li fokotsa sekhahla sa ho kenella, tse hlokang lebelo le tlase bakeng sa masela a teteaneng / a teteaneng. Liphasete tsa ho roala: li-passes tse ngata (2-6+) tse hlokahalang bakeng sa ho roala ho se nang sekoli; pele ho feta butle bakeng sa ho anchoring, lipalo tse latelang li ka eketseha ka mokhoa o itekanetseng.

Sengoliloeng sena se bapisa liphapang lipakeng tsa ho futhumala ha mahlaseli a infrared le ho futhumala ha moea o chesang ka har'a sebopeho se kopaneng sa sebopeho sa sekhomaretsi sa silicone. Mekhoa ea ho fetisa mocheso: moea o chesang ke convection-conduction, o bonolo ebile o tsoela pele, o etsa mocheso o itekanetseng oa mocheso; IR ke ho monya mahlaseli ka ho monya ka matla holim'a metsi (li-micrometer ho isa ho limilimithara) ho theha moepa o moepa ho tloha holimo ho ea ka hare. Liphello ho phetiso ea crosslink density: moea o chesang o lumella likarolo tse ka hare le tse ka ntle hore li kene ka har'a mocheso oa vulcanization hoo e batlang e le ka nako e le 'ngoe, ho fana ka li-uniform crosslink density hammoho le botenya; IR e etsa hore bokaholimo bo folise hang-hang ho theha letlalo le teteaneng le sitisang phetiso ea mocheso, e leng se bakang hore sekhahla se matla sa crosslink se fokotsehe ho tloha holimo kahare.

Sengoliloeng sena se akaretsa litaba tsa silika le maemo a ts'ebeliso ea lesela la fiber e phahameng ea silika. Tlhaloso ea litaba tsa silika: pontšo ea mantlha ke SiO₂ ≥96% (e tloaelehileng 96-98%, litekanyetso tsa premium> 99% ka acid leaching le sintering, e atamelang fiber e hloekileng ea quartz). Tlhahiso: Lesela la E-glass le kena ka har'a asiti e chesang ho qhaqha likarolo tseo e seng tsa silika (boron oxide, sodium oxide), ho etsa skeleton e nang le porous high-silica skeleton, ebe e siloa bakeng sa densification. Melemo ea mantlha: ts'ebeletso e tsoelang pele ho 900 ° C libakeng tse nang le oxidizing, nako e khuts'oane ka holimo ho 1200 ° C, sebaka sa ho nolofatsa haufi le 1700 ° C; botsitso ba lik'hemik'hale khahlanong le li-acids / alkali tse ngata ntle le HF le hot phosphoric acid; dielectric e tlaase kamehla le e tsitsitseng e tsitsitseng mocheso o phahameng.

Sehlooho sena se hlalosa litšobotsi tsa microstructural tsa Teflon lesela la mocheso o phahameng oa mocheso. Substrate skeleton: fiber fiber weaving texture ka plain/twill weave with high porosity (micron-scale pores ka hare ho fiber bundles le at warp-weft nodes) e fana ka sebaka bakeng sa PTFE impregnation. Coating morphology: encapsulation encapsulation e felletseng e theha 'konkreite e matlafalitsoeng'' moo likhoele tsa khalase li matlafatsang mohato, PTFE ke matrix a tsoelang pele; holim'a li-nodular microstructure ea li-nodule (likaroloana) tse kopantsoeng ke li-fibrils tse ntle tse entsoeng nakong ea sintering; lera le sa khaotseng le letenya la letlalo (tse 'maloa ho isa ho mashome a li-micron tse botenya) la PTFE e hloekileng e le mokoallo oa bohlokoa bakeng sa ho se sebetse ha lik'hemik'hale, thepa e sa thupeng le ho kenya motlakase.