PTFEhigh-temperature fabricisacompositematerial we dɛn mek bay we dɛn impregnate ɔ kɔt glas fayba baysfabrik wit politetrafluoroethylene(PTFE).
כnda prכlכng εkspכzכn to ay tεmprachכ, tεmכ- כksidεtiv kכndishכn, כltravayol tradishכn, εn mεkanikal strεs, in strכkchכ כndagεs rεvεrsibl εjεjchεnj frכm di mכlikul to di makroskכpikl vεl.
I.MaykrostrɔkchɔralChɛnjsin diPTFEKɔtin
Molikul chen dεgradashכn εn כksidεshכn: Di kabכn-fכrin mεnchεn dεn de go כnda chen sεshכn, dipכlimεrayzeshכn, εn כksidεshכn, we de rεsultin dεkrεs in mכlikul wεyt εn di fכmeshכn כf polar grup dεm we de kכmכt na skarbonyland kכbכksil grup we de na chen εnd dεm.Dis de inkrεs di sכfεs εnεji εn de ridyus di nכn-stik prכpati dεm εn haydrofobisiti.
Chenjsinkristaliniti: Sכtchεn segmεnt dεm כnda sεkכndari kristכlayzeshn.Insay di εli stej, kristaliniti de rayz abnכmal wan, we de mek di kכt bi had εn mכr brit.As dεgradashכn de intensif, di kristכl rεjכn de dεstroy εn di strכkchכ kכlaps.
II.StrɔkchɔralChɛnjsin di GlasFaybaSɔbstret ɛnIntafɛs
Failureoffibersazing/couplingagents: Silanecouplingagentssororganicsisingingagentssontheglassfibersurfacedcompose ɛn kabɔnayz na di ay tɛmpracha fɔs, we de mek di lɔs ɔf kemikalbɔndin ɛn mɛkanikal intalɔkfɔs bitwin PTFE ɛn di glas fayba.
Intafeshal dibondin ɛn di lamineshɔn: Afta intafeshal fayl, di difrɛns insay tɛmal ɛkspɛnshɔn kɔfishin bitwin PTFE ɛn glas fayba de jenarayz tɛmal strɛs, we de lid topilin ɛn separeshɔn pan di kɔtin frɔm di fabrik, we de rilizɔt inblistering, dilaminɛshɔn, ɛn we dɛn dɔn ɛksplɔz wayt eria dɛn.
Dεgradashכn כf di glas fayba insεf: hכy tεmprachכ sεndalkaline sכbstans dεm de rεd di glas nεtwכk, we de mek maykro-krak pan di fayba sכfεs εn britlεnt.Meanwhile, alkalimetaloksayd dεm na di glas fayba prεsipitεt na di tεmprachכ, indyuz strεs kכroshכn we de damej di intafεs bad bad wan εn aksεlεrayt strεngth lכs.
III.ChenjsinMakroskopikStrɔkchɔ ɛn Apɛndiks
Kɔlɔchɛnj: Di matirial de chenj smɔl smɔl frɔm wayt ɔ natural kɔlɔ to bej, brawn, ɔ ivin blak, we kin kɔmɔt frɔm kabɔnayzeshɔn pan di intafays layt, adheshon ɔf ɔrganik kɔntaminɛnt, ɛn sidyual prodakt frɔm minɔrPTFEdigradɛshɔn.
Dimensionalstabilityand flatness: Shrinkagedeformationoccus,difabriks surfacebicomeuneven,anddgescurl.Dis na di rizin fɔ mɔlikul chen disoriɛnteshɔn ɛn intafays strɛs rilis.
Surfaceroughening: Di smol smol fil de disappear, en di surface de bi rough en lossesitsgloss.In sevεr kes dεm, dεn de si pauda we dεn tכch am, we de sho se PTFEpowdering.
Mεkanikal strכkchכral kכlaps: Di mεtirial kכmplitli lכsfleksibiliti εn brεk pan fכlding.Di kכtin εkstensivli separet frכm di bεsfabrik, we de rizulta intotalכsכfכnshכnaliti.
IV.Di Esεns כf diAgingProses
Di chenj dεm we de oba kכnstכt wan prכgrεsiv prכsεs כf'kכtin dεgradashכn→intafεshal fεil→sabstεrayt dεgradashכn.'PTFElכs si nεtnεs εn dεn divεlכp krak; di glas fayba intafεys de dεstroy bifo di fayba bכdi insεf, we de lid to dεlaminεshכn; כlti mately, di entire ristructurecomes brittle, powders,and disintegrates.Kɔntrol di ɔpreshɔn tɛmpracha, avɔyd tɛmalshɔk frɔm rɔpiddɛtin ɛn kol, ɛn prɛvɛnt kɔntakt wit asid sandalkaliskan ifɛktiv wan slowdɔwn dis strɔkchɔral ej prɔses.
