Labẹ iwọn otutu ti o ga, awọn ipo igbona-oxidative, ultravioletradiation, ati atupa ẹrọ, eto rẹ labẹ awọn iyipada ti o ṣee ṣe iyipada lati inu moleculartothemacroscopiclevel.
I.MicrostructuralChangesinthePTFECoating
Molecularchaindegradationandoxidation: Thecarbon-fluorinemainchain ti o wa labẹ awọn ọna ṣiṣe,depolymerization,atioxidation, Abajade idinku ninu molekula iwuwo ati idasile ti awọn ẹgbẹ polarsuchascarbonylandcarboxylgroupschainends
Awọn iyipada sicrystallinity: Awọn ọna kukuru labẹ ile-ẹkọ giga ile-ẹkọ giga. Ni ipele ibẹrẹ, crystallinity dide ni deede, eyiti o fa ki ibora naa di lile ati diẹ sii.
Idibajẹ ti microscopicmorphology: Ibajẹ ati isunku ti ipilẹṣẹ lọpọlọpọ micro-cracksati awọn ihò pinho, awọn ikanni ibaje.
Ikuna awọn ifisilẹ/awọn idapọmọra: Silanecouplingagentsororganicizingagentsontheglassfibersurface decomposeandcarbonizeemperatures first,nfa awọn ipadanu ti kemikali ati ẹrọ idawọle laarin PTFE ati gilaasifiber.
Interfacialdebonding ati delamination: Lẹhin ikuna, iyipada ninu awọn ilodisi iwọn otutu laarin PTFE ati gilaasifibergene nfa aapọn gbigbona, itọka itọka ati ipinya ti ẹṣọ lati ile-iṣẹ iṣelọpọ, abajade ni blistering, delamination, awọn agbegbe funfun ti a fi silẹ.
Ibajẹ ti gilasifiberiti funrarẹ: iwọn otutu ati awọn ohun elo ti o nbọ nẹtiwọki nẹtiwọki gilasi, ti o nfa micro-cracksonfiber lori oju-oju ati idamu.
III.AyipadaMacroscopicStructureati Irisi
Iyipada Awọ: Awọn ohun elo diẹdiẹ yipada lati funfunoritsnatural awọ sibeige, brown,orevenblack, abajade lati inu erogba ti inu ile-ipin, ifaramọ ti awọn ohun elo eleto, ati awọn ọja to ku lati ibaje PTFE.
Iduroṣinṣin iwọn ati aipin: isunmọ alaye n ṣẹlẹ, oju-ọrun ti o wa ni oju-ọrun ti di aiṣedeede, ati idasikẹ.
Surfaceroughening: Thesmoothfeeldisappears,ati awọn oju-oju diroughandlosesitsgloss.Inseverecases,powderingisorabi nigbati o ba farakàn, nfihan PTFEpowdering.
Mechanicalstructural Collapse: Thematerialcompletelylossflexibility and breaksuponfolding.Thecoatingextensively yaparate fromthebasefabric,asejade sinutotallossof iṣẹ-ṣiṣe.
IV.EssenceoftheAgingProcess
Theabovechangesconstituteaprogressiveprocessiveprocessof'coating degeneration→interfacialfailure→ substratedegradation.'PTFElosesitsinertnessand Developmentscracks;glassfiberinterface ti bajẹ niwajufiberbodyitself,asiwaju latidelamination;ultiti mately, gbogbo eto di brittle, lulú, ati awọn tituka. Ṣiṣakoso awọn iwọn otutu ti n ṣiṣẹ, yago fun gbigbona gbigbona lati gbigbona gbigbona ati itutu agbaiye, ati idilọwọ awọn olubasọrọ pẹlu acidsandalkaliscaneffectively slow down thisstructuralaging ilana.
Ti o ba fẹ lati ni imọ siwaju sii nipa awọn alaye ni pato, awọn oju iṣẹlẹ ohun elo, ati awọn aṣayan isọdi fun awọn ọja ni kikun — pẹlu PTFEhigh-Temperaturefabric, PTFEhigh-Temperaturetape, Teflonhigh -awọn igbanu iwọn otutu, awọn ẹrọ afọwọṣe ti ko ni iran, PTFEfabric-apa kan, awọn iyipada iwọn otutu ti o ga, ati gilaasi iwọn otutu giga - jọwọ lero ọfẹ lati kan si nipasẹ awọn ikanni atẹle:
