Ni izihe mpinduka zubaka zibaho muri PTFE yubushyuhe bwo hejuru mugihe cyo gusaza?

PTFEhigh-temperaturefabricisacompositematerialmadebyimpregnatingorcoatingglassfiberbasefabricwithpolytetrafluoroethylene (PTFE).

Ubushyuhe budasanzwe, ubushyuhe bwa termo-okiside, ultravioletradiation, hamwe na mashini ya mashini, imiterere yububasha bwayo,

I.MicrostructuralChangesinthePTFECoating

Molecularchaindegradationandoxidation: Carcarbon-fluorinemainchainundergoeschainscission, depolymerisation, naoxidation, bivamoadecreaseinmolecularweight hamwe namakuru yamakuru ya polargroupssuchascarbonylandcarboxylgroupsatchainends.Iyiincreasessurfaceenergyandroperties

Impinduka zifatika: Gucisha bugufiGusekondarycrystallisation.Icyiciro cyambere, kristalliniterisesibisanzwe, bitera thecoatingtobecomeharderandmorebrittle.

Kwangirika kwa :mikorosikopi

II

Failureoffibersizing / guhuza: Silanecouplingagentsororganicsizingagentsontheglassfibersurfacedecomposeandcarbonizeathightemperaturesfirst, bitera helosofchemicalbonding na mikoranike yo gufatanya hagati yaTFEandtheglassfiber.

Interfacialdebondinganddelamination: Nyuma yimikorere idahwitse, itandukanyirizo ryimyitozo ngororamubiri hagati ya PTFEandglassfibergeneratesthermalstress, kuyobora topeelingandseparationofcoatingfricafrica, bikavamo gutondeka, gusiba, no gusobanura.

Gutesha agaciro ibyatsi: Hightemperaturesandalkalinesubstanceserodetheglassnetwork, iteramicro-cracksonthefibersurfaceandembrittlement. Hagati aho, alkalimetaloxidesintheglassfiberprecipitateathightemperatures, inducstresscorrosion

III.ChangesinMacroscopic Imiterere nuburyo bugaragara

Guhindura amabara: Thematerialgraduallychangesfromwhiteoritsnaturalcolortobeige, umukara, orevenblack, bivamo carbonisiyonike yimikorere yimikino, adhesionoforganiccontaminants, hamwe na progaramu yumusaruro uva kuriPTFEdegradation.

Dimensionalstability andflatness: Shrinkagedeformationoccurs, thefabricsurfacebecomesuneven, andedgescurl. Ibi

Surfaceroughening: Thesmoothfeeldisappears, andthesurfacebecomesroughandlosesitsgloss.

Mechanicalstructuralcollapse: Thematerialcompletelylosesflexibility andbreaksuponfolding.

IV

Theabovechangesconstituteaprogressiveprocessof 'coatingdegradation → interfacialfailure → substratedegradation. ' PTFElosesitsinertness hamwe niterambere ryiterambere; mately, theentirestructurebecomesbrittle, ifu, nadisintegrates.Kugenzura igenzura ryubushyuhe, kwirinda imiti yubushakashatsi bwimbaraga, hamwe no gukumira ibicuruzwa,

TheaboveinformationisprovidedbyJiangsuOKNewMaterialIkoranabuhangaCo., Ltd.

Niba wongeyeho -temperaturemeshbelts, seamlessbeltingforadhesivepresses, uruhande rumwePTFEfabric, ubushyuhe bwo hejuru cyane, hamwe nubushyuhe bwo hejuru -ibikoresho byimbaraga-nyamuneka-nyamuneka

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