Raws li cov khoom siv sib xyaw,unsaturated polyester resinTau zoo siv nyob rau hauv cov txheej txheem, iav fiber ntau txhawb kom qhuav, pob zeb dag, xuas pob zeb, thiab lwm daim teb. Txawm li cas los xij, cov xim daj ntawm cov resaturated resins yeej ib txwm muaj teeb meem rau cov tuam ntxhab. Raws li cov kws tshaj lij, cov ib txwm ua rau daj ntawm cov resaturated resins suav nrog cov hauv qab no:
1. Lub sijhawm Esterification synthesis txheej txheem ntawm kev ua kom sov siab, vim qhov ntsuas kub uas tsis muaj zog, qhov dav dav, qhov ntsuas kub no yooj yim tig daj vim rau thermal kev laus, cuam tshuam cov tsos ntawm cov khoom lag luam resin.
2. Yelling tshwm sim los ntawm kev nthuav tawm ntawm resin rau ulommentiolet rings yog feem ntau tshwm sim los ntawm muaj cov rings benzene tau qhia los ntawm styrene), uas tej zaum yuav yog vim muaj ntxhiab oxidation ntawm cov ntxhiab tebchaw thaum kub. Kev ua tsis zoo, yog nquag mus rau cov kev hloov hluav taws xob, ua cov khoom ntim daj.
3. Nyob rau hauv cov txheej txheem ntawm resin ntau lawm, cov ntaub ntawv raw tau raug rau cov pa oxygen vim cov khoom sib khi ua haujlwm ntawm lub cuab yeej. Cov molecular chart of undaturated polyester tsis tsuas yog pawg neeg ester, thiab antelope pab pawg, tab sis kuj muaj cov nyiaj sib piv thiab cov nplhaib uas muaj ntxhiab. Nws undergoes thermal oxidative tsis, thiab cov kev ua tau zoo yog tias cov xim ntawm lub pas dej hloov daj.
4. Cov cawv ntawm cov quav ntxiv xws li antioxidants, tshuaj tua neeg polymities, thiab hloov kho cov tshuaj tua kab mob yog hloov mus rau hauv nitroxide dawb radicals rau xim cov khoom. Feem ntau siv polymerization inhibitors, xws li hydroquinone, yog oxidation mus rau hauv cov ntsiab lus, uas lawv tus kheej muaj xim, yog li cuam tshuam cov xim ntawm cov cob. Qee cov tuam ntxhab ntawm kev kho cov neeg sawv cev tseem siv acyl peroxide-tertiary amine tshuab thiab ketone peroxide whoap tshuab. Xim, yooj yim-xim Resin.
Ntawm chav kawm, muaj lwm cov laj thawj uas ua rau lub resin tig daj. Feem ntau hais lus, thermal oxygen thiab ultraviolet rays yog cov laj thawj tseem ceeb rau kev daj. Saturated dibasic acid (lossis acid anthydride) yog siv es tsis muaj ntxhiab did (lossis cov xim ntawm cov chaw cob muaj zog, tab sis xav txog ntau yam xws li Resin kev ua haujlwm thiab Tus nqi, hom txujci no tsis zoo tagnrho.
Raws li cov kws tshaj lij, ntxiv rau txhaws roj hauv kev tsim tawm thiab cov txheej txheem zoo dua yog kom tiv thaiv kev daj ua kom daj dua ntawm lub polyester. Cov kws tshaj lij kev pom zoo tiv thaiv kev yub daj rau cov khoom tsis muaj txiaj ntsig yog:
Antioxidants uas tsis muaj cov amines raug xaiv, thiab thawj thiab cov antioxidiary yog siv hauv kev sib xyaw. Thawj cov tshuaj tiv thaiv kab mob antioxidants feem ntau yog cuam tshuam phenols, uas tuaj yeem ntes paines dawb radicals; Cov antioxidiary yog phosphites, uas thaum decomposing hydroperoxide, nws kuj tuaj yeem chelate hlau ions los tiv thaiv cov cob los ntawm oxidative discoloration. Yog tias koj xav ntxiv txhim kho kev yellowing thiab huab cua tiv thaiv, nws raug pom zoo kom ntxiv UV ABSORBER. Ntxiv UV AbsorBer tuaj yeem ua tau zoo rau cov kab nrib pleb ntawm cov khoom tawg, thiab kev tiv thaiv zoo heev, thiab delamination tuaj yeem txhim kho cov huab cua tsis kam Ntawm cov khoom, thiab nws muaj cov nyhuv zoo thaum siv ua ke nrog cov tshuaj tua kab mob antioxidants. Ntawm chav kawm, kev siv tshuaj tiv thaiv kab mob thiab UV tsis tuaj yeem tiv thaiv cov ntshav tsis txaus siab, thiab cov khoom lag luam uas tsis tau muaj zog, thiab cov khoom lag luam uas tsis tau muaj ntsej muag, thiab txhim kho cov khoom lag luam zoo. qib.
Peb liunsaturated polyester resinsMuaj nyob rau hauv ntau yam qauv, nrog rau cov khoom tsis daj, raws li hauv qab no:
Peb kuj tseem tsimFiberglass ncaj rov qab,Fiberglass Mats, fiberglass mesh, thiabFiberglass Woven Roving.
Tiv tauj peb:
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Lub Sijhawm Post: Lub Tsib Hlis-10-2022
