Qhov Tseem Ceeb Qhov txawv - Polyester Resin vs Epoxy Resin
Polyester resin thiab epoxy resin yog ob qho khoom siv polymer matrix, tshwj xeeb tshaj yog hauv kev tsim cov fiber ntau. Feem ntau siv fiber ntau muaj xws li iav thiab carbon fibers. Hom fiber ntau thiab polymer matrix system yog xaiv raws li cov txheej txheem kawg ntawm cov khoom kawg. Qhov sib txawv tseem ceeb ntawm polyester resin thiab epoxy resin yog tias epoxy resin muaj cov khoom nplaum thaum polyester resin tsis muaj cov khoom nplaum.
Polyester Resin yog dab tsi?
Polyester resin yog siv dav hauv kev tsim fiberglass-reinforced plastics (FRP) profiles, uas yog siv rau kev siv engineering thiab ua FRP rebars. Polyester resins tuaj yeem siv los ua cov khoom siv dag zog thiab ua cov tshuaj tiv thaiv corrosion polymer. Unsaturated polyester cob yog feem ntau siv hom polyester cob uas muaj ob-covalent bonds nyob rau hauv nws cov polymer chains.
Daim duab 01: Unsaturated Polyester Resin
Cov khoom ntawm resin tuaj yeem ua raws li cov kua qaub monomer siv hauv cov tshuaj tiv thaiv polymerization. Cov khoom zoo dua qub thiab lub cev muaj zog tuaj yeem tau txais hauv orthophthalic, isophthalic, thiab terephthalic polyesters. Cov resin no feem ntau yog xim ntsuab rau xim ntsuab. Txawm li cas los xij, nws muaj peev xwm txiav txim siab xim los ntawm kev siv cov pigments. Polyester resins kuj sib xws nrog cov khoom siv. Polyester resins tuaj yeem kho tau ntawm chav tsev kub lossis kub dua. Qhov no nyob ntawm polyester formulation thiab ntawm cov catalyst siv thaum lub sij hawm tsim khoom. Yog li ntawd, lub iav hloov pauv kub ntawm polyester resin txawv ntawm 40 txog 110 ° C.
Y Epoxy Resin yog dab tsi?
Epoxy resin yog siv dav siv polymer matrix; nws yog tshwj xeeb tshaj yog siv nyob rau hauv zus tau tej cov carbon fiber-reinforced khoom nyob rau hauv structural engineering daim ntaub ntawv. Epoxy resins paub zoo rau lawv cov khoom nplaum nrog rau lawv lub peev xwm ntxiv dag zog. Cov resins yog siv los ua cov nplaum rau khi procured fiberglass reinforced yas (FRP) strips rau pob zeb. Tsis tas li ntawd, epoxy resins yog siv rau cov nplooj ntawv fiber ntau qhuav hauv daim teb thiab tom qab ntawd kho hauv qhov chaw. Qhov no thaum kawg muab lub zog los ntawm kev ua raws li cov matrix thiab ua cov nplaum uas tuav cov ntawv fiber ntau ntawm cov substrate.
Daim duab 02: Diglycidyl ether ntawm bisphenol-A epoxy resin qauv
Epoxy resins kuj tseem siv los ua FRP tendons thiab FRP nyob cables rau txuas hniav. Thaum piv rau polyester resin, epoxy resin nqi ntau dua, uas txwv tsis pub nws siv hauv kev tsim cov FRP loj dua. Epoxy resins muaj ib lossis ntau pawg epoxide. Yog tias epoxy yog ib yam khoom ntawm cov tshuaj tiv thaiv ntawm bisphenol A thiab epichlorohydrin, nws raug xa mus rau bis A epoxy. Epoxies ua los ntawm alkylated phenol thiab formaldehyde yog hu ua novolacs. Tsis zoo li polyesters, epoxy resins kho nrog acid anhydrides thiab amines los ntawm condensation polymerization. Epoxy resins muaj corrosion kuj zoo heev thiab tsis tshua muaj thermal cracking. Raws li thermosetting resins uas tuaj yeem siv rau hauv 180 ° C lossis siab dua, epoxies tau siv dav hauv kev lag luam aerospace. Epoxies tuaj yeem kho tau ntawm chav tsev kub lossis kub siab, uas nyob ntawm cov monomers siv hauv cov txheej txheem tsim khoom. Feem ntau, tom qab kho epoxy resin composites ntawm qhov kub thiab txias muaj ntau dua iav hloov kub. Yog li ntawd, lub iav hloov pauv kub ntawm epoxy resin nyob ntawm kev tsim thiab kho qhov kub thiab txias tuaj yeem nyob rau hauv thaj tsam ntawm 40-300 ° C. Epoxy resins yog ntshiab rau amber xim.
Qhov txawv ntawm Polyester Resin thiab Epoxy Resin yog dab tsi?
Polyester Resin vs Epoxy Resin |
|
| Polyester resin yog tsim los ntawm dawb-radical polymerization. | Epoxy resin yog tsim los ntawm condensation polymerization. |
| Adhesive Properties | |
| Polyester resins tsis muaj cov khoom nplaum. | Epoxy resins muaj cov khoom nplaum. |
| Tshuaj kho siab heev. | Nyob qis qis. |
| Ib puag ncig Durability | |
| Environmental durability is low. | Environmental durability yog siab. |
| Daim ntawv thov | |
| Polyester resins tsis tshua siv rau hauv cov ntawv thov thermal. | Epoxy resins feem ntau yuav siv rau hauv cov ntawv thov thermal. |
| iav hloov pauv kub | |
| iav hloov kub yog 40 txog 110 ° C. | iav hloov kub yog 40-300 ° C. |
| Polyester resin tsis kim. | Epoxy resin yog kim. |
| Txoj kev phem | |
| Polyester resin yog tshuaj lom heev. | Epoxy resin tsis muaj tshuaj lom. |
Summary – Polyester Resin vs Epoxy Resin
Ob leeg polyester resin thiab epoxy resin yog ob lub polymer matrix cov ntaub ntawv dav siv hauv kev tsim cov fiber ntau sib xyaw rau kev siv engineering. Polyester resin yog tsim los ntawm dawb radical polymerization ntawm dibasic organic acids thiab polyhydric alcohols nyob rau hauv lub xub ntiag ntawm catalysts, whereas epoxy resins yog tsim los ntawm lub condensation polymerization ntawm bisphenol A thiab epichlorohydrin. Polyester resins muab lub zog thiab corrosion kuj, qhov epoxy resins muab cov khoom nplaum, lub zog, thiab kev ruaj ntseg ib puag ncig. Qhov no yog qhov txawv ntawm polyester resin thiab epoxy resin.
Download PDF Version ntawm Polyester Resin vs Epoxy Resin
Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline hom phiaj raws li daim ntawv ceeb toom. Thov download PDF version ntawm no Qhov txawv Ntawm Polyester Resin thiab Epoxy Resin
