Ib lub thermosetting polymer, feem ntau hu ua thermoset, yog ib qho polymer uas tau los ntawm irreversibly hardening ib tug mos mos los yog viscous kua prepolymer. Kev kho yog tshwm sim los ntawm tshav kub lossis hluav taws xob tsim nyog thiab tuaj yeem txhawb nqa los ntawm kev kub siab, los yog sib xyaw nrog cov catalyst.
piv txwv ntawm cov yas thermoset yog dab tsi?
Cov piv txwv ntawm cov thermoset yas thiab cov polymers suav nrog epoxy, silicone, polyurethane thiab phenolicNtxiv rau, qee cov ntaub ntawv xws li polyester tuaj yeem tshwm sim hauv cov thermoplastic thiab thermoset versions. … Cov thermosets sib txawv muab qhov zoo sib txawv thaum siv los ua cov khoom siv ntau lawm.
Koj tuaj yeem qhia tau li cas yog tias lub hnab yas yog thermoset?
Txhawm rau pib txiav txim siab seb cov khoom puas yog thermoset lossis thermoplastic, ua kom sov lub pas nrig (txog 500 ° F) thiab nias nws tawm tsam tus qauv. Yog hais tias tus qauv softens, cov khoom yog ib tug thermoplastic; Yog tsis yog, nws yog tej zaum thermosetting. Tom ntej no, tuav tus qauv rau ntawm ntug nplaim kom txog thaum nws taws.
Cov thermoset yas yog dab tsi?
Feem ntau, cov khoom siv thermoset yog tsim los ntawm ua kua molding txheej txheem. Cov polymers thiab lwm yam khoom siv tau muab tso rau hauv lub tank lossis cov thoob, qhov chaw uas lawv tau rhaub rau lub xeev ua kua thiab sib tov. Tom qab ntawd cov kua polymers thiab lwm yam tshuaj raug txhaj rau hauv lub pwm kab noj hniav.
Dab tsi yog thermoset yas rau menyuam yaus?
Los ntawm Cov Menyuam Kawm Ntawv
Thermosetting plastics (thermosets) xa mus rau ntau yam ntawm cov ntaub ntawv polymer uas kho, los ntawm kev sib ntxiv ntawm lub zog, kom muaj zog duaLub zog Tej zaum yuav nyob rau hauv daim ntawv ntawm tshav kub (feem ntau tshaj 200 degrees Celsius), los ntawm ib tug tshuaj tiv thaiv (ob feem epoxy, piv txwv li), los yog irradiation.
