Muaj ntau hom hluavtaws resins.
Synthetic resin industrial khoom tuaj yeem muab faib ua cov hom phiaj dav dav thiab cov hom phiaj tshwj xeeb. General-purpose resins muaj cov zis loj thiab tus nqi qis. Lawv feem ntau yog siv rau hauv cov khoom siv los yog cov khoom siv ruaj khov. Cov neeg sawv cev ntau yam yog polyethylene, polypropylene, polyvinyl chloride, polystyrene thiab ABS. Cov resin tsim muaj me me tso zis thiab tus nqi ntau lawm. Piv txwv li, nws tuaj yeem hloov cov hlau hauv tshuab, hluav taws xob, tsheb thiab lwm yam haujlwm. Engineering plastics yog nyob rau hauv qeb ntawm tshwj xeeb resins. Cov yas yas tseem ceeb suav nrog polyamide, polycarbonate, polyoxymethylene, polybutylene terephthalate, hloov kho polyphenylene ether thiab polytetrafluoroethylene. Lwm hom tshwj xeeb resin yog thermoplastic elastomer, uas muaj roj hmab zoo li elasticity thiab tuaj yeem hloov kho thaum rhuab.
Raws li cov tshuaj muaj pes tsawg leeg, cov khoom siv hluavtaws tuaj yeem muab faib ua ob pawg: ib yam ntawm cov saw tseem ceeb yog tsim los ntawm aliphatic carbon atoms, cov hom phiaj dav dav ntawm cov khoom siv hauv pawg no; Lwm hom hluavtaws resins kuj muaj cov pa roj carbon atoms hauv cov saw tseem ceeb Feem ntau cov yas yas, xws li oxygen, nitrogen thiab sulfur, yog tsim los ntawm hetero-chain polymers.
Raws li kev ua haujlwm engineering, cov khoom siv hluavtaws tuaj yeem muab faib ua cov thermoplastic resins thiab thermosetting resins. Qhov sib txawv tsuas yog los ntawm cov tshuaj muaj pes tsawg leeg thiab cov qauv molecular ntawm cov polymer. Cov qauv saw molecular ntawm thermoplastic resin yog linear lossis branched, uas tuaj yeem ua plasticized (los yog softened, melted) thiab ntws tom qab cua sov, thiab tuaj yeem rov ua plasticized thiab tsim. Hom thermoplastic resins yog polyethylene, polypropylene, poly-1-butene, polyvinyl chloride, polystyrene thiab lwm yam. Thermoplastic resins tuaj yeem hloov pauv sai sai. Thermosetting resin yog lub siab molecular polymer nrog cov qauv peb sab. Nws muaj multifunctional macromolecules nyob rau hauv cov saw molecular. Nws tuaj yeem softened (los yog melted) thiab solidified (los yog matured) nyob rau tib lub sij hawm los ua insoluble, Infusible polymer. Feem ntau siv cov thermosetting resins yog phenol-formaldehyde resin (feem ntau hu ua phenolic resin), urea-formaldehyde resin (feem ntau hu ua urea-formaldehyde resin), melamine-formaldehyde resin (feem ntau hu ua melamine-formaldehyde resin), unsaturated resin, epoxy resin. polyester cob, polyurethane thiab lwm yam.
