Dab tsi yog thermoplastics?
Thermoplastics yog ib chav kawm ntawm cov yas uas yog yas ntawm qhov kub thiab txias, solidify tom qab txias, thiab tuaj yeem r.epentawm tus txheej txheem no. Cov qauv molecular yog tus cwj pwm los ntawm cov kab hluav taws xob sib xyaw ua ke, uas feem ntau tsis muaj cov pab pawg ua haujlwm, thiab tsis ua rau cov kab sib txuas sib txuas sib txuas thaum ua kom sov. Cov khoom pov tseg tuaj yeem rov ua dua rau hauv cov khoom tshiab tom qab rov ua dua tshiab. Lub ntsiab ntau yam yog polyolefins (vinyls, olefins, styrenes, acrylates, fluorine-muaj olefins, thiab lwm yam), cellulose, polyether polyesters thiab Aromatic heterocyclic polymers, thiab lwm yam.
Lus txhais
Thermoplastics yog cov yas siv dav tshaj plaws. Lawv yog formulated nrog thermoplastic resin ua lub ntsiab tivthaiv thiab ntau yam additives. Nyob rau hauv tej yam kub thiab txias, cov yas yuav soften los yog yaj mus rau hauv ib qho zoo, thiab cov duab tseem tsis hloov tom qab txias; lub xeev no tuaj yeem yog repeated ntau zaus thiab ib txwm muaj plasticity, thiab qhov no repetition tsuas yog hloov lub cev, uas yog hu ua thermoplastic. yas.
Xws li polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyoxymethylene, polycarbonate, polyamide, acrylic yas, lwm yam polyolefins thiab lawv cov copolymer, polysulfone, polyphenylene ether
Structure Classification
Cov thermoplastics tuaj yeem muab faib ua cov khoom siv dav dav, cov yas engineering, thiab cov yas tshwj xeeb raws li lawv cov kev ua tau zoo, ntau yam kev siv, thiab ntau yam ntawm cov tshuab molding.
Cov yam ntxwv tseem ceeb ntawm cov khoom siv dav dav yog: daim ntawv thov dav, kev ua haujlwm yooj yim, thiab kev ua haujlwm zoo. Xws li polyethylene (PE), polyvinyl chloride (PVC), polypropylene (PP), polystyrene (PS), acrylonitrile-butadiene-styrene (ABS) kuj hu ua "tsib lub hom phiaj plastics".
Cov yam ntxwv ntawm engineering plastics thiab cov yas tshwj xeeb yog: qee cov qauv thiab cov khoom ntawm cov polymers siab yog qhov tshwj xeeb tshaj yog, los yog cov txheej txheem molding yog qhov nyuaj, thiab lwm yam, thiab feem ntau yog siv hauv kev lag luam engineering lossis tshwj xeeb teb thiab sijhawm. Lub ntsiab engineering plastics yog: nylon (Nylon), polycarbonate (PC), polyurethane (PU), polytetrafluoroethylene (Teflon, PTFE), polyethylene terephthalate (PET), thiab lwm yam, cov yas tshwj xeeb xws li "synthetic heart li qub" thiab "cov pob qij txha" xws li "kev kho mob polymers".