Muaj ntau hom yas, suav nrog ntau lub ntsiab. Plastics raug cais raws li hauv qab no:
（1） Classification by application scope
1. Cov yas dav dav
Lub hom phiaj dav dav ntawm plastics xa mus rau ib yam ntawm cov khoom siv uas feem ntau siv nrog cov zis loj, siv dav, tus nqi qis thiab ntau yam khoom. Polyvinyl chloride, polyethylene, polypropylene, polystyrene thiab phenolic plastics yog tsib yam yas. Lwm cov polyolefins, yas yas, acrylic plastics thiab amino plastics kuj yog cov yas dav dav. Lawv cov zis tso nyiaj rau ntau tshaj li ib nrab ntawm tag nrho cov khoom siv yas thiab ua lub cev tseem ceeb ntawm kev lag luam yas.
2. Engineering yas
Engineering plastics hais txog ib hom yas uas muaj kev ua tau zoo heev thiab tuaj yeem siv los ua cov khoom siv engineering lossis cov khoom siv. Piv txwv li, polyamide, polyformaldehyde, polycarbonate, polysulfone thiab acrylonitrile butadiene styrene copolymer (ABS copolymer los yog ABS) yog engineering plastics uas zoo heev txhua yam khoom los yog kub tsis kam, corrosion kuj thiab hnav tsis kam.
3. Cov yas tshwj xeeb
Cov yas tshwj xeeb, tseem hu ua cov yas ua haujlwm, xa mus rau cov yas uas muaj qee yam tshwj xeeb ua haujlwm. Piv txwv li, nws yog siv rau conductive, sib nqus, photosensitive, anti hluav taws xob, optical fiber, kua siv lead ua, polymer sib cais membrane thiab lwm yam yas. Cov yas tshwj xeeb feem ntau tau txais los ntawm kev kho tshwj xeeb lossis kev hloov pauv ntawm cov resins rau cov yas yas lossis engineering plastics, tab sis qee qhov yog ua los ntawm cov resins tshwj xeeb uas tau tsim tshwj xeeb.
（2） Classification by heating property
1. Thermoplastic
Thermoplastics soften thaum rhuab, thiab txawm ua viscous tshuaj nrog tej yam fluidity. Nyob rau lub sijhawm no, nws muaj plasticity, uas tuaj yeem ua rau cov khoom lag luam nrog qee cov duab, uas tuaj yeem ua kom tawv thiab zoo li qub tom qab txias; Yog hais tias nws yog reheated, nws yuav ua mos dua, thiab tuaj yeem ua tiav rau hauv cov khoom ntawm lwm cov duab. Tom qab txias, nws yuav harden thiab teem. Qhov no tuaj yeem rov ua dua ntau zaus. Cov yas nrog cov cuab yeej no hu ua thermoplastics. Polyvinyl chloride, polypropylene, polystyrene, polymethylmethacrylate, polyformaldehyde, polyamide thiab polycarbonate yog tag nrho cov thermoplastics.
Thermoplastics tab tom txhim kho sai. Nyob rau hauv xyoo tas los no, ntau cov thermoplastics uas muaj cov khoom tshwj xeeb tau tsim, xws li polysulfone, fluoroplastics thiab lwm yam.
2. Cov yas thermosetting
Thaum lub sij hawm ua, thermosetting plastics tseem yuav hloov thaum xub thawj thiab muaj qee yam plasticity. Lawv tuaj yeem ua rau hauv qhov chaw nrog qee yam zoo li. Txawm li cas los xij, tom qab cov cua kub tsis tu ncua lossis ntxiv tus neeg sawv cev kho, lawv yuav harden (kho) nrog qhov tshwm sim ntawm cov tshuaj tiv thaiv, kom cov duab yuav raug kho thiab yuav tsis hloov (teem). Cov yas kho yog tawv thiab insoluble hauv hnyav. Yog hais tias nws yog reheated, nws yuav tsis soften thiab tsis muaj plasticity. Yog hais tias qhov kub thiab txias heev, nws yuav decompose. Cov yas nrog cov cuab yeej no hu ua thermosetting plastics. Phenolic plastics (bakelite), urea formaldehyde plastics (Dianyu), epoxy resin thiab unsaturated polyester yog thermosetting plastics.
（3） Classification according to the synthetic route of raw resin
1. Plastics raws li polymerized resin
Qhov sib ntxiv polymerization resin yog cov khoom siv hluavtaws tau los ntawm cov tshuaj tiv thaiv polymerization ntxiv. Feem ntau yog polyvinyl chloride, polyolefin, polystyrene, polymethylmethacrylate, polytetrafluoroethylene, thiab lwm yam.
2. Plastics raws li polycondensation resin
Phenolic resin yog ntau.
3. Plastics nrog ntuj polymer tebchaw ua raw khoom
Raws li ntuj polymer tebchaw, plastics yuav tsum tau ua los ntawm kev ua tshuaj. Nitrocellulose thiab cellulose acetate muaj ntau.