Cov khoom ntawm polyethylene yuav tau muab faib mus rau hauv mechanical, tshuaj, hluav taws xob, kho qhov muag, thiab thermal zog.
Polyethylene yog tsawg zog, hardness thiab rigidity, tab sis muaj ib tug high ductility thiab tej yam zog raws li zoo raws li cov uas tsis muaj kev sib txhuam. Nws qhia tau hais tias muaj zog nkag nyob rau hauv pheej quab yuam, uas yuav tsum tau txo los ntawm tas li ntawd ntawm luv luv fibers. Nws pom tau tias waxy thaum kov.
Lub usefulness ntawm polyethylene yog txwv los ntawm nws melting point ntawm 80 ° C (176 ° F) (HDPE, hom uas tsis muaj crystalline softens ua ntej lawm). Rau cov coj mus muag qib ntawm medium- thiab high-density polyethylene lub melting point yog feem ntau nyob rau hauv ntau 120 mus rau 180 ° C (248 rau 356 ° F). Lub melting point rau nruab nrab, coj mus muag, tsawg-ceev polyethylene yog feem ntau 105 rau 115 ° C (221 rau 239 ° F). Cov kub sib txawv xav nrog lub hom polyethylene.
Polyethylene muaj nonpolar, nyeem, siab molecular yuag hydrocarbons. Yog li ntawd, nws cov tshuaj coj tus cwj pwm yog zoo li paraffin. Tus neeg macromolecules tsis covalently txuas. Vim hais tias ntawm lawv cov yam molecular qauv, lawv yuav crystallize; zuag qhia tag nrho polyethylene yog cov crystalline. Dua crystallinity nce ceev thiab cov neeg kho tshuab thiab tshuaj stability.
Feem ntau cov LDPE, MDPE, thiab HDPE qib tau zoo heev tshuaj lom neeg kuj, lub ntsiab lus lawv yeej tsis rov los ntawm muaj zog acids los yog muaj zog bases, thiab yog resistant rau maj oxidants thiab txo cov kab mob. Crystalline kuaj tsis yaj nyob hauv chav tsev kub. Polyethylene (lwm yam tshaj li tus ntoo khaub lig-txuas polyethylene) feem ntau yuav ua neej ntawm kom kub nyob rau hauv uas muaj ntxhiab hydrocarbons xws li toluene los yog xylene, los yog nyob rau hauv chlorinated kuab tshuaj xws li trichloroethane los yog trichlorobenzene.
Polyethylene absorbs yuav luag tsis muaj dej. Cov pa roj thiab dej vapor permeability (tsuas ncov qaumteb qabteb gases) yog qis tshaj rau feem ntau yas; oxygen, carbon dioxide thiab flavorings rau lwm cov tes muaj peev xwm kis tau yooj yim.
PE yuav ua nkig thaum raug tshav ntuj, carbon dub yog feem ntau yog siv raws li ib tug UV stabilizer.
Polyethylene Burns maj mam nrog ib tug xiav nplaim muaj ib tug daj hau thiab muab tawm ib tsw ntawm paraffin (zoo li tswm ciab nplaim taws). Cov khoom tseem hlawv rau kev tshem tawm ntawm cov nplaim taws qhov twg los thiab ua ib tug nrog.
Polyethylene tsis tau nraim los yog daig ua ke tsis muaj pretreatment.
Polyethylene yog ib tug zoo hluav taws xob insulator. Nws muaj zoo mus txog qhovtwg kuj; Txawm li cas los, nws yuav yooj yim electrostatically them (uas yuav tsum tau txo los ntawm ntxiv ntawm graphite, carbon dub los yog antistatic agents).