1. Khoom Qhia Txog
Polyethylene (PE) yog thermoplastic resin tau los ntawm polymerization ntawm ethylene. Nyob rau hauv kev lag luam, cov qauv copolymers ntawm ethylene thiab ib qho me me ntawm alpha olefins kuj suav nrog. Polyethylene tsis muaj tsw, tsis muaj kuab lom, thiab pom tau tias zoo li siv quav ciab. Nws muaj kev kub tsis txaus (qhov kub tshaj plaws yog li ntawm -100 ~ -70 degrees C). Nws muaj stability stability tshuaj thiab tuaj yeem feem ntau cov kua qaub thiab alkali yaig. Nyob rau hauv qhov kub thiab txias, nws yog qhov hnyav hauv hnyav, muaj dej txaus thiab hluav taws xob zoo heev. Nyob rau lub Kaum Hlis 27, 2017, lub koom haum WHO International Cancer Research Institute tau luam tawm ib daim ntawv teev cov carcinogens rau ntawm 3 hom mob carcinogens.
2. Paub meej
Ib hom polyethylene (PE) yas uas peb nquag siv yog polyethylene (PE). Polyethylene yog cov qauv nyuaj ntawm polymer, thiab nws tseem yog qhov feem ntau siv cov polymer. Nws yog ua los ntawm rov qab - CH2 - chav sib txuas. Polyethylene yog tsim los ntawm qhov sib ntxiv ntawm ethylene (CH2 = CH2) rau polymerization.
Qhov kev ua tau zoo ntawm polyethylene nyob ntawm txoj kev nws yog polymerized. High density polyethylene (HDPE) yog tsim los ntawm Ziegler-Natta polymerization nyob rau hauv nruab nrab siab (15-30 atmospheric siab) organic sib txuas. Nyob rau hauv cov kev mob, polythene molecules polymerized yog linear, nrog ib tug ntev molecular saw thiab molecular luj ntawm 175,000 txhiab. Yog hais tias nws nyob ntawm kev kub siab (100-300MPa) thiab siab kub (190 - 210 C), dawb radical polymerization nyob rau hauv peroxide catalysis yuav tsim tsawg ntom polyethylene (LDPE), uas yog branched saw qauv.
Cim npe nrov: PE txhaj tshuaj yas, Tuam Tshoj, tuam ntxhab, lwm tus neeg, lub Hoobkas, hloov kho, ua nyob rau hauv Suav teb
