Tshawb nrhiav PEX Yeeb Nkab: Kev Lag Luam Txawj Ntse Sib Koom
PEX yeeb nkab, tseem hu ua cross-linked polyethylene yeeb nkab, yog ua los ntawm cov khoom siv polyethylene, thiab cov qauv kab molecular ntawm polyethylene tau hloov mus rau hauv peb-dimensional network qauv los ntawm kev siv lub cev thiab tshuaj, yog li txhim kho kev ua haujlwm ntawm polyethylene. Nws cov ntaub ntawv tseem ceeb yog HDPE, nrog rau cov neeg pib, cov neeg sawv cev sib txuas, cov khoom siv hluav taws xob thiab lwm yam pabcuam. Yog tias muaj cov cai tshwj xeeb, lwm tus neeg hloov kho kuj tuaj yeem muab ntxiv. Cov kav dej PEX tam sim no yog thawj peb hom, thiab qhov kev ua tau zoo ntawm peb hom PEX kav dej tsis zoo ib yam, feem ntau tshwm sim nyob rau hauv qhov sib txawv ntawm qhov kub tsis kam (lub zog thermal), nkag siab, thiab kev ntxhov siab tawg tsis kam. Feem ntau hais lus, nyob rau hauv cov qauv macromolecular, cov macromolecules ntawm ob-dimensional network qauv yog ib qho yooj yim rau thermally txav, thaum lub macromolecules ntawm peb-dimensional lub cev qauv yog me ntsis nyuaj rau thermally txav. Cov macromolecules ntawm PEXa feem ntau yog ob-dimensional network qauv, thaum lub macromolecules ntawm PEXb thiab PEXc feem ntau yog peb-dimensional lub cev qauv.
