epdm o nplhaib
Ethylene Propylene Diene Monomer (EPDM)
Ethylene Propylene Roj Hmab (EPR) yog tus Copolymer ntawm ethylene thiab propylene. Tsis tas li ntawd, EPDM nws yog terpolymer ntawm ethylene thiab propylene nrog ib qho me me ntawm peb tus monomer (feem ntau yog diene) tso cai rau vulcanization nrog leej faj. Feem ntau, EPDM muaj kev tiv thaiv zoo heev rau ozone, tshav ntuj thiab huab cua, thiab muaj qhov hloov tau yooj yim ntawm qhov kub tsis tshua muaj, kev siv tshuaj lom neeg zoo (ntau cov kua qaub kua qaub thiab alkalis nrog rau cov kuab tshuaj polar) thiab zoo hluav taws xob rwb thaiv tsev.
Kho system: Peroxide-kho
Cov Qauv ntawm EPDM feem ntau yog kho tau leej faj. Kev kho cov xim sulfur-tebchaw muaj cov khoom hloov tau yooj yim dua tab sis nws muaj qhov ua kom tawv dua thiab muaj qhov ua kom qis dua qhov tau teev cia nrog qhov ntsuas kub. Peroxide-kho EPDMs muaj kev tiv thaiv zoo dua ntawm tshav kub thiab kev txo qis dua. Nws ua raws li kev siv sijhawm ntev, tshwj xeeb tshaj yog rau cov tshuab raj hauv kev tsim kho kev lag luam, tab sis nws kim dua thiab nyuaj rau kev tsim khoom ntau dua li cov tshuaj sulfur-kho EPDMs.
Ntau Yam Kub:
Cov Qauv Hluav Taws Xob Qis: -55 ° C (-67 ° F) Cov Qauv Kev Ntsuas Kub: 125 ° C (257 ° F)
