EPDM roj hmab (ethylene propylene diene monomer roj hmab) yog ib hom roj hmab hluavtaws uas siv rau hauv ntau daim ntawv thov.Dienes siv hauv kev tsim cov EPDM roj hmab yog ethylidene norbornene (ENB), dicyclopentadiene (DCPD), thiab vinyl norbornene (VNB).4-8% ntawm cov monomers feem ntau yog siv.EPDM yog M-Class roj hmab raws li ASTM tus qauv D-1418;M chav kawm suav nrog elastomers uas muaj cov saw hlau saturated ntawm hom polyethylene (tus M muab los ntawm cov lus tseeb dua polymethylene).EPDM yog tsim los ntawm ethylene, propylene, thiab diene comonomer uas ua rau crosslinking ntawm sulfur vulcanization.Tus txheeb ze yav dhau los ntawm EPDM yog EPR, ethylene propylene roj hmab (tseem ceeb rau cov hluav taws xob hluav taws xob hluav taws xob), uas tsis yog los ntawm cov khoom siv diene thiab tsuas tuaj yeem sib txuas nrog cov txheej txheem radical xws li peroxides.
Raws li nrog cov roj hmab feem ntau, EPDM yeej ib txwm siv nrog cov khoom ntim xws li cov pa roj carbon dub thiab calcium carbonate, nrog cov yas xws li cov roj paraffinic, thiab muaj cov khoom siv roj hmab zoo thaum sib txuas.Crosslinking feem ntau tshwm sim los ntawm vulcanisation nrog leej faj, tab sis kuj ua tiav nrog peroxides (kom zoo dua tshav kub) los yog nrog phenolic resins.Cov hluav taws xob hluav taws xob siab xws li los ntawm cov kab hluav taws xob yog qee zaum siv los ua cov foams thiab xaim thiab cable.
Post lub sij hawm: May-15-2023