EPDM roba (ethylene propylene diene monomer rubber) wani nau'in roba ne na roba wanda ake amfani dashi a aikace-aikace da yawa.Dienes da ake amfani da su wajen kera robar EPDM sune ethylidene norbornene (ENB), dicyclopentadiene (DCPD), da vinyl norbornene (VNB).4-8% na waɗannan monomers yawanci ana amfani da su.EPDM robar M-Class ne a ƙarƙashin ASTM misali D-1418;Ajin M ya ƙunshi elastomers masu cikakken sarkar nau'in polyethylene (M wanda ya samo daga mafi daidai kalmar polymethylene).EPDM an yi shi ne daga ethylene, propylene, da diene comonomer wanda ke ba da damar haɗin kai ta hanyar vulcanization na sulfur.Abokin farko na EPDM shine EPR, roba ethylene propylene (mai amfani ga igiyoyin lantarki masu ƙarfin lantarki), wanda ba a samo shi daga kowane madaidaicin diene ba kuma ana iya haɗa shi ta hanyar amfani da hanyoyi masu tsattsauran ra'ayi kamar peroxides.
Kamar yadda yake tare da yawancin roba, ana amfani da EPDM koyaushe tare da abubuwan cikawa irin su carbon baki da calcium carbonate, tare da masu yin robobi irin su mai, kuma yana da kaddarorin roba masu amfani kawai idan an haɗa su.Crosslinking yawanci yana faruwa ta hanyar vulcanisation tare da sulfur, amma kuma ana yin shi da peroxides (don mafi kyawun juriya na zafi) ko tare da resin phenolic.Wani lokaci ana amfani da hasken wuta mai ƙarfi kamar daga igiyoyin lantarki don samar da kumfa da waya da kebul.
Lokacin aikawa: Mayu-15-2023