Irabha ye-EPDM (irabha ye-ethylene propylene diene monomer) iwuhlobo lwerabha yokwenziwa esetshenziswa ezinhlelweni eziningi.Ama-Diene asetshenziswa ekwenzeni amarabha e-EPDM yi-ethylidene norbornene (ENB), i-dicyclopentadiene (DCPD), ne-vinyl norbornene (VNB).Ama-4-8% alawa ma-monomers asetshenziswa ngokujwayelekile.I-EPDM iyirabha ye-M-Class ngaphansi kwe-ASTM ejwayelekile D-1418;isigaba se-M sihlanganisa ama-elastomer aneketango eligcwele lohlobo lwe-polyethylene (i-M isuselwa egameni elifanele kakhulu i-polymethylene).I-EPDM yenziwe nge-ethylene, i-propylene, ne-diene comonomer eyenza ukuxhumanisa nge-sulfur vulcanization.Isihlobo sangaphambili se-EPDM i-EPR, irabha ye-ethylene propylene (ewusizo kumakhebuli kagesi ane-voltage ephezulu), engaphumi kunoma yiziphi izandulela ze-diene futhi ingaxhunywa kuphela kusetshenziswa izindlela eziqinile njengama-peroxides.
Njengama-rubber amaningi, i-EPDM ihlale isetshenziswa ehlanganiswe nezigcwalisi ezifana ne-carbon black ne-calcium carbonate, enamapulasitiki afana namafutha kapharafini, futhi inezinto eziwusizo zenjoloba kuphela lapho ixhumene.Ukuxhumanisa ngokuvamile kwenzeka nge-vulcanisation nesibabule, kodwa futhi kwenziwa ngama-peroxides (ukumelana nokushisa okungcono) noma ngama-phenolic resins.Imisebe enamandla amakhulu efana nemishayo yama-electron ngezinye izikhathi isetshenziselwa ukukhiqiza amagwebu nocingo nekhebula.
Isikhathi sokuthumela: May-15-2023