derived ethylene-propylene rubber vo' vinyl monomer propylene 'ej copolymerization je orientation 'elbogh. consists 'oH cha' ethylene-propylene rubber (epm) cha' Segh epdm rubber (epdm) je.
pong ethylene propylene 'ej 20 vatlhvI' copolymerization Dumerbe' epm ~ 30 vatlhvI'. unique ngaQHa'moHwI'mey neH mIr saturate rubbers. ghaH sulfur vor, laH neH peroxide crosslinking lo'. slow vor, application vor limited Duy.
lIH epdm neH ethylene-propylene copolymers unsaturated monomers 'AY' WEJ. QaQDaq: vinyl norbornene chonaDmo', cha'logh vaj cyclopentadiene. sulfur vor, tlhoQ nagh epm. polar substituent, QI'yaH-crystalline, relative ghu'vetlh 0.86 tu'lu' ~ 0.88.
1, pov aging resistance. pe'vIl vaj pumDI' qoghlIj ozone resistance laH puS butyl rubber CR. QaQ muD resistance, 'ej pa' jul 3 DIS. sbr5 pe'vIl vaj pumDI' qoghlIj, pe'vIl vaj pumDI' qoghlIj jaj nr150 jaj, jaj 70 ghor. aging QaQ resistance. 150 ℃ nI'taHvIS lo'. resistance qantaHvIS nIvbogh 'aqnaw rubber.
2, resistance chemical corrosion. Sar polar chemicals pey, matay'DI' resistance je alkalis. hydrocarbon oils vIvup resistance.
3, pov electrical insulation. puS butyl rubber, yuQmeyDaq 45 ~ 65kw joH rop jen.
4, QaQ yay' bIr je. rebound rate Da'elDI' 50 vatlhvI' ~ 60 vatlhvI', qaSpu'DI' je br, elasticity DeSDu' 'eS Hat pa'Dop DISHom QaQ yIqaw-57 let boghaj'a' 'eb, So'meH brittle-77 ℃ NR.
disadvantages: slower rate () 3 4 poH poH slower puS motlh vor. latlh unsaturated rubber 'ej QatlhwI'; yIqaw vIvup SoHDaq adhesive 'ej mutual Hum 'ej adhesive QatlhwI', qab processing.
'ach ngeD, qutlh, rewbe'mey'e' lo' neH hose, tape, accessories automotive, such as cables wires je.
