EPDM caag (etylene propylene diene monomer rubber) waa nooc ka mid ah caag synthetic ah oo loo isticmaalo codsiyo badan.Dienes-ka loo isticmaalo samaynta caagagga EPDM waa ethylidene norbornene (ENB), dicyclopentadiene (DCPD), iyo vinyl norbornene (VNB).4-8% monomer-yadan ayaa sida caadiga ah loo isticmaalaa.EPDM waa caag M-Class hoos yimaada ASTM heerka D-1418;fasalka M wuxuu ka kooban yahay elastomers leh silsilad buuxa oo ah nooca polyetylenka (M oo ka soo jeeda ereyga saxda ah ee polymethylene).EPDM waxay ka samaysan tahay ethylene, propylene, iyo diene comonomer taasoo awood u siinaysa isku xidhka iyada oo loo marayo vulcanization sulfur.Qaraabada hore ee EPDM waa EPR, caag ethylene propylene ( faa'iido u leh fiilooyinka korantada ee sarreeya), kaas oo aan ka soo bixin wax horudhac ah oo diene ah oo kaliya ayaa la isku xiri karaa iyadoo la adeegsanayo hababka xagjirka ah sida peroxides.
Sida caagadaha intooda badan, EPDM waxaa had iyo jeer la isticmaalaa iyada oo lagu daray buuxinta sida kaarboon madow iyo kaarboonayt calcium, oo leh balaastiigyada sida saliidaha paraffin, waxayna leedahay sifooyin caag faa'iido leh oo keliya marka la isku xiro.Isku xirka inta badan wuxuu ku dhacaa vulcanisation leh baaruud, laakiin sidoo kale waxaa lagu dhammeeyaa peroxides (si ay u adkeyso kulaylka wanaagsan) ama resins phenolic.Shucaaca tamarta sare leh sida alwaaxyada elektarooniga ah ayaa mararka qaarkood loo isticmaalaa soo saarista xumbo iyo silig iyo fiilada.
Waqtiga boostada: Meey-15-2023