Three Yuan second grade third rubbers (EPDM) is the ethylene, the propylene and the few non-conjugate diolefin copolymer.
三元乙丙橡胶（EPDM）是乙烯、丙烯和少量非
轭二烯
聚物。
Three Yuan second grade third rubbers (EPDM) is the ethylene, the propylene and the few non-conjugate diolefin copolymer.
三元乙丙橡胶（EPDM）是乙烯、丙烯和少量非轭二烯聚物。
The diolefins and alkenyl aromatics are very unstable components which can give gums by polymerization.In giving olefins and alky aromatics the hydrogenation improves the product quality.
二烯和烯
是非常不稳定组分，可聚合产生凝胶。对于给定烯和
，氢化可以改善产品质量。
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