硫化体系
Vulcanization system
硫化剂有异氰酸酯、过氧化物和硫磺三类：异氰酸酯类硫化剂的常用品种为TDI及其二聚体、MDI二聚体和PAPI等，可生成脲基甲酸酯键交联键（易吸水，使用时注意环境湿度），可以制得耐磨性良好、强度高、硬度较大的制品；过氧化二异丙苯（DCP）是用得最普遍的过氧化物硫化剂，过氧化物硫化PUE制品具有良好的动态性能，压缩永久变形小，弹性和耐老化性能均较好，缺点是不能用蒸汽直接硫化，撕裂强度较差；含有不饱和链段的PUE可采用硫磺体系硫化，用量一般为1.5~2份，促进剂M和DM最常用，一般在6份左右，硫化制品综合性能较好。
There are three kinds of curing agents: isocyanate, peroxide and sulfur: the common varieties of isocyanate curing agents are TDI and its dimer, MDI dimer and Papi, etc., which can form urea carboxylate bond crosslinking bond (easy to absorb water, pay attention to the environmental humidity when using), and can produce products with good wear resistance, high strength and high hardness; diisopropylbenzene peroxide (DCP) is the most commonly used Pue products vulcanized by oxide and peroxide have good dynamic properties, small compression set, good elasticity and aging resistance. The disadvantage is that it can not be directly vulcanized by steam, and the tear strength is poor; pue containing unsaturated chain segment can be vulcanized with sulfur system, the dosage is generally 1.5 ~ 2 phr, accelerator m and DM are most commonly used, generally about 6 phr, vulcanized products are comprehensive Good performance.