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以端羟基液体丁腈橡胶、二苯基甲烷二异氰酸酯及扩链剂1,4-丁二醇为原料,加入自由基引发剂2,5-二甲基-2,5-双(过氧化叔丁基)己烷和交联助剂三烯丙基异三聚氰酸酯(TAIC),制备了邻接交联型聚氨酯弹性体(PUE),考察了TAIC的用量对PUE力学性能的影响,并对PUE的热性能进行了研究。结果表明,随着TAIC用量的增加,PUE的交联密度增大,分子柔顺性降低,材料的力学性能逐渐提高,耐热性增强,玻璃化转变温度升高。
Using hydroxy-terminated liquid nitrile rubber, diphenylmethane diisocyanate and chain extender 1,4-butanediol as raw materials, a free radical initiator 2,5-dimethyl-2,5-bis Butyl) hexane and cross-linking assistant triallyl isocyanurate (TAIC) were prepared. The adjacent cross-linked polyurethane elastomer (PUE) was prepared. The effect of TAIC dosage on the mechanical properties of PUE was investigated. The thermal properties of PUE were studied. The results showed that with the increase of the amount of TAIC, the crosslinking density of PUE increased, the molecular flexibility decreased, the mechanical properties of the material gradually increased, the heat resistance increased, and the glass transition temperature increased.