聚稳丁腈橡胶的结构与性能研究. (Chinese)

Structure and Properties of Polymerization Stabilized Nitrile Rubber. (English)

The microstructure of raw rubber and the properties of the compound of polymerization stabilized nitrile rubber DN3305 (referred to as DN3305) were studied and compared with ordinary nitrile rubber 3305E (referred to as 3305E). The results showed that, the molecular structure of DN3305 was not much different from that of 3305E, the molecular weight and its distribution were close to 3305E, and the glass transition temperature of DN3305 was higher than that of 3305E. The Mooney viscosity of DN3305 compound was lower than that of 3305E compound, the vulcanization characteristics were similar, and the processability was better. The tensile stress at 300% elongation and tensile strength of the DN3305 vulcanizate were higher than those of the 3305E vulcanizate. After hot air aging at 110℃ for 28 days, the DN3305 vulcanizate still had some elasticity, showing better hot air aging resistance, and its oil resistance was also better. For the nitrile rubber products which did not require good low-temperature performance, polymerization stabilized nitrile rubber could be used to replace ordinary nitrile rubber to achieve excellent high-temperature resistance. [ABSTRACT FROM AUTHOR]

研究聚稳丁腈橡胶 DN3305（简称DN3305）生胶的微观结构以及胶料的性能, 并与普通丁腈橡胶3305E (简称 3305E) 进行对比。结果表明：DN3305 的分子结构与3305E差异不大, 相对分子质量及其分布与 3305E 接近, 玻璃化温度高 于3305E; DN3305 混炼胶的门尼粘度低于3305E 混炼胶, 硫化特性相近, 加工性能较好; DN3305 硫化胶的 300% 定伸应力 和拉伸强度高于 3305E 硫化胶, 在 110 ℃×28 d 热空气老化后 DN3305 硫化胶仍有一定的弹性, 具有较好的耐热空气老化性 能, 耐油性能也较好。对于非耐低温的丁腈橡胶制品, 可用聚稳丁腈橡胶替代普通丁腈橡胶以获得优异的耐高温性能。 [ABSTRACT FROM AUTHOR]

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