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材料工程  2011 

氢化丁腈橡胶的结构与性能研究

Keywords: 氢化丁腈橡胶,分子结构,低温性能,高温性能,物理性能

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Abstract:

使用红外光谱(IR)、差示扫描量热法(DSC),热失重(TGA)等方法研究氢化丁腈橡胶(HNBR)分子结构与其低温、高温下物理性能之间的关系。研究结果显示,HNBR橡胶在720~730cm-1处具有明显的(CH2)n(n>4)红外特征吸收峰,由此可以鉴别HNBR与丁腈橡胶(NBR);随丙烯腈含量及氢化度的增大,HNBR的初始热分解温度升高;分子结构中丙烯腈含量越大,玻璃化转变温度越高,其硫化胶的拉伸强度和恒定压缩永久变形越大,这与HNBR分子中交替结构单元增多引起的结晶有关。

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