利用动态力学分析、红外光谱分析以及光电子能谱(XPS)分析方法,研究了不同老化条件下极性化SBS(SBSVP)的热氧老化行为.试验结果表明,不合防老剂的SESVP在高温下会发生老化,在SBSVP的热氧老化过程中,先以交联反应为主,而后降解反应占优势,聚合物交联密度的变化导致模量和玻璃化转变温度发生相应的变化.老化后,SESVP中C=C键的含量逐渐降低,生成C=O键.随着SESVP老化温度的升高和老化时间的延长,聚合物表面氧元素的相对含量会发生相应的变化.对于SBSVP的热氧老化来说,温度的影响要大于时间的影响.
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