交联聚苯乙烯的辐照效应.PDF

CNIC-01942 CAEP-0216 交联聚苯乙烯的辐照效应 熊洁 (中国工程物理研究院核物理与化学研究所，绵阳，621900) 摘要 交联聚苯乙烯(SDB) 具有很好的耐辐射性，本研究通过红外光 谱、扫描电镜和气相色谱等测试手段，观察了 SDB 受辐射后化学结 构及微观形貌的变化，探讨了射线对其的作用机理o 实验发现:随着 吸收剂量的增大，SDB 颜色逐渐变黄且随吸收剂量增大颜色加深，单 位质量样品的增重百分比也随之增大;在空气中辐照后的 SDB 出现 C=o 和 C-o 基团;样品的表观形貌变化不大，这与其辐射稳定性 有关;测得空气气氛下辐解气体产物组分中，以 cO 含量为最高，其 z 次是 Hz ， CO 和 CH ， CzH6 含量最低o 对各种气体生成的变化规律 4 进行了分析，发现空气中的氧在辐照中参与反应形成过氧化物，并对 SDB 辐照所产生的几种过氧化物存在形式进行了推断和研究。 关键词 SDB 辐射效应 120 Radiation Effect on Polystyrene-Divinylbenze (InChinese) XIONG Jie Clnstitute of Nuclear Physics and Chemistry , CAEP , Mianyang , 621900) ABSTRACT The SDB polymer had better irradiation resistance. The property of SDB was studied by the methods of FT-IR , SEM and GC/MS. With the increasing absorbed dose , the color of SDB turned yellow slowly and the increase of weight was also found to turn to be highe r. The oxidation reaction was con- firmed by the appearance of C= Q and C-O. The SEM images of SDB had un- obvious change. From the results of the quantity of the irradiated gas in air , it was found that the CO2 had the highest content , the H z CQ , CH4 and C2 日6 took turns. The phenomenon was explained clearly and the peroxides structures were also confirmed. Key words: SDB , Radiation effect 121 引 高分子材料的抗辐照性能各有不同，有些材料的抗辐照性很好，这主要是由于抗辐照基