So a rapid drop of molecular weight should be observed at the small dose.This is demonstrated by the result of [17] of irradiated polymethylene terephthalates.

• 特别是在辐照初期很低剂量范围内；分子量异常地下降.；辐照聚对苯二甲酸二醇酯的粘度测定支持了这一理论结果