Induction period, embrittlement time, molecular weight and tensile strength of photo biodegradable PE film which contain various photo sensitizer systems are studied.

• 研究了含有不同光降解剂体系的光-生物降解聚乙烯（PE）膜在氙灯辐照下诱导期、脆化时间、分子量及力学性能等的变化规律。