聚乙烯薄膜光降解过程及其降解物特性的研究

Study on Photodegradation Process of PE filmand Characteristics of its Degraded Products

本文采用力学性能测定、红外光谱法、分子量测定、元素分析、电子显微镜方法研究了光降解聚乙烯薄膜在户外曝露的物理、化学变化特征。证明了户外曝露与人工模拟老化、分子量变化与力学性能及降解程度的相关关系。发现降解残膜的构成特征，及其对微生物的降解性。

Using mechanical measurement, FTIR,molecular weight determination, element analysis, and SEM, the authors investigated the physical and chemicalchanges of photodegradable PE film in outdoor exposure, and clarified the relationships between outdoor exposure and artifical weathering, and that bewteenmolecular weight variation and mechanical properties and level of degradability. And, the structural features of degraded film residues and its sensibilityto microbial degradationare also found.