中文摘要：

按照ASTM标准方法以聚乙烯为唯一碳源培养螟蛾幼虫肠道微生物，扫面电镜（SEM）观察发现本实验菌种（T3菌）从表层开始侵蚀聚乙烯，而同一侵蚀区域其侵蚀程度也有差异，存在有明显的分层现象，故本菌种对聚乙烯的侵蚀为表面侵蚀。按照ASTM标准方法对实验后样品进行的拉伸性能测试表明，经T3菌处理的聚乙烯薄膜，随着培养时间的增加，拉伸强度与断裂伸长率均无明显规律，总体上拉伸强度与断裂伸长率均比原样要大，与理论推测的结果不符。

英文摘要：

The intestinal microflora of Plodia interpunctella （Hubner） larva are cultivated for 28 days with the culture medium of Polyethylene （PE） films as sole carbon source according to ASTM standard practice. Scanning electron microscopy（SEM） observation suggests that the PE films are eroded from the surface, and even in same region, significant difference of the erosion degree and obvious stratification occurs. Thus, the microbes erode the PE films from the surface. Tensile properties of the PE films processed with the microorganism were tested according to ASTM standard test method, and tensile strength and percent elongation at break seems irregular as the culture time increasing. They are both larger than the original ones, and inconsistent with the theoretical speculation.