中文摘要：

以废弃无纺布为研究对象制得再生聚对苯二甲酸乙二醇酯（PET）纤维，通过热压成型技术制备PET／线性低密度聚乙烯（LLDPE）复合膜，研究了不同PET纤维含量对PET／LLDPE复合材料结构及性能的影响。结果表明：PET纤维在LLDPE基体中均匀分散，纤维与基体相界面结合力较强；PET纤维的异相成核作用促进了LLDPE的结晶，使结晶度增加；纤维的加入显著改善了PET／LLDPE复合膜的力学性能，当PET纤维质量分数为0．1％时，PET／LLDPE复合膜的拉伸强度提高了38．60％，断裂韧性提高到原来的1．5倍。

英文摘要：

The recycled polyethylene terephthalate （PET） fiber was made from wasted non-woven fabrics, and was used to prepare PET/LLDPE composites by a hot pressing molding technique. The effects of different fiber content on the structure and properties of the composites were studied. The results show that the PET fiber is well dispersed in LLDPE matrix and the interracial adhesion between them is strong. Crystallinzation of LLDPE molecular chain can be promoted owing to heterogeneous nucleation effect of PET fiber, leading to an increased crystallinity. The mechanical properties of PET/LLDPE composites are improved significantly. When the mass fraction of PET fiber is only 3.1%, the tensile strength of the PET/LLDPE composites is increased by 38. 60% and the toughness is enhanced about 1.5 times as compared to pure samples.