Abstract: A series of blended films with lignin as a filler blended with low-density polyethylene (LDPE) and ethylene vinyl acetate copolymer (EVA) respectively were prepared by extruding，pellet fabrication，and melt blow molding. The influence of lignin blending on morphology，mechanical properties，thermal analysis，differential scanning calorimetry and FT-IR were investigated for both polymer blends types. Thermal analysis showed that EVA/lignin composite was more thermally stable than LDPE/lignin composite. FTIR（fourier transform infrared）indicated the existence of intermolecular interaction between lignin and EVA. According to SEM（scanning electron microscopy）analysis very effective lignin dispersion and compatibility was achieved within EVA，which was better than within LDPE. When the content of lignin was less than about 30 wt%，the mechanical properties of LDPE/lignin and EVA/lignin were acceptable.

摘要： 以木质素为填充剂分别与低密度聚乙烯（LDPE）、乙烯-乙酸乙烯酯共聚物（EVA）共混，经双螺杆造粒机共混挤出造粒，再经吹塑成膜。研究了木质素/LDPE、木质素/EVA共混物薄膜的表面形貌、力学性能、热性能和红外光谱。热分析表明木质素与EVA共混物的热稳定性比木质素与LDPE的共混物热稳定性好；红外光谱分析表明木质素与EVA分子间产生了强烈的相互作用，扫描电镜分析表明木质素与EVA共混的相容性较好，力学性能分析表明低于30%的木质素与LDPE、EVA共混力学性能较好。