通过熔融共混法制备了一系列聚乳酸(PLA)/聚丁二酸丁二醇酯(PBS)物理共混试样及PLA/PBS/过氧化二异丙苯(DCP)反应共混试样,采用示差扫描量热分析(DSC)法研究了物理共混试样结晶行为及反应共混试样的特殊结晶行为.结果发现,PLA与PBS的物理共混并未改善PLA的结晶性,而PLA/PBS/DCP反应共混时生成的交联/支化结构可起到异相成核作用,从而明显改善了反应共混体系的结晶性能,且随着DCP含量的增加,共混体系中两相结晶行为出现交替变化. A series of physical blends of polylactic acid (PLA) / polybutylene succinate (PBS) and PLA / PBS / DCP reaction blends were prepared by melt blending method , The crystallization behavior and the special crystallization behavior of the blends were studied by differential scanning calorimetry (DSC) .It was found that the physical blending of PLA and PBS did not improve the crystallinity of PLA, The cross-linked / branched structure produced by PLA / PBS / DCP reaction can play the role of heterogeneous nucleation, which can obviously improve the crystallization performance of the blend. With the increase of DCP content, Two-phase crystallization behavior changes alternately.