中文摘要：

脂肪族聚碳酸酯（APC）是一类可降解的高分子材料，因其生产工艺可固定温室气体的主要成分二氧化碳，这种可降解塑料得到了越来越多的关注．作为半结晶高分子材料，脂肪族聚碳酸酯的结晶性能和结晶结构对成型加工、力学性能和降解性能具有重要的影响．借助热分析（示差扫描量热仪DSC）和形态学观察（偏光显微镜POM）两种方法研究了不同链结构的双酚A型聚碳酸酯对半结晶脂肪族聚碳酸酯——聚碳酸1，4-丁二醇酯结晶动力学行为的影响．实验发现质量分数1％的双酚A聚碳酸酯的加入促进了聚碳酸1，4．丁二醇酯的成核，但不同链结构的双酚A聚碳酸酯对其晶体生长具有相反的作用，线形双酚A聚碳酸酯（PC-L）能够促进晶体生长，而支化双酚A聚碳酸酯（PC-B）则抑制晶体生长．用原子力显微镜在轻敲模式下研究了两种双酚A聚碳酸酯与APC共混物熔融状态下的相结构，发现熔体结构的不同是导致两种共混物与纯的APC相比，结晶速率呈现相反变化趋势的主要原因．

英文摘要：

In the present investigation,the effect of the chain structure and aggregation state of bisphenol A polyearbonate （PC） on the crystallization kinetics and morphology of the poly（butylene carbonate） has been studied by DSC and POM. It was found that the addition of bisphenol A polyearbonate A promoted the nucleation of the poly（butylene carbonate） ,while the chain structure of PC had the opposite influence on the crystal growth rate of the poly （butylene carbonate）. The linear bisphenol A polyearbonate polycarbonate accelerates the crystal growth rate of poly （ butylene carbonate） , while the long chain-branched bisphenol A polycarbonate decelerates it. The phase images of the blends of aliphatic polyearbonates and bisphenol A polycarbonate were obtained under the tapping mode by atomic force microscopy （AFM）. The linear bisphenol A polycarbonate shows isolated irregular aggregation with phase size of ca. 200 nm in the poly （butylene carbonate） ,while the formation of condense and continuous network structure by long branched bisphenol A polyearbonate might explain the deceleration effect on the crystal growth rate of the poly（ butylene carbonate）.