中文摘要：

将生物可降解高分子材料聚丁二酸丁二醇一共一对苯二甲酸丁二醇酯（PBST）纤维在不同温度、牵伸倍数和热定型时间下热处理后，分别用差示扫描量热仪（DSC）、热台偏光显微镜（POM）、强力仪等测试其聚集态结构和力学性能的变化．研究结果表明，在热处理条件下，PBST纤维的聚集态结构和力学性能随着牵伸倍数、热处理温度和热处理时间的变化而变化，纤维聚集态结构的变化是纤维力学性能变化的内在原因．

英文摘要：

Biodegradable poly（butylene succiante-co-terephthalate） （PBST） fibers were heat-setting under different temperatures, different drawing ratios and different heat-setting time. The development of aggregation structure and mechanical properties of PBST fibers before and after heat-setting were investigated by tensile test, differential scanning calorimeter （DSC） and polarizing optical microscopy （POM） measurement. Research results indicate that the aggregation structure and mechanical properties of PBST fibers changes with the drawing ratio, the heat-setting temperatures and time, and corresponding changes of aggregation structure agree with the development of mechanical properties.