热定型对PBST纤维性能的影响

Effects of heat-setting on the properties of poly(butylene succinate-co-butylene terephthalate) (PBST) fibers

聚丁二酸丁二醇-共-对苯二甲酸丁二醇共聚酯（PBST）纤维在松弛干热条件下进行热定型,温度范围为50~150℃,时间范围为0.2~30min。研究了热定型温度和时间对PBST纤维拉伸性能、收缩性能和卷曲性能的影响。采用70℃、0.5min的定型工艺或采用50℃、30min的定型工艺时,纤维的断裂强度达到最大值1.92cN/dtex。PBST纤维的干热收缩率随热定型温度的升高和时间的延长而增大,卷曲率的变化趋势与干热收缩率相似。

Biodegradable poly（butylene succinate-co-butylene terephthalate）（PBST） fibers were heat-set at temperatures between 50 and 150℃ for times ranging from 0.2 to 30 min in dry-heat air under slack condition. The effects of heat-setting temperature and time on the tensile, shrinkage and crimp properties of PBST fibers were investigated. The breaking strength reached its maximum value of 1.92 cN/dtex at the heat-setting temperature of 70℃ for the heat-setting time of 0.5 min or at 50℃ for 30 min. The dry-hot shrinkage of the PBST fibers showed an increasing tendency with increasing the heat-setting temperature and time. The crimp contraction indicated the similar variation trend to the dry-hot shrinkage.