拉伸速度对PET/PC原位复合纤维形态和力学性能的影响  

Influence of Drawing Speed on Morphology and Mechanical Properties of PET/PC in-situ Composite Fibers

作　　者：苏旺飞[1] 任曙霞[1] 黄象安[1] 

机构地区：[1]东华大学纤维材料改性国家重点实验室东华大学材料学院,上海201620

出　　处：《合成纤维》2010年第1期24-26,53,共4页Synthetic Fiber in China

摘　　要：采用"熔融挤出-热拉伸-淬冷"法制取了聚对苯二甲酸乙二酯(PET)/聚碳酸酯(PC)原位复合纤维。分别采用SEM、DSC表征了共混体系的形态结构和玻璃化转变温度,研究了拉伸速度对PET成纤性和原位复合纤维断裂强度的影响。结果表明:PET和PC是热力学不相容的,但这种不相容性却有利于微纤的形成;拉伸速度的提高,使得PET组分的玻璃化转变温度略有提高;随着拉伸速度的增加,PET微纤的平均直径逐渐减小,尺寸分散性变小;随着拉伸速度的增加,原位复合纤维的断裂强度逐渐增大。PET/PC in-situ composite fibers were produced through ＂extrusion-hot stretching-quenching＂. SEM results showed that PET and PC were immiscible. But this property was beneficial to form PET microfibers. Ts of PET increased slightly with increasing of drawing speed. The influence of drawing speed on the number of PET microfibers and breaking strength of the composite fibers was studied. It also found that the average diameter of PET microfibers decreased with the increasing of drawing speed, and the diameter distribution of microfibers became narrow, the breaking strength of PET/PC in situ composite fibers was improved.

关 键 词：聚对苯二甲酸乙二酯 聚碳酸酯 原位复合纤维 拉伸速度 玻璃化转变温度 力学性能 

分 类 号：TQ340.7[化学工程—化纤工业]