PET/PC原位复合纤维的微纤形态和力学性能研究

Morphology and mechanical property of polyethylene terephthalate/polycarbonate in-situ blending fiber

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,研究了PET的质量含量(C_m)对PET成纤性和原位复合纤维拉伸性能的影响。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;随着C_m的增加,PET微纤的数量增多,当C_m=30%时,PET微纤数量呈现最大值,微纤直径分布最窄,而后随着C_m的增加,微纤数量减少,微纤直径分布变宽。力学性能测试结果表明,原位复合纤维的断裂强度以C_m=30%为界,先增大而后减小。

PET/PC in-situ blending fibers were produced in ＂extrusion-hot stretching-quenching＂ way. The result showed that PET and PC were immiscible. But this property was beneficial to form PET microfibers. The influence of PET mass content （ Cm ） on the number of PET microfibers and breaking strength of the blending fibers was studied at a fixed take-up speeding. It was found that the distribution of microfibers was homogeneous and the number of microfibers presented the maximum at Cm = 30%. Breaking strength of the blending fiber also presented the maximum at Cm =30%.