PET-PA66相容性及其复合沉析纤维的制备研究

Study on Compatibility of PET-PA66 and Preparation of Their Composite Fibrids

采用沉析法制备了聚对苯二甲酸乙二醇酯(PET)-聚酰胺66(PA66)复合沉析纤维,探讨了PA66的用量对复合沉析纤维的表面形貌、尺寸、亲水性能及PET和PA66分子间相容性的影响,并研究了PET复合纸强度性能。结果表明,PET-PA66复合沉析纤维形态呈带状,表面有少量褶皱;随着PA66含量的增加,PET-PA66复合沉析纤维的尺寸减小,比表面积从7.38 m^2/g增加到10.12 m^2/g,接触角从107°降低到88°,DSC曲线上仅出现了一个熔融峰,表明PET和PA66间有良好的相容性。同时FT-IR谱图中1724.3 cm^(-1)处C=O的伸缩振动峰向低波数移动,说明PET和PA66在溶解过程中分子间产生氢键作用,增加了PET-PA66体系的相容性;随着PA66含量的增加,PET复合纸的抗张指数和撕裂指数分别提高了12.0%和47.8%。

Poly（ ethylene terephthalate） （PET）-polyamide 66 （PA66） composite fibrids were prepared by precipitation method. The effects of PA66 content on surface morphology, sizes, hydrophilicity and compatibility of composite fibrids and between PET and PA66 were inves- tigated. What＇s more, the strength properties of PET composite paper were also investigated. The results indicated that the surface mor- phology of the PET-PA66 composite fibrids was ribbonlike, with some wrinkleson the surface. With the increase of PA66 content, the fiber size decreased, the specific surface area of composite fibrid increased from 7. 38 m^2/g tol0. 12 m^2/g, and the contact angle of composite fibrids decreased from 107 ° to 88°. There was only one melting peak on the DSC curve which indicated that between PET and PA66 had good compatibility, and the stretching vibration peak at 1724.3 cm^-1 in the FT-IR spectrum moved toward the low wave number direction, it indicated that the hydrogen bond between the two polymers was produced during the dissolution process, and the compatibility of the PET-PA66 system increased. With the increase of PA66 content, tensile index and tear index of PET composite paper increased 12.0% and 47.8 %, respectively.