摘要
用对称透射法，收集在室温下不同拉伸比的非晶聚酯（PET）纤维之二维广角X射线散射（WAXS）强度函数I（k，α），采用自编MPS96型全谱分峰程序，将不同方位角α测得的WAXS强度曲线上的4个非品重叠峰进行分解，获得分子链间原子散射引起的2个峰为：K_A＝0.141nm^-1、K_B＝0．172nm^-1：分子链内原子散射引起的2个峰为：K_C＝0.311nm^-1、K_D＝0．555nm^-1。详细分析了它们的结构起源，重点探讨了分子链内原子散射引起的C峰峰强度与拉伸比Dr的关系，获得实验的统计链段取向分布具有较好的规律性．
The two dimensional scattering intensity of oriented non-opstalline polyethylene tetrephthalate (PET) fibres for a draw ratio (Dr) of 1.5 ~4.3 at ambient temperature is determined by symmetrical transmission method; Besides, self-compiled WAXS multi-peak separation program MPS96 is used as well to separate the overiapped peaks at WAXS coherent scattering intensity curves obtained at dast azimuthal angles, there of resulting to the two peaks caused by intermoloecular atomic diffraction , K_A=0.141 nm^-1 and K_B= 0.172 nm^-1, and the other two by intra -moledar atomic diffraction such as: Kc= 0.311 nm^-1, K_D= 0.555 nm^-1 of which the origin of smicture and the C peaks intensity as a function of the Dr and azimuthal angles a are dereiledly analysed, thus obtaining a X-ray detendnation method of orientation segments distribution in non -crystalline polymers.
基金
广东省自然科学基金
关键词
涤纶
非晶PET纤维
PET纤维
链段取向分布
Symmetrical transndsion
Wide angle X-ray
Scattering
Non-crystalline
PET
Mesomorphic phase
Orientation distribution of segments
