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本文在前文实验结果的基础上采用热台X射线衍射法、流变测定法,进一步说明DSC测得的相转变峰机理和偏光显微镜下的结构转变机理.结果表明,热X射线衍射法测得强度及峰位的变化规律能很好地说明DSC曲线在260℃时的转变峰确为体系的熔融峰;同样,粘弹参数随温度的变化规律又能很好地说明和解释偏光显微镜下的(?)区分离现象;小角X射线衍射结果表明,其相态在260～320℃为向列型液晶,说明共聚酯体系在液晶温度区不存在近晶型相.
Based on the previous experimental results, the hot-stage X-ray diffraction and rheological measurement were used to further illustrate the mechanism of phase transition peaks and the mechanism of structural transformation under polarized light microscopy.The results show that the thermal X-ray diffraction The variation of intensity and peak position can well explain that the transition peak of DSC curve at 260 ℃ is the melting peak of the system. Similarly, the variation law of viscoelastic parameters with temperature can well explain and explain (?). The small-angle X-ray diffraction results show that the phase state of the nematic liquid crystal is nematic liquid crystal at 260-320 ℃, indicating that there is no smectic phase in the liquid crystal temperature region of the copolyester system.