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用纵拉、先纵后横、纵-横-纵等拉伸方式得到了各种平面取向程度的PET薄膜。短路热释电流温谱显示α峰随平面取向度增大向高温线性移动。被冻结的大分子主链链段偶极热松弛活化能随反式构象含量增大呈线性下降。热松弛时间常数则随反式构象含量增大而增长。
With the longitudinal pull, the first vertical after the horizontal, vertical - horizontal - longitudinal stretching method to get a variety of plane orientation PET film. The short-circuit thermolysis current thermogram showed that the α-peak moved linearly to high temperature as the planar orientation increased. The activation energy of the frozen macromolecule backbone chain dipolar thermal relaxation linearly decreases with increasing conformational content. The thermal relaxation time constant increases with the increase of trans conformational content.