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用力学、动态力学、密度梯度、双折射、声速、热分析等方法，测试分析了纺速为３２００ｍ／ｍｉｎ的两种纤度的ＰＥＴＰＯＹ（涤纶高速纺丝）的结构参数和性能。结果发现，不同纤度的ＰＥＴＰＯＹ的力学性能、动态力学性能、结构参数和热性能并不一致，其中声速取向因子、双折射、［Ｅ］＿（ｍａｘ）、Ｅ＿（ｍｉｎ）、Ｔｇα（ｍａｘ）、Ｅ″１（ｍａｘ）、Ｅ″２（ｍａｘ）等值差异较大，文中列出了各种参数的变化范围。
The mechanical properties, dynamic mechanical properties, density gradient, birefringence, sonic velocity and thermal analysis were used to analyze and analyze the structural parameters and properties of PETPOY with two finenesses of 3200m / min. The results show that the mechanical properties, dynamic mechanical properties, structural parameters and thermal properties of PETPOY with different denier are not consistent. Among them, the acoustic orientation factors, birefringence, [E] max, E min, Tgα max, “1 (max), E” 2 (max) equivalent large differences, the article lists the various parameters of the range.