尼龙1010/6及尼龙1010/66动态力学分析

Dynamic Mechanical Analysis of PA1010/6 and PA1010/66

通过动态力学参数温度谱，研究了尼龙１０１０／６ 、尼龙１０１０／６６ 两个共聚物系列的动态力学参数与组成的关系。研究表明尼龙１０１０／６ 、尼龙１０１０／６６ 在测试温度范围内出现三个明显的松弛转变：α、β、γ，其中各共聚物的β、γ松弛温度相差不大，而α松弛温度随组成改变有明显改变。一般均聚物的α松弛温度较高，共聚物的α松弛温度均低于均聚物，二个系列以尼龙１０１０／６（２９ ．８／７０ ．２） 、尼龙１０１０／６６（５０ ．１／４９ ．９）α松弛温度最低。此外，对比α松弛内耗最大值，发现两个系列共聚物中分别以尼龙１０１０／６（４８．９／５１ ．１） 、尼龙１０１０／６６（５０ ．１／４９ ．９） 内耗最大；在低于α松弛温度下， 均聚物动态模量较大，但以尼龙１０１０／６（７１ ．８／２８ ．２） 、尼龙１０１０／６６（１４ ．３／８５ ．７） 动态模量最大。

The relaxations between dynamic mechanical properties and compositions of PA1010/6 and PA1010/66 are studied with DDV.It is found that PA1010/6 and PA1010/66 have three obvious relaxations between -150℃ and +250℃:α、β、γ,T β and T γ of PA1010/6 or PA1010/66 being similar ,but T α changing with the compositions increased . T α of the homopolymer is higher than that of copolymer,with PA1010/6(29.8/70.2) and PA1010/66(50.1/49.9) having lowest ,and tgδ in α relaxation of PA1010/6(48.9/51.1) and PA1010/66 (50.1/49.9) is the highest in their series,respectively。At low temperature,the value of [E] of PA100/6(71.8/28.2) and PA1010/66(7.4/92.6) is highest and that of PA1010/6(48.9/51.1) and PA1010/66(50.1/49.9)is lowest in the same series,respectively.