采用热失重方法评估PBT材料湿热老化过程中的变化。 PBT材料失重2％时对应的温度,可以反映材料性能的变化。当失重2％温度降低超过10℃时,PBT材料的力学物性也会发生重大变化,下降超过一半。
The change of polybutylene terephthalate( PBT) material in the process of wet and heat aging was e-valuated by the method of thermal weightlessness. The temperature of 2% weightlessness can reflect the change of material performance. When the temperature of 2% weightlessness reduced more than 10℃,the mechanical proper-ties of PBT material would reduce more than half.
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