人工气候老化后状态调节时间对芳纶纤维拉伸测试的影响

依据GJB 8496—2015标准中的拉伸方法,对人工气候老化前及老化后不进行状态调节、状态调节1 h、状态调节24 h、状态调节48 h、状态调节96 h后的芳纶纤维的拉伸强度进行测量、比较,从而得到结论:芳纶纤维在人工气候老化后,样品的性能有一定程度下降。在刚刚结束老化后立即进行测试,性能下降达到峰值,待状态调节24 h以后,其老化后性能逐步达到一个相对稳定的状态。建议在实际测试中,人工气候老化后的样品应该在老化结束后,放入恒温恒湿间调节24 h以后再测试。

Effect of Conditioning Time on Aramid Fiber Stretch Test After Artificial Climate Aging

According to GJB 8496-2015 standard of measurement for different types of artificial climate aging of aramid fiber tensile strength,determination without artificial climate aging and determination after aging without condition,condition 1,24,48,and 96 h,then comparing the tensile strength,the conclusion was obtained.After the fiber in artificial climate aging,the properties of the samples certain decline.When it is determined immediately after aging test,there is an obvious peak decline,undergo 24 h conditioning,the properties of the fiber gradually could reach a relatively stable state.It is suggested that in the actual test,the samples after aging in artificial climate should be put in the constant temperature and humidity room for adjustment for 24 h before testing.