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A quantitative method to compare the effect of thermal aging on the mechanical performance of fire protective fabrics

机译：一种比较热老化对防火织物力学性能影响的定量方法

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摘要

A method has been proposed to provide a means to compare in a quantitative and comprehensive way the mechanical performance of fire protective fabrics under long-term thermal exposure. These high-performance materials experience a reduction in their performance overtime due to the various conditions they are exposed to during the lifetime of the clothing. The proposed method consists in a system of two equations fitting the time-temperature-performance data: the Arrhenius model combined with the time-temperature superposition principle, and the three-parameter Hill equation. The result of the data analysis using this method is provided in terms of four parameters: the temperature effect, the time rate, the degradation midpoint time, and the ultimate strength. It was used to compare the effect of accelerated thermal aging on the tear strength of seven different fabrics used in fire protective clothing. In all cases, a very good agreement was observed with both the Arrhenius model and the Hill equation. However, none of the fabrics studied appeared to stand as displaying all the characteristics that would be ideal for long-term fire protection. The best solution is thus a compromise that will depend on the type of activity conducted and the type of conditions experienced. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47045.
机译：已经提出了一种方法，以提供一种以定量和全面的方式比较防火保护织物在长期热暴露下的机械性能的方法。由于它们在衣服的寿命期间暴露于衣服的各种条件，这些高性能材料的表现加管减少了它们的表现加班。所提出的方法包括两个方程系统，该系统适合时间 - 温度 - 性能数据：Arrhenius模型与时温叠加原理相结合，以及三参数山式方程。使用该方法的数据分析结果以四个参数提供：温度效应，时间速率，降解中点时间和最终强度。它用于比较加速热老化对防火衣服七种不同织物撕裂强度的影响。在所有情况下，都有一个非常良好的协议，兼顾了Arrhenius模型和山丘方程。然而，没有研究过的织物似乎都在展示了适合长期防火保护的所有特征。因此，最佳解决方案是折衷方明，这将取决于所进行的活动类型和所经历的条件类型。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,47045。

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