摘要
高分子材料长期使用性能及超短时间性能的预测和评价是当前高分子材料科学及工程中极其重大的研究课题之一。以往一直用半经验的W.L.F方程来处理这一问题的。但是从Doolittle方程和Arrhenius方程来考察时,发现该方程的局限性及其所带来的计算误差。本文从应力松弛模量(或动态模量)方程和温度-形变曲线方程首次推导出新的时-温等效方程,并提出了实验数据的模拟处理步骤及松弛活化能谱的新概念和表示方法。
It is one of the most important problems in the modern high polymer science and engineering to predict and estimate the mechanical properties of high polymers in a long term and/or in a very short interval. On the basis of Doolittle and Arrhenius equation, it was showed that the WLF Equation had certain limitation to describe material's behavior, even though it had been used for a long time. For the first time a new timetemperature equivalency equation was derived by applying 'stress relaxation modulus equation' and temperature-strain curve equation, and a new concept about relaxation activation energy spectrum and its expression and a programm for representing the experimental data were also proposed.
基金
国家教委高分子材料重点学科博士点基金
关键词
高聚物
材料力学性能
松驰谱
polymers, mechanical properties of materials, non-linear creep theory, relaxation spectrum, relaxation time's spectrum.
