摘要
对氢化丁腈橡胶在不同应变水平和不同温度下的加速老化行为进行了实验研究。选取断裂伸长率为评价材料性能的指标。结果表明,加载应变越大,老化温度越高,氢化丁腈橡胶断裂伸长率随时间下降越快,说明外加应变和温度均对氢化丁腈橡胶老化具有加速效果。应变老化加速效果与应变水平之间呈近似线性关系,温度升高会增强应变老化的加速效果。
The aging behavior of nitrile-butadiene rubber under different strain levels and temperatures was studied. The result shows that the elongation-at-break decreases with the increase of strain level, i.e, strain accelerates the aging process of nitrile-butadiene rubber. The mechanism of strain accelerated aging was discussed preliminarily. The applied strain reduces the breaking activation energy of the molecular chain. Meanwhile, it produces voids inside the material, which intensify the diffusion of oxygen and accelerate the aging process eventually.
出处
《应用数学和力学》
CSCD
北大核心
2014年第S1期213-216,共4页
Applied Mathematics and Mechanics
基金
四川大学高分子材料工程国家重点实验室开放课题基金(KF201204)
关键词
氢化丁腈橡胶
应变水平
加速老化
断裂活化能
nitrile-butadiene rubber
strain level
accelerated aging
breaking activation energy
