摘要
研究了应力状态下 4种丁腈橡胶硫化胶在空气和油介质中的烘箱加速老化与长达 30a之久的室内自然老化的相关性。结果表明 :根据加速老化建立的P -T -t三元数学模型外推计算自然老化下的性能变化 ,其预测值与试验值是相吻合的。同时利用σ/σ0 对logt的关系图考察了 3种试样在自然老化下长时间应力松驰行为 ,表明松驰过程是非常缓慢的。过氧化物硫化以及过氧化物与硫黄并用硫化的 2种试样 ,经 1 0 0a后其应力仅下降 30 %～ 4 0 %。
The correlation of oven accelerated aging and room temperature auto age for 30 years of 4 types of NBR in air and oil at state of stress was researched in this paper. The properties changes at auto aging were extrapolated and calculated according to P-T-t ternary meths mold set up by accelerated aging theory, The results showed that the calculated value was basically same as the test one. The stress relaxation of 3 kinds of sample at auto deterioration for long time was testted with the relation of σ/σ 0 vs log t ,it was indicated that the process was extremely slow. In the 2 kinds of samples cured with peroxide and with peroxide/sulphur combination respectively their stress rela was only 30%～40% after hundered years.
出处
《特种橡胶制品》
2001年第4期51-56,33,共7页
Special Purpose Rubber Products
