摘要
采用前文高聚物长时标力学行为的研究［１～３．７］所推导出的高聚物蠕变柔量（Ｄ）与推迟时间系数（β）、特征时间（ｔ０）之间的定量关系式和ｔ０与应力（σ）的关系式，分析了ＰＶＣ在不同拉伸和剪切应力水平下的蠕变数据，得到了β和ｔ０值，并验证了ｔ０与σ成线性关系，提出了从不同拉伸和剪切应力水平下短时标蠕变测试来预测高聚物长时标尺寸稳定性和使用寿命方法，具有重要学术意义和使用价值．
In the paper a universal creep function derived in previous paper (l￣3'7) was usedtO study on the dependence of shear stress level on the long term mechanical behaviors ofpolyvinyl chloride (PVC). This function is successful in relating the compliance (D), the aging time (ta ), the ratio of relaxation times in free and creep state (τi/τia ), the coefficient of retaration time (β) and the creep time (t). It was used to analysis the experimental creep data for PVC, β and t, are obtained. Results show that the relation of t,to β has linear form.Based on these relations a method for predicting the dimensional stability and life time ofPVC from the measurement of creep with different shear stress level was proposed. It has agreat scientic and applied significance.
出处
《北京化工大学学报（自然科学版）》
CAS
CSCD
北大核心
1995年第3期26-32,共7页
Journal of Beijing University of Chemical Technology(Natural Science Edition)
基金
国家自然科学基金
关键词
长时标力学行为
使用寿命
聚氯乙烯
高聚物
tensile creep
long-term mechanical behavior
life time
dimensional stability
