Correlation of Cooperatively Localized Rearrangement on the ＂Fluidized Domain＂ of Polymers to Their Nonexponentially Viscoelastic Behavior and Lifetime at Double Aging Processes II： Estimation of Long-term Mechanical Behavior and Lifetime of Polymeric Materials from Short-time Creep and Stress Relaxation Tests  

双重老化下高聚物流动微区的关联性局部化重排同其非指数性粘弹行为和寿命间的相关性II：从短时标蠕变和应力松弛测试来评估高聚物的长时标力学行为和寿命

作　　者：金艳[2] 宋名实[1] 胡桂贤[1] 吴大鸣[2] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029 [2]北京化工大学机电工程学院,北京100029

出　　处：《Chinese Journal of Chemical Physics》2010年第2期185-194,I0002,共11页化学物理学报（英文）

基　　金：This work was supported by the National Natural Science Foundation of China （No.50973007）.

摘　　要：Three kinds of polymeric materials are taken as example for the verification of linear ex-trapolation method from unified master lines with reduced universal equations on creep and stress relaxation tests. The theoretical values of long-term mechanical behavior and lifetime for a cured epoxide, polypropylene, poly（methyl-methacrylate）, and SBR rubber are directly evaluated with the universal equations on reduced creep compliance and reduced stress relax-ation modulus and are compared with their predicted values by the linear extrapolation from the unified master lines of creep and stress relaxation. The results show that the theoretical values of dimensional stability, bearing ability and lifetime are in an excellent agreement with the predicted values, it shows that the linear extrapolation method is more simple and reliable. The dependences of long-term mechanical behaviors and lifetime on the different aging times are discussed.

关 键 词：Physical aging Mechanical aging Dimensional stability Bearing ability Creep and stress relaxation Estimation of aging lifetime 

分 类 号：O[理学]