典型文献
New Kinetics Equation for Stress Relaxation of Semi-crystalline Polymers below Glass Transition Temperature
文献摘要：
The stress relaxation of semi-crystalline nylon 1010 cannot be fitted by the Kohlrausch-Williams-Watts formula when the experiments were performed at pre-yielding regime below the glass transition temperature.We study this problem and identify the two-step mechanism of stress relaxation.At short time scale,relaxation is fast,dominated by stress biased thermal fluctuation with a fixed short-range length scale(activation volume).At long time scale,relaxation is slow due to the emergence of a cooperative long-range length scale determined by the stress fluctuation.The cooperative length scale is proportional to the reciprocal of stress and the amplitude of stress fluctuation is the product of stress and activation volume.Based on this two-step mechanism,we propose a new kinetics equation to capture the stress relaxation effectively,where the short time relaxation is described by an Eyring-like local activation and the long-time relaxation is captured by a cooperative excitation process resorting to an extension from the random first order transition theory.Our equation fits the experimental data well and can serve as a model to guide the related experiments of relaxation processes in crystalline solids.
文献关键词：
中图分类号：
作者姓名：
Cheng Zhang;Li-Hai Cai;Bao-Hua Guo;Bing Miao;Jun Xu
作者机构：
Advanced Materials Laboratory of Ministry of Education,Department of Chemical Engineering,Tsinghua University,Beijing 100084,China;Tsinghua Innovation Center in Dongguan,Dongguan 523808,China;Center of Materials Science and Optoelectronics Engineering,College of Materials Science and Opto-Electronic Technology,University of Chinese Academy of Sciences,Beijing 100049,China
文献出处：
引用格式：
[1]Cheng Zhang;Li-Hai Cai;Bao-Hua Guo;Bing Miao;Jun Xu-.New Kinetics Equation for Stress Relaxation of Semi-crystalline Polymers below Glass Transition Temperature)[J].高分子科学（英文版）,2022(12):1662-1669
A类：
Kohlrausch
B类：
New,Kinetics,Equation,Stress,Relaxation,Semi,crystalline,Polymers,below,Glass,Transition,Temperature,stress,relaxation,semi,nylon,cannot,fitted,by,Williams,Watts,formula,when,experiments,were,performed,pre,yielding,regime,glass,transition,temperature,We,study,this,problem,identify,two,step,mechanism,At,short,scale,fast,dominated,biased,thermal,fluctuation,fixed,range,length,activation,volume,long,slow,due,emergence,cooperative,determined,proportional,reciprocal,amplitude,product,Based,propose,new,kinetics,equation,effectively,where,described,Eyring,like,local,captured,excitation,resorting,extension,from,random,first,order,theory,Our,fits,experimental,data,well,serve,model,guide,related,processes,solids
AB值：
0.557352
相似文献
机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
