哑铃式聚合物分子模型流变性质的Brown动力学模拟  

BROWNIAN DYNAMICS SIMULATION OF FENE DUMBBELL MODELS WITH CONFIGURATION DEPENDENT FRICTION COEFFICIENTS

作　　者：方建农[1] 范西俊[1] 

机构地区：[1]浙江大学力学系

出　　处：《力学学报》1997年第3期349-354,共6页Chinese Journal of Theoretical and Applied Mechanics

基　　金：国家自然科学基金

摘　　要：采用非平衡态Ｂｒｏｗｎ动力学方法（ＮＥＢＤ）模拟ＦＥＮＥ哑铃分子模型在定常拉伸流动和突然开始拉伸流动中的运动，计算流变性质，考虑位形相关Ｓｔｏｋｅｓ阻力系数等模型参数的影响，并从非线性随机动力学角度，分析相图。Results of nonequilibrium Brownian dynamics simulations of the steady state and transient rheological behavior of nonlinear elastic dumbbell models in elongational flow is reported. The simulations include exa min ation of the effects of configuration dependent friction coefficients and spring parameter. The nonlinear random dynamical theory is used to analyze phase diagrams and an interpretation of no S shaped curves for the elongational viscosity or for the mean square end to end distance is given.

关 键 词：动力学模拟 分子模型 流变学 聚合物 NEBD 

分 类 号：O631.21[理学—高分子化学] O7[理学—化学]