In the low temperature these polymers usuallywill undergo a glassy transition from an ergodic state to a non-ergodic(or non-equilibrium)state.
这类材料在低温下一般会发生由各态历经态到非各态历经态的玻璃化相变。
The effects of molecular weight, molecular orientation, crack speed and elastic filler on fracture energy of glassy polymers a...
作者还介绍了脆性聚合物的分子量、分子取向、断裂速度和弹性体的填充对断裂能的影响效果；并给出了脆性聚合物及其复合材料和金属等材料的断裂能顺序排裂图。
With a focus on the silica particle-filled thermosetting polymers that are widely used in electronic packaging, an extensive study on the effect of the curing process parameters and geometrical constraint conditions on the cure-induced residual stresses and cure-induced damage has been conducted. Experimental investigation was performed on the fatigue damage and the mechanism under thermo-mechanical cycling loading. A thermo-viscoelastic constitutive model based on time-temperature and time-conversion (or glass transition temperature) correspondence principle is proposed to describe the viscoelastic behavior of the thermosetting polymers during the curing process and the thermal cycling of service conditions. A combinational approach of DMA and DSC is used to characterize the related parameters. For the first time, the concept of damage glassy modulus and damage rubbery modulus was proposed. The damage parameters based on the two damage moduli are introduced in the undamaged constitutive relation to describe the macro damage behavior and the damage model has been implemented in a general finite element code. The Gurson-Tvergaard model is applied to homogenize the materials with micro-voids and to describe the relationship between the material deformation and damage process and the micro-damage parameters.
本项目以封装用的粒子填充热固性聚合物为研究对象，研究了固化工艺参数、几何约束条件等对器件的固化残余应力及引起的微观损伤的影响，实验研究了在热－机械循环载荷下材料的疲劳失效及机理；建立了基于时间－温度、时间－固化度等效原理的粘弹性本构关系来描述材料在固化过程及使用过程中的粘弹性行为，采用DSC和DMA相结合的方法对材料参数进行了表征；首次提出损伤玻璃态模量和损伤橡胶态模量的概念，在无损伤本构模型中引入基于该损伤模量的损伤变量来描述材料在循环载荷下的宏观疲劳损伤行为；采用Gurson－Tvergaard模型对单孔洞模型进行力学均匀化，来描述材料变形及损伤过程与微观损伤参数的关系。
Escorez hydrocarbon resins are amorphous, glassy, low molecular weight hydrocarbon polymers.
Escorez石油树脂是一种无定形、玻璃状、低分子量的烃类聚合物。
Calculation of Concn Changement of Sorption Solvents in Glassy Polymers
玻璃状聚合物内吸收溶剂浓度变化问题计算