玻璃态聚合物焓松弛动力学研究进展

Progress in Study of Enthalpy Relaxation of Glassy Polymers

玻璃态聚合物焓松弛及其模型构建是聚合物松弛研究的重要内容,对于聚合物材料的物理老化及长期使用性能有指导意义,并与对材料玻璃化转变本质的认识密切相关。一个完整的松弛动力学模型至少涉及三方面内容:聚合物平衡态性质、松弛过程描述以及松弛时间-温度-结构模型,目前这三方面都未有最终结论,本综述对上述三方面的基本模型进行介绍,对其最新研究进展进行综述,并对焓松弛动力学研究进行展望。

Enthalpy relaxation and the corresponding model construction are key problems in the issues of relaxation of polymer.It is vital for the physical aging and long-term use of polymer and associates closely with the understanding of the nature of glass transition.Three basic issues are involved in the kinetic model of relaxation:equilibrium property of polymer,relaxation process description and relaxation time-temperature-structure model.No final conclusion has been reached for each of the three topics.This review introduces the classical models and the development of the three aspects.