In recent years, some new model approaches have been adopted to explain the flow-induced crystallization, such as the molecular model and the phenomenological model. 近年来,人们又提出了一些全新的流动致结晶理论,比如分子模型和唯象模型。
This paper will review the essential theory and the applications of the models, compare their advantages and disadvantages, and anticipate the trend in the field of flow-induced crystallization. 本文综述了这些理论模型的理论背景,建模思想以及适用范围等,对比了各个模型的优势和不足,展望了流动致结晶理论研究领域的研究趋势和前景。
Progress in the Modeling Approach to Flow-Induced Crystallization 流动致结晶建模方法的研究进展
Since the 1960s, many experiments of flow-induced crystallization in polymer melts have been conducted and related models have been proposed. 自上个世纪60年代以来,人们对聚合物熔体的流动致结晶进行了大量实验研究并提出了相关的理论模型。
Many experimental phenomenons can be related to the flow-induced crystallization of polymeric materials, for example, the necking process of the high-speed fiber spinning process. 加工成型过程中的很多现象都与流动诱导结晶相关,如高速熔融纺丝中的颈缩现象。
Flow-induced crystallization is the core problems in polymer processing and an important project in polymer science. 流动场诱导高分子结晶是高分子材料熔体加工的核心问题,也是高分子科学的重要课题。
The Arrhenius model, differential viscoelastic model-PPT model and flow-induced crystallization model are applied to describe the spinning melt extrusion stretch forming, which makes the melt spinning model more accurate and more practical. 论文详细分析了熔体挤出成形过程,把温度依赖粘度变化的Arrhenius模型、微分粘弹性PPT模型和流动诱导结晶模型应用于描述纺丝熔体挤出拉伸成型,使得熔体纺丝模型更符合实际。
The flow-induced crystallization and its orientation in polymer processing may improve the mechanical and optical properties of products. 成型加工中由流动而诱发的高分子结晶及其取向可显著提高制品的力学和光学性能。