The phenomena of bulk melting and pellet melting of the polymer in the extrusion process is described with the aid of the submacro-and macro-scopic visual technique.

• 借助宏观和亚宏观可视化技术,描述了所观测到的聚合物挤出过程中的团块熔融和粒子熔融现象,由此提出了粒子熔融物理模型,这对聚合物材料加工理论的发展有重要意义。