Study of Submacroscopic Melting of Polymer in Single Screw Extrusion - Physical Model of Polymer Granule Melting

Abstract

The process of polymer melting plays a vital role in stable extrusion. Due to its complexity in “a black box”---extruder, it is difficult to observe directly. Therefore, the visualization technology applied in this course emerged and has been improved continuously, which is regarded as an important means of promoting the development of extrusion theory. This article describes and analyses the phenomena of bulk melting and granule melting with the aid of the submarco-and macro-scopic visual technique in single screw extrusion. Physical model of granule initial melting in extrusion was presented.