The Effect of Thermal Treatment Process on Crystallization of Thermoplastic Polyimides

摘要

In this study, rheological properties under dynamic shear deformations and the heat of fusion under various melting condition of thermoplastic polyimides (PI) were investigated. Storage modulus of a molten PI was found to increase with time due to the thermally activated cross-linking reaction. The relation between cross-linking and crystallization have been measured the heat of fusion after keeping in molten state at various times and temperatures. It was found that the PI (sample-A) shows excellent crystallinity in crucial melt condition than the PI (sample-B).