화학공학소재연구정보센터
Journal of Applied Polymer Science, Vol.61, No.6, 929-933, 1996
Preparation of Polyimide Powder
A polyimide powder was prepared from 3,3’,4,4’-biphenyl tetracarboxylic dianhydride (BPDA) and 4,4’-oxydianiline (ODA). Polyimide powder having low molecular weight was prepared by imidizing low-molecular-weight polyamic acid. The molecular weight of this polyimide powder increased on heating in a solid state. The molecular weight increased with the decrease of crystallinity of polyimide.