Preparation of polyimide powder

✍ Scribed by Hiroshi Inoue; Tadao Muramatu; Yoshikazu Sasaki; Toshio Ogawa

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 397 KB
• Volume: 61
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19960808)61:6<929::aid-app6>3.0.co;2-j

✦ Synopsis

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.