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Preparation and fabrication of aromatic polyimides
Author(s) -
DineHart R. A.,
Wright W. W.
Publication year - 1967
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1967.070110501
Subject(s) - pyromellitic dianhydride , fabrication , polymerization , materials science , degradation (telecommunications) , polyimide , polymer chemistry , chemical engineering , monomer , polymer , polymer science , organic chemistry , chemistry , composite material , computer science , medicine , telecommunications , alternative medicine , layer (electronics) , pathology , engineering
Aromatic polyimides were prepared from pyromellitic dianhydride and a number of aromatic diamines. The effect of certain variables on the polymerization to, and the degradation of, the intermediate polypyromellitamic acids was studied, and a previously unrecorded reaction intermediate was isolated and identified. From these studies the conditions necessary to obtain high molecular weights were defined. Techniques were developed for the fabrication of satisfactory films and moldings.