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Composites a matrices polyimides thermoplastiques mecanismes de polymerisation et proprietes
Author(s) -
GrenierLoustalot MarieFlorence,
Barnaud Marie,
Biensan Michel,
Gensous Francis,
Ludi Martine,
Tremillon Jean Michel
Publication year - 1987
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19870090105
Subject(s) - phthalic anhydride , imide , polymer chemistry , fourier transform infrared spectroscopy , sulfone , ether , materials science , solvent , amine gas treating , infrared spectroscopy , polymerization , chemistry , organic chemistry , chemical engineering , composite material , polymer , catalysis , engineering
Model compounds have been used to determine the mechanisms of reaction of aromatic diamines with aromatic cyclic dianhydrides to form polyamic acids and polyimides by thermal or chemical dehydration. Substituted phthalic anhydride were used to model the anhydride functionality and either 4,4′‐diaminodiphenyl (ether, sulfone, methane) or toluidines for the amine functionality. Chemical data obtained ‘in situ’ with Fourier transform infrared spectroscopy (FTIR), 13C nuclear magnetic resonance (liquid and solid states CP MAS) and X‐rays diffractometry show that the degree of imidisation is temperature and solvent dependent. This analysis resulted in an analytical method of determining the anhydride ‐ amic acid, and/or amic ‐ imide ratios in the partly cured polyamic acid. Selected properties of films and composites were determined and compared with similar commercial compounds.