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Processable heat‐resistant polymers. VII. Synthesis and characterization of polyamideimide from N ‐( p ‐carboxyphenyl) trimellitimide and p , p ′‐di(aminocyclohexyl) methane
Author(s) -
Maiti Sukumar,
Ray Atanu
Publication year - 1982
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.1982.070271124
Subject(s) - polymer , condensation polymer , polymer chemistry , dielectric loss , intrinsic viscosity , dielectric , solubility , thermal stability , methane , chloride , materials science , analytical chemistry (journal) , chemistry , organic chemistry , optoelectronics
Polyamideimides were prepared either directly from N‐(p ‐carboxyphenyl)trimellitimide and p , p ′‐di(aminocyclohexy)methane (PACM‐20) by low temperature (<5°C) polycondensation in presence of thionyl chloride or by reacting the diacid chloride of N ‐( p ‐carboxyphenyl)trimellitimide and PACM‐20 at 30–70°C. The polymers were characterized by nitrogen analysis and IR spectra. The polymers are soluble in highly polar solvents such as DMF, DMAC, NMP, and m ‐cresol. The solubility parameter was calculated from the Small's group contribution, which agrees well with the experimental value. The solution viscosity of the polymer is fairly stable against ageing. The T g of the polymer calculated from the DTA curve is 270°C or even higher. Thermal analyses indicated that the polymer is fairly stable and only 5–6% weight loss occurs up to 350°C or 380°C. Dielectric constant, dielectric loss, and electrical conductivity of the polymer were also studied.