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Heterocyclic polyamides containing hexafluoroisopropylidene groups
Author(s) -
Bruma Maria,
Hamciuc Corneliu,
Hamciuc Elena,
Mercer Frank,
Belomoitaliya,
Schulz Burkhard
Publication year - 1997
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19971220148
Subject(s) - polyamide , polymer chemistry , condensation polymer , imide , materials science , glass transition , polymer , dimethylformamide , diamine , dielectric , decomposition , copolymer , organic chemistry , chemistry , composite material , solvent , optoelectronics
New heterocyclic polyamides have been synthesized by solution polycondensation of aromatic diamines containing phenylquinoxaline units with diacid chlorides having both imide and hexafluoroisopropylidene (6F) groups. These polymers are soluble in polar aprotic solvents, such as N‐methylpyrrolidone (NMP) or N, N‐dimethylformamide (DMF), and can be cast into flexible thin films from solutions. They show high thermooxidative stability with decomposition temperatures above 400°C and glass transition temperatures in the range of 225‐300°C. The polymer films exhibit good chemical resistance towards diluted acids and good electrical insulating properties with dielectric constants in the range of 3.2–3.7.