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Compared properties of aromatic polyisophthalamides containing 5‐(4‐acetoxy‐benzamido) pendent groups
Author(s) -
Sava Ion,
Bruma Maria,
Hamciuc Corneliu,
Hamciuc Elena,
Ţîmpu Daniel,
Mercer Frank
Publication year - 2001
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 - 10.1002/1097-4628(20010425)80:4<650::aid-app1141>3.0.co;2-o
Subject(s) - polyamide , polymer chemistry , dimethylacetamide , thermal stability , polymer , glass transition , solubility , materials science , thermal decomposition , dielectric , chemical engineering , chemistry , organic chemistry , composite material , solvent , optoelectronics , engineering
A series of aromatic polyamides containing 5‐(4‐acetoxy‐benzamido) pendent groups have been synthesized and their properties have been characterized and compared with those of related polyamides. The polyamides have weight‐ and number‐average molecular weights in the range of 36,680–65,700 and 12,685–35,490, respectively, and polydispersities in the range of 1.82–3.66. These polymers show good thermal stability comparable to traditional aromatic polyisophthalamides, with initial decomposition temperature between 270–320°C and glass transition temperature in the range of 230–270°C. Compared with related polyisophthalamides without any pendent groups, the present polymers show better solubility in certain solvents such as N ‐methylpyrrolidinone and dimethylacetamide and can be cast from solutions into thin transparent flexible films having dielectric constants in the range of 3.42–4.27. The polymer films display remarkable hydrophilicity, which makes them potential candidates for use as advanced materials in humidity sensors. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 650–657, 2001