Synthesis and the properties of novel cycloaliphatic-aromatic polyamides having pendent N,N'-diphenyl imido groups |
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Authors: | Sang Hyun Park Jae Wook Lee Dong Hack Suh |
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Affiliation: | (1) Department of Chemical Engineering, Sogang University, Seoul, Korea, KR;(2) Department of Industrial Chemistry, Hanyang University, Seong dong-Gu, Seoul 133-791, Korea, KR |
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Abstract: | : We have investigated a novel monomer having two pendent phenyl imido groups for preparing new cycloaliphatic-aromatic polyamides.
Novel polyamides were synthesized by direct polycondensation reaction of N,N'-diphenyl-2,3,5,6-diimido cyclohexane-1,4-dicarboxylic acid(PICA) and various aromatic diamines such as p-phenylene diamine, 4,4'-oxydianiline and 4,4'-methylene dianiline. A direct polycondensation was carried out by a Yamazaki
method which is typical of using triphenyl phosphite, lithium chloride, and pyridine. Inherent viscosity of these resulting
polyamides are ranged 0.20 ∼ 0.45 dl/g. A transparent flexible and tough film was casted. The glass transition temperature
of the polyamide from the PICA and 4,4'-oxydianiline is 147 °C. The decomposition temperature of these polyamides are ranged
from 350 ∼ 360 °C and the ash contents of them orders MDA > p-PDA > ODA according to kinds of the using diamines. And the
solubilities of these polyamides are good in aprotic solvents such as DMAc, NMP, DMF.
Received: 26 July 1999/Revised version: 14 September 1999/Accepted: 28 September 1999 |
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