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Synthesis and characterization of novel benzhydrol‐containing poly(amide‐imide)s
Author(s) -
Liaw DerJang,
Liaw BeenYang,
Sillion Bernard,
Mercier Régis,
Thiria Remi,
Sekiguchi Hikaru
Publication year - 1999
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/(sici)1097-0126(199906)48:6<473::aid-pi173>3.0.co;2-j
Subject(s) - condensation polymer , polyamide , imide , glass transition , triphenyl phosphite , polymer , polymer chemistry , materials science , pyridine , ultimate tensile strength , amide , polyimide , inherent viscosity , dimethylacetamide , chemistry , solvent , organic chemistry , composite material , intrinsic viscosity , layer (electronics)
A series of novel benzhydrol‐containing poly(amide‐imide)s (PAIs) have been prepared from a new diimide‐dicarboxylic acid, N , N ′‐bis(4‐hydroxycarbonyl)‐benzhydrol‐3,3′,4,4′‐tetracarboxydiimide (BHTDA‐DIA), with various diamines by direct polycondensation using triphenyl phosphite and pyridine as condensing agents. The polymers obtained had inherent viscosities of 0.35–0.96 dl g −1 . All these PAIs, except polymer PAI‐2, were soluble in N ‐methyl‐2‐pyrrolidinone and N , N ‐dimethylacetamide containing LiCl (1 wt%). Tough and flexible PAI films could be obtained by casting PAIs from their DMAc or NMP solutions, except for polymer PAI‐2. The polymer films had a tensile strength of 93–111 MPa, an elongation at break range of 4–6%, and an initial modulus range of 2.7–3.8 GPa. The glass transition temperatures of most polymers were found to be above 255 °C. These polymers were fairly stable up to a temperature around or above 400 °C, and lost 10% weight in the range 426–507 °C in nitrogen and 423–515 °C in air. © 1999 Society of Chemical Industry