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Novel Organosoluble Poly(amide‐imide)s Derived from Kink Diamine Bis[4‐(4‐trimellitimidophenoxy)phenyl]‐diphenylmethane. Synthesis and Characterization
Author(s) -
Liaw DerJang,
Hsu PeiNan,
Chen WenHsiang,
Liaw BeenYang
Publication year - 2001
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20010601)202:9<1483::aid-macp1483>3.0.co;2-#
Subject(s) - imide , diphenylmethane , diamine , polymer chemistry , amide , chemistry , lithium amide , polyimide , characterization (materials science) , materials science , organic chemistry , catalysis , nanotechnology , enantioselective synthesis , layer (electronics)
A new kink diimide‐dicarboxylic acid, 2,2‐bis[4‐(4‐trimellitimidophenoxy)phenyl]diphenylmethane (BTPDM), was synthesized by the condensation reaction of bis[4‐(4‐aminophenoxy)phenyl]diphenylmethane (BAPDM ) with trimellitic anhydride. A series of new poly(amide‐imide)s were prepared by direct polycondensation of BTPDM and various aromatic diamines in N ‐methyl‐2‐pyrrolidinone (NMP) using triphenyl phosphite and pyridine as condensing agents. The polymers were produced in high yield revealing moderate to high inherent viscosities of 0.80–0.89 dL·g –1 . Wide‐angle X‐ray diffractograms revealed that the polymers are amorphous. Most of the polymers exhibit good solubility and could be readily dissolved in various solvents such as NMP, N,N ‐dimethylacetamide (DMAc), N,N ‐dimethylformamide, dimethyl sulfoxide, pyridine, cyclohexanone and tetrahydrofuran. These poly(amide‐imide)s have glass transition temperatures between 244–248°C and show 10% weight loss in the range of 453–469°C under a nitrogen atmosphere. The tough polymer films, obtained by casting from DMAc solution, had tensile strengths ranging between 82 and 95 MPa and tensile moduli ranging between 1.7 and 1.9 GPa.