Synthesis and characterization of novel aromatic-aliphatic poly(amide-imide-imide)s (PAII)

Autor: Seung Jae Choi, Dong Hack Suh, Jae Kyun Jeong, Kyung Beom Seo, Young-Taik Hong
Rok vydání: 1999
Předmět:
Zdroj: Die Angewandte Makromolekulare Chemie. 264:30-38
ISSN: 1522-9505
0003-3146
DOI: 10.1002/(sici)1522-9505(19990201)264:1<30::aid-apmc30>3.0.co;2-8
Popis: Novel poly(amide-imide-imide)s (PAII) were prepared by polycondensation of a new monomer synthesized from trimellitic anhydride and glutamic acid, followed by reflux condensing with thionyl chloride and several diamines. Polymers and monomers were characterized by 'H NMR and FT-IR spectroscopy, elemental analysis and mass spectrometry. Inherent viscosities of the resulting polymers were in the range of 17-26 mL g -1 (M w 13400-29160, polydispersity (M w /M n ) ca. 1.3-1.7), representing rather low molecular weights. The glass transition temperatures of the polymers were in the range of 210-285°C depending on the structure of diamines, and the thermal stability of the polymers was up to 400°C, comparable with that of polyimides and poly(amide imide)s. All the polymers synthesized are well soluble in aprotic polar solvents such as dimethylformamide, dimethyl sulfoxide, N-methyl-2-pyrrolidone and dimethylacetamide. Particularly, polymers containing oxydianiline and 4,4'-diaminodiphenyl sulfone were quite soluble in m-cresol, pyridine, nitrobenzene and tetrahydrofuran.
Databáze: OpenAIRE
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