Collect. Czech. Chem. Commun. 2000, 65, 361-370

Poly(amide-imide)s Containing Polybutadiene Blocks

Miroslav Marek, Jr.a, Drahomíra Hlavatáa,*, Jana Kovářováa, Miloslav Sufčákb and Jindřich Pytelab

a Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, 162 06 Prague 6, Czech Republic
b Kaučuk, a.s., 278 52 Kralupy nad Vltavou, Czech Republic


Poly(amide-imide)s containing polybutadiene blocks were prepared by reaction of 4,4'-methylenedi(phenyl isocyanate) with trimellitic anhydride and α,ω-diisocyanatopolybutadiene. The polymers were characterized by spectroscopic methods and X-ray diffraction. Incorporation of 5 wt.% of polybutadiene structures into polyimide decreases the temperature of 10% weight loss in nitrogen by 90 °C. Glass transition temperature of the polymer also decreases with the increasing content of soft polybutadiene segments, but the decrease is moderate for the contents higher than 20 wt.%. Broad amorphous halo dominates wide-angle X-ray diffractograms of all the samples, but sharper peaks of a more ordered structure were observed in definite concentration range of polybutadiene blocks. The copolymers are soluble in N-methylpyrrolidone.

Keywords: Copolymers; Polyimides; Poly(amide-imide)s polybutadiene blocks; Thermal stability; X-Ray diffraction; Synthesis.

References: 26 live references.