Synthesis of tetraarm stars with polyetherimide-polyether block copolymer arms

• Published in: Russian chemical bulletin Vol. 71; no. 4; pp. 777 - 786
• Main Authors: Soldatova, A. E., Tsegelskaya, A. Yu, Semenova, G. K., Bezsudnov, I. V., Polinskaya, M. S., Abramov, I. G., Kuznetsov, A. A.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.04.2022; Springer Nature B.V
• Subjects: Block copolymers; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Full Article; Inorganic Chemistry; Morphology; NMR; Nuclear magnetic resonance; Organic Chemistry; Phenylenediamine; Polyetherimides; Stars; star-shaped polymers; block copolymers; polycondensation; polyethers; polyimides; heteromonomers; 4-(3-aminophenoxy)phthalic acid
• ISSN: 1066-5285; 1573-9171
• DOI: 10.1007/s11172-022-3478-2

The method of one-stage catalytic polycyclocondensation according to the B4 + AB scheme was used to synthesize new tetraarm star-shaped oligoimides (SOIs) with terminal amino groups and a variable average arm’s length. A new tetraamine obtained by condensation of m -phenylenediamine with a di-Boc derivative of 3,5-diaminobenzoic acid was used as a branching center (B4). 4-(3-Aminophenoxy)phthalic acid was used as the AB heteromonomer. The end amino groups were converted into carboxyl groups by treatment of the resulting reaction SOIs with trimellitic anhydride. The subsequent grafting of an oligoalkylene oxide oligomer with a terminal amino group onto them yielded the stars with block copolymer arms. The chemical and morphological structure of new block copolymer stars has been studied by IR and 1 H NMR spectroscopies, TGA and SEM. It was established by the SEM method that the synthesized objects have a two-phase morphology.