Abstract
Polyether-aramid multi-block copolymers having structural regularity were synthesized by a one-pot two-step method of direct polycondensation using triphenyl phosphite and pyridine as condensing agents. Amine-terminated telechelic aramid oligomers were prepared by the reaction of bis(4-aminophenyl) ether and isophthalic acid, and subsequently condensed with α,ω-poly(oxyethylene)dicarboxylic acid giving the multi-block copolymers with inherent viscosities of 0.5—0.7 dl g−1. No appreciable differences in thermal and tensile properties were observed between the multi-block copolymers thus prepared and those synthesized by the previously reported two-pot method. In contrast, the properties of these block copolymers differed significantly from those of a randomly coupled block copolymers prepared by the one-step procedure.
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Y. Imai, M. Kajiyama, S. Ogata, and M. Kakimoto, Polym. J., 16, 267 (1984).
M. Kita, H. Tanaka, and T. Shimada, Sen-i Gakkaishi, 40, T-411 (1984).
T. Inoue, S. Ogata, M. Kakimoto, and Y. Imai, Macromolecules, 17, 1417 (1984).
S. Ogata, M. Kakimoto, and Y. Imai, Macromolecules, 18, 851 (1985).
S. Ogata, H. Maeda, M. Kakimoto, and Y. Imai, Polym. J., 17, 935 (1985).
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Imai, Y., Kajiyama, M., Ogata, Si. et al. Improved Synthesis of Polyether-Aramid Multi-Block Copolymers by Direct Polycondensation. Polym J 17, 1173–1178 (1985). https://doi.org/10.1295/polymj.17.1173
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DOI: https://doi.org/10.1295/polymj.17.1173