Abstract
Polysiloxane-aramid block copolymers were synthesized by a one-pot two-step method of direct polycondensation using triphenyl phosphite and pyridine as the condensing agent. Carboxyl-terminated aramid oligomers were prepared by the reaction of 3,4′-oxydianiline and isophthalic acid, and then condensed with bis(3-aminopropyl) olydimethylsiloxane giving the block copolymers with inherent viscosities of 0.21—0.41 d1 g−1. They are soluble in amide-type solvents like N,N-dimethylacetamide and gave translucent and ductile films by casting from the solutions. These block copolymers start to decompose around 300°C.
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Kajiyama, M., Nishikata, Y., Kakimoto, Ma. et al. Synthesis and Properties of Block Copolymers Based on Amine-Terminated Polydimethylsiloxane and Aromatic Polyamides. Polym J 18, 735–740 (1986). https://doi.org/10.1295/polymj.18.735
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DOI: https://doi.org/10.1295/polymj.18.735
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