Degradable Polymers. III. Synthesis and Characterization of Aliphatic Thermoplastic Block Copolyesters

1 August 1987

journal article
research article
Published by Taylor & Francis in Journal of Macromolecular Science, Part A

Vol. 24 (8) , 977-990
https://doi.org/10.1080/00222338708076930

Abstract

A group of new block copolymers has been synthesized and characterized. The copolyesters were step-polymerized with six different poly-ether feeds, ranging from 21.1 to 53.3 mol%. The resulting polyethylene succinate)-b-poly(tetramethylene glycol) (PES/PTMG) polymers were characterized by GPC, DSC, IR, and NMR, and tensile strength measurements were performed. The molar composition of the polymers was determined by NMR and also correlated with IR. The compositions of the polymers agree well with those expected from the composition of the feed. Fibers for tensile strength measurements were extruded, and samples for dynamic mechanical tests (DMTA) were compression molded. The crystallinity, the melting temperature, the fiber strength, and the elastic bending modulus decreased with increasing polyether content, whereas the breaking strain increased.

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