Poly(ether/ester)s based on poly(butylene terephthalate) and poly(ethylene glycol), 1. Poly(ether/ester)s with various polyether: polyester ratios

Wiley - Tập 191 Số 3 - Trang 603-614 - 1990
S. Fakirov1, Tanya Gogeva1
1Laboratory on Structure and Properties of Polymers, University of Sofia, 1126 Sofia, Bulgaria

Tóm tắt

AbstractA series of poly(ether/ester)s 1 based on poly(butylene terephthalate)Systematic IUPAC nomenclature: poly(oxytetramethyleneoxyterephthaloyl). and poly(ethylene glycol) is synthesized. 1H and 13C nuclear magnetic resonance, infrared and differential scanning calorimetry (DSC) measurements prove a block structure of the prepared copolymers. The DSC curves suggest the existence of a three‐phase morphology — two amorphous phases for both polyether and polyester segments, and a crystalline phase for the polyester segments. Small angle X‐ray scattering (SAXS) measurements lead to the same conclusion. The degree of crystallinity assigned to the polyester fraction differs insignificantly and is similar to that of the homopolymer. SAXS data show approximately the same long spacing for all crystallizable copolymers. The tensile parameters of the studied polymers are similar to those of available commercial products based on poly(butylene terephthalate) and poly(tetrahydrofuran).

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Wiley

Tập 191 Số 3

603-614

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