Biodegradable poly(ethylene succinate) blends and copolymers containing minor amounts of poly(butylene succinate)

Abstract

Poly(ethylene succinate) (PES), poly(butylene succinate) (PBS), and PES-rich copolyesters were synthesized using an effective catalyst, titanium tetraisopropoxide. PES was blended with minor amounts of PBS for the comparison. The compositions of the copolyesters and the blends were determined from NMR spectra. Their thermal properties were studied using a differential scanning calorimeter (DSC), a temperature modulated DSC (TMDSC), and a thermogravimetric analyzer. No significant difference exists among the thermal stabilities of these polyesters and blends. For the blends, the reversible curves of TMDSC showed a distinct glass-rubber transition temperature (T g ), however, the variation of the T g values with the blend compositions was small. Isothermal crystallization kinetics and the melting behavior after crystallization were examined using DSC. Wideangle X-ray diffractograms (WAXD) were obtained for the isothermally crystallized specimens. The results of DSC and WAXD indicate that the blends have a higher degree of crystallinity and a higher melting temperature than those of the corresponding copolymers.

Biological compatibility, thermal and in vitro simulated degradation for poly(p‐dioxanone)/poly(lactide‐co‐glycolide)/poly(ethylene succinate‐co‐glycolide)

“…As shown in Figure 4, there are two 2θ peaks appearing at 20.2° and 23.2° in the X‐ray diffraction spectra of PES and PES‐b‐PGA, indicating the presence of two crystal structure patterns in PES segments in both the PES and PES‐b‐PGA, which are similar to those reported in the literatures 32,35,36 . With the increase of r GA/ES , the x‐ray diffraction peak intensity of the two crystals of the PES chain segments in PES‐b‐PGA gradually decreased.…”

A green strategy for the synthesis of poly(ethylene succinate) and its copolyesters via enzymatic ring opening polymerization

“…A close examination of these spectra allowed ascertaining the those previously reported for similar copolyesters prepared by chemical methods. 21,22 Although the values measured for the copolyesters made from caprolactone and Llactide could not be contrasted in the same way because these copolyesters have not been described so far in the accessible literature, the behaviour observed for both Table 2 PES copolyesters prepared by e-ROP. as a green alternative for the synthesis of PES homo-and co-polyesters, in particular when these materials are intended to be used in biomedical applications.…”

“…[17][18][19] This polyester is currently under vigorous investigation addressed to create PEScopolyesters suitable for new demanding biomaterial applications. [20][21][22] The polycondensation methods usually provide polyesters with moderate molecular weights and they all require the concourse of organometallic catalysts.…”