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Study on physicochemical properties of poly(ester-urethane) derived from biodegradable poly(ε-caprolactone) and poly(butylene succinate) as soft segments


Novel biodegradable polyester-based polyurethanes were developed based on poly(ε-caprolactone) diol (PCL diol) and poly(butylene succinate) diol (PBS diol) as the biodegradable soft segments (SS), and diisocyanate and 1,4-butanediol (BDO) as the hard segment (HS). The PBS diol (\( \overline{{M_{\text{n}} }} \) = 2000 g/mol) was successfully synthesized by melt condensation. The PBS diol and polyurethane sheets were characterized for chemical structure using NMR and FTIR techniques. The effect of hard segments and diisocyanate type on thermo-mechanical properties and hydrolytic degradation were examined by means of tensile testing, TGA, DSC and DMTA. The stress–strain curves of PURs reached the high 715 % elongation at break, 32.5 MPa tensile strength, and 123.8 MPa Young’s modulus. Increased hard segment content increased the tensile properties, thermal resistance and T g, but the hydrolytic degradation rate decreased. The IPDI-based polyurethane gave lower tensile properties, T g and hydrolytic degradation rate, but higher thermal stability than the TDI-based polyurethane.

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This research was financially supported by the Higher Education Research Promotion and National Research University Project of Thailand, Office of the Higher Education Commission (SIT580645S) and by Prince of Songkla University, Surat Thani Campus, 2015. The authors would like to express their gratitude to the Faculty of Science and Industrial Technology, Prince of Songkla University, Surat Thani Campus. We also thank Assoc. Prof. Dr. Seppo Karrila for assistance with manuscript preparation.

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Correspondence to Wannarat Panwiriyarat.

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Panwiriyarat, W., Tanrattanakul, V. & Chueangchayaphan, N. Study on physicochemical properties of poly(ester-urethane) derived from biodegradable poly(ε-caprolactone) and poly(butylene succinate) as soft segments. Polym. Bull. 74, 2245–2261 (2017).

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  • Polyurethane
  • Poly(ε-caprolactone)
  • Poly(butylene succinate)
  • Biodegradable polymers