Poly(l-lactide) (PLL) has been blended with a polycaprolactone-based thermoplastic polyurethane (TPU) elastomer as a toughening agent and a poly(l-lactide-co-caprolactone) (PLLCL) copolymer as a compatibilizer. Both 2-component (PLL/TPU) and 3-component (PLL/TPU/PLLCL) blends were prepared by melt mixing, characterized, hot-pressed into thin sheets and their tensile properties tested. The results showed that, although the TPU could toughen the PLL, the blends were largely immiscible leading to phase separation. However, addition of the PLLCL copolymer improved blend compatibility. The best all-round properties were found for the 3-component blend of composition PLL/TPU/PLLCL = 90/10/10 parts by weight.
Bibliographical noteThis is the peer reviewed version of the following article: Suthapakti, K., Molloy, R., Punyodom, W., Nalampang, K., Leejarkpai, T., Topham, P. D., & Tighe, B. J. (2015). Preparation and property testing of compatibilized poly(l-lactide)/thermoplastic polyurethane blends. Macromolecular symposia, 354(1), 299-304, which has been published in final form at http://dx.doi.org/10.1002/masy.201400057. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
- immiscible blend
- poly(l -lactide)
- poly(l -lactide-co-caprolactone
- thermoplastic polyurethane elastomer