Abstract
In this work, a series of high performance bio-based polyurethanes (bio-PUs) were synthesized from polylactide (PLA)-based diols, different diisocyanates (TDI, MDI, HDI, IPDI) and chain extender 1,4-butanediol, in which different soft and hard segments are used to adjust their transition temperatures and mechanical properties. Poly(lactide-co-caprolactone) copolymer diols (co-PLAols) instead of PLA diols as the soft segment improved the thermal stability and mechanical properties of the synthesized bio-PUs. Among them, MDI-based bio-PUs have the highest T g (43.8 °C), tensile strength (23.5 MPa) and modulus (380.8 MPa), while HDI-based bio-PUs have the lowest T g (21.4 °C) and highest elongation at break (580%). Especially, the bio-PUs synthesized from co-PLAols and MDI demonstrate better mechanical properties, closed to petroleum-based commodities. Furthermore, the obtained bio-PUs display good shape memory properties at body temperature and cytocompatibility. Therefore, these bio-PUs are promising for applications in biomedical fields.
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The research is financially supported by the National Natural Science Foundation of China (No. 21404112), Ningbo Key Scientific and Technological Project (No. 2014B10023), Ningbo Natural Science Foundation (No. 2015A610016), Open Project of Key Laboratory of Marine Materials and Related Technologies (No. 2016K07) and Ningbo Science and Technology Innovation Team (No. 2015B11003).
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Cui, B., Wu, QY., Gu, L. et al. High performance bio-based polyurethane elastomers: Effect of different soft and hard segments. Chin J Polym Sci 34, 901–909 (2016). https://doi.org/10.1007/s10118-016-1811-7
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DOI: https://doi.org/10.1007/s10118-016-1811-7