High performance bio-based polyurethane elastomers: Effect of different soft and hard segments |
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| Authors: | Bin Cui Qing-Yun Wu Lin Gu Liang Shen Hai-bin Yu |
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| Institution: | 1. Key Laboratory of Marine Materials and Related Technologies, Key Laboratory of Marine Materials and Protective Technologies of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences, Ningbo 315201, China;Department of Polymer and Coating, Jiangxi Science & Technology Normal University, Nanchang 330013, China;2. Department of Polymer Science and Engineering, Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China;3. Key Laboratory of Marine Materials and Related Technologies, Key Laboratory of Marine Materials and Protective Technologies of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences, Ningbo 315201, China;4. Department of Polymer and Coating, Jiangxi Science & Technology Normal University, Nanchang 330013, China |
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| 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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| Keywords: | Polylactide diols Bio-based polyurethane Shape memory Biocompatibility |
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