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Fabrication and Properties of a Bio-Based Biodegradable Thermoplastic Polyurethane Elastomer

Key Laboratory of Rubber-Plastics of Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China
Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao 266042, China
Author to whom correspondence should be addressed.
Polymers 2019, 11(7), 1121;
Received: 16 April 2019 / Revised: 13 June 2019 / Accepted: 19 June 2019 / Published: 2 July 2019
(This article belongs to the Special Issue Condensation Polymers and their Applications)
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Using the melt polycondensation of five bio-based aliphatic monomers (succinic acid, sebacic acid, fumaric acid, 1,3-propanediol, and 1,4-butanediol), we first synthesized the more flexible and biodegradable polyester diols (BPD) with an average molecular weight of 3825. Then, the BPD was polymerized with excessive 4,4′-diphenylmethane diisocyanate (MDI). Finally, the molecular chain extender of 1,4-butanediol (BDO) was used to fabricate the biodegradable thermoplastic polyurethane elastomer (BTPU), comprising the soft segment of BPD and the hard segment polymerized by MDI and BDO. Atomic force microscope (AFM) images showed the two-phase structure of the BTPU. The tensile strength of the BTPU containing 60% BPD was about 30 MPa and elongation at break of the BTPU was over 800%. Notably, the BTPU had superior biodegradability in lipase solution and the biodegradation weight loss ratio of the BTPU containing 80% BPD reached 36.7% within 14 days in the lipase solution. View Full-Text
Keywords: polyurethane; thermoplastic; polycondensation; biodegradability; bio-based polyurethane; thermoplastic; polycondensation; biodegradability; bio-based

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Wang, Z.; Yan, J.; Wang, T.; Zai, Y.; Qiu, L.; Wang, Q. Fabrication and Properties of a Bio-Based Biodegradable Thermoplastic Polyurethane Elastomer. Polymers 2019, 11, 1121.

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