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Solvent- and Catalyst-free Synthesis, Hybridization and Characterization of Biobased Nonisocyanate Polyurethane (NIPU)

Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
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Polymers 2019, 11(6), 1026; https://doi.org/10.3390/polym11061026
Received: 15 May 2019 / Revised: 4 June 2019 / Accepted: 6 June 2019 / Published: 10 June 2019
(This article belongs to the Special Issue Bio-Based Polymers for Engineered Green Materials)
Nonisocyanate polyurethane (NIPU) is a research hotspot in polyurethane applications because it does not use phosgene. Herein, a novel method of solvent- and catalyst-free synthesis of a hybrid nonisocyanate polyurethane (HNIPU) is proposed. First, four diamines were used to react with ethylene carbonate to obtain four bis(hydroxyethyloxycarbonylamino)alkane (BHA). Then, BHA reacted with dimer acid under condensation in the melt to prepare four nonisocynate polyurethane prepolymers. Further, the HNIPUs were obtained by crosslinking prepolymers and resin epoxy and cured with the program temperature rise. In addition, four amines and two resin epoxies were employed to study the effects and regularity of HNIPUs. According to the results from thermal and dynamic mechanical analyses, those HNIPUs showed a high degree of thermal stability, and the highest 5% weight loss reached about 350 °C. More importantly, the utilization of these green raw materials accords with the concept of sustainable development. Further, the synthetic method and HNIPUs don’t need isocyanates, catalysts, or solvents. View Full-Text
Keywords: hybrid nonisocyanate polyurethane; solvent- and catalyst-free; dimer acid; melt condensation hybrid nonisocyanate polyurethane; solvent- and catalyst-free; dimer acid; melt condensation
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MDPI and ACS Style

He, X.; Xu, X.; Wan, Q.; Bo, G.; Yan, Y. Solvent- and Catalyst-free Synthesis, Hybridization and Characterization of Biobased Nonisocyanate Polyurethane (NIPU). Polymers 2019, 11, 1026. https://doi.org/10.3390/polym11061026

AMA Style

He X, Xu X, Wan Q, Bo G, Yan Y. Solvent- and Catalyst-free Synthesis, Hybridization and Characterization of Biobased Nonisocyanate Polyurethane (NIPU). Polymers. 2019; 11(6):1026. https://doi.org/10.3390/polym11061026

Chicago/Turabian Style

He, Xin, Xiaoling Xu, Qian Wan, Guangxu Bo, and Yunjun Yan. 2019. "Solvent- and Catalyst-free Synthesis, Hybridization and Characterization of Biobased Nonisocyanate Polyurethane (NIPU)" Polymers 11, no. 6: 1026. https://doi.org/10.3390/polym11061026

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