Materials Reports  2019, Vol. 33 Issue (z1): 488-490 |
| POLYMERS AND POLYMER MATRIX COMPOSITES |
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| Preparation and Property of Waterborne Polyurethane Obtained with Polycarbonate |
| XUE Xiaowu1,2, WANG Xinwen1, LIU Hongbo2, QING Ning1
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1 School of Biotechnology and Health Science, Wuyi University, Jiangmen 529020
2 School of Applied Chemistry and Biological Technology, Shenzhen Polytechnic, Shenzhen 518055 |
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Abstract A waterborne polyurethane with great stability was prepared and characterized by FT-IR in this work. This study analyzed the impact of different isocyanate index (R=n(NCO)/n(OH)), dimethylolpropionic acid (DMPA) and trimethylolpropane (TMP) content on the physical properties of WPCU. The study contrasts the performance of the best synthetic WPCU and polyester polyurethanes. The research found that: When the isocyanate index is 7, the prepared polycarbonate polyurethane has good mechanical properties. The tensile strength is up to 12.46 MPa, and the water absorption rate is only 25.88%. Adding TMP can increase the degree of crosslinking of the polyurethane. When the amount of TMP is increased from 0.5% to 1.5%, the tensile strength increases from 4.33 MPa to 7.56 MPa, and the elongation at break decreases from 307.12% to 258.53%. In the case of the same molecular weight, the WPCU has higher mechanical properties, hardness of 2H, and tensile strength is 6 times higher compared with the polyester type waterborne polyurethane (PESTUR)
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Published: 05 July 2019
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| About author:: Hongbo Liu, Ph.D., professor, has been engaged in the research and development of special performance resins, composite materials and related fine chemicals. Guangdong professional leading talents, Shenzhen high-level talents, executive director of Shenzhen Coating Technology Society. He has presided over more than 20 various topics, published more than 50 papers in domestic and foreign journals, and applied for 12 invention patents (8 have been authorized).Xiaowu Xue, male, born in April 1992, native of Hefei, Anhui, Han nationality, is a graduate student. His research direction is waterborne polyurethane. |
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