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Thermal,mechanical, and morphological properties of soybean oil-based polyurethane/epoxy resin interpenetrating polymer networks (IPNs) |
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| Authors: | Hui Jin Yuge Zhang Chengshuang Wang Yifan Sun Zuanru Yuan Youqiang Pan Hongfeng Xie Rongshi Cheng |
| Institution: | 1. Key Laboratory of High Performance Polymer Materials and Technology (Nanjing University), Ministry of Education, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China 2. Department of Polymer Materials and Engineering, School of Materials Engineering, Yancheng Institute of Technology, Yancheng, 224051, China 3. Modern Analysis Center, Nanjing University, Nanjing, 210093, China 4. National Engineering Laboratory for Advance Road Materials, Jiangsu Transportation Institute, Nanjing, 211112, China |
| Abstract: | A series of interpenetrating polymer networks (IPNs) based on epoxy (EP) resin and polyurethane (PU) prepolymer derived from soybean oil-based polyols with different mass ratios were synthesized. The structure, thermal properties, damping properties, tensile properties, and morphology of soybean oil-based PU/EP IPNs were characterized by Fourier-transform infrared spectroscopy, differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), universal test machine, and scanning electron microscopy (SEM). DSC and DMA results show that the glass transition temperature of the soybean oil-based PU/EP IPN decreases with the increase of PU prepolymer contents. Soybean oil-based PU/EP IPNs have better damping properties than that of the pure epoxy resin. The tensile strength and modulus of PU/EP IPNs decrease, while elongation at break increases with the increase of PU prepolymer contents. SEM observations reveal that phase separation appears in PU/EP IPNs with higher PU prepolymer contents. |
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