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Towards a Stable and High-Performance Hindered Phenol/Polymer-Based Damping Material Through Structure Optimization and Damping Mechanism Revelation

1
College of Materials and Chemical Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, China
2
Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Chongqing 402160, China
3
College of Chemistry, Sichuan University, Chengdu 610065, China
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(5), 884; https://doi.org/10.3390/polym11050884
Received: 27 March 2019 / Revised: 30 April 2019 / Accepted: 9 May 2019 / Published: 15 May 2019
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Abstract

Although hindered phenol/polymer-based hybrid damping materials, with excellent damping performance, attract more and more attention, the poor stability of hindered phenol limits the application of such promising materials. To solve this problem, a linear hindered phenol with amorphous state and low polarity was synthesized and related polyurethane-based hybrid materials were prepared in this study. The structure and state of the hindered phenol were confirmed by nuclear magnetic resonance spectrum, Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). The existence of intermolecular hydrogen bonds (HBs) between hindered phenol and polyurethane was confirmed by FT-IR, and the amorphous state of the hybrids was confirmed by XRD. Moreover, by a combination of molecular dynamics simulation and dynamic mechanical analysis, the relationship between the structure optimization of the hindered phenol and the high damping performance of the hybrids was quantitatively revealed. By constructing the synthetic hindered phenol, the intramolecular HBs between hindered phenols were restricted, while the strength and concentration of the intermolecular HBs increased by increasing the amount of hindered phenol. Thus, intermolecular interactions were enhanced, which lead to the compact chain packing of polyurethane, extended chain packing of hindered phenol, and good dispersion of hindered phenol in polyurethane. Therefore, the stability of the hindered phenol and the damping properties of the hybrids were both improved. The experiment results are expected to provide some useful information for the design and fabrication of high-performance polymeric damping materials. View Full-Text
Keywords: hindered phenol/polymer-based hybrid damping materials; stability; high damping performance; structure optimization; damping mechanism hindered phenol/polymer-based hybrid damping materials; stability; high damping performance; structure optimization; damping mechanism
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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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Xu, K.; Hu, Q.; Wang, J.; Zhou, H.; Chen, J. Towards a Stable and High-Performance Hindered Phenol/Polymer-Based Damping Material Through Structure Optimization and Damping Mechanism Revelation. Polymers 2019, 11, 884.

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