Designing a Polymer-Based Hybrid with Simultaneously Improved Mechanical and Damping Properties via a Multilayer Structure Construction: Structure Evolution and a Damping Mechanism
Designing a Polymer-Based Hybrid with Simultaneously Improved Mechanical and Damping Properties via a Multilayer Structure Construction: Structure Evolution and a Damping Mechanism
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通过多层结构构造设计同时改进机械和阻尼性能的聚合物混合材料：结构演化和阻尼机制
DOI：
10.3390/polym12020446
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发表时间：
2020-02-01
期刊：
影响因子：
5
通讯作者：
Zhang, Fengshun
中科院分区：
文献类型：
--
作者：
Xu, Kangming;Hu, Qiaoman;Zhang, Fengshun
尽管受阻酚/聚合物基杂化阻尼材料具有优异的损耗因子，受到越来越多的关注，但其机械性能显着下降和阻尼温度范围窄限制了此类材料的应用。为了解决这些问题，本研究制备了不同层数的聚氨酯（受阻酚）/聚醋酸乙烯酯多层体系。首先通过扫描电子显微镜验证了多层微结构。随后的分子动力学模拟定量地揭示了聚氨酯（受阻酚）层和聚醋酸乙烯酯层的扩散促进、聚氨酯（受阻酚）层的紧密链堆积、聚醋酸乙烯酯层的长链堆积、三种组分之间的分子间氢键以及两层之间增强的界面相互作用。此外，机械和动态机械分析检测到多层混合材料的成功制备，同时提高了机械和阻尼性能。然后，通过分子动力学模拟与实验相结合，建立了多层杂化材料的结构演化与性能之间的关系，有望对工业生产具有一定的指导意义。
Though hindered phenol/polymer-based hybrid damping materials, with an excellent loss factor, attract more and more attention, the significantly decreased mechanical property and the narrow damping temperature range limit the application of such promising materials. To solve the problems, a polyurethane (hindered phenol)/polyvinyl acetate multilayer system with varied layer numbers was prepared in this study. The multilayer microstructures were first verified through the scanning electron microscopy. A subsequent molecular dynamics simulation revealed the promoted diffusion of polyurethane (hindered phenol) and polyvinyl acetate layers, the compact chain packing of the polyurethane (hindered phenol) layer, the extended chain packing of the polyvinyl acetate layer, the intermolecular hydrogen bonds among the three components and the enhanced interface interactions between the two layers in a quantitative manner. Further the mechanical and dynamic mechanical analysis detected the successful preparation of the multilayer hybrids with simultaneously improved mechanical and damping properties. Then, by a combination of molecular dynamics simulation and experiment, the relationship between the structure evolution and the properties of the multilayer hybrids was established, which was expected to have some guiding significance for industrial production.