For hindered phenol (HP)/polymer‐based hybrid damping materials, the unclear relationship between the structure of HP and the damping properties limits the application of such promising materials. Herein, three kinds of HPs with different chain lengths were synthesized to explore the mechanism. The structures of the HPs were confirmed by nuclear magnetic resonance spectrum, the Fourier Transform Infrared Spectroscopy (FT‐IR), and X‐ray Diffraction (XRD). For further prepared HP/polyurethane hybrids, FT‐IR and XRD were adopted to confirm the hydrogen bonding interactions and micromorphologies. Moreover, molecular dynamics simulation was used to characterize the effects of chain length variation on the inter‐ and intramolecular hydrogen bonds (HBs) and the chain packing of the hybrids in a quantitative manner. Subsequently, combined with the dynamic mechanical analysis, the relationship between the chain length variation and the damping properties was established. The results showed that with the increasing of chain length, the intramolecular HBs between HPs can be prevented, and the loose HP chain within tight polymer matrix can be achieved, which results in a maximum increase of loss factor. While the homogeneity of the chain packing increases with the chain length increasing, which results in a decrease of the temperature range of loss factor ≥ 0.3. POLYM. ENG. SCI., 60:446–454, 2020. © 2019 Society of Plastics Engineers

中文翻译：

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对受阻酚对聚合物基杂化材料的分子相互作用和阻尼特性的链长影响的分子洞察

对于受阻酚（HP）/聚合物基混合阻尼材料，HP结构与阻尼特性之间的不清楚关系限制了此类有前途的材料的应用。在此，合成了三种不同链长的HP，以探讨其机理。通过核磁共振光谱，傅立叶变换红外光谱（FT-IR）和X射线衍射（XRD）确认了HP的结构。对于进一步制备的HP /聚氨酯杂化物，采用FT-IR和XRD确认氢键相互作用和微观形貌。此外，使用分子动力学模拟以定量方式表征了链长变化对分子间和分子内氢键（HBs）和杂合子链堆积的影响。随后，结合动态力学分析，建立了链长变化与阻尼特性之间的关系。结果表明，随着链长的增加，可以防止HPs之间的分子内HBs，并在紧密的聚合物基体内实现HP链的疏松，从而最大程度地提高了损失因子。链长的均匀性随链长的增加而增加，导致损耗因子≥0.3的温度范围减小。POLYM。ENG。SCI。，60：446–454，2020.©2019塑料工程师协会 并且可以在紧密的聚合物基质中获得松散的HP链，从而最大程度地提高了损耗因子。链长的均匀性随链长的增加而增加，导致损耗因子≥0.3的温度范围减小。POLYM。ENG。SCI。，60：446–454，2020.©2019塑料工程师协会 并且可以在紧密的聚合物基质中获得松散的HP链，从而最大程度地提高了损耗因子。链长的均匀性随链长的增加而增加，导致损耗因子≥0.3的温度范围减小。POLYM。ENG。SCI。，60：446–454，2020.©2019塑料工程师协会