| 商用车C5石油树脂/CIIR复合材料减震支座阻尼机理的分子动力学模拟研究 |
| Molecular Dynamics Simulation Study on Damping Mechanism of C5 Petroleum Resin/CIIR Composites for Commercial Vehicle Damping Bearing |
| 投稿时间：2021-09-11 修订日期：2021-09-11 |
| DOI：10.12136/j.issn.1000-890X.2023.01.0013 |
| 中文关键词: 氯化丁基橡胶 C5石油树脂 复合材料 商用车 减震支座 分子动力学模拟 阻尼机理 |
| 英文关键词: words：CIIR C5 petroleum resin composite commercial vehicle damping bearing molecular dynamics simulation damping mechanism |
| 基金项目: |
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| 中文摘要: |
| 采用分子动力学模拟和统计分析对商用车C5石油树脂/氯化丁基橡胶（CIIR）复合材料减震支座的阻尼机理进行研究。结果表明：随着C5石油树脂用量的增大，C5石油树脂/CIIR复合材料的结合能（Eb）增大，在改善复合材料的阻尼性能方面分子间范德华力起主导作用；复合材料的自由体积分数（FFV）和均方位移（DMS）减小，C5石油树脂起反增塑剂的作用；复合材料的玻璃化温度（Tg）升高，有效阻尼温域（ΔT）增大，C5石油树脂可改善复合材料的阻尼性能。C5石油树脂/CIIR复合材料的ΔT和Tg均与Eb和FFV之间存在显著的线性关系。本研究从分子层面分析复合材料的阻尼机理，形成定量预测复合材料的阻尼性能的理论方法，为商用车减震支座复合材料的配方优化奠定了基础。 |
| 英文摘要: |
| The damping mechanism of C5 petroleum resin/chlorinated butyl rubber（CIIR） composites
for commercial vehicle damping bearing was studied by molecular dynamics simulation and statistical
analysis. The results showed that with the increase of the amount of C5petroleum resin，the binding energy（Eb）
of the C5 petroleum resin/CIIR composites increased，and the intermolecular van der Waals force played
a leading role in improving the damping properties of the composites. The free volume fraction（FFV） and
mean square displacement（DMS） of the composites decreased，indicating that C5 petroleum resin acted as an
anti-plasticizer. The glass transition temperature（Tg） of the composites increased and the effective damping
temperature range（ΔT）expanded，showing that C5 petroleum resin could improve the damping properties of
the composites. It was found that the ΔT and Tg of the C5 petroleum resin/CIIR composites had significant
linear correlations with the Eb and FFV. This study analyzed the damping mechanism of the composites from
the molecular level and established a the oretical method to quantitatively predict the damping properties of
the composites，which laid a foundation for the formulation optimization of the composites for commercial
vehicle damping bearing. |
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