| Molecular Dynamics Simulation Study on Damping Mechanism of C5 Petroleum Resin/CIIR Composites for Commercial Vehicle Damping Bearing |
| Received:September 11, 2021 Revised:September 11, 2021 |
| DOI：10.12136/j.issn.1000-890X.2023.01.0013 |
| Key Words: words：CIIR；C5 petroleum resin；composite；commercial vehicle；damping bearing；molecular dynamics simulation；damping mechanism |
| Author Name | Affiliation | E-mail | | YIN Chao | China National Heavy Duty Truck Group | 2297414873@qq.com | | MA Junfang* | China National Heavy Duty Truck Group | majunfan@163.com | | CHEN Rong | China National Heavy Duty Truck Group | |
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| Abstract: |
| 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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