废旧聚合物塑料的再利用:SBS改性青中的强度增强和接口机制的分子动力学研究
Tengfei Nian1, Haowen Sun1, Xinhui Li2
1School of Civil and Hydraulic Engineering, Lanzhou University of Technology, Lanzhou, Gansu, China. tengfeinian@lut.edu.cn.
Physical chemistry chemical physics : PCCP
|August 29, 2025
概括
这项研究使用分子动力学来分析聚乙烯 (PE) 和聚烯 (PP) 等塑料如何影响老化的SBS改性青. 塑料分散了青,提高了热稳定性和耐裂性,而PE显示了最大的增强.
科学领域:
- 材料科学
- 化学工程
- 聚合物科学
背景情况:
- 塑料提高了青路面的性能,但它们对老化SBS改性青的分子水平影响尚不清楚.
- 关于不同类型的塑料如何在分子层面影响青老化行为的理论分析是有限的.
研究的目的:
- 通过分子动力学模拟,研究SBS改性青与各种塑料 (PE,PP,PA) 的分子级老化行为.
- 分析塑料对老化SBS改性青的热力学和机械性能的扩散行为和影响.
主要方法:
- 使用分子动力学软件模拟SBS修改的青与聚乙烯 (PE),聚烯 (PP) 和聚烯 (PA) 的老化行为.
- 分析了热力学参数 (MSD,RDF,FFV,相对度) 和机械性能,以评估塑料的扩散和影响.
- 在经过SBS改性青中计算的PE,PP和PMA表面能量值.
主要成果:
- 在经过SBS修改的青中,塑料分子分散在青成分周围,破坏聚合并改善分散,从而提高了热稳定性.
- 表面能量增加:与老化SBS改性青相比,PE增加了27.02%,PP增加了7.74%,PMA增加了11.84%.
- 加入塑料,特别是PE,显著提高了经过SBS改性青的抗裂性能.
结论:
- 塑料通过改变分子结构和增强分散,有效地提高了SBS改性青的老化性能.
- 在测试的塑料中,聚乙烯 (PE) 的抗裂性能得到了最显著的改善.
- 这项研究为利用废塑料在分子水平上提高青性能提供了理论见解.
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