在紫外线衰老后对再生SBS改性青粘合剂的风病学特性和复原机制的比较研究
Fucheng Guo1, Xu He1, Pengfei Zhi2
1Gansu Industry Technology Center of Transportation Construction Materials Research and Application, Lanzhou Jiaotong University, Lanzhou 730070, China.
Materials (Basel, Switzerland)
|March 14, 2026
概括
聚合物基复原剂B通过改善化学稀释和减少大分子,有效地恢复老化的青粘合剂性能. 建议使用老化的SBS改性青,特别是经过紫外线老化后.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 化学工程是化学工程的重要组成部分.
背景情况:
- 紫外线 (UV) 衰老显著降低了氨酸-丁-氨酸 (SBS) 改性青粘合剂的性能.
- 了解再生机制对于延长老青材料的使用寿命至关重要.
研究的目的:
- 为了研究两种复原剂对紫外线老化SBS改性青粘合剂的恢复作用.
- 用先进的分析技术阐明复苏机制.
主要方法:
- 使用动态剪切风湿计 (DSR),曲束风湿计 (BBR) 和多重应力爬行和恢复 (MSCR) 测试进行风湿学评估.
- 通过富里埃变换红外光谱 (FTIR) 和凝浸透色谱 (GPC) 进行化学分析.
主要成果:
- 紫外线老化降低了高温和低温的性能;复原剂B显示出优异的化学稀释和大分子 (LMS) 的减少.
- 复原剂A有效地恢复高温性能和刚性,而复原剂B更好地修复交叉连接的网络.
- 这两种复原剂都恢复了低温性能,硬度和m值恢复有所不同;FTIR显示复原剂B显著降低了碳和硫氧化物指数.
结论:
- 青春剂B推用于老化的SBS改性青粘合剂,特别是经过紫外线老化后,由于其优越的化学稀释和分子重量恢复.
- 该研究提供了关于不同类型的青春剂对老青粘合剂的有效性的见解.
- 进一步的研究可以探索最佳剂量和青春剂B的长期性能.
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