盐溶液环境对 styrene-butadiene-styrene (SBS) 改性青的衰老的影响
Chengwei Xing1,2, Bohan Zhu1,2, Kingsley C K Chiang3
1Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, South 2nd Ring Road Middle Section, Xi'an 710064, China.
Polymers
|June 27, 2024
概括
海盐加快了青的老化,增加了基础青和改性青的硬度. 修改过氨酸-丁氨酸-氨酸 (SBS) 的青显示出更好的抗性,但随着盐度的变化,其性能变得复杂.
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:
- 青路面的耐用性对基础设施至关重要.
- 海盐侵蚀对青路面的寿命构成重大挑战.
- 了解盐水环境中的青老化机制对于材料选择和性能预测至关重要.
研究的目的:
- 在海盐侵蚀环境中研究青的老化机制,使用风学分析.
- 在模拟的海盐条件下,评估基本青和修改为 styrene-butadiene-styrene (SBS) 的青的耐老性.
- 为了确定不同度的盐 (NaCl和Na2SO4) 对老青的气质特性的影响.
主要方法:
- 模拟的海盐老化试验,包括浸泡在NaCl和Na2SO4溶液中.
- 薄膜炉试验 (TFOT) 和压力老化容器 (PAV) 用于初始老化.
- 动态剪切风湿计 (DSR) 测试包括温度扫描 (TS),频率扫描 (FS) 和多重应力爬行和恢复 (MSCR).
主要成果:
- 在混合盐溶液中老化后,基质和SBS修改的青样本都表现出硬度增加.
- 与海盐环境中的基本青相比,SBS改性青表现出优越的耐老化能力.
- 由于SBS降解和基础青老化,SBS修改青的风质特性变得更加复杂,盐溶液度因SBS降解和基础青老化而变化.
结论:
- 海盐侵蚀显著影响青的老化,导致硬度增加.
- 修改SBS增强了青对海盐诱导的衰老的抵抗力.
- 陈旧的SBS改性青的复杂行为需要进一步研究,以优化沿海地区的路面性能.
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