合成对聚合物改性的风学特性的影响
Marek Iwański1, Małgorzata Cholewińska1, Grzegorz Mazurek1
1Department of Transportation Engineering, Faculty of Civil Engineering and Architecture, Kielce University of Technology, Al. Tysiąclecia Państwa Polskiego 7, 25-314 Kielce, Poland.
Materials (Basel, Switzerland)
|July 12, 2025
概括
合成的添加改善了聚合物改性 (PMB) 的性能,通过减轻老化过程中的刚性损失. 使用不到2.5%的合成观察到最优的结果,提高了粘合剂的耐用性和道路材料的弹性.
科学领域:
- 材料科学与工程 材料科学与工程
- 土木工程 土木工程是指土木工程.
- 聚合物化学 聚合物化学
背景情况:
- 聚合物改性 (PMB) 对于耐用的青路面至关重要.
- 衰老过程,如短期 (RTFOT) 和长期 (PAV) 的衰老,可以降低PMB的性能,特别是刚性.
- 了解添加剂对PMB老化的影响对于改善路面性能和寿命至关重要.
研究的目的:
- 评估合成含量 (1.5%至3.5%) 在RTFOT和PAV老化过程中对PMB 45/80-65特征的影响.
- 为了确定合成对聚合物的风湿性质和老化行为的影响.
- 评估合成作为修饰剂的有效性,以抵消老化中的聚合物降解.
主要方法:
- 测试了基本的粘合剂特性,包括透指数 (PI) 和可塑性范围 (PR).
- 使用曲束体质计 (BBR) 在零度以下温度 (-10°C至 -28°C) 测量了爬行刚度.
- 通过使用动态剪切风力计 (DSR) 和多重压力爬行恢复 (MSCR) 测试分析了风病学特性,并结合了克里斯森-安德森-马拉斯塔努模型.
主要成果:
- 合成显著影响PMB 45/80-65.5的质特性.
- 添加合成,特别是在2.5%以下的水平,减轻了在老化过程中由聚合物降解引起的刚度降低.
- 关键参数如复杂粘度 (η*),零剪切粘度 (η0),动态模量 (G*) 和不可逆转的爬行合规性 (Jnr) 被评估以量化性能变化.
结论:
- 合成作为有效的添加剂,增强PMB 45/80-65.5的耐老化性能.
- 合成的最佳度,以减轻老化过程中的刚性损失,低于2.5%.
- 这项研究为优化PMB配方提供了有价值的见解,以改善长期路面性能.
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