用聚氨和西兰合剂增强的青混合物的微观机制:基于分子动力学模拟的研究
Zhi Lin1, Weiping Sima1, Xi'an Gao1
1School of Civil Engineering, Sichuan University of Science & Engineering, Zigong 643000, China.
Polymers
|June 27, 2025
概括
聚氨 (PU) 作为一个热混合青修饰剂可以减少排放. 西兰合剂 (SCAs) 增强了PU改性青的低温和水稳定性,满足性能要求.
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:
- 传统的青改造通常需要高温,导致严重的污染.
- 聚氨 (PU) 由于加工温度较低,因此具有作为热混合青改性材料的潜力.
- 改性青可能在低温性能和耐水性方面表现出局限性.
研究的目的:
- 研究聚氨 (PU) 作为热混合青改性剂,以减少排放.
- 为了提高PU改性青的低温性能和水稳定性,使用西兰合剂 (SCAs).
- 为了确定最佳的PU含量,并评估不同的SCAs (KH-550与KH-570) 的有效性.
主要方法:
- 微观分析 (微粘度,RDFs) 来确定最佳的PU含量.
- 用SCAs评估接口特性 (粘附工作,粘附深度,热稳定性).
- 宏观性能评估 (强度,耐温度,水稳定性) 与SBS改性青相对应.
主要成果:
- 最佳PU含量确定为20.8%.
- 用PU修饰的青在高温性能和强度方面表现出优势,但在低温性能和水稳定性下降.
- SCAs显著提高了低温和水稳定性,满足了规格要求.
- 由于与PU的化学反应,KH-550表现出比KH-570更好的界面强化.
结论:
- 聚烯是一种可行的热混合青修饰剂,用于减少排放.
- SCAs,特别是KH-550,对于克服PU改性青在低温和水稳定性方面的局限性至关重要.
- 优化的PU-SCA改性青符合实际应用的性能标准.
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