硫扩散研究模仿回收的地面含化合物
Stefan Frosch1,2, Volker Herrmann1, Tim Schülein1
1Faculty of Plastics Engineering and Surveying, Technical University of Applied Sciences Würzburg-Schweinfurt, 97070 Würzburg, Germany.
Polymers
|November 27, 2024
概括
将回收磨砂 (GR) 纳入火山化物中,由于硫扩散到GR中,会降低其性能. 这项研究揭示了硫迁移对交叉连接密度和粘弹性质的影响,影响材料性能.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 技术 技术 技术
背景情况:
- 将回收磨砂 (GR) 纳入矩阵通常会导致内性能恶化.
- 这种恶化部分归因于硫从基质扩散到GR中,减少了交联密度.
研究的目的:
- 为了研究含有GR的化合物中硫的扩散.
- 为了在空间上将硫度与局部粘弹性质相关联.
- 了解硫扩散对交叉链密度和材料性能的影响.
主要方法:
- 微X射线光 (Micro-XRF) 分析以调查局部硫扩散.
- 微动力机械缩 (Micro-DMI) 用于确定空间粘弹性特性.
- 微XRF和微DMI数据的综合分析.
主要成果:
- 观察到硫扩散发生在几毫米的范围内,局部将硫度增加了一倍.
- 在GR和矩阵材料之间的接口上发现了交叉连接密度的显著差异.
- 观察到高达100%的弹性刚度局部增加.
- 发现聚合物的火山化特征会影响硫扩散的程度.
结论:
- 硫扩散到回收磨砂中会对矩阵和GR中的交联密度的均性产生负面影响.
- 硫的空间再分配显著改变了局部粘弹性特性,导致性能降低.
- 了解硫扩散对于优化在化物中使用回收至关重要.
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