聚乙烯四甲颗粒大小对工程水泥复合材料性能的影响
Shijia Chen1, Runan Liu1, Liuyi Liu1
1School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China.
Polymers
|August 10, 2024
概括
这项研究表明,在工程水泥复合材料 (ECC) 中使用回收聚乙烯二甲 (PET) 聚合物可以提高可加工性和拉伸性能,更小的PET颗粒大小提供最佳性能. 然而,压力强度受到负面影响.
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.
- 可持续的建筑材料 可持续的建筑材料
背景情况:
- 工程混凝土复合材料 (ECC) 提供增强的柔性和裂控制.
- 用聚乙烯二甲 (PET) 等回收材料取代天然聚合物对于可持续建筑至关重要.
- 回收聚合物的颗粒大小对ECC性能的影响需要详细调查.
研究的目的:
- 研究不同聚乙烯二甲 (PET) 聚合物颗粒大小对PET改性工程水泥复合材料 (P-ECC) 性能的影响.
- 分析P-ECC的微观结构变化和故障机制.
- 通过了解PET聚合物大小的作用来优化P-ECC性能.
主要方法:
- 使用不同颗粒大小 (21微米,107微米,244微米) 的PET聚合物制备P-ECC.
- 评估可加工性,机械性能 (压力和单轴拉伸强度) 和微观结构.
- 对界面过渡区 (ITZ) 和裂纹图案进行显微镜分析.
主要成果:
- 加入PET聚合物提高了P-ECC可加工性,降低了自身重量,但压力强度降低.
- 较小的PET颗粒尺寸 (21微米和107微米) 显著增强了单轴拉伸强度和最终应变,具有显著的裂纹控制.
- 较大的PET颗粒大小 (244微米) 与传统的ECC相比,导致拉伸性能较低,与更广泛的ITZ和透性增加有关.
结论:
- 聚乙烯聚合物的颗粒大小极大地影响P-ECC性能,特别是其拉伸性能和柔性.
- 优化PET聚合物的尺寸是利用其对增强ECC性能的好处的关键.
- 这项研究提供了关于利用再生PET开发先进,可持续的水泥复合材料的见解.
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