回收聚乙烯二甲 (rPET) /废大理石粉尘复合材料的热,热力学和结构性质
László Lendvai1, Tej Singh2, Ferenc Ronkay3
1Department of Materials Science and Engineering, Széchenyi István University, H-9026, Győr, Hungary.
Heliyon
|February 6, 2024
概括
废旧大理石灰尘有效地增强了回收聚乙烯二甲酸盐 (rPET) 复合材料,提高了刚性和热稳定性. 然而,高填充剂含量会导致颗粒聚合和效率降低.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 废物管理 废物管理
背景情况:
- 回收聚乙烯二甲酸盐 (rPET) 是一个普遍存在的塑料废物.
- 结合像大理石灰尘 (MD) 这样的废物材料,可以创建可持续的复合材料.
- 从废物流中开发环保材料对于环境可持续性至关重要.
研究的目的:
- 研究使用废大理石灰尘 (MD) 作为回收聚乙烯二甲酸盐 (rPET) 复合材料中的强化填充剂的潜力.
- 评估RPET-MD复合材料的结构,热和机械性能.
- 为了确定大理石灰尘的最佳含量,以便有效地加强.
主要方法:
- 使用挤出和注射成型制造,制造具有不同MD含量 (0-20 wt%) 的rPET-MD复合材料.
- 使用里叶变换红外光谱 (FTIR),差分扫描热度计 (DSC),热重度计分析 (TGA) 和动态机械分析 (DMA) 进行了表征.
- 使用扫描电子显微镜 (SEM) 进行微结构分析.
主要成果:
- 大理石灰尘作为核化剂,增加了结晶温度,但降低了RPET的整体结晶性.
- 热稳定性略有提高,主要分解温度从446°C上升到451°C,占MD的20%重量.
- 动态机械分析 (DMA) 表明温度范围内的刚度有所改善,组件相互作用良好,高达5重%的MD.
- 超过5重%的MD导致了填充剂聚合,并降低了强化效率,由SEM证实.
结论:
- 废旧大理石灰尘可以有效地作为rPET复合材料的增强材料.
- 在较低的大理石粉尘度 (高达5 wt%) 达到最佳性能,这是由于高负载时的聚合问题.
- 该研究展示了一种可行的方法,可以从废物中制造出更可持续和机械强大的聚合物复合材料.
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