高强度回收高密度聚乙烯:评估针对聚合物微结构的新途径
Giulia Bernagozzi1,2, Rossella Arrigo1,2, Alberto Frache1,2
1Department of Applied Science and Technology, Politecnico di Torino, Viale Teresa Michel 5, 15121 Alessandria, Italy.
Polymers
|February 13, 2025
概括
回收的高密度聚乙烯 (HDPE) 可以再循环加工成高性材料. 一种添加剂将降解的HDPE转化为长链分支结构,显著提高纤维柔性,提高塑料循环性.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 热塑性塑料的机械回收,特别是聚烯,通常会产生与原始塑料相比具有降解性质的材料.
- 这种性能降解源于在使用和再加工过程中由热和机械应力引起的微观结构变化.
- 开发方法来提高回收塑料的性能对于可持续的材料管理和实现循环经济至关重要.
研究的目的:
- 提出一种生产高强度回收高密度聚乙烯 (HDPE) 的方法.
- 研究一种特定的添加剂的使用,以改善再生HDPE的微观结构和可加工性.
- 为了证明回收HDPE升级成高价值产品的潜力.
主要方法:
- 在回收HDPE的再加工过程中使用商业添加剂 (Nexamite® R305).
- 利用添加剂在热力学降解过程中促进长链分支的能力.
- 从改造的回收HDPE中制成的纤维,并进行了拉伸性特征.
主要成果:
- 该添加剂成功诱导了回收HDPE中的长链分支微结构.
- 由添加剂修改的HDPE生产的纤维显示出明显改善的柔性,在60的拉力比率下,破裂时的延长率为350%,拉力比率为60.
- 经过修改的材料在延伸流应用中显示出增强的可加工性.
结论:
- 该研究提出了一种可行的策略,用于将回收HDPE升级为具有优越性质的材料.
- 使用Nexamite® R305可将降解的回收HDPE转化为适合高价值应用的长链分支结构.
- 这种方法有助于实现全面的塑料循环,使高性能回收材料的创造成为可能.
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