聚烯和聚烯回收中的PLA/PBAT污染的机械和结构后果
Przemysław Postawa1, Tomasz Stachowiak1, Krystyna Malińska2
1Department of Technology and Automation, Faculty of Mechanical Engineering, Czestochowa University of Technology, Armii Krajowej 21 St., 42-201 Czestochowa, Poland.
Materials (Basel, Switzerland)
|December 31, 2025
概括
像PLA/PBAT这样的可生物降解塑料可以阻碍聚乙烯 (PP) 和聚乙烯 (PS) 的回收,即使在很低的百分比. 这项研究表明,污染会降低冲击强度和硬度,影响回收质量.
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
- 回收技术的回收技术
背景情况:
- 生物降解塑料 (PLA,PHB,PBAT) 越来越多地用于包装.
- 它们融入城市废物流中对现有的回收过程构成风险.
- 用生物塑料污染消费后回收 (PCR) 流是一个越来越令人担忧的问题.
研究的目的:
- 评估可生物降解 (BIO) 塑料污染 (1-10%) 对聚烯 (PP) 和聚烯 (PS) 再循环产品的影响.
- 在未来的PP和PS回收流中模拟BIO塑料的存在.
- 了解生物聚合物添加如何影响PP和PS的物理和热特性.
主要方法:
- 用商业PLA/PBAT混合物 (BIO) 的1%,5%和10%重量%制备PP和PS混合物.
- 用于机械和热分析的试样的注塑成型.
- 拉伸强度,冲击强度,硬度,DSC和DMTA的评估.
主要成果:
- 添加BIO塑料降低了PP和PS混合物的冲击强度和硬度.
- 性能变化取决于可生物降解聚合物的数量和负载的性质.
- 随着BIO含量增加,观察到冲击强度的下降.
结论:
- 即使少量 (1-10%) 的可生物降解塑料也可能对PP和PS回收物的性能产生负面影响.
- 需要进一步的研究,包括长期负载分析.
- 这些发现对于改进机械回收技术和管理生物塑料污染有价值.
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