一项关于新和回收聚乙烯二甲 (PET) 结晶的比较研究:对物理机械性质的多尺度影响
Laurianne Viora1, Marie Combeau2, Monica Francesca Pucci3
1Mines Paris, Centre for Material Forming (CEMEF), PSL University, UMR CNRS 7635, 1 rue Claude Daunesse, CS 10207, 06904 Sophia Antipolis, France.
Polymers
|January 17, 2024
概括
再循环聚乙烯二甲 (rPET) 与原始PET (vPET) 相比,其结晶过程发生了变化,影响了微观结构和机械性能. 了解这些变化是循环包装应用的关键.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 聚乙烯二甲 (PET) 是包装中广泛使用的聚合物.
- 了解PET的修改和循环路径对于可持续应用至关重要.
- 关闭循环,例如瓶对瓶回收,需要对材料行为有深入的了解.
研究的目的:
- 为了比较原始PET (vPET) 和回收PET (rPET) 的物理化学特性,晶体组织和机械行为.
- 研究回收对PET结晶过程和微观结构的影响.
- 增强对塑造过程中PET结晶的理解,以提高循环性.
主要方法:
- 不同扫描热量计 (DSC)
- 小角度X射线散射 (SAXS) 是一种小角度的X射线散射.
- 原子力显微镜 (AFM) 的应用
- 动态机械分析 (DMA) 是一种
- 单轴拉伸测试 单轴拉伸测试 单轴拉伸测试
主要成果:
- 虽然整体结晶度保持不变,但与vPET相比,rPET在结晶过程中表现出差异,特别是球体质的尺寸和数量.
- 这项研究建议在rPET中开发一个均的微结构,使得能够进行控制良好的局部机械性质表征.
- 由于结晶而导致的微观结构差异会影响材料在形成过程中的行为.
结论:
- 回收PET会改变其结晶行为,导致微观结构的改变.
- 这些微观结构变化会影响rPET在制造过程中的机械性能和性能,例如热成型和注射拉伸吹塑 (ISBM).
- 对rPET结晶的更深入的理解对于优化其在包装循环经济模型中的使用至关重要.
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