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Types of Step-Growth Polymers: Polyesters01:20

Types of Step-Growth Polymers: Polyesters

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The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
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基于聚烯的3D打印结构与聚乙烯四甲糖含有机械互锁.

Erik L S Antonio1, Olga Kuksenok1, Igor Luzinov1

  • 1Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States.

ACS applied materials & interfaces
|March 8, 2025
PubMed
概括

在聚烯 (PP) 丝中添加少量聚乙烯二甲酸甘醇 (PETG),可显著提高3D打印部件的强度. 这种混合材料提高了像这样的机械性能.

科学领域:

  • 材料科学与工程 材料科学与工程
  • 增材制造 增材制造 增材制造
  • 聚合物科学 聚合物科学

背景情况:

  • 聚烯 (PP) 广泛用于用于3D打印的化丝制造 (FFF).
  • 提高PP3D打印机的机械性能和结构完整性仍然是一个关键的挑战.
  • 混合材料通过定制的复合结构提供了一条改善聚合物性能的途径.

研究的目的:

  • 调查将聚乙烯二甲酸甘醇 (PETG) 纳入PP光纤中对3D打印零件的机械和结构特征的影响.
  • 了解混合纤维中PP和PETG之间的接口增强粘附的机制.
  • 确定PETG的最佳度,以最大限度地改善3D打印PP结构.

主要方法:

  • 通过融挤出制造具有不同度PETG (0.7,1.4,2.1,3.5体积%) 的混合PP/PETG丝.
  • 使用化丝制造 (FFF) 测试结构的3D打印.
  • 使用像X射线光电子谱 (XPS) 这样的技术,对机械性质 (斯模量,收益应力),热过渡和表面组成进行表征.

主要成果:

  • 与纯 PP 相比,混合 PP/PETG 纤维丝显著改善了机械性能.
  • 加入0.7%的PETG使Young的模量增加了80%,产量压力增加了50%.
关键词:
通过3D打印打印3D打印.在PETG中使用PETG.化丝制造工艺 化丝制造工艺机械互锁的机械互锁.机械性能 机械性能 机械性能聚烯聚烯的使用方法

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  • 通过宏分子互扩散和相互锁定机制,PETG含量增强了层对层的粘附性,在较低的PETG度下具有最佳性能.

    • 结论:

    • 混合PP/PETG纤维有效提高3D打印零件的机械性能.
    • 该研究展示了一种可行的方法,通过受控材料杂交来改善PP3D打印.
    • 在较低的PETG度下,优化界面 anchoring导致了卓越的机械增强.