Structured Interfaces for Improving the Tensile Strength and Toughness of Stiff/Highly Stretchable Polymer Hybrids,Advanced Materials Technologies

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Structured Interfaces for Improving the Tensile Strength and Toughness of Stiff/Highly Stretchable Polymer Hybrids
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2020-10-07 , DOI: 10.1002/admt.202000652
Dong Wu ₁ , Zeang Zhao _{1,

2} , Panding Wang _{1,

2} , Yongmao Pei ₁ , Haosen Chen ₂ , H. Jerry Qi ₃ , Daining Fang _{1,

2}

Affiliation

The stiff/highly stretchable polymer hybrids have a broad field of applications including robotics, electronic devices, and biomedical devices. However, poor interfacial bonding between chemically dissimilar polymers makes it difficult to achieve reliable structural performance. Building a robust interface within the polymer hybrids is one of the most important concerns. Here, the structured interface with different geometrical waveform patterns, including zigzag, buzzsaw, and strip shape is investigated for their effectiveness in improving mechanical properties of the interface. The enhancement effects of different geometries of the structured interfaces on both the tensile strength and tensile toughness are characterized by uniaxial tension tests. The finite element analysis simulations of the interface are implemented to investigate the enhancement mechanism, considering both the material nonlinearity under large deformation and the geometric nonlinearity derived from the high asymmetry in the interfacial configuration. Both the interfacial geometry and the intrinsic adhesive property of materials influence the load transfer mechanism at the interface and consequently determine the failure modes. Optimal geometrical designs of the interfacial geometries are proposed to achieve the best interfacial enhancement. The present study may provide guidance for designing the interfacial geometries in the polymer hybrids.

中文翻译：

结构化界面，用于提高刚性/高拉伸性聚合物杂化物的拉伸强度和韧性

刚性/高度可拉伸的聚合物杂化物具有广泛的应用领域，包括机器人技术，电子设备和生物医学设备。然而，化学不同的聚合物之间不良的界面结合使得难以获得可靠的结构性能。在聚合物杂化物中建立牢固的界面是最重要的问题之一。在此，研究了具有不同几何波形模式（包括曲折，锯齿和条形）的结构化界面在改善界面机械性能方面的有效性。通过单轴拉伸试验表征了结构化界面的不同几何形状对拉伸强度和拉伸韧性的增强作用。考虑到大变形下的材料非线性和界面配置中高不对称性引起的几何非线性，对界面进行了有限元分析模拟以研究增强机理。材料的界面几何形状和固有粘合性能都会影响界面处的载荷传递机制，从而确定破坏模式。提出了界面几何形状的最佳几何设计，以实现最佳的界面增强效果。本研究可为设计聚合物杂化体的界面几何结构提供指导。材料的界面几何形状和固有粘合性能都会影响界面处的载荷传递机制，从而确定破坏模式。提出了界面几何形状的最佳几何设计，以实现最佳的界面增强效果。本研究可为设计聚合物杂化体的界面几何结构提供指导。材料的界面几何形状和固有粘合性能都会影响界面处的载荷传递机制，从而确定破坏模式。提出了界面几何形状的最佳几何设计，以实现最佳的界面增强效果。本研究可为设计聚合物杂化体的界面几何结构提供指导。

更新日期：2020-11-12

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