利用原子力显微镜跟踪 SIS 热塑性弹性体在拉力作用下的形态和应力分布演变情况

IF 7.4 3区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Science and Technology of Advanced Materials Pub Date : 2024-12-31 DOI:10.1080/14686996.2024.2402685

Ling Gao, Haonan Liu, Xiaobin Liang, Makiko Ito, Ken Nakajima

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引用次数: 0

摘要

苯乙烯基 ABA 型三嵌段共聚物及其共混物是被广泛研究的热塑性弹性体（TPE）。要设计出具有高强度和回弹性的坚韧 TPE 材料，就必须进一步阐明拉伸样品的微观结构与宏观特性之间的关系。在此，我们应用基于原子力显微镜 (AFM) 的定量纳米力学图谱研究了聚苯乙烯-异戊二烯-苯乙烯共混物在拉伸条件下的变形行为。结果表明，在拉伸初始阶段，玻璃态聚苯乙烯（PS）畴发生变形，并形成不均匀的应力分布。当应变达到 200% 时，玻璃态 PS 结构域开始出现裂纹。拉伸过程中 JKR 杨氏模量图的峰值变化与应力-应变曲线一致。对拉伸前后颗粒的分析表明，玻璃态结构域在拉伸过程中发生了分离和重组。

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Tracking the evolution of the morphology and stress distribution of SIS thermoplastic elastomers under tension using atomic force microscopy

Styrene-based ABA-type triblock copolymers and their blends are widely investigated thermoplastic elastomers (TPEs). The design of tough TPE materials with high strength and resilience requires further clarification of the relationship between microstructure and macroscopic properties of stretched samples. Here, we applied atomic force microscopy (AFM)-based quantitative nanomechanical mapping to study the deformation behavior of poly(styrene-b-isoprene-b-styrene) blends under tension. The results indicated that the glassy polystyrene (PS) domains deformed and inhomogeneous stress distributions developed in the initial stretching stage. At 200% strain, the glassy PS domains started to crack. The change in the peak value in the JKR Young’s modulus diagram during stretching was consistent with the stress – strain curve. Analysis of the particles before and after stretching suggested that the glassy domains separated and reorganized during stretching.

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来源期刊

Science and Technology of Advanced Materials 工程技术-材料科学：综合

CiteScore

10.60

自引率

3.60%

发文量

审稿时长

4.8 months

期刊介绍： Science and Technology of Advanced Materials (STAM) is a leading open access, international journal for outstanding research articles across all aspects of materials science. Our audience is the international community across the disciplines of materials science, physics, chemistry, biology as well as engineering. The journal covers a broad spectrum of topics including functional and structural materials, synthesis and processing, theoretical analyses, characterization and properties of materials. Emphasis is placed on the interdisciplinary nature of materials science and issues at the forefront of the field, such as energy and environmental issues, as well as medical and bioengineering applications. Of particular interest are research papers on the following topics: Materials informatics and materials genomics Materials for 3D printing and additive manufacturing Nanostructured/nanoscale materials and nanodevices Bio-inspired, biomedical, and biological materials; nanomedicine, and novel technologies for clinical and medical applications Materials for energy and environment, next-generation photovoltaics, and green technologies Advanced structural materials, materials for extreme conditions.