High-performance polyurethane elastomers with mechano-responsive self-reinforcing via rigid-flexible segments regulation

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY Composites Part B: Engineering Pub Date : 2025-02-17 DOI:10.1016/j.compositesb.2025.112287

Huizhou Luo , Henghui Deng , Yongyin Zhu , Hebo Shi , Chaoqun Zhang , Yang Wang

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Abstract

Elastomers are widely used in daily life, high-performance elastomers are expected to possess high strength, high toughness, excellent reparability and recyclability. Here, synthesized through simple one-pot method, amorphous polyurethane elastomers with suitable ratio of rigid and flexible segments could exhibit mechano-responsive self-reinforcing effect, which was caused by the strain induced orientation of polymer chains. Surprisingly, BPU-HDI_0.4-HMDI_0.6 had 24 times and 95 times the toughness of the samples with only flexible segments (BPU-HDI) or rigid segments (BPU-HMDI), respectively. Furthermore, BPU-HDI_0.4-HMDI_0.6 exhibited high strength (49.5 MPa), excellent Young's modulus (554.6 MPa), outstanding toughness (256.5 MJ m⁻³), as well as good fracture energy (115.5 kJ m⁻²), while possessed recovery, puncture resistance, self-healing and recyclability properties. The high-performance polyurethane elastomers with mechano-responsive self-reinforcing effect obtained in this work verified the potential of achieving a balance between strength and toughness of amorphous polymers by regulating the ratio of rigid and flexible segments. The material regulation strategy presented in this work is expected to provide valuable ideas for the construction of high-performance elastomers.

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高性能聚氨酯弹性体与机械响应自我加强通过刚性-柔性段调节

弹性体在日常生活中有着广泛的应用，高性能弹性体应具有高强度、高韧性、优异的可修复性和可回收性。本文通过简单的一锅法合成了刚性段与柔性段比例合适的非晶态聚氨酯弹性体，该非晶态聚氨酯弹性体由于聚合物链的应变诱导取向而表现出机械响应性的自增强效应。令人惊讶的是，BPU-HDI0.4-HMDI0.6的韧性分别是仅含柔性段（BPU-HDI）和刚性段（BPU-HMDI）样品的24倍和95倍。此外，BPU-HDI0.4-HMDI0.6具有高强度（49.5 MPa）、优异的杨氏模量（554.6 MPa）、优异的韧性（256.5 MJ m−3）和良好的断裂能（115.5 kJ m−2），同时具有恢复、抗穿刺、自愈和可回收性能。本研究获得的具有机械响应自增强效应的高性能聚氨酯弹性体验证了通过调节刚性段和柔性段的比例来实现非晶聚合物强度和韧性平衡的潜力。本研究提出的材料调控策略有望为高性能弹性体的构建提供有价值的思路。

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产品信息

麦克林

HDI

来源期刊

Composites Part B: Engineering 工程技术-材料科学：复合

CiteScore

24.40

自引率

11.50%

发文量

784

审稿时长

21 days

期刊介绍： Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development. The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.