Durable, Super-Resilient, and Ultra-Strong Polyurethane Elastomers Via a Dense Hydrogen Bond Cross-Linking Strategy

IF 5.1 1区化学 Q1 POLYMER SCIENCE

Macromolecules Pub Date : 2025-03-12 DOI:10.1021/acs.macromol.4c0324910.1021/acs.macromol.4c03249

Chong Tian, Fuqi Zhao, Na Yang, Yunfeng Jiang, Lei Huang, Feng Zhou, Dandan Yuan and Xufu Cai*,

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引用次数: 0

Abstract

Reinforced and toughened elastomers are widely used in the automotive industry, medical health, flexible electronics, and other fields. However, most of the reported elastomers cannot maintain or return to their initial excellent properties in time after suffering large deformation with obvious residual strain, and the performance will be greatly reduced after prolonged use. Here, we report a thermoplastic polyurethane elastomer (PU-OD) cross-linked solely by high-density hydrogen bonds, which exhibits high tensile strength (98.5 MPa), ultrahigh elastic resilience (a small residual strain of 50% after recovering at 600% elongation), ultrahigh transparency (greater than 98%), healing (healing efficiency greater than 97%), and high durability (including UV resistance, thermal oxidation resistance, and solvent resistance). The elasticity of PU-OD elastomers exhibits historical maximums among previously reported thermoplastic elastomers due to the fact that the molecular chains of PU-OD contain a smaller number of sacrificial bonds to each other relative to typical thermoplastic elastomers. Moreover, PU-OD also exhibits excellent light transmission and durability after thermal oxidation aging due to its molecular structure which does not contain aromatic groups, and it shows excellent compatibility between soft and hard segments. The design strategy of PU-OD elastomer provides an important idea for the preparation of practical and high-performance elastomers with super durability, high resilience, high strength, and ultrahigh transparency.

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来源期刊

Macromolecules 工程技术-高分子科学

CiteScore

9.30

自引率

16.40%

发文量

942

审稿时长

2 months

期刊介绍： Macromolecules publishes original, fundamental, and impactful research on all aspects of polymer science. Topics of interest include synthesis (e.g., controlled polymerizations, polymerization catalysis, post polymerization modification, new monomer structures and polymer architectures, and polymerization mechanisms/kinetics analysis); phase behavior, thermodynamics, dynamic, and ordering/disordering phenomena (e.g., self-assembly, gelation, crystallization, solution/melt/solid-state characteristics); structure and properties (e.g., mechanical and rheological properties, surface/interfacial characteristics, electronic and transport properties); new state of the art characterization (e.g., spectroscopy, scattering, microscopy, rheology), simulation (e.g., Monte Carlo, molecular dynamics, multi-scale/coarse-grained modeling), and theoretical methods. Renewable/sustainable polymers, polymer networks, responsive polymers, electro-, magneto- and opto-active macromolecules, inorganic polymers, charge-transporting polymers (ion-containing, semiconducting, and conducting), nanostructured polymers, and polymer composites are also of interest. Typical papers published in Macromolecules showcase important and innovative concepts, experimental methods/observations, and theoretical/computational approaches that demonstrate a fundamental advance in the understanding of polymers.