期刊
MACROMOLECULAR RAPID COMMUNICATIONS
卷 42, 期 24, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.202100509
关键词
elastomers; interfacial interactions; sacrificial networks; strength; toughness
资金
- Scientific Research Foundation of Hainan University [KYQD(ZR)1988]
- Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology), Ministry of Education [CFFP202103]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDC06010100]
This study introduces a novel, easy strategy to construct sacrificial networks driven by interfacial interactions, which improves the strength and toughness of materials.
Strength and toughness are usually mutually exclusive for materials. The sacrificial bond strategy is used to address the trade-off between strength and toughness. However, the complex construction process of sacrificial network limits the application of sacrificial network. This work develops a facile strategy to construct an interfacial interactions-driven sacrificial network. The authors' group finds that there are the interfacial interactions between arginines (A) aggregates and molecular chains. Such interfacial interactions result in the mechanical properties of samples having a strong dependence on extension rates, which shows that A aggregates construct a network structure by interfacial interactions. The interfacial interactions between A aggregates and chains improve the strength of samples; while the A aggregate network driven by interfacial interactions preferentially ruptures to dissipate large energy for the improvement of fracture toughness, which can be considered as a sacrificial network. Therefore, their designed elastomers have both high strength and high toughness. This work provides an easier strategy for the construction of sacrificial networks, which can promote the industrial application of sacrificial networks in elastomer materials.
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