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Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
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Mechanically Robust Elastomers Enabled by a Facile Interfacial Interactions-Driven Sacrificial Network.

Wei-Wei Yu1, Wen-Zhe Xu1, Yan-Chan Wei1

  • 1Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education, Natural Rubber Cooperative Innovation Center of Hainan Province and Ministry of Education of PRC, School of Materials Science and Engineering, Hainan University, Haikou, 570228, China.

Macromolecular Rapid Communications
|September 25, 2021
PubMed
Summary
This summary is machine-generated.

Researchers developed a facile strategy for creating sacrificial networks in elastomers. This method enhances both material strength and toughness by utilizing interfacial interactions between arginine aggregates and molecular chains.

Keywords:
elastomersinterfacial interactionssacrificial networksstrengthtoughness

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Achieving high strength and toughness simultaneously in materials is a significant challenge.
  • The sacrificial bond strategy offers a solution to the strength-toughness trade-off, but its complex network construction limits practical applications.
  • Developing simpler methods for creating sacrificial networks is crucial for advancing elastomer materials.

Purpose of the Study:

  • To develop a facile strategy for constructing an interfacial interactions-driven sacrificial network in elastomers.
  • To investigate the role of interfacial interactions between arginine aggregates and molecular chains in determining mechanical properties.
  • To design elastomer materials exhibiting both high strength and high fracture toughness.

Main Methods:

  • Fabrication of elastomer samples incorporating arginine aggregates.
  • Mechanical testing of elastomers, including tensile tests at varying extension rates.
  • Analysis of interfacial interactions between arginine aggregates and polymer chains.
  • Characterization of the sacrificial network mechanism through material failure analysis.

Main Results:

  • Discovered significant interfacial interactions between arginine aggregates and molecular chains.
  • Demonstrated that these interactions lead to a strong dependence of mechanical properties on extension rates.
  • Observed that arginine aggregates form a network structure driven by interfacial interactions.
  • Showcased that the designed elastomers possess both high strength and high fracture toughness due to the sacrificial network mechanism.

Conclusions:

  • A facile strategy for constructing sacrificial networks based on interfacial interactions has been successfully developed.
  • The interfacial interactions between arginine aggregates and molecular chains effectively enhance both strength and toughness in elastomers.
  • This approach simplifies the creation of sacrificial networks, paving the way for broader industrial applications in advanced elastomer materials.