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Related Concept Videos

Residual Stresses in Bending01:18

Residual Stresses in Bending

In the study of elastoplastic members subjected to bending moments, understanding the loading and unloading phases is crucial for assessing material behavior and structural integrity. During the loading phase, as the bending moment increases, the material initially responds elastically, adhering to Hooke's Law, where stress is directly proportional to strain. When the load exceeds the yield strength, plastic deformation occurs, resulting in permanent strain and deformation that remains even...
Members Made of Elastoplastic Material01:19

Members Made of Elastoplastic Material

The behavior of elastoplastic materials under bending stresses, particularly in structural members with rectangular cross-sections, is crucial for predicting material responses and understanding failure modes. Initially, when a bending moment is applied, the stress distribution across the section follows Hooke's Law and is linear and elastic. This distribution means the stress increases from the neutral axis to the maximum at the outer fibers, up to the elastic limit.
As the bending moment...
Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity01:15

Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity

Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
Dynamic Modulus of Elasticity of Concrete01:16

Dynamic Modulus of Elasticity of Concrete

The dynamic modulus of elasticity assesses how a concrete structure deforms under impact or dynamic loads. It is typically higher than the static modulus of elasticity, measured under slow, steady loading conditions.
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by a...
Bending of Members Made of Several Materials01:11

Bending of Members Made of Several Materials

In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each material's...
Strain and Elastic Modulus01:15

Strain and Elastic Modulus

The quantity that describes the deformation of a body under stress is known as strain. Strain is given as a fractional change in either length, volume, or geometry under tensile, volume (also known as bulk), or shear stress, respectively, and is a dimensionless quantity. The strain experienced by a body under tensile or compressive stress is called tensile or compressive strain, respectively. In contrast, the strain experienced under bulk stress and shear stress is known as volume and shear...

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Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
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Resolving the Strength-Modulus-Elasticity Tradeoff in Elastomers Using Dual Phase-Separated Nanodomains.

Xiang Wei1, Tianqi Li1, Yixuan Li1

  • 1State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|July 13, 2026
PubMed
Summary

Researchers developed advanced elastomers by creating dual nanodomains, overcoming the conflict between strength and elasticity. These high-performance materials offer exceptional mechanical properties and elastic recovery for demanding applications.

Keywords:
high elasticityhigh‐strength and high‐modulus elastomersrecyclable polymersreversibly cross‐linked elastomers

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Achieving elastomers with simultaneous ultrahigh strength, high modulus, and excellent elasticity is a significant challenge due to conflicting material properties.
  • Conventional elastomers often face trade-offs, limiting their performance in high-stress applications.

Purpose of the Study:

  • To develop a novel strategy for creating elastomers that overcome the intrinsic trade-offs between strength, modulus, and elasticity.
  • To engineer materials with enhanced mechanical robustness and elastic recovery through a dual nanodomain approach.

Main Methods:

  • Fabrication of elastomers via copolymerization of rigid aromatic polyurea segments and flexible poly(urethane-urea) chains with acylsemicarbazide moieties.
  • Utilizing a dual phase-separated nanodomain strategy to create spatially confined reinforcing nanodomains.
  • Characterization using small-angle X-ray scattering and electron microscopy to analyze nanodomain structures.

Main Results:

  • The developed elastomers exhibit an exceptional combination of tensile strength (104.6 MPa), Young's modulus (43.1 MPa), and toughness (350 MJ m⁻³).
  • Materials demonstrated full elastic recovery after 600% strain, attributed to synergistic reinforcement from two distinct nanodomains.
  • Composites using these elastomers as binders for carbon-fiber fabrics achieved record-high fracture energies (up to 2059 kJ m⁻²).

Conclusions:

  • The dual nanodomain strategy effectively resolves the strength-modulus-elasticity trade-off in elastomers.
  • These high-performance elastomers offer superior mechanical properties, stability, healability, and reprocessability.
  • The findings present a novel pathway for designing advanced elastomers for demanding applications, including high-performance composites.