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Related Concept Videos

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Elasticity

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Elasticity is the ability of an object to withstand the effects of distortion and to return to its original size and shape once the forces causing deformation are removed. When an elastic material deforms under the action of an external force, it experiences internal resistance to the deformation. However, if no external force is applied, it returns to its original state.
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A phase diagram combines plots of pressure versus temperature for the liquid-gas, solid-liquid, and solid-gas phase-transition equilibria of a substance. These diagrams indicate the physical states that exist under specific conditions of pressure and temperature and also provide the pressure dependence of the phase-transition temperatures (melting points, sublimation points, boiling points). Regions or areas labeled solid, liquid, and gas represent single phases, while lines or curves represent...
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Upon subjecting concrete to moderate or high uniaxial compressive or tensile stresses, the strain response is non-linear relative to the stress applied. As the stress is removed, the resulting stress-strain curve deviates from the original path traced during loading, creating a hysteresis loop, indicative of the concrete's non-linear and non-elastic properties. Typically, a material's modulus of elasticity, which is a measure of the material's stiffness, is inferred from the linear...
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Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
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Elastic Potential Energy01:01

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Elastic potential energy is the energy stored as a result of the deformation of an elastic object, such as the stretching of a spring. An object is elastic if it returns to its original shape and size after being deformed. 
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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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Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites
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Phase Separation-Driven Concurrent High Elasticity and Reextrudability for Biobased Elastomers.

Yeqing Li1, Shuangjian Yu1, Huawei Qiao1

  • 1Institute of Emergent Elastomers, Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China.

ACS Applied Materials & Interfaces
|February 6, 2026
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Summary
This summary is machine-generated.

This study introduces recyclable biobased thermoplastic elastomers by combining dynamic covalent cross-linking and phase separation. The novel materials offer excellent elasticity and recyclability, addressing key challenges in sustainable polymer development.

Keywords:
biobased elastomersdynamic covalent bondsextrudabilityhigh elasticityphase separation

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Sustainable Materials

Background:

  • Thermosetting polymers present recycling challenges, while petroleum-based polymers contribute to environmental burden.
  • Existing biobased elastomers face a trade-off between elasticity and recyclability due to cross-linking density.
  • Need for high-performance, recyclable, and biobased elastomers is critical for sustainability.

Purpose of the Study:

  • To develop a novel method for synthesizing recyclable biobased thermoplastic elastomers.
  • To overcome the elasticity-recyclability trade-off in cross-linked biobased elastomers.
  • To create a scalable route for sustainable elastomer production.

Main Methods:

  • Integration of phase separation modulation with dynamic covalent cross-linking.
  • One-step in situ polymerization of biobased monomers (epoxidized soybean oil and dimer acid) within an EPDM matrix using M-g-EVA as a compatibilizer.
  • Formation of a stable multiphase network ('continuous - interfacial - dispersed phase') through controlled polymerization and cross-linking.

Main Results:

  • The synthesized biobased thermoplastic elastomers exhibit enhanced elastic performance, including excellent creep resistance and improved low-temperature compression set.
  • Materials demonstrate outstanding cyclic fatigue stability with over 97% stress retention after 300 cycles.
  • The polymer network allows for continuous extrusion and reprocessing, retaining over 85% of mechanical properties after five cycles due to dynamic covalent bonds and EPDM lubrication.

Conclusions:

  • A scalable and effective method for producing high-performance, recyclable biobased thermoplastic elastomers has been established.
  • The study provides valuable design insights for developing next-generation sustainable elastomers.
  • The developed materials offer a promising alternative to petroleum-based polymers, addressing environmental concerns and performance requirements.