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Visible Light-Induced Plasticity of Shape Memory Polymers.

Shaobo Ji1, Fuqiang Fan1, Chenxing Sun1

  • 1Key Laboratory of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University , Beijing 100084, China.

ACS Applied Materials & Interfaces
|September 9, 2017
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Summary

Researchers developed thermoset polyurethanes (PUs) with visible light-induced plasticity and shape memory. Higher diselenide bond content enhances both properties, enabling easier reshaping with spatial control. This offers new applications for smart polymers.

Keywords:
diselenide bondsdynamic covalent bondsphotoinduce plasticityshape memory polymersvisible light

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Organic Chemistry

Background:

  • Thermoset polymers typically require heat or UV light for plasticity.
  • Visible light, a milder trigger, has not been extensively used for polymer plasticity.
  • Introducing exchangeable bonds is a key strategy for polymer plasticity.

Purpose of the Study:

  • To fabricate thermoset polyurethanes (PUs) with visible light-induced plasticity.
  • To investigate the combined properties of plasticity and shape memory in these PUs.
  • To explore the potential of visible light as a trigger for polymer modification.

Main Methods:

  • Synthesis of thermoset polyurethanes (PUs) incorporating diselenide bonds.
  • Characterization of PUs with varying diselenide bond content.
  • Evaluation of shape memory behavior and plasticity under visible light irradiation.

Main Results:

  • Thermoset PUs with diselenide bonds exhibited visible light-induced plasticity and shape memory behavior.
  • Higher diselenide bond content correlated with enhanced shape memory and plasticity.
  • Facile reshaping of permanent shapes was achieved using visible light, demonstrating spatial control.

Conclusions:

  • Visible light can effectively induce plasticity and shape memory in diselenide-containing PUs.
  • The developed PUs offer advantages over traditional heat or UV-triggered materials due to spatial control.
  • These materials hold significant potential for advanced applications requiring precise shape manipulation.