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Microfluidic Fabrication of Polymeric and Biohybrid Fibers with Predesigned Size and Shape
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Room-Temperature Solid-State UV Cross-Linkable Vitrimer-like Polymers for Additive Manufacturing.

Jian Chen1, Ya Wen1, Lingyi Zeng1

  • 1College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, China.

Polymers
|June 10, 2022
PubMed
Summary
This summary is machine-generated.

This study introduces a novel UV cross-linkable polymer with vitrimer-like properties. This material offers tunable mechanical properties and shape memory effects, enabling advanced additive manufacturing applications.

Keywords:
additive manufacturingcross-linkingshape memory effectvitrimer

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Additive Manufacturing

Background:

  • Vitrimer-like polymers exhibit dynamic covalent networks, offering recyclability and reprocessing capabilities.
  • UV cross-linking provides a rapid and efficient method for polymer network formation.
  • Additive manufacturing requires materials with tunable properties and robust performance.

Purpose of the Study:

  • To synthesize and characterize a UV cross-linkable vitrimer-like polymer.
  • To investigate the influence of UV cross-linking on material properties.
  • To explore the potential of this polymer in additive manufacturing.

Main Methods:

  • Synthesis of ureidopyrimidinone functionalized telechelic polybutadiene (UPy-HTPB-UPy).
  • UV cross-linking using 365 nm UV light and a photo-initiator (DMPA).
  • Mechanical property testing and shape memory effect evaluation.

Main Results:

  • The synthesized UPy-HTPB-UPy exhibits vitrimer-like behavior due to quadruple hydrogen bonding.
  • UV cross-linking density and mechanical properties are tunable by adjusting photo-initiator concentration and UV exposure time.
  • The cross-linked polymer demonstrates a good shape memory effect and enhanced strength for additive manufacturing.

Conclusions:

  • A novel UV cross-linkable vitrimer-like polymer was successfully developed.
  • The material's properties can be precisely controlled through UV cross-linking parameters.
  • This polymer holds significant potential for advanced additive manufacturing techniques like FDM and DIW.