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Visualization of Atom Transfer Radical Polymerization by Aggregation-Induced Emission Technology.

Xin Wang1, Xiaoguang Qiao1, Xiuzhe Yin1

  • 1Henan Joint International Research Laboratory of Living Polymerizations and Functional Nanomaterials, Henan Key Laboratory of Advanced Nylon Materials and Application, School of Materials Science and Engineering, Zhengzhou University, No.100 of Kexue Avenue, Zhengzhou, 450001, China.

Chemistry, an Asian Journal
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Summary

Aggregation-induced emission (AIE) technology enables real-time monitoring of atom transfer radical polymerization (ATRP). This method uses tertraphenyl ethylene (TPE) initiators, showing sensitive photoluminescent changes with polymer growth.

Keywords:
ATRPAggregation-induced emissioncontrolled radical polymerizationin-situ monitoringvisualization

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Spectroscopy

Background:

  • Atom transfer radical polymerization (ATRP) is a controlled polymerization technique.
  • In-situ monitoring of polymerization processes is crucial for understanding reaction kinetics and controlling polymer properties.
  • Aggregation-induced emission (AIE) materials offer unique photoluminescent properties sensitive to environmental changes.

Purpose of the Study:

  • To develop and demonstrate an AIE-based method for real-time monitoring of ATRP.
  • To investigate the use of tertraphenyl ethylene (TPE)-containing compounds as ATRP initiators for optical sensing.
  • To establish a correlation between photoluminescence (PL) intensity and polymer molecular weight during ATRP.

Main Methods:

  • Synthesis of tertraphenyl ethylene (TPE)-containing α-bromo compounds as ATRP initiators.
  • Application of these initiators in ATRP of various monomers.
  • Monitoring of photoluminescent (PL) emission changes during polymerization.
  • Correlation analysis between PL intensity and polymer molecular weight (Mn).

Main Results:

  • TPE-containing initiators successfully initiated ATRP.
  • The PL emission of the polymerization system exhibited sensitivity to local viscosity changes due to AIE characteristics of TPE.
  • Linear relationships were observed between polymer molecular weight (Mn) and PL intensity across different monomer systems.
  • Chemically bonded TPE groups demonstrated higher sensitivity and accuracy compared to physical blending.

Conclusions:

  • AIE technology provides a facile and effective approach for in-situ monitoring of ATRP.
  • The developed optical research platform based on AIE and ATRP offers a sensitive and accurate method for real-time polymerization analysis.
  • This work highlights the potential of integrating AIE with controlled living radical polymerization techniques.