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Andrea Carletto1, Jas Pal S Badyal1

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Physical Chemistry Chemical Physics : PCCP
|July 20, 2019
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This study explores glycidyl methacrylate pulsed plasmas, revealing that low duty cycles initiate polymerization during short electrical pulses. This method enables efficient, chemical-free synthesis of poly(glycidyl methacrylate) thin films at ambient temperatures.

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Area of Science:

  • Polymer Chemistry
  • Plasma Science
  • Materials Science

Background:

  • Pulsed plasma techniques offer controlled environments for chemical synthesis.
  • Glycidyl methacrylate (GMA) is a versatile monomer for functional polymer synthesis.
  • Conventional polymerization methods often require catalysts, solvents, and elevated temperatures.

Purpose of the Study:

  • To investigate the mechanism of poly(glycidyl methacrylate) synthesis using pulsed plasma.
  • To explore the potential of low duty cycle pulsed plasmas for controlled polymer film deposition.
  • To evaluate the efficiency and sustainability of this plasma-chemical approach.

Main Methods:

  • Time-resolved in situ mass spectrometry was employed to analyze plasma species.
  • Glycidyl methacrylate (GMA) monomer was subjected to pulsed plasma conditions.
  • Investigation focused on short electrical discharge pulses (microseconds) and extended off-periods (milliseconds).

Main Results:

  • Monomer fragmentation and formation of polymerization initiator species were observed during plasma pulses.
  • Step-wise monomer addition polymerization occurred during the off-periods, leading to polymer chain growth.
  • Well-defined poly(glycidyl methacrylate) chains were successfully synthesized.

Conclusions:

  • Low duty cycle pulsed plasmas enable selective synthesis of poly(glycidyl methacrylate).
  • The process is highly efficient, requiring no additional chemicals, low power (mW), and ambient temperatures.
  • This approach represents a sustainable and effective method for functional thin film synthesis.