PolyPEGA with predetermined molecular weights from enzyme-mediated radical polymerization in water

Area of Science:

• Polymer Chemistry
• Biocatalysis

Background:

• Controlled radical polymerization techniques are crucial for designing polymers with specific properties.
• Metalloenzymes offer a sustainable and efficient alternative to traditional catalysts in chemical synthesis.

Purpose of the Study:

• To report a novel method for synthesizing acrylic polymers with predetermined molecular weights.
• To investigate the use of metalloenzymes as catalysts in polymerization reactions.
• To elucidate the polymerization mechanism and its relation to existing controlled polymerization processes.

Main Methods:

• Utilizing metalloenzymes as catalysts for polymerization.
• Employing ascorbic acid as a reducing agent.
• Using alkyl halides as initiators for acrylic polymer synthesis.

Main Results:

• Successful preparation of acrylic polymers with controlled molecular weights.
• Demonstration of metalloenzymes' efficacy in catalyzing polymerization.
• Observation that the polymerization mechanism resembles Atom Transfer Radical Polymerization (ATRP), specifically the Activation-Recombination by Exchange of Radicals Generated by Electron Transfer (ARGET ATRP) process.

Conclusions:

• Metalloenzymes can be effectively used to synthesize acrylic polymers with predetermined molecular weights.
• The polymerization process follows a mechanism analogous to ARGET ATRP.
• This study introduces a biocatalytic route for controlled polymer synthesis, offering a greener alternative.