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Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
Published on: November 30, 2020
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Copolymers Derived from Two Active Esters: Synthesis, Characterization, Thermal Properties, and Reactivity in
Thi Phuong Thu Nguyen1, Nadine Barroca-Aubry1, Caroline Aymes-Chodur1
1Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), UMR 8182, Université Paris-Saclay, CNRS, 91405 Orsay, France.
Molecules (Basel, Switzerland)
|October 27, 2022
Summary
This study synthesized novel copolymers using active esters via controlled radical polymerization, achieving high conversions and confirming compositions. The research explored the relationship between copolymer composition and thermal properties, demonstrating controlled synthesis of advanced polymer materials.
Area of Science:
- Polymer Chemistry
- Materials Science
- Organic Synthesis
Background:
- Copolymers with distinct reactive units offer pathways to materials with tailored chemical structures and properties.
- Controlled polymerization techniques are crucial for synthesizing well-defined copolymers with predictable characteristics.
Purpose of the Study:
- To synthesize copolymers incorporating two different active ester monomers: pentafluorophenyl methacrylate and p-nitrophenyl methacrylate.
- To investigate the influence of copolymer composition on thermal properties.
- To evaluate the reactivity differences between the two monomer units within the copolymer structure.
Main Methods:
- Synthesis of copolymers using Cu(0)-mediated reversible deactivation radical polymerization.
- Characterization of copolymer composition via elemental analysis, Nuclear Magnetic Resonance (NMR), Fourier-transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS).
- Thermal property analysis using Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA).
- Post-modification reactions with primary amine and primary alcohol to assess monomer reactivity.
Main Results:
- Successful synthesis of copolymers with varied compositions and high to quantitative monomer conversion.
- Moderate control over dispersity (Đ = 1.3-1.7) was achieved.
- Confirmation of coherence between expected and obtained copolymer compositions through extensive analytical techniques.
- Established correlations between copolymer composition and thermal properties (DSC, TGA).
- Demonstrated differences in reactivity between the pentafluorophenyl methacrylate and p-nitrophenyl methacrylate moieties.
Conclusions:
- Cu(0)-mediated reversible deactivation radical polymerization provides a viable method for synthesizing well-defined active ester copolymers.
- The study successfully linked copolymer composition to thermal behavior and monomer reactivity.
- The findings contribute to the development of advanced functional polymers with tunable properties.
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