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Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
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Fully Bio-Based Thermosetting Polyurethanes from Bio-Based Polyols and Isocyanates.

Roberto Morales-Cerrada1, Romain Tavernier1, Sylvain Caillol1

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Summary
This summary is machine-generated.

This study explores bio-based monomers for creating sustainable thermosetting polymers. Researchers developed novel materials from renewable resources, offering eco-friendly alternatives to traditional petroleum-based plastics.

Keywords:
allophanatebio-based polymersisocyanatesisocyanuratelysinepolyolspolyurethanes

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Sustainable Chemistry

Background:

  • Growing demand for sustainable materials drives innovation in bio-based polymer production.
  • Industry is actively seeking renewable monomers to replace petroleum-derived feedstocks.

Purpose of the Study:

  • To investigate the synthesis and characterization of thermosetting polymers using high bio-based content monomers.
  • To evaluate the performance of these novel polymers as alternatives to conventional materials.

Main Methods:

  • Utilized bio-based polyisocyanates (L-lysine ethyl ester diisocyanate, pentamethylene-diisocyanate isocyanurate trimer, hexamethylene-diisocyanate allophanate) and polyols (castor oil, polypropanediol).
  • Employed NMR, DSC, and rheology for polymerization studies.
  • Characterized cured materials using FTIR, DMA, gel content, and swelling index.

Main Results:

  • Successfully synthesized thermosetting polymers with glass transition temperatures (Tg) ranging from -41 to +21 °C.
  • Achieved thermal stabilities up to 300 °C.
  • Demonstrated the feasibility of using these bio-based monomers in direct formulations or prepolymers.

Conclusions:

  • High bio-based content thermosetting polymers can be effectively produced from readily available monomers.
  • These materials show promise as viable, sustainable alternatives to petroleum-based polymers.