Conversion of Contaminated Post-Consumer Polyethylene Terephthalate into a Thermoset Alkyd Coating Using Biosourced Monomers

The synthesis of a high-performance oxidative cross-linked thermoset alkyd coating is described that utilizes a novel recycling strategy from contaminated postconsumer waste polyethylene terephthalate (wPET). A single-stage “depolymerization-repolymerization” process has been developed that allows t...

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Bibliographic Details
Published inACS sustainable chemistry & engineering Vol. 12; no. 17; pp. 6485 - 6493
Main Authors Thomas, Bradley, Lopez, Nicole D. A., Railton, James, Bousbaa, Jamal, Perry, Justin J. B., Unthank, Matthew G.
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 29.04.2024
Subjects
thermoset
coatings
alkyds
unsaturated polyester
network polymers
sustainable materials
recycling
polymers
plastic waste
PET waste
alkyd resin
sustainability
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Summary:The synthesis of a high-performance oxidative cross-linked thermoset alkyd coating is described that utilizes a novel recycling strategy from contaminated postconsumer waste polyethylene terephthalate (wPET). A single-stage “depolymerization-repolymerization” process has been developed that allows the exploitation of a waste stream from a commercial PET recycling process with 95% efficiency, which, when copolymerized with glycerol and tall oil fatty acid, delivers a sustainable fatty acid-functional polyester suitable for use in thermoset alkyd coatings. Physical drying challenges have been tackled via the development of a convergent polymer formulation strategy from a single source of wPET and the formulation of the resulting fatty acid-functional polymers with commercial alkyd driers, delivering a thermoset alkyd coating suitable for industrial applications.
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ISSN:2168-0485
2168-0485
DOI:10.1021/acssuschemeng.3c07560