Upcycling Poly(vinyl chloride) and Polystyrene Plastics Using Photothermal Conversion

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

Poly(vinyl chloride) (PVC) and polystyrene (PS) are among the least recycled plastics. In this work, we developed a simple novel strategy to valorize PVC PS plastics via photothermal conversion (1-chloroethyl)benzene, commodity chemical with excellent versatility. As is known release HCl gas decompose into conjugated polyenes, envisioned dual role for While in situ-generated serves as chlorine source, resulting dehydrochlorinated-PVC (DHPVC) functions agent accelerate hydrochlorination of styrene. We converted styrene up 89% (1-chloroethyl)benzene less than 1 h white light irradiation. Subsequent nucleophilic substitution on chloro-adduct formed 1-phenylethanol (a fragrance additive) fendiline heart disease drug) high yields. The system applied various alkenes compatible post-consumer waste plasticizers. Ultimately, upcycling photothermally achieved 84% under LED h, co-upcycling 42% yield focused sunlight irradiation just 4 min.

Language: Английский

Tuning the Thermal Properties of Polymethacrylates With Bicyclobutane Monomers

Journal of Polymer Science, Journal Year: 2025, Volume and Issue: unknown

Published: April 16, 2025

ABSTRACT Developing novel yet recyclable plastics is necessary as society advances and increases reliance on materials. Using new classes of monomers enables the synthesis unprecedented polymers for applications. Here, we report copolymerization with bicyclo[1.1.0]butane to make strained backbone units analyze thermal property changes based % incorporation monomers. We discover that even low (5%–20%) methyl bicyclobutane‐1‐carboxylate (MBC) poly(methyl methacrylate) (PMMA) degradation temperature while decreasing glass transition temperature. Efficient depolymerization achieved copolymers 20% or fewer MBC under photothermal conversion. Other comonomers (2‐methoxyethyl methacrylate oligo(ethylene glycol) monomethyl ethyl are also copolymerized MBC, assess in their properties, including lower critical solution temperatures (LCSTs). Our work expands understanding how monomer plays a role copolymerization, characteristics, copolymers.

Language: Английский

Co-recycling of plastics and other waste materials

Published: April 28, 2025

Language: Английский