Mechanochemical synthesis of polypropylene-based macromolecular stabilizers

A mechanochemical process is proposed as an innovative approach to the synthesis of polypropylene-based macromolecular stabilizers with outstanding thermal behavior. Properly designed butylated hydroxytoluene antioxidants (BHT) and hindered amine light stabilizers (HALS) are covalently linked to pol...

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Bibliographic Details
Published in:Reactive & functional polymers 2024-04, Vol.197, p.105858, Article 105858
Main Authors: Di Maro, Mattia, Giraldi, Domitilla, Menichetti, Stefano, Losio, Simona, Stagnaro, Paola, Utzeri, Roberto, Cerofolini, Linda, Fragai, Marco, Viglianisi, Caterina
Format: Article
Language:English
Subjects:
Macromolecular stabilizers
Mechanochemistry
Polymers
Solvent-free
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Summary:A mechanochemical process is proposed as an innovative approach to the synthesis of polypropylene-based macromolecular stabilizers with outstanding thermal behavior. Properly designed butylated hydroxytoluene antioxidants (BHT) and hindered amine light stabilizers (HALS) are covalently linked to polypropylene grafted with maleic anhydride (PP-g-MA) using a ball-mill apparatus under mild and solvent-free conditions. The study reports a quantitative evaluation of the degree of functionalization based on ATR-FTIR quantification technique and the solid-state NMR spectroscopy characterization of the ensuing materials. This strategy is a significant step towards safe and sustainable chemical synthesis in the field of macromolecular materials. The covalent linking of suitable stabilizing units to a maleic anhydride grafted polypropylene by a solvent free mechanochemical process carried out in a ball milling system. The study reports ATR-FTIR and solid-state NMR spectroscopy techniques for quantification and characterization of the ensuing materials. Institute and/or researcher Twitter usernames: @CViglianisi; @UNI_FIRENZE; @cnr_scitec. [Display omitted] •Sustainable chemical functionalization of maleic anhydride grafted polypropylene.•Quantitative evaluation of the degree of functionalization based on ATR-FTIR quantification technique.•Solid-state NMR spectroscopy characterization of the macromolecular materials.•Mechanochemical synthesis of macromolecular stabilizers under mild and solvent-free conditions.
ISSN:1381-5148
DOI:10.1016/j.reactfunctpolym.2024.105858