Synthesis of Sulfonated Poly[Styrene-co-(Trimethylolpropane Triacrylate)] and Application in the Catalysis of Glycerol Acetylation

Author(s)

Godoy, William ; Castro, Giulia ; Napolis, Leonardo ; Carpegiani, Juliana ; Guimaraes, Daniela ; Aguiar, Leandro

• Document type: Journal article
• Source: MACROMOLECULAR SYMPOSIA; v. 394, n. 1, p. 7-pg., 2020-12-01.

Abstract

The purpose of this study is the synthesis of a sulfonated resin of styrene cross-linked with trimethylolpropane triacrylate (PS-TMPTA) and its application as a catalyst in glycerol acetylation. The process for obtaining the resins is an aqueous suspension copolymerization at 80 degrees C followed by a sulfonation with sulfuric acid at 57.5 degrees C. Resin characterizations are performed regarding characteristics such as ion exchange capacity and swelling index. The ion exchange capacity (IEC) found for PS-TMPTA (4.4 mmol g(-1)) is lower compared to those of commercial resins, for example, Amberlyst 36 (5.4 mmol g(-1)). Despite the low IEC (lower number of catalytic sites), PS-TMPTA presents a relatively high swelling index (2.4) and a higher turnover number (TON = 62.3 h(-1)) in comparison with the resin Amberlyst 36 (TON = 51.1 h(-1)) in glycerol acetylation at 80 degrees C with excess of acetic acid. (AU)

• FAPESP's process: 17/26985-4 - Glycerol conversion catalysed by sulfonated styrene-co-dimethacrylate: experiments and mathematical modeling
• Grantee: Leandro Gonçalves de Aguiar
• Support Opportunities: Regular Research Grants