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Synthesis of Sulfonated Poly[Styrene‐co‐(Trimethylolpropane Triacrylate)] and Application in the Catalysis of Glycerol Acetylation
Author(s) -
Godoy William,
Castro Giulia,
Nápolis Leonardo,
Carpegiani Juliana,
Guimarães Daniela,
Aguiar Leandro
Publication year - 2020
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201900169
Subject(s) - tmpta , trimethylolpropane , styrene , ion exchange resin , catalysis , glycerol , polymer chemistry , chemistry , sulfuric acid , copolymer , acetic acid , swelling , ion exchange , acetone , nuclear chemistry , organic chemistry , materials science , ion , polymer , composite material , acrylate , polyurethane
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°C followed by a sulfonation with sulfuric acid at 57.5°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°C with excess of acetic acid.