Polyvinylpolypyrrolidone Supported Brønsted Acidic Catalyst for Esterification

<div>FESEM photographs of (a) PVPP, (b) PVPP-BS, and (c) <svg height="11.439pt" id="M80" style="vertical-align:-2.15067pt" version="1.1" viewbox="-0.0498162 -9.28833 4.60146 11.439" width="4.60146pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M290 -163V-135C183 -126 181 -122 181 -44V583C181 662 184 666 290 675V703H120V-163H290Z" id="g113-92"></path><glyph.data ascent="3473" descent="-2876" horiz-adv-x="345" vert-adv-y="345"></glyph.data></g></svg>PVPP-BS<svg height="11.439pt" id="M81" style="vertical-align:-2.15067pt" version="1.1" viewbox="-0.0498162 -9.28833 4.60146 11.439" width="4.60146pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M226 -163V703H56V676C162 667 165 662 165 584V-43C165 -122 162 -126 56 -136V-163H226Z" id="g113-94"></path><glyph.data ascent="3473" descent="-2876" horiz-adv-x="345" vert-adv-y="345"></glyph.data></g></svg>HSO<sub>4</sub>.</div>

International Journal of Polymer Science

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Figure 4

Figure 4: Polyvinylpolypyrrolidone Supported Brønsted Acidic Catalyst for Esterification 