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Article Abstract
In this paper, we report the synthesis of block and random copolymers of 2-acrylamido-2-methyl-1-propane sulfonic acid (AMPS) and methyl methacrylate (MMA), with different AMPS feed ratios. These solution-processable copolymers with strongly sulfonated acid groups resulted in membranes with tunable ion exchange (IEC) and water absorption capacities. AFM images confirmed the microphase separation of block copolymer membrane, annealed under the appropriate conditions. The resulting copolymers from the random combination of a 1:1 molar ratio of AMPS and MMA monomers are effective at enhancing the esterification conversion of acetic acid, when compared with a reaction catalyzed by PAMPS--PMMA block copolymers and the previously studied catalytic membranes. With the membrane, the esterification reaction using acetic acid achieved 85% isopropyl acetate. These results are closely correlated with the increase in IEC (2.63 mmol Hg) and the relationship between weight loss (20.3%) and swelling degree (68%) in 2-propanol.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9269333 | PMC |
| http://dx.doi.org/10.3390/polym14132595 | DOI Listing |
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