Abstract
A novel self-oscillating copolymer was prepared by utilizing Fe(phen)3 as the catalyst of the Belousov–Zhabotinsky (BZ) reaction. In this study, 2-acrylamido-2-methylpropane sulfonic acid (AMPS) was newly introduced into the copolymer of N-isopropylacrylamide (NIPAAm) and Fe(phen)3 as the H+providing agent for the BZ reaction. The results indicated that the copolymer solution underwent soluble–insoluble self-oscillation only in malonic acid (MA) and potassium bromate(KBrO3) mixture solution, and the amplitudes were much bigger than those of poly(NIPAAm-co-Fe(phen)3). That is to say, the novel copolymer succeeds in self-oscillating under acid-free conditions. Moreover, the oscillating characteristics were closely related to the content of AMPS in the copolymer.
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