Characterization of molecular weight of poly(methyl methacrylate) by dynamic light scattering


In this work, the dynamic light scattering technique was applied to characterize the molecular weight of poly(methyl methacrylate). Three solutions of poly(methyl methacrylate) in ethyl acetate, with respective polymer concentrations of 1 %, 0.75 % and 0.50 %, filtered in membranes of 0.45 μm and 0.22 μm and without filtration were analyzed. The results for the solutions with concentrations of 0.75 % and 0.50 % were above than the polymer’s specification value obtained by gel permeation chromatography. The result closest to the specification value, 120,000 Da, was for the sample with concentration of 0.50 % filtered in membrane of 0.45 μm, with average molecular weight around 140,000 Da.

PAIVA, Lucilene Betega de; ALEXANDRE, Fabiana Oliveira; DINIS, Aline Cotta. Caracterização da massa molecular de poli (metacrilato de metila) por espalhamento dinâmico de luz. In: CONGRESSO BRASILEIRO DE POLÍMEROS, 15., 2019, Bento Gonçalves, RS. Anais… 5p.

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