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The objective of this paper is to critically evaluate the performance of the newly introduced Millipore Waters GPCviscometer system. In particular, the capabilities of the data analysis methodology are evaluated and limitations are identified. methodology and to make it more user friendly are suggested.

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SynopsisThe application of low-angle laser light scattering (LALLS) and combined GPC/LALLS for the measurement of absolute molecular weight distribution of a styrene-butylacrylate (30/70) emulsion copolymer is discussed. From the static light scattering measurements in four different solvents, i.e., toluene, tetrahydrofuran (THF), methyl ethyl ketone (MEK), and dimethylformamide (DMF), the true weight average molecular weight (mu) and heterogeneity parameters are determined. The apparent mu obtained from the static measurement in THF was in good agreement with the mu, determined from the multiple solvent analysis, suggesting the validity of using THF as the mobile phase in the combined GPC/LALLS analysis.

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