Determination of Molecular Weight and Distribution of Polycarboxylate Superplasticizer by Triple Detection GPC

Zi Chen Lu; Zi Ming Wang; Fang Lu; Hui Qun Li

doi:10.4028/www.scientific.net/AMR.687.461

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 687Determination of Molecular Weight and Distribution...

Determination of Molecular Weight and Distribution of Polycarboxylate Superplasticizer by Triple Detection GPC

Abstract:

The molecular weight and molecular weight distribution (MWD) of polycarboxylate superplasticizer (PCE) was measured by gel permeation chromatograph (GPC) which combined three different detectors, namely refractive index detector (RI), laser light scattering detector (LS) and viscosity detector (VIS). By conducting numerous experiments, what the different peak stand for in the chromatogram was verified and the best sample concentration range in the GPC experiment was also determined. Besides, based on the analysis to the RI chromatogram, the theory on using peak area ratio to denote concentration ratio was put forward. What’s more, the calculation of macromonomer reaction ratio using the peak area in the RI chromatogram was introduced.

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Periodical:

Advanced Materials Research (Volume 687)

Pages:

461-465

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.687.461

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Online since:

April 2013

Authors:

Zi Chen Lu, Zi Ming Wang, Fang Lu, Hui Qun Li

Keywords:

Chromatogram, GPC, Polycarboxylate Superplasticizer (PCE)

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