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Certification of the Relative Molecular Mass and the Intrinsic Viscosity of SRM 2886, a Polyethylene of Narrow Molecular Mass Distribution

Published

Author(s)

Kathleen M. Flynn, J R. Maurey, William R. Blair

Abstract

The certification of a polyethylene standard reference material, SRM 2886, is described. The Mw of SRM 2886 by light scattering was determined to be 87.0x10+3 g/mol with a sample standard deviation of 2.4 x10+3 g/mol. A combined expanded uncertainty for this light scattering Mw determination including systematic and random uncertainties was estimated to be 6.0 x10+3 g/mol. The limiting viscosity number of SRM 2886 by solution viscosity in 1,2 4-trichlorobenzene was determined to be 154.1 mL/g with a sample standard deviation of 2.5 mL/g. The standard deviation on the mean value was 0.4 mL/g. A combined expanded uncertainty for this limiting viscosity number determination was 2.7 mL/g. The bottle-to-bottle variation of the SRM was check by size exclusion chromatography (SEC) and found to be negligible. A polydisperity index for SRM 2886 of 1.2 was estimated.
Citation
NIST Interagency/Internal Report (NISTIR) - 6487
Report Number
6487

Keywords

certification, limiting viscosity, molecular mass, narrow fraction, polydispersity index, polyethylene, standard reference material

Citation

Flynn, K. , Maurey, J. and Blair, W. (2000), Certification of the Relative Molecular Mass and the Intrinsic Viscosity of SRM 2886, a Polyethylene of Narrow Molecular Mass Distribution, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD (Accessed May 28, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created February 29, 2000, Updated October 12, 2021