Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Certification of the Relative Molecular Mass and the Intrinsic Viscosity of SRM 2887, a Polyethylene of Narrow Molecular Mass Distribution

Published

Author(s)

J R. Maurey, William R. Blair, Carl R. Schultesiz

Abstract

The certification of a polyethylene standard reference material, SRM 2887, is described. The Mw of SRM 2887 by light scattering was determined to be 196.4x10+3 g/mol with a sample standard deviation of 6.7 x10+3 g/mol. A combined expanded uncertainty for this light scattering Mw determination, including systematic and random uncertainties, was estimated to be 13.4 x10+3 g/mol. The limiting viscosity number of SRM 2887, by solution viscosity, in 1,2 4-trichlorobenzene was determined to be 273.5 mL/g with a sample standard deviation of 3.7 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 4.0 mL/g. The bottle-to-bottle variation of the SRM was check by size exclusion chromatography (SEC) and found to be negligible.
Citation
NIST Interagency/Internal Report (NISTIR) - 6456
Report Number
6456

Keywords

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

Citation

Maurey, J. , Blair, W. and Schultesiz, C. (2021), Certification of the Relative Molecular Mass and the Intrinsic Viscosity of SRM 2887, a Polyethylene of Narrow Molecular Mass Distribution, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD (Accessed May 25, 2024)

Issues

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

Created October 12, 2021