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Comparison of methods for the determination of diffusion coefficients of polymers in dilute solutions: The influence of polydispersity
Journal of polymer science. Part B, Polymer physics, 1999-03, Vol.37 (6), p.593-603
Mes, E. P. C.
Kok, W. Th
Poppe, H.
Tijssen, R.
1999
Volltextzugriff (PDF)
Details
Autor(en) / Beteiligte
Mes, E. P. C.
Kok, W. Th
Poppe, H.
Tijssen, R.
Titel
Comparison of methods for the determination of diffusion coefficients of polymers in dilute solutions: The influence of polydispersity
Ist Teil von
Journal of polymer science. Part B, Polymer physics, 1999-03, Vol.37 (6), p.593-603
Ort / Verlag
New York: John Wiley & Sons, Inc
Erscheinungsjahr
1999
Quelle
Wiley Online Library
Beschreibungen/Notizen
A comparison between various methods to determine diffusion coefficients of polymers in dilute solutions has been made. It is shown that Taylor dispersion analysis (TDA), dynamic light scattering (DLS), hydrodynamic chromatography (HDC), and size exclusion chromatography (SEC) can all be used to accurately determine diffusion coefficients when the polymer samples have low polydispersities. By the analysis of a series of practically representative styrene acrylonitrile copolymer (SAN) samples, it is shown that polydispersity of the samples and the presence of low‐molecular‐mass material cause considerable differences between the methods. It was found that TDA is mostly disturbed by the presence of low‐molecular‐mass material, whereas DLS is more sensitive to the polydispersity of the polymer. With broad samples, DLS gives the Z‐average diffusion coefficient. SEC can be used to obtain a diffusion coefficient distribution as well as an average diffusion coefficient of a polydisperse sample. Although, the same was expected for HDC, it was found that this method could only be successfully used for polymer samples having low polydispersities. Deviations between SEC, HDC, and TDA found for narrow samples were not related to the chemical composition of the samples. © 1999 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 37: 593–603, 1999
Sprache
Englisch
Identifikatoren
ISSN: 0887-6266
eISSN: 1099-0488
DOI: 10.1002/(SICI)1099-0488(19990315)37:6<593::AID-POLB11>3.0.CO;2-N
Titel-ID: cdi_crossref_primary_10_1002__SICI_1099_0488_19990315_37_6_593__AID_POLB11_3_0_CO_2_N
Format
–
Schlagworte
Applied sciences
,
diffusion coefficient
,
dynamic light scattering
,
Exact sciences and technology
,
hydrodynamic chromatography
,
Organic polymers
,
Physicochemistry of polymers
,
polydispersity
,
Properties and characterization
,
size exclusion chromatography
,
Solution and gel properties
,
styrene acrylonitrile copolymers
,
Taylor dispersion analysis
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