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A novel method of extraction of blend component structure from SANS measurements of homopolymer bimodal blends.

Smerdova, O. and Graham, R.S. and Gasser, U. and Hutchings, L.R. and De Focatiis, D.S.A. (2014) 'A novel method of extraction of blend component structure from SANS measurements of homopolymer bimodal blends.', Macromolecular chemistry and physics., 215 (9). pp. 859-866.


A new method is presented for the extraction of single-chain form factors and interchain interference functions from a range of small-angle neutron scattering (SANS) experiments on bimodal homopolymer blends. The method requires a minimum of three blends, made up of hydrogenated and deuterated components with matched degree of polymerization at two different chain lengths, but with carefully varying deuteration levels. The method is validated through an experimental study on polystyrene homopolymer bimodal blends with inline image. By fitting Debye functions to the structure factors, it is shown that there is good agreement between the molar mass of the components obtained from SANS and from chromatography. The extraction method also enables, for the first time, interchain scattering functions to be produced for scattering between chains of different lengths.

Item Type:Article
Keywords:Bimodal blends, Polystyrene, Small-angle neutron scattering (SANS).
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Publisher statement:© 2014 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Date accepted:No date available
Date deposited:04 August 2014
Date of first online publication:May 2014
Date first made open access:No date available

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