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

Smerdova, Olga and Graham, Richard Stuart and Gasser, Urs and Hutchings, Lian R. and De Focatiis, Davide S.A. (2014) A novel nethod of extraction of blend component structure from SANS measurements of homopolymer bimodal blends. Macromolecular Chemistry and Physics, 215 (9). pp. 859-866. ISSN 1521-3935

[img]
Preview
PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Available under Licence Creative Commons Attribution.
Download (1MB) | Preview

Abstract

A new method is presented for the extraction of single chain form factors and inter-chain 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 MA ≈ ½ MB By fitting Debye functions to the structure factors it was shown that there is good agreement between the molar mass of components obtained from SANS and from chromatography. The extraction method also enables, for the first time, to produce inter-chain scattering functions for scattering between chains of different lengths.

Item Type: Article
Keywords: bimodal blends; polystyrene; small-angle neutron scattering (SANS)
Schools/Departments: University of Nottingham, UK > Faculty of Engineering > Department of Mechanical, Materials and Manufacturing Engineering
Identification Number: 10.1002/macp.201300787
Depositing User: De Focatiis, Dr Davide S A
Date Deposited: 05 Sep 2017 08:42
Last Modified: 18 Oct 2017 17:17
URI: http://eprints.nottingham.ac.uk/id/eprint/45408

Actions (Archive Staff Only)

Edit View Edit View