Observation of single-chain scattering from homopolymer blended with a triblock copolymer

A small‐angle neutron scattering method has been developed to determine the chain conformation of homopolymer chains dispersed in a block copolymer matrix. Two contrast matching techniques are used to achieve this result and are demonstrated for a system based on a styrene‐hydrogenated butadiene‐sty...

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Bibliographic Details
Published in:Journal of polymer science. Part B, Polymer physics Polymer physics, 1987-03, Vol.25 (3), p.641-650
Main Authors: Quan, X., Gancarz, I., Koberstein, J. T., Wignall, G. D.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Structure, morphology and analysis
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Summary:A small‐angle neutron scattering method has been developed to determine the chain conformation of homopolymer chains dispersed in a block copolymer matrix. Two contrast matching techniques are used to achieve this result and are demonstrated for a system based on a styrene‐hydrogenated butadiene‐styrene triblock copolymer and a hydrogenated butadiene homo‐polymer. Composition matching uses a blend of labeled and unlabeled molecules to match the scattering density of another component. Phase matching requires a block copolymer which has been synthesized such that the scattering densities of the blocks are equal. This polymer provides a transparent matrix in which a composition‐matched blend of homopolymer can be dispersed to isolate the single‐chain scattering function of the homopolymer chains.
ISSN:0887-6266
1099-0488
DOI:10.1002/polb.1987.090250314