Chain Stiffness of Stilbene Containing Alternating Copolymers by SAXS and SEC

Persistence lengths of stilbene and styrene containing alternating copolymers were measured using small-angle X-ray scattering (SAXS) and size-exclusion chromatography (SEC). For SAXS measurement, a graphical approach and the Sharp and Bloomfield method of analyzing scattering data were both used to...

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Bibliographic Details
Published in:Macromolecules 2012-02, Vol.45 (3), p.1595-1601
Main Authors: Li, Yi, Zhang, Mingqiang, Mao, Min, Turner, S. Richard, Moore, Robert B, Mourey, Thomas H, Slater, Lisa A, Hauenstein, James R
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Solution and gel properties
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Summary:Persistence lengths of stilbene and styrene containing alternating copolymers were measured using small-angle X-ray scattering (SAXS) and size-exclusion chromatography (SEC). For SAXS measurement, a graphical approach and the Sharp and Bloomfield method of analyzing scattering data were both used to quantify the chain stiffness. For SEC measurement, the Bohdanecký linear approximation was applied to determine persistence lengths. The complementary results obtained from SAXS approaches as well as from SEC measurements characterized stilbene copolymers as a class of semirigid polymers with persistence lengths in a range of 2–6 nm. Stilbene copolymers are more rigid than their styrene analogues.
ISSN:0024-9297
1520-5835
DOI:10.1021/ma202406a