SANS determination of chain conformation in perpendicular-aligned undecablock copolymer lamellae

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Abstract

Small-angle neutron scattering (SANS) measurements were conducted orl mixtures of deuterated and normal compositionally symmetric CPCPCPCPCPC (or (CP) 10) undecablock copolymers, containing pely-(cyclohexylethylene) (C) and poly(ethylene-alt-propylene) (P) blocks. Deuterium labeling was achieved by hydrogenating and deuterating the same (SI) 10 undecablock precursor. SANS patterns obtained from shear-aligned specimens could be separated into molecular scattering and domain scattering. The overall undecablock radii of gyration, extracted using the Guinier relation, indicate that the undecablock chains adopt a three-dimensional random walk in the perpendicular-arranged lamellae.

Original languageEnglish (US)
Pages (from-to)294-299
Number of pages6
JournalMacromolecules
Volume39
Issue number1
DOIs
StatePublished - Jan 10 2006

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