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A Reexamination of Single Chain Scattering in Heterogeneous Block Copolymers.
MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CHEMICAL ENGINEERING
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Calculations utilizing a scattering formalism due to deGennes are compared with previously-reported SANS data from two polystyrene-polybutadiene samples which have been blended with similar diblocks in which the B segment is deuterated. The present conclusion is that both the lower- and higher- molecular-weight samples exhibit scattering in excess of that predicted, presumably due to clustering of the labelled chains or some other chain-length dependent phenomenon. Keywords small angle neutron scattering.
APPROVED FOR PUBLIC RELEASE