Light Scattering and Microscopy from Block Copolymers with Cylindrical Morphology

M. C. Newstein, B. A. Garetz, H. J. Dai, N. P. Balsara

Research output: Contribution to journalArticlepeer-review

Abstract

Cylindrical-morphology diblock copolymers, when ordered under quiescent conditions, exhibit a 4-fold cloverleaf Hv (depolarized) light scattering pattern, with an off-axis intensity maximum. The grain structure of these samples has been resolved by polarized-light microscopy. Closely-spaced grain pairs, whose optic axes are approximately perpendicular, have been observed. A correlated-grain-pair model is proposed, and scattering patterns are calculated using a correlation function approach. A 4-fold symmetry is a consequence of this model, and for some limited sets of model parameters, a qualitative agreement with experiment is observed.

Original languageEnglish (US)
Pages (from-to)4587-4597
Number of pages11
JournalMacromolecules
Volume28
Issue number13
DOIs
StatePublished - Jun 1 1995

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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