Well-ordered microdomain structures in polydisperse poly(styrene)-poly(acrylic acid) diblock copolymers from controlled radical polymerization

D. Bendejacq, Virginie Ponsinet, M. Joanicot, Yueh Lin Loo, Richard Alan Register

Research output: Contribution to journalArticle

126 Scopus citations

Abstract

To investigate whether diblock copolymers with substantial distributions of molecular weight and composition can self-assemble into highly regular microdomain structures, we examine the morphologies of polystyrene-b-poly(acrylic acid), diblock copolymers (PS-PAA) synthesized by controlled radical polymerization in emulsion. Despite diblock polydispersity indices of ca. 2, solvent-cast films of these diblocks, as well as their blends with PS homopolymer of low molecular weight, exhibit well-ordered lamellar or hexagonally packed cylindrical morphologies in the midrange of composition, as shown by small-angle X-ray scattering and transmission electron microscopy. In several specimens, well-ordered regions of lamellae and cylinders appear to coexist, Films of very asymmetric diblocks or blends exhibit spherical microdomains without lattice order.

Original languageEnglish (US)
Pages (from-to)6645-6649
Number of pages5
JournalMacromolecules
Volume35
Issue number17
DOIs
StatePublished - Aug 13 2002

All Science Journal Classification (ASJC) codes

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

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