Influence of Imperfections on the Disordering of Block Copolymer Cylinders

N. P. Balsara, H. J. Dai, P. K. Kesani, B. A. Garetz, B. Hammouda

Research output: Contribution to journalArticlepeer-review


Small-angle neutron scattering and optical birefringence were used to study the disordering transition of a cylindrically ordered block copolymer material. It was found that the disordering temperature of shear-oriented “single crystals” was 62 °C, while that of imperfect, granular samples formed under quiescent conditions was 49 °C. In sheared samples where the imperfections were partially removed, coexistence of ordered and disordered regions was observed at temperatures between 49 and 62 °C.

Original languageEnglish (US)
Pages (from-to)7406-7409
Number of pages4
Issue number25
StatePublished - Dec 1 1994

ASJC Scopus subject areas

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


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