Identification of the molecular parameters that govern ordering kinetics in a block copolymer melt

N. P. Balsara, B. A. Garetz, M. Y. Chang, H. J. Dai, M. C. Newstein, J. L. Goveas, R. Krishnamoorti, S. Rai

Research output: Contribution to journalArticle

Abstract

The objective of this paper is to identify the molecular parameters that govern ordering kinetics in a diblock copolymer melt. Experimental data on the ordering kinetics were obtained by time-resolved depolarized light scattering after the sample was quenched from the disordered to the ordered state. The ordered state consisted of cylinders arranged on a hexagonal lattice. During the early stages of the disorder-to-order transition, a dilute suspension of ordered grains grow by invading the surrounding, disordered phase. A time-dependent Ginzburg-Landau model was used to relate the growth rate of these grains to molecular parameters. The growth rate is predicted to be proportional to the quench depth and chain radius of gyration and inversely proportional to the molecular relaxation time. Independent estimates of these parameters were obtained from small angle neutron scattering and rheological measurements. The experimentally determined grain growth rates are in good agreement with theoretical predictions, with no adjustable parameters.

Original languageEnglish (US)
Pages (from-to)5309-5315
Number of pages7
JournalMacromolecules
Volume31
Issue number16
DOIs
StatePublished - Aug 11 1998

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Identification of the molecular parameters that govern ordering kinetics in a block copolymer melt'. Together they form a unique fingerprint.

  • Cite this

    Balsara, N. P., Garetz, B. A., Chang, M. Y., Dai, H. J., Newstein, M. C., Goveas, J. L., Krishnamoorti, R., & Rai, S. (1998). Identification of the molecular parameters that govern ordering kinetics in a block copolymer melt. Macromolecules, 31(16), 5309-5315. https://doi.org/10.1021/ma980457h