Model for micelle formation in copolymer/homopolymer blends

Chengheng R. Kao, M Olvera de la Cruz*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Polydisperse micelle formation in dilute solutions of A-B diblock copolymer in A homopolymer is studied. The standard free energy of micellization, the critical micelle concentration (c.m.c.), the average micelle sizes, and the micelle size distribution are determined. The effects of copolymer concentration, B block length nB, and temperature (in terms of the Flory's interaction parameter χ) on micellar behavior are examined. The width of the micelle size distribution is shown to be inversely proportional to the square root of the curvature of the standard free energy of micellization. The polydispersity of the micelles decreases with increasing copolymer concentration, being high for concentration below and around the c.m.c. The polydispersity also depends on nBχ, with high polydispersity corresponding to small nBχ values. The average micelle size exhibits sudden growth at the c.m.c. and increases slightly beyond the c.m.c.

Original languageEnglish (US)
Pages (from-to)8284-8293
Number of pages10
JournalThe Journal of Chemical Physics
Volume93
Issue number11
DOIs
StatePublished - Jan 1 1990

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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