Complex phase behavior of a weakly interacting binary polymer blend

Du Yeol Ryu, Dong Hyun Lee, Jin Jang, Jin Kon Kim, Kristopher A. Lavery, Thomas P. Russell

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Abstract

The complex phase behavior of a weakly interacting binary polymer blend was studied. It was shown that the weakly interacting PS/poly(n-pentylmethacrylate) blend exhibits both a UCST and an LCST. The PS-block-poly(n-pentyl methacrylate) copolymers [PS-b-PnPMA] exhibit closed-loop phase behavior, where the lower disorder-to-order transition (LDOT) and upper-to-disorder transition (UODT) curves from the lower and upper bounds of closed loop. The major difference in the phase behavior of PS/PnPMA blends from that of PS-b-PnPMA copolymers was the lack of evidence of an upper critical solution transition (u-UCST) above an observed LCST in the blend system. The LCST was characterized by a negative volume change on mixing, resulting in enhanced miscibility.

Original languageEnglish
Pages (from-to)5851-5855
Number of pages5
JournalMacromolecules
Volume37
Issue number16
DOIs
Publication statusPublished - 2004 Aug 10

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All Science Journal Classification (ASJC) codes

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

Cite this

Ryu, D. Y., Lee, D. H., Jang, J., Kim, J. K., Lavery, K. A., & Russell, T. P. (2004). Complex phase behavior of a weakly interacting binary polymer blend. Macromolecules, 37(16), 5851-5855. https://doi.org/10.1021/ma049329l