Baroplastic behavior of miscible block copolymer blends

Yonghoon Lee, Hoyeon Lee, Sang Woo Kim, Sungmin Park, Eunhye Kim, Young Soo Han, Du Yeol Ryu

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6 Citations (Scopus)

Abstract

Pressure dependence of various phase transitions for the miscible block copolymer (BCP) blends was evaluated by depolarized light scattering (DPLS) and small-angle neutron scattering (SANS) measurements, in which the blends consist of a polystyrene-b-poly(n-butyl methacrylate) (PS-b-PnBMA) and a deuterated polystyrene-b-poly(n-hexyl methacrylate) (dPS-b-PnHMA). Excellent baroplasticity was observed in nearly symmetric blends of PS-b-PnBMA/dPS-b-PnHMA, leading to the most outstanding pressure coefficients, |dT/dP|, in a closed-loop type phase behavior between a lower disorder-to-order transition (LDOT) and an order-to-disorder transition (ODT) type phase behavior. Together with the estimated pressure coefficients based on the values of enthalpic and volumetric changes at phase transitions, we demonstrate that the entropic compressibility for the miscible BCP blends is a baroplastic indicator, which was characterized by the negative volume change on mixing (&Vmix) at transitions.

Original languageEnglish
Pages (from-to)6967-6972
Number of pages6
Journalpolymer
Volume55
Issue number26
DOIs
Publication statusPublished - 2014 Dec 15

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All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Lee, Y., Lee, H., Kim, S. W., Park, S., Kim, E., Han, Y. S., & Ryu, D. Y. (2014). Baroplastic behavior of miscible block copolymer blends. polymer, 55(26), 6967-6972. https://doi.org/10.1016/j.polymer.2014.11.011