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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12 Citations (Scopus)


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
Issue number26
Publication statusPublished - 2014 Dec 15

Bibliographical note

Funding Information:
This work was supported by the NRF grants ( 2011-0022690 ), Nuclear R&D Programs, and APCPI ERC ( 2007-0056091 ) funded by the Ministry of Science, ICT & Future Planning (MSIP), Korea .

Publisher Copyright:
© 2014 Elsevier Ltd. All rights reserved.

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry


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