Effect of Hydrostatic Pressure on Closed-Loop Phase Behavior of Block Copolymers

Du Yeol Ryu, Dong Jun Lee, Jin Kon Kim, Kristopher A. Lavery, Thomas P. Russell, Young Soo Han, Baek Seok Seong, Chang Hee Lee, P. Thiyagarajan

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The effect of hydrostatic pressure ([Formula presented]) on closed-loop phase behavior of deuterated polystyrene-block-poly([Formula presented]-pentyl methacrylate) copolymers [dPS-PnPMA] was investigated by using small-angle neutron scattering and birefringence. For [Formula presented], dPS-PnPMA exhibited a lower disorder-to-order transition temperature ([Formula presented]) at [Formula presented], and then an upper order-to-disorder transition temperature ([Formula presented]) at [Formula presented]. With increasing pressure both [Formula presented] and [Formula presented] were markedly changed, where [Formula presented] was [Formula presented] and [Formula presented] was [Formula presented]. These are consistent with predictions by the Clausius-Clapeyron equation using measured values of the volume and enthalpy changes of both transitions. The large pressure coefficients imply that the closed-loop phase behavior observed for PS-PnPMA is an entropic-driven phase transition.

Original languageEnglish
Number of pages1
JournalPhysical Review Letters
Volume90
Issue number23
DOIs
Publication statusPublished - 2003 Jan 1

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block copolymers
hydrostatic pressure
transition temperature
disorders
birefringence
polystyrene
copolymers
neutron scattering
enthalpy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Ryu, D. Y., Lee, D. J., Kim, J. K., Lavery, K. A., Russell, T. P., Han, Y. S., ... Thiyagarajan, P. (2003). Effect of Hydrostatic Pressure on Closed-Loop Phase Behavior of Block Copolymers. Physical Review Letters, 90(23). https://doi.org/10.1103/PhysRevLett.90.235501
Ryu, Du Yeol ; Lee, Dong Jun ; Kim, Jin Kon ; Lavery, Kristopher A. ; Russell, Thomas P. ; Han, Young Soo ; Seong, Baek Seok ; Lee, Chang Hee ; Thiyagarajan, P. / Effect of Hydrostatic Pressure on Closed-Loop Phase Behavior of Block Copolymers. In: Physical Review Letters. 2003 ; Vol. 90, No. 23.
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abstract = "The effect of hydrostatic pressure ([Formula presented]) on closed-loop phase behavior of deuterated polystyrene-block-poly([Formula presented]-pentyl methacrylate) copolymers [dPS-PnPMA] was investigated by using small-angle neutron scattering and birefringence. For [Formula presented], dPS-PnPMA exhibited a lower disorder-to-order transition temperature ([Formula presented]) at [Formula presented], and then an upper order-to-disorder transition temperature ([Formula presented]) at [Formula presented]. With increasing pressure both [Formula presented] and [Formula presented] were markedly changed, where [Formula presented] was [Formula presented] and [Formula presented] was [Formula presented]. These are consistent with predictions by the Clausius-Clapeyron equation using measured values of the volume and enthalpy changes of both transitions. The large pressure coefficients imply that the closed-loop phase behavior observed for PS-PnPMA is an entropic-driven phase transition.",
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Ryu, DY, Lee, DJ, Kim, JK, Lavery, KA, Russell, TP, Han, YS, Seong, BS, Lee, CH & Thiyagarajan, P 2003, 'Effect of Hydrostatic Pressure on Closed-Loop Phase Behavior of Block Copolymers', Physical Review Letters, vol. 90, no. 23. https://doi.org/10.1103/PhysRevLett.90.235501

Effect of Hydrostatic Pressure on Closed-Loop Phase Behavior of Block Copolymers. / Ryu, Du Yeol; Lee, Dong Jun; Kim, Jin Kon; Lavery, Kristopher A.; Russell, Thomas P.; Han, Young Soo; Seong, Baek Seok; Lee, Chang Hee; Thiyagarajan, P.

In: Physical Review Letters, Vol. 90, No. 23, 01.01.2003.

Research output: Contribution to journalArticle

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AU - Ryu, Du Yeol

AU - Lee, Dong Jun

AU - Kim, Jin Kon

AU - Lavery, Kristopher A.

AU - Russell, Thomas P.

AU - Han, Young Soo

AU - Seong, Baek Seok

AU - Lee, Chang Hee

AU - Thiyagarajan, P.

PY - 2003/1/1

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N2 - The effect of hydrostatic pressure ([Formula presented]) on closed-loop phase behavior of deuterated polystyrene-block-poly([Formula presented]-pentyl methacrylate) copolymers [dPS-PnPMA] was investigated by using small-angle neutron scattering and birefringence. For [Formula presented], dPS-PnPMA exhibited a lower disorder-to-order transition temperature ([Formula presented]) at [Formula presented], and then an upper order-to-disorder transition temperature ([Formula presented]) at [Formula presented]. With increasing pressure both [Formula presented] and [Formula presented] were markedly changed, where [Formula presented] was [Formula presented] and [Formula presented] was [Formula presented]. These are consistent with predictions by the Clausius-Clapeyron equation using measured values of the volume and enthalpy changes of both transitions. The large pressure coefficients imply that the closed-loop phase behavior observed for PS-PnPMA is an entropic-driven phase transition.

AB - The effect of hydrostatic pressure ([Formula presented]) on closed-loop phase behavior of deuterated polystyrene-block-poly([Formula presented]-pentyl methacrylate) copolymers [dPS-PnPMA] was investigated by using small-angle neutron scattering and birefringence. For [Formula presented], dPS-PnPMA exhibited a lower disorder-to-order transition temperature ([Formula presented]) at [Formula presented], and then an upper order-to-disorder transition temperature ([Formula presented]) at [Formula presented]. With increasing pressure both [Formula presented] and [Formula presented] were markedly changed, where [Formula presented] was [Formula presented] and [Formula presented] was [Formula presented]. These are consistent with predictions by the Clausius-Clapeyron equation using measured values of the volume and enthalpy changes of both transitions. The large pressure coefficients imply that the closed-loop phase behavior observed for PS-PnPMA is an entropic-driven phase transition.

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