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

doi:10.1021/ma049329l

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

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

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 language	English
Pages (from-to)	5851-5855
Number of pages	5
Journal	Macromolecules
Volume	37
Issue number	16
DOIs	https://doi.org/10.1021/ma049329l
Publication status	Published - 2004 Aug 10

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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title = "Complex phase behavior of a weakly interacting binary polymer blend",

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.",

author = "Ryu, {Du Yeol} and Lee, {Dong Hyun} and Jin Jang and Kim, {Jin Kon} and Lavery, {Kristopher A.} and Russell, {Thomas P.}",

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AU - Ryu, Du Yeol

AU - Lee, Dong Hyun

AU - Jang, Jin

AU - Kim, Jin Kon

AU - Lavery, Kristopher A.

AU - Russell, Thomas P.

PY - 2004/8/10

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Complex phase behavior of a weakly interacting binary polymer blend

Abstract

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