Closed-loop phase behavior for weakly interacting block copolymers

Chaoxu Li, Dong Hyun Lee, Jin Kon Kim, Du Yeol Ryu, Thomas P. Russell

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Polystyrene-block-poly(n-butyl methacrylate) copolymer (PS-b-PnBMA) exhibits only a lower disorder-to-order transition (LDOT), not a closed-loop phase behavior, within an experimentally accessible temperature range. But, when mixed solvents of di-n-octyl phthalate and hexadecane were added to PS-b-PnBMA, this mixture exhibited the upper order-to-disorder transition (UODT) below the degradation temperature as well as an LDOT above the glass transition temperatures of both blocks; thus, a close-loop phase behavior was observed. These results suggest that the closed-loop phase behavior may be a general phenomenon for weakly interacting polystyrene-block-poly(n-alkyl methacrylate) copolymers with LDOT.

Original languageEnglish
Pages (from-to)5926-5930
Number of pages5
JournalMacromolecules
Volume39
Issue number17
DOIs
Publication statusPublished - 2006 Aug 22

Fingerprint

Polystyrenes
Phase behavior
Block copolymers
Copolymers
Methacrylates
Degradation
Temperature
poly(butyl methacrylate)

All Science Journal Classification (ASJC) codes

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

Cite this

Li, Chaoxu ; Lee, Dong Hyun ; Kim, Jin Kon ; Ryu, Du Yeol ; Russell, Thomas P. / Closed-loop phase behavior for weakly interacting block copolymers. In: Macromolecules. 2006 ; Vol. 39, No. 17. pp. 5926-5930.
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abstract = "Polystyrene-block-poly(n-butyl methacrylate) copolymer (PS-b-PnBMA) exhibits only a lower disorder-to-order transition (LDOT), not a closed-loop phase behavior, within an experimentally accessible temperature range. But, when mixed solvents of di-n-octyl phthalate and hexadecane were added to PS-b-PnBMA, this mixture exhibited the upper order-to-disorder transition (UODT) below the degradation temperature as well as an LDOT above the glass transition temperatures of both blocks; thus, a close-loop phase behavior was observed. These results suggest that the closed-loop phase behavior may be a general phenomenon for weakly interacting polystyrene-block-poly(n-alkyl methacrylate) copolymers with LDOT.",
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Li, C, Lee, DH, Kim, JK, Ryu, DY & Russell, TP 2006, 'Closed-loop phase behavior for weakly interacting block copolymers', Macromolecules, vol. 39, no. 17, pp. 5926-5930. https://doi.org/10.1021/ma0610055

Closed-loop phase behavior for weakly interacting block copolymers. / Li, Chaoxu; Lee, Dong Hyun; Kim, Jin Kon; Ryu, Du Yeol; Russell, Thomas P.

In: Macromolecules, Vol. 39, No. 17, 22.08.2006, p. 5926-5930.

Research output: Contribution to journalArticle

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AU - Li, Chaoxu

AU - Lee, Dong Hyun

AU - Kim, Jin Kon

AU - Ryu, Du Yeol

AU - Russell, Thomas P.

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AB - Polystyrene-block-poly(n-butyl methacrylate) copolymer (PS-b-PnBMA) exhibits only a lower disorder-to-order transition (LDOT), not a closed-loop phase behavior, within an experimentally accessible temperature range. But, when mixed solvents of di-n-octyl phthalate and hexadecane were added to PS-b-PnBMA, this mixture exhibited the upper order-to-disorder transition (UODT) below the degradation temperature as well as an LDOT above the glass transition temperatures of both blocks; thus, a close-loop phase behavior was observed. These results suggest that the closed-loop phase behavior may be a general phenomenon for weakly interacting polystyrene-block-poly(n-alkyl methacrylate) copolymers with LDOT.

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