Autophobic dewetting of polystyrenes on the substrates grafted with chemically identical polymers

Hoyeon Lee, Wooseop Lee, Young Soo Han, Eunkyoung Kim, Du Yeol Ryu

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We present the autophobic dewetting behavior of polymer melt droplets on chemically identical brushes. The polymer model layers were set to define the interface between polystyrenes (PSs) and corresponding brushes having variable chain lengths (or molecular weights), and then thermally annealed above the glass transition temperature. Autophobic dewetting of polymer melts in a dry brush regime was characterized by well-defined PS melt droplets that dewetted the brushes upon thermal annealing. The contact angle (θ) of PS droplets on the brushes and interfacial tension (γm/b) between the PS melts and brushes significantly increased as the chain length of PS brushes decreased and grafting density increased. We speculated that the γm/b increasingly converges on the maximum interfacial tension (γm/b) at the extremely short and dense PS brush, indicating the super autophobicity of the PS melt on the corresponding brush.

Original languageEnglish
Pages (from-to)503-507
Number of pages5
JournalPolymer Journal
Volume48
Issue number4
DOIs
Publication statusPublished - 2016 Apr 1

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Polystyrenes
Brushes
Polymers
Substrates
Polymer melts
Chain length
Surface tension
Contact angle
Molecular weight
Annealing

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Materials Chemistry

Cite this

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abstract = "We present the autophobic dewetting behavior of polymer melt droplets on chemically identical brushes. The polymer model layers were set to define the interface between polystyrenes (PSs) and corresponding brushes having variable chain lengths (or molecular weights), and then thermally annealed above the glass transition temperature. Autophobic dewetting of polymer melts in a dry brush regime was characterized by well-defined PS melt droplets that dewetted the brushes upon thermal annealing. The contact angle (θ) of PS droplets on the brushes and interfacial tension (γm/b) between the PS melts and brushes significantly increased as the chain length of PS brushes decreased and grafting density increased. We speculated that the γm/b increasingly converges on the maximum interfacial tension (γm/b∗) at the extremely short and dense PS brush, indicating the super autophobicity of the PS melt on the corresponding brush.",
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Autophobic dewetting of polystyrenes on the substrates grafted with chemically identical polymers. / Lee, Hoyeon; Lee, Wooseop; Soo Han, Young; Kim, Eunkyoung; Ryu, Du Yeol.

In: Polymer Journal, Vol. 48, No. 4, 01.04.2016, p. 503-507.

Research output: Contribution to journalArticle

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AU - Ryu, Du Yeol

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