Enhanced Segregation of a Diblock Copolymer Caused by Hydrogen Bonding

Kevin H. Dai*, Edward J. Kramer, Jean M.J. Fréchet, Paul G. Wilson, Robert S. Moore, Timothy Edward Long

*この研究の対応する著者

研究成果: Article査読

15 被引用数 (Scopus)

抄録

Utilizing forward recoil spectrometry (FRES), we have determined the segregation isotherm which describes the interfacial excess zi* of diblock copolymers of poly(d8-styrene-b-2-vinylpyridine) [dPSPVP] at the interface between the PS/PVP, PS/poly(4-vinyl phenol) [PS/PVPh], and PS/poly(4-vinylbenzoic acid) [PS/PVBA] as a function of ϕ, the volume fraction of diblock copolymer remaining in the host PS phase after annealing the specimens to reach the equilibrium segregation. A remarkable increase in the saturation Zi* is observed at the PS/PVBA and the PS/PVPh interfaces as compared to that at the corresponding PS/PVP interface. This enhanced segregation is caused by an attraction due to the formation of hydrogen bonds of the PVP block with PVBA and PVPh homopolymers. The segment density profile of copolymer at the PS/PVBA interface determined by neutron reflectometry indicates that the interface is almost totally occupied by the copolymer and the copolymer chains at the interface are highly stretched. This result suggests that the interface is close to the “brush” structure as pictured by Leibler.

本文言語English
ページ(範囲)5187-5191
ページ数5
ジャーナルMacromolecules
27
18
DOI
出版ステータスPublished - 1994 8 1
外部発表はい

ASJC Scopus subject areas

  • 有機化学
  • ポリマーおよびプラスチック
  • 無機化学
  • 材料化学

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