Effect of surface molecular aggregation state and surface molecular motion on wetting behavior of water on poly(fluoroalkyl methacrylate) thin films

Koji Honda, Masamichi Morita, Osami Sakata, Sono Sasaki, Atsushi Takahara

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97 Citations (Scopus)

Abstract

The effect of surface molecular motion on the wetting behavior of water on the thin film surfaces of poly(fluoroalkyl methacrylate)s with various fluoroalkyl (Rf) groups [PFMA-Cy; y: fluoromethylene number in Rf groups, y = 1, 2, 4, 6, and 8] was characterized. The receding contact angle of PFMA-Cy with short Rf groups (y = 1,2,4, and 6) was larger than that of poly(fluoroalkyl acrylate) with short R f groups [PFA-Cy, y ≤ 6]. This stable hydrophobicity observed for PFMA-Cy is due to the restriction of thermal molecular motion by the α-methyl group. Wide-angle X-ray diffraction (WAXD) and grazing incidence WAXD measurements revealed that the Rf groups [PFMA-Cy, y ≤ 6] were not crystallized. PFMA-C8 showed high advancing and receding contact angles due to the crystallization of fluoroalkyl groups at the surface region. The hydrophobicity of PFMA-C 8 was improved after annealing due to the ordering of fluoroalkyl groups.

Original languageEnglish
Pages (from-to)454-460
Number of pages7
JournalMacromolecules
Volume43
Issue number1
DOIs
Publication statusPublished - Jan 12 2010

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All Science Journal Classification (ASJC) codes

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

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