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Issue 11, 2011
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Surface segregation of poly(2-methoxyethyl acrylate) in a mixture with poly(methyl methacrylate)

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Abstract

Poly(2-methoxyethyl acrylate) (PMEA) exhibits excellent blood compatibility. To understand why such a surface functionality exists, the surface of PMEA should be characterized in detail, structurally and dynamically, under not only ambient conditions, but also in water. However, a thin film of PMEA supported on a solid substrate can be easily broken, namely it is dewetted. Our strategy to overcome this difficulty is to mix PMEA with poly(methyl methacrylate) (PMMA). Differential scanning calorimetry and cloud point measurements revealed that the PMEA/PMMA blend has a phase diagram with a lower critical solution temperature. The blend surface was also characterized by X-ray photoelectron spectroscopy in conjunction with microscopic observations. Although PMEA is preferentially segregated over PMMA at the blend surface due to its lower surface free energy, the extent of segregation in the as-prepared films was not sufficient to cover the surface. Annealing the blend film at an appropriate temperature, higher than the glass transition temperature and lower than the phase-separation temperature of the blend, enabled us to prepare a stable and flat surface that was perfectly covered with PMEA.

Graphical abstract: Surface segregation of poly(2-methoxyethyl acrylate) in a mixture with poly(methyl methacrylate)

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Publication details

The article was received on 10 Oct 2010, accepted on 16 Dec 2010 and first published on 18 Jan 2011


Article type: Paper
DOI: 10.1039/C0CP02101F
Citation: Phys. Chem. Chem. Phys., 2011,13, 4928-4934
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    Surface segregation of poly(2-methoxyethyl acrylate) in a mixture with poly(methyl methacrylate)

    T. Hirata, H. Matsuno, M. Tanaka and K. Tanaka, Phys. Chem. Chem. Phys., 2011, 13, 4928
    DOI: 10.1039/C0CP02101F

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