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Polyurethane/acrylate hybrids: Effects of the acrylic content and thermal treatment on the polymer properties

Authors

  • Pablo J. Peruzzo,

    1. Polymeric Materials and Nanomaterials Group, Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas, UNLP-CCT La Plata, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de La Plata, Diag. 113 y 64 CC 16 Suc. 4, B1904DPI, La Plata, Argentina
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  • Pablo S. Anbinder,

    1. Polymeric Materials and Nanomaterials Group, Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas, UNLP-CCT La Plata, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de La Plata, Diag. 113 y 64 CC 16 Suc. 4, B1904DPI, La Plata, Argentina
    2. Polymeric Materials and Nanomaterials Group, LIMF, Carrera Ingeniería en Materiales, Facultad de Ingeniería, Universidad Nacional de La Plata, Calle 116 y 48, B1900TAG, La Plata, Argentina
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  • Oscar R. Pardini,

    1. Polymeric Materials and Nanomaterials Group, Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas, UNLP-CCT La Plata, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de La Plata, Diag. 113 y 64 CC 16 Suc. 4, B1904DPI, La Plata, Argentina
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  • Carlos A. Costa,

    1. Instituto de Química, Universidade Estadual de Campinas, Caixa Postal 6154, Unicamp, IQ, P.O. Box 6154, 13083-970 Campinas SP, Brazil
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  • Carlos A. Leite,

    1. Instituto de Química, Universidade Estadual de Campinas, Caixa Postal 6154, Unicamp, IQ, P.O. Box 6154, 13083-970 Campinas SP, Brazil
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  • Fernando Galembeck,

    1. Instituto de Química, Universidade Estadual de Campinas, Caixa Postal 6154, Unicamp, IQ, P.O. Box 6154, 13083-970 Campinas SP, Brazil
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  • Javier I. Amalvy

    Corresponding author
    1. Polymeric Materials and Nanomaterials Group, Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas, UNLP-CCT La Plata, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de La Plata, Diag. 113 y 64 CC 16 Suc. 4, B1904DPI, La Plata, Argentina
    2. Polymeric Materials and Nanomaterials Group, LIMF, Carrera Ingeniería en Materiales, Facultad de Ingeniería, Universidad Nacional de La Plata, Calle 116 y 48, B1900TAG, La Plata, Argentina
    • Polymeric Materials and Nanomaterials Group, Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas, UNLP-CCT La Plata, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de La Plata, Diag. 113 y 64 CC 16 Suc. 4, B1904DPI, La Plata, Argentina
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Abstract

Polyurethane (PU)/acrylate hybrids with different acrylic contents (10, 30, 50, 70, and 90 wt %) were prepared by the polymerization of acrylic monomers in the presence of preformed PU chains with polymerizable terminal vinyl groups. Films obtained by the casting of polymer dispersions before and after thermal annealing were characterized by dynamic light scattering, Fourier transform infrared spectroscopy, transmission electron microscopy (TEM), TEM electron energy-loss spectroscopy, differential scanning calorimetry, and gel fraction determination. Small-angle X-ray scattering (SAXS), wide-angle X-ray scattering, mechanical properties testing, atomic force microscopy, water contact angle testing, Buchholz hardness testing, and roughness testing of the films were also performed. The effects of the acrylic content and thermal treatment on the structure and properties were determined. TEM showed that a core–shell morphology was formed during polymerization. When the acrylic content increased, smaller particles without core–shell morphologies were observed. TEM energy-loss spectroscopy studies confirmed this observation. Systems with up to 50 wt % acrylic component were homogeneous, as determined by SAXS, before and after thermal annealing. An attempt to incorporate a higher amount of acrylic component led to phase-separated materials with a different morphology and, therefore, different properties. The relationship between the acrylic content and properties did not follow linear behavior. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010

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