期刊
APPLIED SURFACE SCIENCE
卷 257, 期 6, 页码 2118-2125出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2010.09.060
关键词
Latex; Nano-composite; Solvent resistance; Hardness; Glossiness
类别
资金
- Chemistry Department of Amirkabir University of Technology
- Chemical Department of University of Tehran
To prepare nano-composite emulsion acrylic resins with improved surface hardness and solvent resistance, nano-silica particles were treated with surfactants. The monomers of methyl methacrylate/butylacrylate were co-polymerized on the surface of dispersed silica particles. Several emulsions with different silica contents and copolymer mole fractions were prepared. Finally the emulsions were modified to water-based acrylic coatings and improved properties such as surface hardness, solvent resistance and glossiness were determined. The study of coatings was directed to find the improved resin by optimum surface properties. Size distribution and morphology of latexes were characterized by Fourier transform infrared spectroscopy, dynamic light scattering, transmission electron microscopy and scanning electron microscopy. The glass transition temperature of nano-composites was measured and discussed its relation with silica contents, monomer mole fractions and improved properties of coatings. The optimum pendulum hardness of coatings was on 0.46 methyl methacrylate mole fraction and 120 g silica content. An increase in pendulum hardness of nano-composites with the addition of modified silica was observed. DLS and TEM studies indicate that silica particles were dispersed homogenously through the polymer matrix. (C) 2010 Elsevier B.V. All rights reserved.
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