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Reinforcement of Polymeric Latexes by In Situ Polymerization

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Abstract:

Two silicas with different particle sizes have been synthesized by the Stöber method. The particles have been functionalized with methacryloyl groups. In situ emulsion polymerization of butyl acrylate and methyl methacrylate in the presence of functionalized silica particles was performed. The ratio of butyl acrylate to methyl methacrylate was varied in order to optimize the composition for improvement of tribological and thermophysical properties. The silica particles morphology and functionalization have been determined respectively by scanning electronic microscopy and infrared spectroscopy. The composites were characterized also by thermogravimetric analysis, differential scanning calorimetry, microscratch testing and static light scattering. The latex reinforced with the smallest functionalized silica exhibits higher thermal stability than the non reinforced latex, along with lower penetration depth and higher residual depth in progressive load scratch testing. Thus, the resistance to penetration is increased while viscoelastic healing is hampered by silica particles.

Keywords: EMULSION POLYMERIZATION; HYBRID LATEXES; SCRATCH RESISTANCE; SILICA PARTICLES

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2009.1329

Publication date: November 1, 2009

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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