Waterborne Polyurethane-Acrylic Hybrid Nanoparticles by Miniemulsion Polymerization: Applications in Pressure-Sensitive Adhesives
Lopez, A, Degrandi-Contraires, E, Canetta, E, Creton, C, Keddie, JL and Asua, JM (2011) Waterborne Polyurethane-Acrylic Hybrid Nanoparticles by Miniemulsion Polymerization: Applications in Pressure-Sensitive Adhesives LANGMUIR, 27 (7). 3878 - 3888. ISSN 0743-7463
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Official URL: http://dx.doi.org/10.1021/la104830u
Waterborne polyurethane-acrylic hybrid nanoparticles for application as pressure-sensitive adhesives (PSAs) were prepared by one-step miniemulsion polymerization. The addition of polyurethane to a standard waterborne acrylic formulation results in a large increase in the cohesive strength and hence a much higher shear holding time (greater than seven weeks at room temperature), which is a very desirable characteristic for PSAs. However, with the increase in cohesion, there is a decrease in the relative viscous component, and hence there is a decrease in the tack energy. The presence of a small concentration of methyl methacrylate (MMA) in the acrylic copolymer led to phase separation within the particles and created a hemispherical morphology. The tack energy was particularly low in the hybrid containing MMA because of the effects of lower energy dissipation and greater cross-linking. These results highlight the great sensitivity of the viscoelastic and adhesive properties to the details of the polymer network architecture and hence to the precise composition and synthesis conditions.
|Additional Information:||This document is the Accepted Manuscript version of a Published Work that appeared in final form in Langmuir, copyright © American Chemical Society, after peer review and technical editing by the publisher.|
|Uncontrolled Keywords:||ATOMIC-FORCE MICROSCOPY, LIMITING CONVERSION PHENOMENON, SCANNING PROBE MICROSCOPY, BISPHENOL-A DERIVATIVES, MECHANICAL-PROPERTIES, EMULSION POLYMERIZATION, LATEX FILMS, METHACRYLATE POLYMERIZATION, RADICAL SCAVENGERS, COMPOSITE LATEX|
|Divisions:||Faculty of Engineering and Physical Sciences > Physics|
|Deposited By:||Symplectic Elements|
|Deposited On:||12 Aug 2011 12:01|
|Last Modified:||16 Feb 2013 14:48|
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