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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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Abstract

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.

Item Type: Article
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
Depositing User: Symplectic Elements
Date Deposited: 12 Aug 2011 11:01
Last Modified: 23 Sep 2013 18:44
URI: http://epubs.surrey.ac.uk/id/eprint/7108

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