Characterization of waterborne polyurethane/clay nanocomposite adhesives containing different amounts of ionic groups
Authors: Rahman, Mohammad Mizanur1; Kim, Jeong-Ho2; Kim, Han-Do1
Source: Journal of Adhesion Science and Technology, Volume 21, Number 16, 2007 , pp. 1575-1588(14)
Publisher: VSP, an imprint of Brill
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Abstract:
A series of waterborne polyurethane (WBPU)/clay nanocomposite dispersions containing different amounts of 2,2-dimethylol propionic acid (DMPA) and clay were prepared. It was found that the properties of WBPU/clay nanocomposites were highly dependent on both clay content and DMPA content. The WBPU/clay nanocomposite dispersion with a higher clay content showed a larger mean particle size and a less negative zeta potential. The optimum clay content, which increased with increasing DMPA content, showed maximum tensile strength, Young's modulus and adhesive strength of WBPU/clay nanocomposite. The optimum clay concentrations for WBPU/clay nanocomposite samples containing 3.75, 5.41 and 6.17 wt% DMPA were about 0.5, 1.0 and 2.0 wt%, respectively.Keywords: POLYURETHANES; ADHESIVES; CLAY; NANOCOMPOSITES
Document Type: Research article
DOI: 10.1163/156856107782793195
Affiliations: 1: Department of Organic Material Science & Engineering, Pusan National University, Busan 609-735, South Korea 2: Department of Chemical Engineering, The University of Suwon, Suwon 445-743, South Korea
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