@article {Rahman:November 2007:0169-4243:1575, author = "Rahman, Mohammad Mizanur", author = "Kim, Jeong-Ho", author = "Kim, Han-Do", title = "Characterization of waterborne polyurethane/clay nanocomposite adhesives containing different amounts of ionic groups", journal = "Journal of Adhesion Science and Technology", volume = "21", year = "November 2007", 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.", pages = "1575-1588(14)", url = "http://www.ingentaconnect.com/content/vsp/ast/2007/00000021/00000016/art00003" doi = "doi:10.1163/156856107782793195" }