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Effect of DMPA-Clay-POSS Content on Thermal and Mechanical Properties of Nanostructured Ionomeric Polyurethanes

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Two series of ionomeric waterborne polyurethane (WBPU)/POSS-clay hybrid nanocomposites were synthesized using various amounts of a diol-functionalized polyhedral oligomeric silsesquioxane (POSS)/clay (Cloisite 15A) component with two different 2,2-dimethylol propionic acid (DMPA) contents (13.58 mole% and 23.89 mole%). The Tg of WBPU/POSS-clay hybrid nanocomposite was shifted towards higher temperatures in comparison to virgin WBPU and WBPU/clay nanocomposites. The thermal stability of the investigated WBPU/POSS-clay hybrid nanocomposites also dramatically improved compared to pristine WBPU and WBPU/clay nanocomposites. The higher Young's modulus of the WBPU/POSS-clay hybrid nanocomposites as a function of optimal POSS content suggests that the organic–inorganic hybrid networks are significantly reinforced by the inclusion of POSS.
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Document Type: Research Article

Publication date: 2010-10-01

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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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