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Influence of Nanoparticles on Glass Transition of Polymers

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Tunability of glass transition temperature of poly-methylmethacrylate has been achieved using homogeneously dispersed gold nanoparticles of different weight fraction within the polymer matrix. Remarkably, depression in glass transition temperature with respect to the neat polymer was observed for poly-methylmethacrylate (120K and 15 K) by varying the weight fraction of the gold nanoparticles contrary to the conventional results in literature which shows elevation in T g for attractive polymer–particle interaction, as is the case here. The magnitude of the shift in glass transition temperature is large for the higher of the two molecular weight of poly-methylmethacrylate studied here. Possible explanations of the observed behavior are provided, although more experiments are underway to unravel the intricacies of the observed phenomena.
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Document Type: Research Article

Publication date: 2007-06-01

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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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