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Findings in Nanoporous Reported from University of Osnabrueck (Dynamics of Unentangled cis-1,4-Polyisoprene Confined to Nanoporous Alumina)

August 8, 2014

By a News Reporter-Staff News Editor at Science Letter -- Investigators discuss new findings in Nanoporous. According to news reporting originating in Osnabruck, Germany, by NewsRx journalists, research stated, "The dynamics of unentangled cis-1,4-polyisoprene confined within self-ordered nanoporous alumina (AAO) is studied as a function of molecular weight (5000-300 g/mol) and pore size (400-25 nm) with dielectric spectroscopy. The main effects are the pronounced broadening of both segmental and chain modes with decreasing AAO pore diameter."

The news reporters obtained a quote from the research from the University of Osnabrueck, "This suggests that the global chain relaxation is retarded on confinement. Remarkably, the distribution of relaxation times is broadened even within pores with size 50 times the unperturbed chain dimensions. The glass temperature is unaffected by confinement. These results are discussed in terms of confinement and adsorption effects. Confinement effects are negligible for the studied molecular weights."

According to the news reporters, the research concluded: "Chain adsorption, on the other hand, involves time and length scales distinctly different from the bulk that can account for the experimental findings."

For more information on this research see: Dynamics of Unentangled cis-1,4-Polyisoprene Confined to Nanoporous Alumina. Macromolecules, 2014;47(12):3895-3900. Macromolecules can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society -; Macromolecules -

Our news correspondents report that additional information may be obtained by contacting S. Alexandris, University of Osnabruck, Inst Chem Neuer Mat, D-49069 Osnabruck, Germany. Additional authors for this research include G. Sakellariou, M. Steinhart and G. Foudas (see also Nanoporous).

Keywords for this news article include: Europe, Germany, Osnabruck, Nanoporous, Nanotechnology, Emerging Technologies

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Source: Science Letter

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