By a News Reporter-Staff News Editor at Journal of Technology -- Research findings on Polymer Research are discussed in a new report. According to news originating from Cleveland, Ohio, by VerticalNews correspondents, research stated, "The values of the fragility index of polycarbonate/poly(methylmetacrylate) multilayer films have been determined for materials having thicknesses varying from micro- to nano-scales. The influence of the layer thickness reduction down to 12 nm has been shown to have very different influence on the glass transition parameters of the two polymers."
Our news journalists obtained a quote from the research from Case Western Reserve University, "Polycarbonate has exhibited a huge sensitivity to such geometric scale modifications while no modification has been observed for PMMA. A large decrease of the fragility index m, has been observed for PC. This modification is proportional to length scale variations of molecular cooperative motions at T-g, xi(T-g). In regard to the molecular structure of each polymer, these results show that this correlation between fragility index and xi(T-g) is mainly associated to modifications of intermolecular interactions and local density."
According to the news editors, the research concluded: "These material parameters are influencing the activation volume Delta V-# which plays a role on the modification of the fragility index."
For more information on this research see: Fragility and molecular mobility in micro- and nano-layered PC/PMMA films. Polymer, 2014;55(6):1546-1551. Polymer can be contacted at: Elsevier Sci Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England. (Elsevier - www.elsevier.com; Polymer - www.elsevier.com/wps/product/cws_home/30466)
The news correspondents report that additional information may be obtained from K. Arabeche, Case Western Reserve University, Dept. of Macromol Sci, Cleveland, OH 44106, United States. Additional authors for this research include L. Delbreilh, J.M. Saiter, G.H. Michler, R. Adhikari and E. Baer.
Keywords for this news article include: Ohio, Cleveland, United States, Polymer Research, North and Central America
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