News Column

Studies from Tianjin University Describe New Findings in Acrylates

February 28, 2014



By a News Reporter-Staff News Editor at Science Letter -- Data detailed on Acrylates have been presented. According to news reporting originating from Tianjin, People's Republic of China, by NewsRx correspondents, research stated, "Recently, confinement of polymers with different geometries has become a research hotspot. Here, we report the dramatic deviation of glass transition behaviors of poly(methyl methacrylate) (PMMA) confined in cylindrical nanopores with diameter significantly larger than chain's radius of gyration (R-g."

Our news editors obtained a quote from the research from Tianjin University, "Fast cooling a PMMA melt in the nanopores results in a glass with one single glass transition temperature (T-g). But two distinct T(g)s are detected after slow cooling the melt. The deviation in T-g could be as large as 45 K. This phenomenon is interpreted by a two-layer model. During vitrification under slow cooling two distinct layers are formed: a strongly constrained interfacial layer showing an increased T-g as compared to that of the bulk polymer and a core with a decreased T-g. By thermal annealing experiments, we find that these two T(g)s are inherently correlated."

According to the news editors, the research concluded: "In addition, the deviation of T-g for PMMA confined in nanopores reveals a dependence on molecular weight."

For more information on this research see: Double Glass Transition Temperatures of Poly(methyl methacrylate) Confined in Alumina Nanotube Templates. Macromolecules, 2014;47(1):297-303. Macromolecules can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Macromolecules - www.pubs.acs.org/journal/mamobx)

The news editors report that additional information may be obtained by contacting L.L. Li, Tianjin University, Sch Mat Sci & Engn, Dept. of Polymer Mat Sci & Engn, Tianjin 300072, People's Republic of China. Additional authors for this research include D.S. Zhou, D.H. Huang and G. Xue (see also Acrylates).

Keywords for this news article include: Asia, Tianjin, Methacrylates, People's Republic of China

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


For more stories covering the world of technology, please see HispanicBusiness' Tech Channel



Source: Science Letter


Story Tools