| 查看: 117 | 回复: 0 | |||
| 当前主题已经存档。 | |||
[资源]
PRL 悬浊液模型研究玻璃转变
|
|||
|
Nanoparticle Motion within Glassy Polymer Melts Phys. Rev. Lett. 102, 075702 (2009) [4 pages] Hongyu Guo,1 Gilles Bourret,2 Muriel K. Corbierre,2 Simona Rucareanu,2 R. Bruce Lennox,2 Khalid Laaziri,3 Luc Piche,3 Mark Sutton,3 James L. Harden,4 and Robert L. Leheny1 1Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA 2Department of Chemistry, McGill University, Montréal, Québec H3A 2K6, Canada 3Department of Physics, McGill University, Montréal, Québec H3A 2K6, Canada 4Department of Physics, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada Received 16 July 2008; published 20 February 2009 X-ray photon correlation spectroscopy is employed to investigate the motion of dilute suspensions of gold nanoparticles in low-molecular-weight polystyrene melts. At high temperatures, the observed motion is diffusive, with a rate that follows a Vogel-Fulcher temperature dependence. Closer to the glass transition temperature Tg, diffusion is superseded by a hyperdiffusive process that first becomes observable near a crossover temperature Tc1.1Tg and is identified with heterogeneous strain in the melts. Following rapid cooling to temperatures sufficiently below Tc, but still above Tg, the hyperdiffusive dynamics displays a time dependence similar to aging in polymer glasses. ©2009 The American Physical Society http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000102000007075702000001&idtype=cvips&gifs=yes [ Last edited by hslining on 2009-9-10 at 15:12 ] |
回复此楼» 猜你喜欢
材料专硕283求调剂
已经有15人回复
-
求调剂
已经有14人回复
-
（调剂）一志愿报考哈尔滨工业大学0857资源与环境专业378分考生
已经有3人回复
-
本科211，293分请求调剂
已经有9人回复
-
315求调剂
已经有4人回复
-
308求调剂
已经有4人回复
-
301求调剂
已经有4人回复
-
304求调剂
已经有5人回复
-
302分 085601求调剂推荐
已经有9人回复
-
一志愿9材料学硕297已过六级求调剂推荐
已经有12人回复
