| 查看: 116 | 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 Closer to the glass transition temperature Tg, diffusion is superseded by a hyperdiffusive process that first becomes observable near a crossover temperature Tc1.1Tg and is identified with heterogeneous strain in the melts.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
338求调剂
已经有6人回复
-
320求调剂
已经有5人回复
-
324求调剂
已经有4人回复
-
085404总分289，求调剂
已经有3人回复
-
英一数一408，总分284，二战真诚求调剂
已经有15人回复
-
求调剂不挑专业
已经有3人回复
-
0854求调剂
已经有3人回复
-
344材料与化工调剂
已经有5人回复
-
317分 一志愿南理工材料工程 本科湖工大 求调剂
已经有13人回复
-
271分求调剂学校
已经有10人回复
