| 查看: 401 | 回复: 1 | |||
snowrain0913新虫 (初入文坛)
|
[求助]
这篇分子模拟的文章讲的是什么内容？
|
|
Molecular simulations of the solubility of gases in polyethylene below its melting temperature 摘要是： We have employed Monte Carlo simulations in the osmotic ensemble to study the solubility of three different gases (N2, CH4, CO2) in polyethylene. The simulations are performed at temperatures below the polymer melting point. Although under such conditions, polyethylene is in a semicrystalline state, we have used simulation boxes containing only a purely amorphous material. We show that under such circumstances, computed solubilities are 4e5 times larger than experimental data. We therefore introduce an original use of the osmotic ensemble to implicitly account for the effects of the complex morphology of semicrystalline materials on gas solubility. We have made the assumption that i) the network formed by polymer chains trapped between different crystallites and ii) the changes in local density from crystalline regions to purely amorphous regions, may be both represented by an ad-hoc constraint exerted on the amorphous phase. A single constraint value emerges, independent of the gas nature, characteristic of the crystalline degree of the polymer. It is concluded that the role of this constraint is mostly to reproduce the effective density of the permeable phase of the real material, indirectly giving insights into the morphology of a semicrystalline polymer. 看了好几天了 还是不明白 哪位高人指点一下 谢谢 |
回复此楼» 猜你喜欢
生物学学硕求调剂
已经有10人回复
-
上海电力大学材料防护与新材料重点实验室招收调剂研究生（材料、化学、电化学，环境）
已经有4人回复
-
材料学求调剂
已经有6人回复
-
303求调剂
已经有5人回复
-
一志愿武理085500机械专业总分300求调剂
已经有7人回复
-
考研调剂
已经有4人回复
-
281求调剂
已经有4人回复
-
0805 316求调剂
已经有6人回复
-
085601求调剂总分293英一数二
已经有3人回复
-
08工学调剂
已经有17人回复
» 本主题相关商家推荐: (我也要在这里推广)
2楼2011-05-17 19:36:40
