报告时间：1月10日13:00-17:30

报告地点：闵行校区生物药学楼树华多功能厅

联系人：魏冬青，徐沁（34204348， This e-mail address is being protected from spambots. You need JavaScript enabled to view it. )

Nick Quirke	Imperial College London	Polyethylene insulators: lessons from nanoscale modeling
赵峰	中国工程物理研究院	流体物理所介绍
陈其峰	中国工程物理研究院	冲击压缩稠密气体状态方程研究进展
姬广富	中国工程物理研究院	冲击加载下含能材料初始分解机理研究进展
孙淮	上海交大化学化工学院	Prediction of solubility parameters for polymers
孙弘	上海交大物理天文系	Extraordinary Strengthening of Nanotwinned Superhard Covalent Solids
魏冬青	上海交大生科院	含碳体系极端条件下的物理与化学

报告摘要1：

Polyethylene insulators: lessons from nanoscale modelling

N. Quirke*

Department of Chemistry, Imperial College, London, UK

This e-mail address is being protected from spambots. You need JavaScript enabled to view it.

Polyethylene is commonly used as an insulator for AC power cables.  However over time it is known to undergo chemical and physical change which can lead to dielectric breakdown. Despite almost eighty years of experimental characterization of its electrical properties, very little is known about the details of the electrical behaviour of this material at the nanoscale yet an understanding of the mechanisms of nanoscale charge trapping and transport  could help in the development of materials with better insulating properties required for the next generation of high voltage AC and DC cables. Molecular simulation techniques provide a unique tool with which to study dielectric processes at the atomic and electronic level. Here we summarise our recent simulation results [1,2,3], elucidating the role of morphology in the trapping of excess electrons.

1)      Y. Wang, D. Mackernan,D. Cubero,D. Coker, N. Quirke, submitted for publication, 2013

2)      Y. Wang , K Wu1, D. Cubero,  and N. Quirke, ‘’Molecular modelling of Polyethylene’’, IEEE Trans (2013, in press)

3)      D. Cubero, N. Quirke , D. F. Coker, ”Electronic transport in disordered n -alkanes: From fluid methane to amorphous polyethylene ”, J. Chem. Phys., Vol. 119, pp. 2669-2679, 2003

*Professor of Chemical Physics at Imperial College London; Fellow of the Royal Society of Chemistry; Chang Jiang Fellow, State Key Lab. of Electrical Insulation and Power Equipment , Xi'an Jiaotong University, Xi'an, Shaanxi