Some Problems of the Free Volume Studies in Porous Polymers Using Positron Annihilation and Auziliary Techniques

摘要：

Membrane materials and polymer sorbents, polymers with highly developed free volume and specific surface, are of great technical importance. Positron annihilation lifetime (PAL) studies of these materials and some additional experiments give a chance to learn about the character of size distributions of elementary free volumes (EFV) of these materials. Particularly to answer the question whether the distributions of o-Ps lifetimes are of Gaussian type, as it is suggested in a number of publications, or they have some asymmetry or even some multi-component character, also to check some ideas on the ways of o-Ps trapping. In this aspect, large scale of o-Ps lifetimes (pore sizes) in these materials is very important, since enables comparison with the results of auxiliary techniques.

关键词： positron annihilation polymer membrane materials sorption thermo-stimulated luminescence molecular dynamic simulation nuclear magnetic resonance inverse gas chromatography thermo-mechanical tests

作者: V.P.Shantarovich V.W.Gustov Yu.P.Yampolskii E.V.Belousova A.V.Polyakova M.K.Filimonov

作者单位: N.N.Semenov Institute of Chemical Physics Russian Academy of Sciences,4 Kosygin st.,119991 Moscow,Ru A.V.Topchiev Institute of Petrochemical Synthesis,Russian Academy of Sciences,29 Leninskii Pr.,11791

会议类型: 国际会议

会议名称: 第九届国际正电子与正电子素国际会议(9th International Workshop on Positron and Positronium Chemistry)(PPC–9)

会议地点: 武汉

会议语种:英文

页码: 155-160

在线出版日期: 2008-05-11（万方平台首次上网日期，不代表论文的发表时间）