Free Volumes in Polymer Nanocomposites

摘要：

We have employed positron annihilation lifetime spectroscopy to measure the free volumes in nanocomposites of polystyrene with addition of carbon nanofiber (CNF) and carbon dioxide as a function of composition and of temperature. We found that the glass transition temperature (Tg) increases as a function of CNF compositions but significantly decreases as the exposure of CO2. We also investigate the combination effect of CNF and CO2 and found that the CO2 significantly weakens the bonding between PS and CNF interfaces. The Tg changes are compared with DSC.

关键词： Positron nanocomposite glass transition temperature polystyrene carbon nanofiber

作者: H.M.Chen L.James Lee Jintao Yang Xiaohong Gu Y.C.Jean

作者单位: Department of Chemistry,University of Missouri-Kansas City,Kansas City,Missouri,64110,USA Department of Chemical and Biomolecular Engineering,The Ohio State University,Columbus,Ohio 43210,US Department of Chemistry,University of Missouri-Kansas City,Kansas City,Missouri,64110,USA;Materials

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: 177-179

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）