Influence of Free Volume on Damping Properties for CIIR and CIIR/PEA Investigated by Positron

摘要：

The effect of the free volume on damping properties for CIIR (Chlorinated isoprene-isobutylene rubber) and CIIR/PEA (polyethylacrylate) were investigated by positron annihilation lifetime spectroscopy and DMA, respectively. The DMA results indicate that the tanδ peaks of CIIR and CIIR/PEA both have very broad covering temperature range. The tanδ peak of CIIR/PEA shifts to higher temperature region which indicates that the CIIR/PEA has better damping property in high temperature region that CIIR. From PALS results, we found that the lifetime of o-Ps in CIIR and CIIR/PEA both exhibit broad glass transition. It is interestingly that the glass transition region of CIIR/PEA also shifts to higher temperature than CIIR. This character of the free-volume is well in agreement with the damping properties obtained by DMA. It indicates that the free volume has close relationship with damping mechanism for CIIR and CIIR/PEA.

关键词： free volume damping positron annihilation CIIR CIIR/PEA

作者: Yuchan Zhu Bo Wang Wei Zhou Jinrong Wu Guangsu Huang

作者单位: Department of Physics,Wuhan University,Wuhan,430072,China College of polymer science and polymer materials,Sichuan University,Chengdu,610065,China

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: 91-93

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）