Free Volumes in Polymer Nanocomposites

被引：8

作者：

Chen, H. M. ^{[1
]}

Lee, L. James ^{[2
]}

Yang, Jintao ^{[2
]}

Gu, Xiaohong ^{[1
,3
]}

Jean, Y. C. ^{[1
]}

机构：

[1] Univ Missouri, Dept Chem, Kansas City, MO 64110 USA

[2] Ohio State Univ, Dept Chem & Biomol engn, Columbus, OH 43210 USA

[3] Natl Inst Stand & Technol, Mat & Construct Res Div, Gaithersburg, MD 20899 USA

来源：

POSITRON AND POSITRONIUM CHEMISTRY | 2009年 / 607卷

关键词：

Positron; nanocomposite; glass transition temperature; polystyrene; carbon nanofiber; TEMPERATURE; POLYSTYRENE;

D O I：

10.4028/www.scientific.net/MSF.607.177

中图分类号：

T [工业技术];

学科分类号：

08 ;

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 (T-g) 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 T-g changes are compared with DSC.

引用

页码：177 / +

页数：2

共 11 条

[1] Quantitative equivalence between polymer nanocomposites and thin polymer films [J].