Investigation of interfacial interaction and structural transition for epoxy/nanotube composites by positron annihilation lifetime spectroscopy

被引：37
|
作者：
Zhou, Wei [1 ]
Wang, Junjun [1 ]
Gong, Zhenli [1 ]
Gong, Jing [1 ]
Qi, Ning [1 ]
Wang, Bo [1 ]
机构：
[1] Wuhan Univ, Dept Phys, Wuhan 430072, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 02期
关键词：
carbon nanotubes; composite material interfaces; polymers; positron annihilation; solid-state phase transformations; FREE-VOLUME;
D O I：
10.1063/1.3067873
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Positron annihilation lifetime spectroscopy was employed to study the effect of amine modification on interfacial interaction and structural transition for epoxy/multiwalled carbon nanotube (MWNT) composites. Temperature dependence of orthopositronium lifetimes suggests that sample with amine-modified MWNTs possesses the highest glass transition temperature compared with unmodified samples and neat epoxy resin, which indicates that stronger interfacial interactions exist between epoxy matrix and amine-modified MWNTs, as a result of the covalent bonds and other weak forces. This is testified by interaction parameter beta calculated in terms of the positron annihilation parameter.
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页数：3
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