Dynamic relaxation behaviors of poly( methyl methacrylate)/Ga nanocomposites

被引：2
|
作者：
Zhou Xue-Mao [1 ]
Chen Xiao-Meng [1 ]
Wu Xue-Bang [1 ]
Shui Jia-Peng [1 ]
Zhu Zhen-Gang [1 ]
机构：
[1] Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
来源：
ACTA PHYSICA SINICA | 2011年 / 60卷 / 03期
基金：
中国国家自然科学基金;
关键词：
relative energy dissipation; glass transition; mechanical relaxation; GLASS-TRANSITION; INTERNAL-FRICTION; MECHANICAL SPECTROSCOPY; PRESSURE;
D O I：
10.7498/aps.60.036102
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Two kinds of poly(methyl methacrylate)/gallium (PMMA/Ga) nanocomposites with different Ga contents (11.3% and 13. 5%) were prepared by free radical polymerization. The relaxation dynamics of PMMA/Ga nanocomposite above the glass transition temperature has been investigated by mechanical spectroscopy. It was found that the peak temperatures of a relaxation of the nanocomposites increase with the increasing Ga content, but the peak heights of alpha relaxation decrease. Besides, the composition-dependent dynamics of the alpha' relaxation in PMMA/Ga nanocomposites was also studied.
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页数：7
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