| 聚甲基丙烯酸甲酯/镓纳米复合物的动力学弛豫行为 |
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| 引用本文： | 周学懋,陈晓萌,吴学邦,水嘉鹏,朱震刚.聚甲基丙烯酸甲酯/镓纳米复合物的动力学弛豫行为[J].物理学报,2011,60(3):36102-036102. |
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| 作者姓名： | 周学懋 陈晓萌 吴学邦 水嘉鹏 朱震刚 |
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| 作者单位： | 中国科学院固体物理研究所,中国科学院材料物理重点实验室,合肥 230031 |
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| 基金项目： | 国家自然科学基金(批准号:50803066, 10874182和10674135)资助的课题. |
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| 摘 要： | 通过原位自由基聚合方法制备了聚甲基丙烯酸甲酯(PMMA)以及含镓(Ga)质量分数为11.3%和13.5%的PMMA/Ga纳米复合材料.在玻璃化转变温度及以上温区,利用能量耗散技术研究PMMA/Ga纳米复合物的动力学弛豫行为,发现随着Ga含量的增加,复合物的α弛豫峰移向高温但峰高降低.此外,还定量研究了Ga含量对PMMA/Ga复合物的α' 弛豫的影响,并作出了相应的解释.
关键词：
相对能量耗散
玻璃化转变
力学弛豫
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| 关 键 词： | 相对能量耗散 玻璃化转变 力学弛豫 |
| 收稿时间： | 4/7/2010 12:00:00 AM |
| 修稿时间： | 6/2/2010 12:00:00 AM |
Dynamic relaxation behaviors of poly( methyl methacrylate)/Ga nanocomposites |
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| Zhou Xue-Mao,Chen Xiao-Meng,Wu Xue-Bang,Shui Jia-Peng,Zhu Zhen-Gang.Dynamic relaxation behaviors of poly( methyl methacrylate)/Ga nanocomposites[J].Acta Physica Sinica,2011,60(3):36102-036102. |
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| Authors: | Zhou Xue-Mao Chen Xiao-Meng Wu Xue-Bang Shui Jia-Peng Zhu Zhen-Gang |
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| Institution: | Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China |
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| Abstract: | 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 α relaxation of the nanocomposites increase with the increasing Ga content, but the peak heights of α relaxation decrease. Besides, the composition-dependent dynamics of the α' relaxation in PMMA/Ga nanocomposites was also studied. |
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| Keywords: | relative energy dissipation glass transition mechanical relaxation |
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