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邻苯二甲酸二甲酯系材料中α-弛豫的降温介电谱测量与分析
引用本文:卫来,周兰兰,鹿桂花,张文,张武智,张尚,冯永红,周恒为,张晋鲁,黄以能.邻苯二甲酸二甲酯系材料中α-弛豫的降温介电谱测量与分析[J].物理学报,2012,61(1):17701-017701.
作者姓名:卫来  周兰兰  鹿桂花  张文  张武智  张尚  冯永红  周恒为  张晋鲁  黄以能
作者单位:1. 伊犁师范学院物理科学与技术学院, 新疆凝聚态相变与微结构实验室, 伊宁 835000; 2. 南京大学物理学院固体微结构实验室, 南京 210093
基金项目:国家自然科学基金(批准号: 10774064, 30860076)、 新疆自治区教育厅重点基金 (批准号: XJEDU2007137)和新疆自治区科技厅自然基金(批准号: 200821104, 200821184)资助的课题.
摘    要:对邻苯二甲酸二甲酯(dimethyl phthalate)、邻苯二甲酸二乙酯(diethyl phthalate)、邻苯二甲酸二丁酯(dibutyl phthalate)和邻苯二甲酸二异辛酯 (dioctyl phthalate)系列材料中, α-弛豫的降温介电谱进行了测量, 得出了相应材料α-弛豫的平均弛豫时间ταa 随温度T的变化关系. 通过ταa 的实验结果与经验的Vogel-Fulcher-Tammann)定律ταa = τα0 exp (A/(T-T0))的拟合, 获得了上述系列材料的τα0, A和T0. 分析发现, 随邻苯二甲酸二甲酯系列分子侧链中碳原子数目n的变化, 材料的τα0, A, T0 和Tg 表现出一定的规律性, 具体为随n的增加, 即分子内部自由度的增多, A和Tg 都表现出近乎相同的先减后再增的趋势, 而1/τα0 和T0 则表现出基本相同的先快速减小, 然后保持基本上不变的趋势. 关键词: 玻璃化转变 介电谱 α-弛豫')" href="#">α-弛豫 邻苯二甲酸二甲酯系列材料

关 键 词:玻璃化转变  介电谱  α-弛豫  邻苯二甲酸二甲酯系列材料
收稿时间:2010-07-14
修稿时间:4/8/2011 12:00:00 AM

Measuring and analyzing the cooling dielectric spectra of the cx-relaxation in dimethyl phthalate series materials
Wei Lai,Zhou Lan-Lan,Lu Gui-Hu,Zhang Wen,Zhang Wu-Zhi,Zhang Shang,Feng Yong-Hong,Zhou Heng-Wei,Zhang Jin-Lu and Huang Yi-Neng.Measuring and analyzing the cooling dielectric spectra of the cx-relaxation in dimethyl phthalate series materials[J].Acta Physica Sinica,2012,61(1):17701-017701.
Authors:Wei Lai  Zhou Lan-Lan  Lu Gui-Hu  Zhang Wen  Zhang Wu-Zhi  Zhang Shang  Feng Yong-Hong  Zhou Heng-Wei  Zhang Jin-Lu and Huang Yi-Neng
Institution:Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matters, and College of Physical Science Technology, Ili Normal University, Yining 835000, China;Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matters, and College of Physical Science Technology, Ili Normal University, Yining 835000, China;Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matters, and College of Physical Science Technology, Ili Normal University, Yining 835000, China;Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matters, and College of Physical Science Technology, Ili Normal University, Yining 835000, China;Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matters, and College of Physical Science Technology, Ili Normal University, Yining 835000, China;Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matters, and College of Physical Science Technology, Ili Normal University, Yining 835000, China;Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matters, and College of Physical Science Technology, Ili Normal University, Yining 835000, China;Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matters, and College of Physical Science Technology, Ili Normal University, Yining 835000, China;Department of Physics and National Laboratory of Solid State Microstructures, Nanjin;Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matters, and College of Physical Science Technology, Ili Normal University, Yining 835000, China;Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matters, and College of Physical Science Technology, Ili Normal University, Yining 835000, China;Department of Physics and National Laboratory of Solid State Microstructures, Nanjin
Abstract:The cooling dielectric spectra of the a-relaxation in dimethyl phthalate,diethyl phthalate,dibutyl phthalate,and dioctyl phthalate series materials are measured,and the average relaxation time of theα-relaxationταa as a function of temperature T is obtained.By fitting theταa data to the empirical Vogel-Fulcher-Tammann lawταaα0 exp(A/(T-T0)),the values ofτα0,A and T0 of the series materials are obtained.The results ofτα0,A,T0 and Tg show some variation regularities with the carbon number n in the side-group of dimethyl phthalate series molecules.And specifically,with the increase of n,the internal degrees of freedoms of the molecules,A and Tg indicate almost the same tendencies,i.e.first coming down and then going up,while l/τα0 and T0 have quite similar behaviors,i.e. first reducing rapidly and then keeping at near constant values.
Keywords:glass transition  dielectric spectra  a-relaxation  dimethyl phthalate series
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