期刊
APPLIED PHYSICS LETTERS
卷 99, 期 12, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3640479
关键词
-
资金
- National Natural Science Foundation of China [50873070]
In this letter, we report the first study of the molecular relaxation dynamics in the glass-rubber transition region in polyisobutylene by 2D correlation dielectric relaxation spectroscopy (2DC-DRS). With the help of the high resolution and high sensitivity of 2DC-DRS, it is also the first time to observe and locate the positions of the Rouse modes and sub-Rouse modes in type-B polymers in the dielectric spectrum. 2DC-DRS was also applied to compare the temperature dependences of different molecular motions. Moreover, 2DC-DRS has been demonstrated as a powerful tool for studying the molecular motions with different time/length scales. (C) 2011 American Institute of Physics. [doi:10.1063/1.3640479]
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