Broadband terahertz time-domain spectroscopic study on form II polyvinylidene fluoride

被引：8
|
作者：
Mori, Tatsuya [1 ]
Igawa, Hikaru [1 ]
Okada, Daichi [1 ]
Yamamoto, Yohei [1 ]
Iwamoto, Kei [2 ]
Toyota, Naoki [2 ,3 ]
Kojima, Seiji [1 ]
机构：
[1] Univ Tsukuba, Div Mat Sci, Tsukuba, Ibaraki 3058573, Japan
[2] Tohoku Univ, Grad Sch Sci, Dept Phys, Sendai, Miyagi 9808578, Japan
[3] Ishinomaki Senshu Univ, Dept Basic Sci, Ishinomaki, Miyagi 9868580, Japan
来源：
JOURNAL OF MOLECULAR STRUCTURE | 2015年 / 1090卷
关键词：
PVDF; Broadband terahertz time-domain spectroscopy; Boson peak; Glass transition; 3 CRYSTALLINE FORMS; POLY(VINYLIDENE FLUORIDE); TRANSITION; VIBRATIONS;
D O I：
10.1016/j.molstruc.2014.12.004
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The complex dielectric constant of semicrystalline form II polyvinylidene fluoride (PVDF (II)) in the frequency range from 0.2 to 6.0 THz has been determined by broadband terahertz time-domain spectroscopy (THz-TDS). The obtained dielectric constant consists of superposition of four vibration modes at 1.60, 2.36, 3.04 and 5.31 THz of crystalline part and a broad relaxation mode with center frequency of 0.68 THz which will be attributed to boson peak of amorphous fraction. In addition, the temperature dependence of the dielectric constant has also been measured, and we have determined the glass transition temperature of amorphous fraction of PVDF (II) as about 192 K by analysis of the temperature variation of peak frequency of the lattice vibration mode. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：93 / 97
页数：5
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