NORMAL-MODE ANALYSIS OF INFRARED AND RAMAN-SPECTRA OF POLY(VINYL FLUORIDE)

被引：22
作者：
HONG, JW
LANDO, JB
KOENIG, JL
CHOUGH, SH
KRIMM, S
机构：
[1] UNIV MICHIGAN,DEPT PHYS,ANN ARBOR,MI 48109
[2] UNIV MICHIGAN,MACROMOLEC RES CTR,ANN ARBOR,MI 48109
来源：
VIBRATIONAL SPECTROSCOPY | 1992年 / 3卷 / 01期
关键词：
INFRARED SPECTROMETRY; RAMAN SPECTROMETRY; 2-FLUOROBUTANE; NORMAL-MODE ANALYSIS; POLY(VINYL FLUORIDE);
D O I：
10.1016/0924-2031(92)85024-U
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Infrared and Raman spectra of samples of poly(vinyl fluoride) (PVF) have been recorded. The vibrational spectra have been analyzed by means of normal-mode calculations. A force field was derived by using 2-fluorobutane as a model compound. Crowder's force field for hydrofluorocarbons was employed as a starting point and subsequently refined in application to secondary fluorides. A planar zigzag, syndiotactic single-chain model of crystalline PVF was submitted to be analyzed by this scheme. A comparison of observed infrared and Raman bands with frequencies calculated for syndiotactic PVF shows that PVF produced by conventional free radical polymerization has an atactic structure, supporting the F-19-NMR results and conclusions reached by Koenig and Boerio. Band assignments in terms of atactic structure are proposed.
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页码：55 / 66
页数：12
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