Normal vibrations and their dispersion in syndiotactic polystyrene
作者:
Shantanu Rastogi,
V.D. Gupta,
期刊:
Journal of Macromolecular Science, Part B
(Taylor Available online 1994)
卷期:
Volume 33,
issue 2
页码: 129-141
ISSN:0022-2348
年代: 1994
DOI:10.1080/00222349408248083
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Normal modes and their dispersion are obtained for syndiotactic polystyrene (sPS) in the planar zigzag and s(2/1)2 helical conformations. Comparison is made with the spectra of isotactic polystyrene (ips) to identify the conformation-sensitive modes; for example, the 1221 cm−1mode is identified as a skeletal mode sensitive to chain structure and it also shows maximum dispersion. Bunching of dispersion curves and their intersection are among the characteristic features which are discussed. A check on the dispersion curves below 400 cm−1is made from the spectra of polystyrene oligomers.
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