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Conformation analysis of freeze‐dried isotactic polystyrene from dilute solutions
Author(s) -
Gu Fangming,
Bao Lirong,
Chen Min,
Bu Haishan
Publication year - 1998
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/(sici)1521-3927(19980701)19:7<367::aid-marc367>3.0.co;2-x
Subject(s) - tacticity , polystyrene , fourier transform infrared spectroscopy , analytical chemistry (journal) , freeze drying , infrared , materials science , infrared spectroscopy , fourier transform , polymer chemistry , chemistry , crystallography , polymer , chromatography , optics , organic chemistry , polymerization , physics , quantum mechanics
Fourier transform infrared spectra of freeze‐dried samples of isotactic polystyrene (i‐PS) from dilute solutions were analyzed. The 698, 1452, 1493 and 1601 cm −1 bands increased in sharpness and intensity as the solution concentration decreased, indicating that the freeze‐dried sample is in a more dilated state. When the freeze‐dried i‐PS was annealed at 100°C, all aforementioned bands broadened and their heights depressed, accompanied with a significant change of the bands at 981 and 906 cm −1 .