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In situ FTIR spectroscopic study of the regularity bands and partial‐order melts of isotactic poly(propylene)
Author(s) -
Zhu Xinyuan,
Yan Deyue,
Yao Hongxi,
Zhu Pingfang
Publication year - 2000
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(20000401)21:7<354::aid-marc354>3.0.co;2-b
Subject(s) - tacticity , fourier transform infrared spectroscopy , in situ , materials science , order (exchange) , polymer chemistry , fourier transform , polymer , chemistry , physics , composite material , mathematics , optics , organic chemistry , mathematical analysis , polymerization , finance , economics
An experimental method to determine the order degree of isotactic poly(propylene) (iPP) via regularity bands was developed using fast heating Fourier transform infrared spectroscopy. The various regularity bands can be rearranged in terms of the order degree from high to low: 940, 1 220, 1 167, 1 303, 1 330, 841, 998, 900, 808, 1 100 and 973 cm –1 . When the crystalline iPP melts, partially ordered melt is formed. With a decreasing degree of order of the partially ordered melt, the crystallization peak shifts to lower temperatures and the exothermal enthalpy becomes larger.