In-situ FTIR spectroscopic study on the conformational change of isotacticpolypropylene upon heating

Authors
Zhu, XY Fang, YP Li, YJ Yan, DY Zhu, PF Lu, QH
Citation
Xy. Zhu et al., In-situ FTIR spectroscopic study on the conformational change of isotacticpolypropylene upon heating, CHEM J CH U, 22(8), 2001, pp. 1425-1427
Citations number
14
Categorie Soggetti
Chemistry
Journal title
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
ISSN journal
02510790 → ACNP
Volume
22
Issue
8
Year of publication
2001
Pages
1425 - 1427
Database
ISI
SICI code
0251-0790(200108)22:8<1425:IFSSOT>2.0.ZU;2-Y
Abstract
The experimental data obtained from fast heating FTIR spectroscopy have con firmed that a conformational change occurs at about 135 degreesC for semicr ystalline iPP. Based on the results of density and WAXD measurements, it ca n be inferred that the conformational change occurring at 135 degreesC come s from the disordering of helical sequences in non-crystalline phase, which is further corroborated by the FTIR study on the chloride polypropylene.