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FTIR spectroscopic studies of isotactic polypropylene films under stress
Institution:2. Department of Medical Microbiology, PGIMER, Chandigarh, India;1. Biomedical Engineering, Engineering & IT, University of Sydney, Australia;2. Cambridge University Engineering Department, Cambridge University, UK;1. Department of Physics, Saint-Petersburg State University, Ulianovskaja 3, 198504 St.Petersburg, Russia;2. Faculty of Chemistry, University of Wroclaw, Joliot Curie 14, 50-383 Wroclaw, Poland;3. Department of Chemistry, University of Antwerp, Groenenborgelaan 171, B-2020 Antwerp, Belgium;1. Kazan State Architect and Civil Engineering University, Zelenaya, 1, Kazan 420043, Russia;2. A.E. Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Science, Arbuzov Str., 8, Kazan 420088, Russia;3. Laboratorie de Chimie de Coordination, CNRS,205 route de Narbonne, 31077 ToulouseCedex 4, France
Abstract:The results of dynamic stressing experiments on isotactic polypropylene film samples with draw ratios (λ) of 5 and 11.7 on the vibrational spectra are measured using FTIR spectroscopy up to a maximum applied stress of 29 kg mm−2. The effects of stressing on the vibrational band wavenumbers are compared with results of previous work and it is concluded that both CC skeletal backbone stretching and helical uncoiling are involved in the mechanism of stressing at the molecular level.
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