Investigation of a rheo-optical method for determining the in-situ molecular orientation behavior in stretching films under biaxial deformation

Autor:	Koh-hei Nitta, Shingo Yoshida, Takayuki Sawada, Takanobu Kawamura
Rok vydání:	2011
Předmět:	Materials science Polymers and Plastics Infrared business.industry Organic Chemistry Infrared spectroscopy Dichroic glass Amorphous solid Stress (mechanics) Optics Tacticity Orientation (geometry) Composite material Deformation (engineering) business
Zdroj:	Polymer Testing. 30:893-898
ISSN:	0142-9418
DOI:	10.1016/j.polymertesting.2011.05.009
Popis:	We have developed a novel polarized infrared spectroscopy method for estimating the in-situ molecular orientation during the stretching of films under uniaxial and biaxial deformation. Isotactic polypropylene films were deformed at 110−160 °C in biaxial stretching mode. This method enabled us to provide the orientation functions of the crystalline and amorphous regions obtained from the dichroic infrared ratios as a function of strain or elongation time. The behavior of the orientation function was found to be almost independent of the stretching temperature, and the dominant factor for determining the chain orientation state was the strain rather than the stress.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::25033e8c137259eb43388760acf17cd0 https://doi.org/10.1016/j.polymertesting.2011.05.009 Zobrazit plný text záznamu Full Text from ScienceDirect