Molecular orientation behavior of mesomorphic isotactic polypropylene under uniaxial and biaxial deformation

Autor:	Takanobu Kawamura, Koh-hei Nitta, Kazuomi Ishii, Shingo Yoshida
Rok vydání:	2010
Předmět:	Birefringence Materials science Polymers and Plastics Tacticity Orientation (geometry) Materials Chemistry General Chemistry Composite material Deformation (engineering) Necking
Zdroj:	Polymer Engineering & Science. 51:225-231
ISSN:	0032-3888
DOI:	10.1002/pen.21787
Popis:	The molecular orientation behavior of mesomorphic isotactic polypropylene films under biaxial extension was investigated at room temperature. The birefringence was measured not only for drawn films but also simultaneously with biaxial stresses. It was found that there exists a yield point at which the neck is initiated on the biaxial deformed films and necking occurred and propagated in only one stretching direction, resulting in mosaic structures consisting of necked blocks. POLYM. ENG. SCI., 2011. © 2010 Society of Plastics Engineers
Databáze:	OpenAIRE
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