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Orientated crystallization in drawn thermoplastic polyimide modified by carbon nanofibers
Author(s) -
Smirnova Valentina E.,
Gofman Iosif V.,
Yudin Vladimir E.,
Dobrovolskaya Irina P.,
Shumakov Alexander N.,
Didenko Andrey L.,
Svetlichnyi Valentine M.,
Wachtel Ellen,
Shechter Rinat,
Harel Hannah,
Marom Gad
Publication year - 2009
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.21241
Subject(s) - materials science , polyimide , composite material , lamellar structure , crystallization , mesophase , thermoplastic , modulus , chemical engineering , layer (electronics) , liquid crystal , optoelectronics , engineering
The solid state crystallization in drawn thermoplastic polyimide films is studied as a function of draw ratio (DR) under the effect of vapor grown carbon fiber nanoinclusions. The nucleating effect of the nanoinclusions coupled with the orientation effect of drawing generates a unique orientated layered lamellar structure, characteristic of smectic‐like mesophase. The degree of draw induced orientated crystallization increases with the content of nanoinclusions and with the DR, and is reflected in the mechanical behavior of the film. Generally, the Young's modulus and the yield point of the drawn crystalline films in the drawing direction are significantly higher compared with the noncrystalline counterparts. POLYM. ENG. SCI., 2009. © 2008 Society of Plastics Engineers