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Conformational development of polylactide films induced by uniaxial drawing
Author(s) -
Oh Mi Ok,
Kim Seong Hun
Publication year - 2014
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4630
Subject(s) - materials science , deformation (meteorology) , composite material , phase (matter) , uniaxial tension , chemistry , ultimate tensile strength , organic chemistry
Abstract Uniaxially drawn polylactide ( PLA ) films were prepared using various draw ratios (2, 3, 4 and 4.5) at a constant draw rate and temperature. It was confirmed that the conformational structure of the PLA films prepared using the uniaxial drawing process was composed of the α ′‐phase form. The conformational structure deformation of α ′‐phase PLA films, according to the various draw ratios used, was investigated in terms of strain‐induced crystalline behavior and molecular orientation analysis. It is of utmost importance to confirm the α ′‐phase structural deformation caused by the uniaxial drawing process because it directly relates to the characteristics of PLA films. The conformational structure deformations of the α ′‐phase, created by uniaxial drawing, led to improved mechanical properties, as evident from mechanical testing and dynamic mechanical analyses results. © 2013 Society of Chemical Industry