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Effect of Transesterification on the Characteristics of PET/PEN Blend Flexible Substrate  

Kim, Jae-Hyun (Center for Photofunctional Energy Materials, Dept. of Polymer Science and Engineering, Dankook University)
Kim, Whan-Ki (Center for Photofunctional Energy Materials, Dept. of Polymer Science and Engineering, Dankook University)
Yum, Ju-Sun (Center for Photofunctional Energy Materials, Dept. of Polymer Science and Engineering, Dankook University)
Kang, Ho-Jong (Center for Photofunctional Energy Materials, Dept. of Polymer Science and Engineering, Dankook University)
Publication Information
Polymer(Korea) / v.35, no.3, 2011 , pp. 249-253 More about this Journal
Abstract
The effect of morphological development in PET/PEN blending on the physical properties of PET/PEN blend film as a flexible substrate was investigated. The two phase morphology was obtained in PET/PEN blends and it caused the improvement of dimensional stability of PET/PEN blend as a flexible substrate. The two phase morphology and crystallinity of PET/PEN blends could be controlled by the transesterification between PET and PEN during the film processing and this macroscopic structural development affected the dimensional stability of PET/PEN blend films. Better dimensional stability was obtained with increasing crystallinity and decreasing the level of transesterification.
Keywords
poly (ethylene terephthalate)/poly (ethylene naphthalate) blend; transesterification; crystallinity; flexible substrate; coefficient of thermal expansion;
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