Improving the barrier character of polylactide/phenoxy immiscible blend using poly(lactide‐co‐ɛ‐caprolactone) block copolymer as a compatibilizer |
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| Authors: | Ainara Sangroniz Ana Chaos Yohana M Garcia Jorge Fernández Marian Iriarte Agustin Etxeberria |
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| Affiliation: | 1. Department of Polymer Science and Technology, POLYMAT, Faculty of Chemistry, University of the Basque Country UPV/EHU, Donostia, Spain;2. Department of Mining‐Metallurgy Engineering and Materials Science, POLYMAT University of the Basque Country UPV/EHU, Bilbao, Spain |
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| Abstract: | The improvement of the barrier character of polylactide by the addition of poly(hydroxy ether) of bisphenol A (Phenoxy) and poly(lactide‐co ‐?‐caprolactone) copolymer that acts as a compatibilizer is studied. First, differential scanning calorimetry, Fourier transformed infrared spectroscopy, and scanning electron microscopy show that the addition of the copolymer allows to obtain a miscible ternary system. The permeability of polylactide to water vapor, oxygen, and carbon dioxide is enhanced with the addition of phenoxy but better improvement in its barrier character is obtained with the addition of the compatibilizer. The effects of different factors such as miscibility, glass transition temperature, and crystallinity on the transport properties are analyzed. Several permeability prediction models for heterogeneous systems have been applied obtaining quite good results for water vapor and oxygen permeability. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45396. |
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| Keywords: | biopolymers and renewable polymers compatibilization differential scanning calorimetry (DSC) packaging phase behavior |
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