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Improving the barrier character of polylactide/phenoxy immiscible blend using poly(lactide‐ co ‐ɛ‐caprolactone) block copolymer as a compatibilizer
Author(s) -
Sangroniz Ainara,
Chaos Ana,
Garcia Yohana M.,
Fernández Jorge,
Iriarte Marian,
Etxeberria Agustin
Publication year - 2017
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.45396
Subject(s) - materials science , miscibility , copolymer , differential scanning calorimetry , polymer chemistry , glass transition , crystallinity , compatibilization , caprolactone , lactide , oxygen permeability , chemical engineering , polymer blend , composite material , polymer , oxygen , organic chemistry , chemistry , physics , engineering , thermodynamics
The improvement of the barrier character of polylactide by the addition of poly(hydroxy ether) of bisphenol A (Phenoxy) and poly(lactide‐ co ‐ɛ‐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.