caa a22 4500 463229568 CHVBK 20180405153237.0 cr unu---uuuuu 170326e20070701xx s 000 0 eng 10.1007/s10853-006-0555-0 doi (NATIONALLICENCE)springer-10.1007/s10853-006-0555-0 Blending and oxygen permeation properties of the blown films of blends of modified polyamide and ethylene vinyl alcohol copolymer with varying vinyl alcohol contents [Elektronische Daten] [Jen-Taut Yeh, Heng-Yi Chen] The oxygen permeation and blending properties of the MPAEVOH blends of modified polyamide (MPA) and ethylene vinyl alcohol copolymer (EVOH) with varying vinyl alcohol contents were systematically investigated in this study. The oxygen permeation rates of EVOH film specimens are dramatically slower than that of the PE specimen and reduce significantly as their vinyl alcohol contents increase. After blending EVOH in MPA resin, the oxygen permeation rates of each MPAEVOH series film specimens reduce significantly as their EVOH and/or vinyl alcohol contents increase, respectively. At some optimum compositions, the oxygen permeation rates of the MPAEVOH film specimens are even lower than that of the pure EVOH film specimen with a vinyl alcohol content of 52wt%. On the other hand, the average radius (R f), volume (V f) of the free-volume-cavities and fractional free-volume (F v) values of each MPAEVOH series specimens reduce significantly as their EVOH and/or vinyl alcohol contents increase. These interesting barrier and free-volume properties of the EVOH and MPAEVOH specimens with varying vinyl alcohol contents were investigated in terms of the intermolecular interaction and/or free-volume properties in the amorphous phases of the EVOH and MPAEVOH specimens obtained in this study. Springer Science+Business Media, LLC, 2007 Yeh Jen-Taut Faculty of Chemistry and Material Science, HuBei University, Wuhan, China aut Chen Heng-Yi Department and Graduate School of Polymer Engineering, National Taiwan University of Science and Technology, 106, Taipei, Taiwan aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/14(2007-07-01), 5742-5751 0022-2461 42:14<5742 2007 42 10853 https://doi.org/10.1007/s10853-006-0555-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0555-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yeh Jen-Taut Faculty of Chemistry and Material Science, HuBei University, Wuhan, China aut NATIONALLICENCE 700 1- Chen Heng-Yi Department and Graduate School of Polymer Engineering, National Taiwan University of Science and Technology, 106, Taipei, Taiwan aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/14(2007-07-01), 5742-5751 0022-2461 42:14<5742 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer