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The Study of Water Resistance and Water/Oxygen Barrier Properties of Poly(vinyl alcohol)/Water-soluble Poly(ethylene-co-acrylic acid) Blend Films  

Kim, Eun Ji (Korea Institute of footwear & Leather Technology)
Park, Jae Hyung (Korea Institute of footwear & Leather Technology)
Paik, In Kyu (Korea Institute of footwear & Leather Technology)
Publication Information
Applied Chemistry for Engineering / v.23, no.2, 2012 , pp. 217-221 More about this Journal
Abstract
Blending films having enhanced water-resistance and barrier properties were prepared using the mixtures of poly(vinyl alcohol) (PVA) aqueous solution and poly(ethylene-co-acrylic acid) (EAA) dispersed in water. Thermal-mechanical properties, contact angles, water-vapor transmission rates (WVTR) and oxygen transmission rates $(O_2TR)$ were measured with the content of EAA of blending films, and their water-resistance was evaluated. The tensile strength of the films was found to be $9.16{\sim}11.75\;kg/mm^2$ which showed no significant difference compared with that of PVA, and the hardness increased with the content of EAA. The glass transition temperature and melting temperature of the blending films were slightly improved. The film prepared with PVA/EAA (= 90/10), of which the swelling and solubility were measured to be 109 and 0%, respectively, showed improved water-resistance. The WVTR and $O_2TR$ for the PET film (thickness $50\;{\mu}m$) coated with PVA/EAA (= 90/10) film (thickness $2.5\;{\mu}m$) were measured to be $9.1\;g/m^2/day$ and $2.0\;cc/m^2/day$, respectively.
Keywords
hydrophobicity; poly(vinyl alcohol); poly(ethylene-co-acrylic acid); barrier film;
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