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Blend Films of Poly(acrylic acid-co-maleic acid) with Poly(vinyl alcohol) (I) : Thermo-mechanical Properties and Gas Permeability  

Ham Shin-Kyun (Department of Polymer Science and Engineering, Kumoh National Institute of Technology)
Jung Min-Hye (Department of Polymer Science and Engineering, Kumoh National Institute of Technology)
Chang Jin-Hae (Department of Polymer Science and Engineering, Kumoh National Institute of Technology)
Publication Information
Polymer(Korea) / v.30, no.4, 2006 , pp. 298-304 More about this Journal
Abstract
Blends of poly (acrylic acid-co-maleic acid)(PAM) with poly (vinyl alcohol)(PVA) were obtained by solution blending. The blends were solvent-on to a film to examine thermo-mechanical properties and gas permeability. The transition temperatures $(T_g\;and\;T_m)$ of the blends remained constant regardless of PAM contents. However, the values of enthalpy changes corresponding to melting transition $({\Delta}H_m)$ and initial degradation temperature $({T_D}^i)$ were decreased with increasing PAM content. The values of ultimate strength and initial modulus gave the maximum value at the 12 wt% PAM then decreased with further increase of PAM content up to 15 wt%. To measure the gas permeability of the PVA/PAM blend films, the PVA blend solutions were coated onto both biaxially oriented propylene (BOPP) and poly (ethylene terephthalate)(PET) films. The oxygen transmission rate $(O_2\;TR)$ permeability values mono- tonically decreased with increasing PAM content. However, moisture vapor transmission rate was not affected by PAM content.
Keywords
poly(vinyl alcohol); poly(acrylic acid-co-maleic acid); blend; film;
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