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

폴리(비닐 알코올)과 폴리(아크릴산-말레산) 공중합체의 블렌드 필름 (I) : 열적-기계적 성질 및 가스 투과도

  • 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)
  • 함신균 (금오공과대학교 고분자공학과) ;
  • 정민혜 (금오공과대학교 고분자공학과) ;
  • 장진해 (금오공과대학교 고분자공학과)
  • Published : 2006.07.01

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.

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