Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Permeation Property of Ionomer Film with New Multifunctional Ionic Site

다관능기를 도입한 아이오노머 필름의 기체투과 특성

  • Lee, Bo-Mi (School of Materials Science & Engineering, Engineering Research Institute, i-Cube Center, Gyeongsang National University) ;
  • Jeong, Sam-Bong (School of Materials Science & Engineering, Engineering Research Institute, i-Cube Center, Gyeongsang National University) ;
  • Nam, Sang-Yong (School of Materials Science & Engineering, Engineering Research Institute, i-Cube Center, Gyeongsang National University)
  • 이보미 (경상대학교 나노신소재공학부, 공학연구원, 아이큐브사업단) ;
  • 정삼봉 (경상대학교 나노신소재공학부, 공학연구원, 아이큐브사업단) ;
  • 남상용 (경상대학교 나노신소재공학부, 공학연구원, 아이큐브사업단)
  • Received : 2011.01.31
  • Accepted : 2012.05.07
  • Published : 2012.05.27
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Abstract

Ionomer is a thermoplastic that is composed of covalent bonds and ionic bonds. It is possible to use this material in processes such as injection molding or extrusion molding due to the material's high oil resistance, weatherproof characteristics, and shock resistance. In this study, a new ionomer having a multifunctional group was prepared by a stepwise neutralization system with the addition of acidic and salt additives. In step I, to increase the contents of the multifunctional group and the acid degree in ethylene acrylic acid (EAA), MGA was added to the ionomer resin (EAA). A new ionomer was prepared via the traditional preparation method of the ionic cross-linking process. In step II, metal salt was added to the mixture of EAA and MGA. The extrusion process was performed using a twin extruder (L/D = 40, size : ${\varphi}30$). Ionomer film was prepared for evaluation of gas permeability by using the compression molding process. The degree of neutralized and ionic cross-linked new ionomer was confirmed by FT-IR and XRD analysis. In order to estimate the neutralization of the new ionomer film, various properties such as gas permeation and mechanical properties were measured. The physical strength and anti-scratch property of the new ionomer were improved with increase of the neutralization degree. The gas barrier property of the new ionomer was improved through the introduction of an ionic site. Also, the ionic degree of cross-linking and gas barrier property of the ionomer membrane prepared by stepwise neutralization were increased.

Keywords

References

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