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Gas Permeability of Polyethylene Films Containing Zeolite Powder  

Hwang Sun Woong (Department of Polymer Engineering, The University of Suwon)
Chung Yong-Chan (Department of Chemistry, The University of Suwon)
Chun Byoung Chul (Department of Polymer Engineering, The University of Suwon)
Lee Seong Jae (Department of Polymer Engineering, The University of Suwon)
Publication Information
Polymer(Korea) / v.28, no.5, 2004 , pp. 374-381 More about this Journal
Abstract
Gas permeability of low density polyethylene (LDPE) film containing zeolite powder for $CO_2,\;O_2$ and $N_2$ were investigated. Zeolite powders modified by cations or surfactant were compounded with LDPE to produce $20 wt\%$ masterbatch. After blending the masterbatch with LDPE, zeolite filled films were prepared by the blown film process. Finally, the composite films containing zeolite loadings of 0, 3,5, and $10 wt\%$ were produced. A gas permeability apparatus based on the variable volume principle was designed to analyze the characteristics of films. Experiments showed a general trend that gas permeabilities first decreased and then increased as the zeolite content was increased. Surfactant modified zeolite showed a better interfacial adhesion with the matrix, but the film did not show a discernible difference in gas permeability compared with the other modified films. The difference of temperature dependences in the gas permeabilities of composite films was slightly smaller than that of LDPE film.
Keywords
gas pemeability; low density polyethylene film; zeolite powder; surface modifcation;
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