• nylon;
  • montmorillonite;
  • composites;
  • gas permeation;
  • degradation


Nylon/clay nanocomposites are expected materials for the great improvement of various properties with small percent addition of clay; however, the degradation behavior and the long term stability of nanocomposites have been insufficiently studied. During the thermal aging in air atmosphere, Nylon is ordinarily affected by oxygen gas; therefore, the oxygen permeation under thermal aging condition is an important factor for considering the thermal degradation of Nylon. Moreover, to examine the relationship between the thermal degradation and the oxygen permeation, the oxygen permeation should be measured at the temperature higher than the temperature of respective Tg. According to the oxygen permeation measurement at the temperature of 65°C, the Nylon-6/MMT nanocomposites indicate lower permeability coefficient than that of neat Nylon-6 and Nylon-6/MMT composites. On the other hand, the solubility coefficients of the MMT contained Nylon-6 were similar to each other and the solubility coefficients were significantly higher than that of the neat Nylon-6. This characteristic is presumable to be closely related with the thermal degradation of Nylon-6. In case of the MMT contained Nylon-6, the permeation of oxygen gas is slower than the case of neat Nylon-6; however, it is conceivable that the oxygen gas permeates with some interactive influences on Nylon-6 matrix. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010