The diffusion behaviour of water and HCI solution at different temperatures and concentrations into a modified polyethylene filled with carbon black used for lining ii presented. It has shown the predominant role of nature of environment and carbon black content. In the both environments, an increase of environmental temperature increased the capacity of environmental absorption and the diffusion rate. The lower sorption capacity was observed at 40 and 60 oC while a higher at 80oC in the water. The two-stage diffusion appeared for the case of the corrosive environment.at 80oC. An increase of carbon black loading was increased both diffusion rate and saturation values. Diffusion of the environment into the polymer proposed by the following: environmental molecules diffusing into the polymer matrix through porous syster& were trapped by functional groups on the carbon black surface and polymer molecule chain, and are lmmobilized. This explains the increase of sorption capacity when increase carbon black loading.
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The diffusion behaviour of water and HCI solution at different temperatures and concentrations into a modified polyethylene filled with carbon black used for lining ii presented. It has shown the predominant role of nature of environment and carbon black content. In the both environments, an increase of environmental temperature increased the capacity of environmental absorption and the diffusion rate. The lower sorption capacity was observed at 40 and 60 oC while a higher at 80oC in the water. The two-stage diffusion appeared for the case of the corrosive environment.at 80oC. An increase of carbon black loading was increased both diffusion rate and saturation values. Diffusion of the environment into the polymer proposed by the following: environmental molecules diffusing into the polymer matrix through porous syster& were trapped by functional groups on the carbon black surface and polymer molecule chain, and are lmmobilized. This explains the increase of sorption capacity when increase carbon black loading.
