Abstract
Permeability of N2 gas through partly dichlorocyclopropanated and vulcanized polybutadienes was studied. cis-1,4-Polybutadiene was modified with dichlorocarbene which was generated by the reaction of CHCl3 with aqueous NaOH solution in the presence ofa phase transfer catalyst. A series of modified polymers containing dichlorocyclopropane rings in the main chain were produced and pressed into plane membranes in the presence of vulcanizing agent. Permeability of N2 gas through these cured membranes with reacted double bonds decreased in a logarithmic fashion in proportion to the amount of dichlorocyclopropane rings partly introduced in the polybutadiene. Increase in a glass transition temperature of the dichlorocarbene-modified polymers corresponded to a decrease in permeability. The low permeability of the modified polymers are attributed to low internal mobility of the polymer chains and to an increase in the density of the modified polymers.
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Hayashi, O., Takahashi, T., Matsumoto, Y. et al. Permeability of Nitrogen Gas through Chemically Modified and Vulcanized Polybutadiene. Polym J 18, 487–491 (1986). https://doi.org/10.1295/polymj.18.487
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DOI: https://doi.org/10.1295/polymj.18.487