Chain Dynamics in Pores Artificial Tubes

The tube introduced in the frame of the Doi/Edwards reptation model for the treatment of bulk systems of entangled polymers is a fictitious one. As outlined above, the laws predicted on this basis (see Table 1) can provide only a rather crude picture failing to account for numerous experimental findings quantitatively as well as qualitatively. It may therefore be helpful to study chain dynamics in tube-hke pores of a physically real nature. 

A more direct verification of tube/reptation features was possible with systems where the soHd matrix and the mobile polymer chains confined to nanopores are of similar organic chemical composition. In the experiments referred to in the following, Hnear polymers were confined in a solid, that is strongly cross-linked, polymer environment. Under such conditions, the geometry effect can be expected to dominate whereas the wall adsorption phenomenon is of neghgible influence. 

This sort of system was prepared in the form of so-called semiinterpene-trating networks. Preparation details are described in Ref. [184]. The matrix 

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