Vitrification absence

On analyzing the M5 reactions involving insoluble polymers, two types of restrictions ould be considered, first, diffusional (transfer of the functional gro ps after the system has crossed a vitrification point) and topological ones (a virtually complete absence of the translational diffusion in these groi grafted onto the polymer backbone). The diffusional process results primarily in the reaction of the surface functional groups therefore, the penetration of the MX into the polymer block is restricted. 

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