Solvent fractionation terms Links

Assuming a randomly cross-linked, four-functional network, and including the ionic effects in an apparent xthe swelling ratio depends on the molecular mass of polymer chain between cross-links Me, on the backbone molecular mass Mn, the molar volume Vi of the solvent, and the density po of the unswollen polymer. The volume fraction of monomer i 20 during pol5unerization influences the maximum swelling ratio through the term v i. ... 

Effect of Trapped Cyclics in Networks, if cyclic molecules are present during the end linking of chains, some of them will be trapped because of having been threaded by the linear chains prior to the latter being chemically bonded into the network structure (5,102). The fraction trapped is readily estimated from solvent extraction studies. Some typical results, in terms of the fraction trapped as a function of degree of polymerization of the cyclic (103), showed that, as expected, very small cyclics do not get trapped at all, but almost all of the largest cyclics do. 

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