Scaling approach to dilferential swelling of polymer solutions and gels Academic Article uri icon

abstract

  • The failure of the classical theories for swollen polymer networks was clearly demonstrated by recent differential swelling experiments of Gee, Eichinger and McKenna. We introduce a weaker form of the additivity assumption based on the separation of the gel into «solid» -like and «liquid» -like components. Using simple scaling arguments and the assumption that the effective solvent quality for a crosslinked polymer system is worse than for its uncrosslinked counterpart, we predict a similar anomaly of the swelling activity parameter (dilation modulus) in osmotic deswelling experiments in the semi-dilute range of concentration. The relevance to Eichinger's and McKenna's experiments on concentrated systems is discussed

publication date

  • January 1, 1994