The Swelling of Nonuniformly Crosslinked Polymers in Solvents
The mechanics of swelling of a heterogeneously crosslinked polymer is considered by means of a model consisting of a spherical core of a highly crosslinked material within a shell of a lower degree of crosslinking. Use is made of the equations relating the stresses developed in each of the parts with the relevant extension ratios and the strain energy function, in order to determine the stress distributions. The dependence of the strain energy function on the first and third invariants of the extension ratios is discussed and derived for a swollen, crosslinked elastomer.
KeywordsNatural Rubber Crosslink Density Strain Energy Function Alkyd Resin Extension Ratio
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