Abstract

Some features of the sorption and dissolution of low molecular weight additive in a polymer are discussed on the basis of a model presenting the polymer as a solution of distortion of short-range order in a medium consisting of ideally ordered macromolecules. The calculated theoretical temperature dependence of solubility is compared with experimental findings. To obtain full agreement between theory and experiment one has to take account of phase transitions occurring in the polymer as well as displacement of the latter caused by the plasticizing effect of the dissolved substance.

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