Statistical model of the extension of elastomers

A model of a nematic elastomer in the form of a chain whose links are in one of the two possible states is suggested. For such a two-component system an exact expression of the configuration integral with unknown single-particle potentials of mean forces is obtained. Within the framework of the approximation of a self-coordinated field, physically justified approximations that allowed one to calculate the extension curves at different temperatures have been introduced for them.