Abstract
Abstract Two moderately low melting main chain nematic polymers with flexible spacers are investigated (spacers (CH2)7 and (CH2)10). Isothermal evolution in the N+I biphase is considered as an orientational ordering stage followed by macroscopic demixing of the N and I domains and homogenization of their respective chain length distributions. Segregation according to chain length is studied by means of polarizing microscopy and fractionation. A method for delineation of equilibrium biphase width is presented, for masses ranging up to Mn=37,000. Evolution of the gross morphology of the pure nematic and solid phases as a function of thermal history in the biphase is illustrated.
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