SOME RELEVANT PARAMETERS ON THE JACKETED EFFECT IN SIDE-ON FIXED POLYSILOXANES

New 'side-on' attached liquid crystal polysiloxanes have been synthesi zed with different fixation rations of side groups and various degrees of polymerization. For these syntheses, a series of random copoly(hyd rogemethyl-dimethysiloxane)s, used a precursors, has been realized. Bo th thermal properties and small angle neutron scattering experiments o n these polymers show a decrease in the nematic 'jacketed' effect as t he number of mesogenic groups fixed to the backbone decreases and as t he main chain length increases.