Studies of the viscoelastic properties of selected polymer systems by the dynamic mechanical analysis

摘要

The review is presented of authors' research concerning application of DMA method for characterization of four, varied in properties, polymeric systems: (a) poly(vinyl chloride) modified with liquid crystalline products being oligomeric arylesters multisubstituted with chlorine (the effect of chemical structure of modifier on the glass temperature values of modified PVC samples); (b) new dental materials based on monometacrylates of glicols from ethyl to tetraethyl series and three various non-aromatic diisocyanates (determination of crosslinking degree and molecular weights of chain fragments between network points of polymeric methacrylate-urethane systems crosslinked during radical polymerization); (c) polysiloxane compositions used as vibratio damping materials (investigation of changes of storage modulus and loss tangent as functions of strain frequency and temperature); (d) natural bone transplants (investigations as in (c) of frozen and lyophilized bone samples).