Transition phenomena of linear polymers such as polyvinylchloride, low density polyethylene, high density polyethylene and polypropylene manufactured locally were investigated with the Rheovibron Model DDV-II-C. Plasticisers employed, morphology, and molecular characteristics of the polymers gave notable effects and these were discussed using the Zener model. Both the PVC-36 and the linearly oriented PP showed single relaxations in the glass transition. The glass transition and the dynamic storage modulus of the PP at the glassy state were affected mostly by its morphology. In case of the PVC-52, remarkable phase separation was observed beyond the peak temperature of the glass transition. The β relaxation seems to be as much important as the γ relaxation for the LDPE, but the WLF eguation could not be employed for the analysis. The equation could be used for the linearized HDPE E 308 and the relationship
logα（T） = -0.71(T-T_g)/(T-T_g+17.41)
was established accordingly.