No abstract

The method for the determination of polymer molecular weight and molecular weight distribution from transient and dynamic viscoelastic properties of a narrow molecular weight distribution linear amorphous polymer with Mw>M, has been discussed in our previous work. In the present work, we discussed the method to calculate the polymer molecular weight and molecular weight distribution from terminal zone of Joss modulus G"(w). The terminal zone of loss modulus G"(w) is separated from the plateau modulus G. 0 and the normalized relaxation time spectrum H(r) is then calculated by using the first approximation formulas ofTschoegl. The polymer molecular weight and molecular weight distribution are then obtained from H(r) by using the same numerical method as was developed in the previous work. The results calculated by this method are in good agreement with those measured from membrane osmometry, light scattering and GPC experiments etc. KEYWORDS Molecular Weight I Relaxation Spectrum I Loss Modulus I