A Model for the Blends

We have proposed the use of a quadratic blending law of the double reptation type to express the viscoelastic behavior of [SIS-SI] blends based on the viscoelastic behavior of the diblock and the (Ptribiock copolymers. It may be expressed as Eq. (15), where triblock is the volume fraction of the triblock copolymer in the [SIS-SI] blend. 

We have already shown [23] that the double reptation law can also reasonably be applied to the complex shear modulus, which simpHfies the calculations by avoiding Fourier transforms from the time domain to the frequency domain. 

In Fig. 16.2, one can observe the good agreement between experimental data and calculations for pure [SIS-SI] blends. 

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