I am trying to simulate a polymer with viscoelastic properties. Related to this, I have the following data,

1. I have the temperature varying material test data (storage modulus, loss modulus and tan delta) at 1Hz frequency.

2. Prony coefficients from a stress relaxation test, and TRS (WLF) fit parameters.

In Abaqus, both elastic and viscoelastic properties need to be supplied for a simulation.

Now my question is, do we need to use 'temperature varying elastic modulus' for the elastic properties? I asked this question because, I believe, the temperature variation of the material is already taken care by the time-temperature-superposition in the WLF fit and the prony coefficients. In such a case, shouldn't the elastic modulus be just one value? (instantaneous or long-term).

Secondly, do we see any difference, if we use long term modulus instead of instantaneous modulus?