The HSP results suggested that P3HT and both PBS elastomers are deemed miscible, yet upon blending P3HT into the PBS elastomers, it became apparent that phase separation was unavoidable when blending more than 1 wt% P3HT in PBS. From the DSC measurements however, 1 wt% P3HT in HPBS blended well in the microstructure, made apparent by no appearance of a P3HT Tc which indicated no P3HT crystallite phases present. On the other hand, phase separation between P3HT in LPBS led to a clear Tc in the DSC due to a lower miscibility between the two components. The mechanical properties of each elastomer where not drastically altered upon introducing 0.1 wt% P3HT as seen by the similar τ however, >0.5 wt% P3HT the blends showed longer τ. Also, the double log plot of tan δ vs frequency showed that the increase in P3HT content disrupted the supramolecular structure of LPBS and HPBS differently. The study underscores that blending a conjugated polymer with a viscoelastomer is more complex than initially anticipated. The delicate supramolecular interactions responsible for the viscoelastomer's mechanical properties can be disrupted even by incorporating small amounts of conjugated polymer.