Flexible electronics are emerging as a research priority as electronic materials are increasingly integrated into wearable devices for bioelectronic monitoring and sensing applications. Semiconducting polymers have recently shown great potential in wearable applications compared to their inorganic counter-parts, due to their chemical tuneability, inherent flexibility and lightweight nature. Semiconducting polymers utilise πconjugation along the polymer backbone to allow delocalised charge carriers to travel between electrodes in a device, however they still exhibit a high elastic modulus when compared to the most flexible parts of skin (MPa vs kPa). Many approaches have been successfully carried out to circumvent this issue, and one proven strategy is blending the semiconducting polymer with an elastomeric polymer that exhibits a lower elastic modulus. Notable examples are blends with polymer systems such as cross-linked poly(dimethylsiloxane) (PDMS), paraffin, poly(methyl methacrylate) PMMA, poly(styrene-ethylene-butylene-styrene) (SEBS), and butyl rubber. The best performing blends, that exhibit high charge carrier mobility when submitted to high strain, show large phase separation due to incompatibility between the two polymer systems. In fact, the phase separation induces the formation of nanoconfined semiconducting polymer that has shown to improve charge transport and device stability. Vertical and lateral phase separation between an organic semiconductor and insulator polymer is also a method researchers use to improve conduction pathways between electrodes in field effect transistors and sensing applications. Furthermore, supramolecular chemistry has been exploited when blending semiconducting polymers and elastomers as these dynamic interactions can assist in strain energy dissipation. Yet, the miscibility between semiconducting polymers and the elastomers that exhibit supramolecular chemistry has not been extensively studied. One polymer of interest that exhibits supramolecular chemistry is the viscoelastomer, polyborosilioxane (PBS) (Figure ). PBS contains a siloxane backbone crosslinked via boron ester groups and its ability to exhibit solidliquid like properties arises from the formation of dynamic boron crosslinking sites. Currently the dynamic bonding mechanism is widely accepted to arise from dative bonds between the empty p-orbital on the B atom and lone pair of electrons on any O atom, however reports of a dynamic covalent bonding system have recently been published. Discussed in detail in the review by Drozdov et al., the dynamic bonding interactions of PBS have enabled its use in applications such as shock protection and rheological fluids. Additionally, recent accounts of blending PBS with electronic materials have enabled its use in sensors and conductors. Therefore, this study aims to widen the breadth of supramolecular polymer blends by showcasing the effects of blending an organic semiconducting polymer with PBS.