• Gas resistive sensors
• Functionalized polyketone
• Chemiresistor
• Graphene nanocomposites

Polyketones are a well-known class of polymeric materials that can be easily modified thanks to the presence of carbonyl groups along their polymeric backbone. In this study a polyketone copolymer composed of 50% of CO and 50% of propylene units (PK0) was used to be functionalized with four different amino compounds (1,2-diaminopopane, ethanolamine, 2-ethylhexylamine, 9-anthracenemethanamine). The four functionalized polyketones were characterized by spectrometric and DSC analyses to confirm their functionalization. Studies and challenges for the selective detection of gas are increasing due to their extensive applications in many fields, therefore there is a huge demand. The remarkable sensitivity of graphene-based sensors with different VOCs have made the graphene and its derivatives suitable for convenient applications related to the gas/vapor sensing. In this work reduced graphene oxide (rGO) with different reduction degree were used as a sensing material for the fabrication of an amine sensor. To make a versatile sensing material, a polyketone/rGO nanocomposite was synthetized. The polyketone matrix provide the stability of the real sensing material (graphene) and can enhance or, contrarily, reduce its sensibility, depending on the type of interaction that is established between the two. The PKs/rGO dispersions were thermally and electrically characterized to establish which graphene reduction degree and which PK/rGO dispersion were the most appropriate to have better sensor sensitivity. The sensing performances are preliminary and therefore need to be studied in depth in future studies.