Abstract: The invention relates to the use of at least one polymer comprising a repeating unit of formula (I): in which: X and Y=single bond or linear C1-C50 hydrocarbon group; R1 and R2=H, CN, C(Z)3, CH(Z)2, CH2Z with Z=halogen; NH2, NHR3, NR3R4 with R3, R4=halogen, CH3 or linear or branched, saturated or unsaturated C2-C20 hydrocarbon chain, optionally comprising one or more heteroatoms and/or chemical functions comprising at least one heteroatom; at least one from among R1 and R2 being ?H; or of a composite comprising this polymer and one or more conductive charges, as sensitive material in a sensor for detecting nitro compounds. Applications: Detection of explosives, control/monitoring of atmospheric pollution and of ambient air quality, monitoring of industrial sites.

Abstract: The invention relates to the use of at least one electrically conductive or semiconductive polymer as sensitive material in a resistive or gravimetric sensor intended to detect one or more nitro compounds chosen from the group formed by nitroaromatic compounds, nitromines, nitrosamines and nitric esters. Applications include detecting of explosives, checking and monitoring of atmospheric pollution and the quality of the ambient air in relatively confined spaces, monitoring of industrial sites that manufacture, store and/or handle nitro compounds.

Abstract: The invention relates to the use of at least one polymer comprising a repeating unit of formula (I): in which: X and Y=single bond or linear C1-C50 hydrocarbon group; R1 and R2=H, CN, C(Z)3, CH(Z)2, CH2Z with Z=halogen; NH2, NHR3, NR3R4 with R3, R4=halogen, CH3 or linear or branched, saturated or unsaturated C2-C20 hydrocarbon chain, optionally comprising one or more heteroatoms and/or chemical functions comprising at least one heteroatom; at least one from among R1 and R2 being ?H; or of a composite comprising this polymer and one or more conductive charges, as sensitive material in a sensor for detecting nitro compounds. Applications: Detection of explosives, control/monitoring of atmospheric pollution and of ambient air quality, monitoring of industrial sites.

Abstract: The invention concerns a photopolymerizable composition comprising: at least one epoxyvinylester resin, at least one urethane acrylate resin, at least one organic silicon-free particulate filler having an average particle size less than 10 ?m and a specific surface more than 10 m2/g, at least one photoinidator. Said composition is in particular useful for making dental prosthesis preforms and models.