International audienceElectrically conductive polymer composites have been elaborated by dispersing silver microplates into apolyvinylidene fluoride (PVDF) matrix. Silver microplates have been successfully synthesized. Their meanlateral length is about 1.15 mm, presenting a moderate aspect ratio (12e25). Synthesis is easily controlledand can produce 1e500 mg depending on the volume and the concentration of the solutions used.Electrical bulk and surface conductivity of the composites containing different filler fractions (4e20vol.%) have been determined for each sample. Electrical percolation has been observed for each situationand was determined at 5.9 vol.% for bulk conductivity (through the thickness), while the value is shiftedto 6.9 vol.% when surface conductivity is considered. The gap between the two values of percolationthreshold is attributed to the orientation of fillers. Bulk conductivity and surface resistivity reaches12.9 S m�1 and 0.123 U/☐ respectively at filler fraction of 15 vol.%

New poly(aryl ether ketone)s (PAEKs) with a low melting temperature (relative to PEEK) are of interest in order to simplify the manufacturing of high-performance polymers or composites. In this study, we propose to investigate the physical properties of a new PAEK from Victrex, namely PAEK LM. Combinations of thermal analyses were used as follows: standard and modulated temperature differential scanning calorimetry, dynamic mechanical analysis, dynamic dielectric analysis and guarded hot plate technique. We found that the global mechanical, dielectric and thermal properties are very similar to the PEEK reference. The glass transition temperature was observed in the same range than PEEK (* 150°C) while the melting temperature T m was measured at 307°C for PAEK LM which is about 35°C below the melting temperature of PEEK. The degree of crystallinity of PAEK LM was found to be 27% while for PEEK it is 38%, depending on the processing conditions. This work explored crystalline structure-property relationships to explain the behaviour of PAEK LM.