... Composites Epoxy resins Dynamic mechanical analysis Scanning electron microscopy In this investigation, synthesis and physicochemical characterisations of EPN resins with different stoichiometric ratios and their effects on thermomechanical and morphological properties were studied...

... was conducted in Finnish climatic conditions for one year. The colour of the composites was determined with a spectrophotometer, the morphology of the composite surface was analysed by scanning electron microscopy (SEM), and the changes in the polymer structure in surface layer of the composites were analysed...