The Definition and Measurement of Evolutionary Materials

In this article the authors provide a quantitative definition of evolutionary materials using some different parameters. Attention has been paid about this question, from a technical, commercial and political point of view, but quantitative parameters have never been utilized. Our proposal, based on previous research work, takes into consideration eight main economic parameters covering the various aspects of evolutionary materials, in order to formulate a global index representing a synthetic measurement of the degree of evolution of different materials. Four real cases are cited showing the real differences. Technical data are not used here because, even though they may be easily quantifiable, they cannot be considered specific for commodities and evolutionary respectively