Functional Material : Functional materials have an in-built special effect with physical responses to external forces, for instance light emission on the application of pressure. Compare with structural material
The Association of Petrochemicals Producers in Europe (APPE), The European petrochemical industry, Glossary of Terms on Chemical Safety for Use in IPCS Publications, van Nieuwenhuyse, Brussels 2006. http://www.petrochemistry.eu/glossary.html, (Petrochem Ind - Brit) {473}