TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The composition further comprises: at least one coupling agent; a complementary polymer other than a tackifying resin; and at least one additional component comprising crosslinking agents, UV absorbents, mineral fillers, plasticizers, dyes, optical brighteners and flame retardant agents. The composition is nanostructured. Preferred Components: The polyamide graft polymer comprises 15-30 mass% of polyamide grafts. The flowing temperature of the polyamide graft polymer is the melting temperature or the glass transition temperature of polyamide graft. The flowing temperature of the polyamide graft polymer is 115-160 degrees C, or 75-115 degrees C, preferably 85-115 degrees C. In the composition, the transmission of the wave is greater than or equal to 80% and/or disturbance level is less than or equal to 10% measured according to standard ASTM D1003, for a film having a thickness of 500 mu m and an electromagnetic wave of 400 to 700 nm. The molar mass number of polyamide grafts is 1000-5000 g/mol, preferably 2000-3000 g/mol-1. The polyamide grafts comprise at least one copolyamide. The polyolefin trunk has no melting point or a melting temperature of less than or equal to 100 degrees C. The number of monomer (X) fixed on the polyolefin trunk is greater than or equal to 1.3 and/or less than or equal to 10. The monomer (X) is maleic anhydride. The polyolefin trunk is a copolymer comprising monomer (X). The copolymer is an alkyl ethylene-methacrylate copolymer comprising monomer (X). The ends of polyamide graft are one of amine functions. The other polymer is miscible or partially miscible with the polyamide grafted polymer. The polyamide graft polymer is present at 75 mass%. The structure has a thickness of 5 mu m to 2 mm. In multilayer structure, the support is constituted of glass, polymer, preferably poly(methyl methacrylate), metal or any type of photovoltaic sensors. EXAMPLE - Typical composition comprised (in mass%) of: Lotader 7500 (RTM: Ethylene, ethyl acrylate (17.5 wt.%) and maleic anhydride (2.8 wt.%)) (0.8); and polyamide 6/12 (copolyamide of caprolactam (20 wt.%) and lauryllactam (80 wt.%)) (0.2).