ethylene , alpha - olefin , non - conjugated bicyclic diene elastomeric polymers and / or polymer blends when compounded and formed into a calendered sheet , show surprising improvements for the combination in both green strength and peel adhesion in the unvulcanized state . such green strength and peel adhesion provide benefits during calendering operations and subsequent joining of calendered sheets , while the compounded elastomeric polymers are in their green or unvulcanized state .