Polyolefin elastomers.

Edward Kramer and Glenn Fredrickson,in collaboration with Geoffrey Coates of Cornell and a team at Mitsubishi Chemical,have developed exciting new elastomeric materials based on block copolymers of ethylene and propylene. Imaged by Scanning Electron Microscopy (SEM). [From A. Hotta et al., PNAS (2006) 103, 15327].