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October 17, 2006; 103 (42)

Cover illustration

Cover image expansion

Cover image: Transmission electron microscope image (simulated color) of syndiotactic polypropylene-block-poly(ethylene-co-propylene)-block-syndiotactic polypropylene triblock copolymer (synTB). This copolymer has a microphase-separated morphology consisting of polypropylene cylinders (red/orange/yellow) in a poly(ethylene-co-propylene) matrix (purple). Triblock copolymers, such as this one, show considerable potential as thermoplastic elastomers. See the article by Hotta et al. on pages 15327–15332. Image courtesy of Vikram Khanna and Janne Ruokolainen.

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