Sample piece of plastic (IMAGE) University of Colorado at Boulder Caption Chemistry chair Wei Zhang (right) and Graduate Research Assistant Zepeng Lei study plastic materials in the Zhang Lab. Credit Patrick Campbell / University of Colorado Boulder Usage Restrictions Please credit License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.