PIB Polymerization (IMAGE) University of Pittsburgh Caption Reaction mechanism showing a proton transfer from the superacid catalyst to isobutylene. This is the first step in the PIB polymerization process. Credit Minh Nguyen Vo/Johnson Research Group Usage Restrictions None License Licensed 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.