1. Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
2. College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
3. Department of Materials Science and Engineering, University of Sheffield, Sheffield, S1 3JD, United Kingdom
4. State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China
5. Max-Planck Institute for Polymer Research, 55128 Mainz, Germany