|
|||||
|
|
Local and Collective Motions in Precise Polyolefins with Alkyl Branches: A Combination of 2H and 13C Solid‐State NMR Spectroscopy |
|
| Authors: | Yuying Wei Robert Graf Dr. John C. Sworen Dr. Chi‐Yuan Cheng Dr. Clifford R. Bowers Prof. Dr. Kenneth B. Wagener Prof. Dr. Hans Wolfgang Spiess Prof. Dr. |
| Affiliation: | 1. Chemistry Department, University of Florida, Gainesville, FL 32611‐7200 (USA);2. Max‐Planck‐Institute for Polymer Research, Ackermannweg 10, 55128 Mainz (Germany) |
| Abstract: | Branching out : The mobility of linear polymers changes upon branching, which has a pronounced effect on processability and drawability. Regularly branched model polyolefins were studied by advanced solid‐state NMR spectroscopy, and twist defects around the branches in the crystalline regions are identified. For lower branch content, the twisting motions are decoupled; for higher content, collective motion is found (see picture).  |
| Keywords: | defects molecular dynamics NMR spectroscopy polymer branching polyolefins |