Local and Collective Motions in Precise Polyolefins with Alkyl Branches: A Combination of ²H and ¹³C Solid‐State NMR Spectroscopy

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).