Local and Collective Motions in Precise Polyolefins with Alkyl Branches: A Combination of 2H and 13C Solid??State NMR Spectroscopy
Y Wei, R Graf, JC Sworen, CY Cheng…
Index: Wei, Yuying; Sworen, John C.; Cheng, Chi-Yuan; Bowers, Clifford R.; Wagener, Kenneth B.; Graf, Robert; Spiess, Hans Wolfgang Angewandte Chemie, International Edition, 2009 , vol. 48, # 25 p. 4617 - 4620
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Citation Number: 36
Abstract
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).
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