01639nas a2200241   4500008004100000022001400041245017900055210006900234260006800303300001200371490000700383520068300390653001801073653002001091653002101111653002001132653002701152653000801179653002401187100002901211700002501240856013201265       2007                        eng d  a0887-624X00aSynthesis and characterization of poly(higher-alpha-olefin)s with a nickel(alpha-diimine)/methylaluminoxane catalyst system: effect of chain running on the polymer properties0 aSynthesis and characterization of polyhigheralphaolefins with a   a111 RIVER ST, HOBOKEN, NJ 07030 USAbJOHN WILEY & SONS INCcJAN  a191-2100 v453 a<p>Homopolymerization of octadecene-1 at different reaction conditions has been studied. Significant chain running can be seen at higher polymerization temperatures. Interestingly, insertion of octadecene-1 into a sterically hindered nickel-cation/carbon (secondary) bond is observed. The microstructure of the polymer was established using NMR spectroscopy. The effects of chain running on polymer melting, crystallization behavior, and dynamic mechanical thermal properties were studied using DSC and DMTA. The extent of chain running (i.e., 2 omega-, 1,omega-enchainments) decreases with an increase in the carbon number of alpha-olefins. (c) 2006 Wiley Periodicals, Inc.</p>10achain running10aCrystallization10aglass transition10amelt transition10anickel (alpha-diimine)10aNMR10apoly(alpha-olefin)s1 aSubramanyam, Ummadisetty1 aSivaram, Swaminathan  uhttps://library.ncl.res.in/content/synthesis-and-characterization-polyhigher-alpha-olefins-nickelalpha-diiminemethylaluminoxane