02127nas a2200229   4500008004100000022001400041245016000055210006900215260006800284300001400352490000700366520120600373653002201579653001901601653002901620653001301649653002201662653002701684100002901711700002501740856013201765       2007                        eng d  a0887-624X00aKinetics of hexene-1 polymerization using [(N,N `-diisopropylbenzene)-2,3-(1,8-napthyl)-1,4-diazabutadiene] dibromonickel/methylaluminoxane catalyst system0 aKinetics of hexene1 polymerization using NN diisopropylbenzene23  a111 RIVER ST, HOBOKEN, NJ 07030 USAbJOHN WILEY & SONS INCcMAR  a1093-11000 v453 a<p>{Kinetics of hexene-1 polymerization was investigated using [(N,N'-diiso-propylbenzene)2,3-(1,8-napthly)-1,4-diazabutadiene]/dibro monickel/methylaluminoxane catalyst. Experiments were performed at varying catalyst and monomer concentrations in the temperature range of -10 to 35 degrees C. First order time-conversion plot shows a downward curvature at temperatures of 20 degrees C and 35 degrees C indicating the presence of finite termination reactions. A nonlinear plot of degree of polymerization (P-n) with respect to conversion indicates occurrence of transfer reactions and slow initiation. The experimental molar masses are higher than predicted, which implies that a fraction of catalyst species could not be activated or is deactivated at the early stages of the reactions. The efficiency of the catalyst (Cat(eff)) varies from 0.77 to 0.89. The observed polydispersity of the poly(hexene-1) s is in the range of 1.18-1.48. The reaction order was found to be 1.11 with respect to catalyst. The Arrhenius plot obtained using the overall propagation rate constant, k(p), at five different temperatures (-10, 0, 10, 20, and 35 degrees C) was found to be linear with an activation energy</p>10aActivation energy10achain transfer10adegree of polymerization10ahexene-110akinetics (polym.)10anickel (alpha-diimine)1 aSubramanyam, Ummadisetty1 aSivaram, Swaminathan  uhttps://library.ncl.res.in/content/kinetics-hexene-1-polymerization-using-nn-diisopropylbenzene-23-18-napthyl-14-diazabutadiene