“…At 40 °C (Scheme 16) a polyolefin with M w = 1.2·10 6 g/mol and PDI = 248 was obtained.Increasing the polymerization temperature to 60 °C (Scheme 17) both molecular weight (M w = 9.7·10 5 g/mol) and PDI = 223 decreased. The high molecular weight resins and the decrease of molecular weight with increasing polymerization temperature suggest that the rate of propagation reactions (the activation barrier for propagation is usually low if existent at all)[41,42] are much faster than the rate of termination (the termination reactions are subjected to activation barriers).Scheme 16. HT-GPC profile of polyethylene produced with 29/MAO at 40 °C.…”