Abstract
AbstractNucleophilic additives and potassium and sodium chlorides, complexing with alkyl aluminum chlorides, are shown to result in an increase in the 1,2 structure of polybutadiene and a sharp decrease in molecular weight and polymerization rate. Trialkyl aluminum behaves in a similar way. There exists a correlation between these effects and the reducing power of the system. A mechanism of the influence of various compounds on the polymerization process is proposed. A mechanism of the formation of 1,4 and 1,2 polymer units is discussed with respect to the role of π‐allylic systems in diene polymerization and the nonequivalence of carbon atoms bonded to metal atoms in π‐crotylic systems.
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