Ethylene/1-Octene Copolymerization Characteristics under the Condition of Particle Liquid-Holding
In this work,the effects of different reaction conditions on the ethylene/1-octene copolymerization behavior and polymerization products are studied.The results showed that in the absence of inert condensate,1-octene also played the role of a condensing agent in the copolymerization system,which increased the local concentration of ethylene around the active sites of particles,leading to the increase of polymerization activity with the 1-octene concentration.In the present of inert condensate,the comonomer effect reduced the ethylene insertion rate during the copolymerization reaction.Moreover,as the comonomer concentration increased during the reaction,the 1-octene branch content in the polymerization product was also gradually increased.This was because with the addition of 1-octene,its concentration around the active sites of catalyst was also increased,which enhanced the insertion ratio of 1-octene in the polymerization reaction.By this way,the optimal reaction temperature can be determined.
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