Synthesis of LLDPE from Ethylene by Tandem Action of CrCl3/SNS and Cr/Nanosilica Catalysts

Ethylene-1-hexene copolymers were synthesized with a tandem catalysis system consisting of trimerization catalyst (1), bis(2-pentylsulfanylethyl)amine-CrCl3 , and Phillips polymerization catalyst (2). Catalyst 2 was supported on silica Grace 643 particles. The tandem action was carried out at ethylene pressure 23 bar, temperature of 90°C and in the presence of methylaluminoxane (MAO) as a cocatalyst. DSC curve shows the decrease in the crystalinity of the structure which revealed the copolymer formation. 1HNMR analysis has shown that the synthesized polymer was branched

Keywords:

Ethylene , Trimerization , 1-Hexene , Phillips catalyst , Tandem , LLDPE