A novel efficient Ti(O-iso-C3H7)(4)-based olefin polymerization catalyst system

作者：Rishina L A^*; Kissin Y V; Lalayan S S; Krasheninnikov V G; Perepelitsina E O; Medintseva T I

来源：Polymer Science - Series B, 2016, 58(2): 152-162.

DOI：10.1134/S1560090416020056

The polymerization of ethylene and propylene and the copolymerization of ethylene and hexene-1 with a Ti(O-iso-Pr)(4)-AlR2Cl/MgBu2 catalyst system have been studied. The advantages of this system over metallocene and postmetallocene catalysts are high activity, low cost, and ease of synthesis. The resulting polymers and copolymers are characterized by a broad molecular-mass distribution, which reflects the heterogeneity of the active sites with respect to kinetic parameters. As a consequence, the ethylene/hexene-1 copolymers exhibit compositional heterogeneity. The active sites of the system produce copolymers with a pronounced tendency toward alternation of monomer units. The propylene polymerization product is mostly amorphous atactic polypropylene.

• 出版日期2016-3