III International Conference

PP-I-22SYNTHESIS OF ETHYLENE-BUTADIENE COPOLYMER WITHTITANIUM/MAGNESIUM CATALYSTSGavrilov Yu.A., Silkina E.N., Gorohova E.V., Urman Ya.G. 1 , Alekseeva S.G. 1N.N. Semenov Institute of Chemical Physics RAN, Moscow, Russia1 Research institute PM, Moscow, RussiaE-mail: katrin@fqdn.ruUltrahigh molecular polyethylene aligned fibers has the unique solidity and deformativeproperties and provides the basis of different antiballistic and constructional compositematerials. Its load factor (σ ρ ) is 3-4 GPa and modulus of elasticity (E) is 100-150 GPa,respectively. Ultrahigh molecular polyethylene copolymer modified materials is of practicalsignificance.Kinetics of copolymerization of ethylene (C2) with 1,3-butadiene (C4), structural andphysical-chemical properties of products are studied.Synthesis and kinetic study of C2 and C4 copolymerization carried out in suspensionconditions with TiCl 4 /MgCl 2 -Al(Et) 3 as catalyst. Synthesis temperature, equilibrium pressureof comonomers and catalytic concentration varied on interval 30-60 o C, C4/C20,032/0,25-0,25/5 atm/atm, 0,5-1,5 g/l, respectively.The relationship between absorption velocity of C2, molecular mass of products andconcentration are studied.The possibility of synthesis of linear ultrahigh molecular ethylene-butadiene copolymerM w =10 6 with content 17.8 C=C/ 1000C double bonds in chain is determined.Using IR and 13 C NMR spectroscopy it was determined that entering of С4 into polymerchain occurs extremely in the case of 1,4-addition of diene. Distribution of comonomers linksagree with block structure of chain. Micro heterogeneity factor B