Abstract
Polar groups are introduced into polyolefin chains via the postpolymerization polymer-analogous transformations using the ozonolysis of side ethylidene groups of ethylene (propylene) copolymers with the cyclic comonomer 5-ethylidene-2-norbornene. The copolymers are synthesized using ansa-zirconocene catalysts Me2Si[Ind]2ZrCl2/MAO, Et[Ind]2ZrCl2/MAO and Et[IndH4]2ZrCl2/MAO, which provide insersion of the cyclic monomer into the polymer chain without ring opening. The study of number-average molecular mass and compositions of homo- and copolymers of ethylene and propylene with 5-ethylidene-2-norbornene confirms a high selectivity of the ozonolysis of unsaturated double bonds of polyolefins. The formation of polar groups in the ozonized ethylene and propylene copolymers with 5-ethylidene-2-norbornene is proved by IR and Raman spectroscopy. The thermophysical characteristics of the initial and ozonized copolymers are compared.
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Original Russian Text © I.N. Meshkova, E.V. Kiseleva, V.G. Krasheninnikov, A.N. Shchegolikhin, 2017, published in Vysokomolekulyarnye Soedineniya, Seriya B, 2017, Vol. 59, No. 1, pp. 49–56.
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Meshkova, I.N., Kiseleva, E.V., Krasheninnikov, V.G. et al. Functionalization of polyolefins via the reaction of ozone with double bonds. Polym. Sci. Ser. B 59, 62–68 (2017). https://doi.org/10.1134/S1560090417010110
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DOI: https://doi.org/10.1134/S1560090417010110