Polymerization of 2-allylnorbornane using Ziegler-Natta catalysts: homopolymerization

Marathe, Sujata ; Mohandas, Thekke Pangil ; Sivaram, Swaminathan (1995) Polymerization of 2-allylnorbornane using Ziegler-Natta catalysts: homopolymerization Macromolecular Chemistry and Physics, 196 (11). pp. 3813-3824. ISSN 1022-1352

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/macp.19...

Related URL: http://dx.doi.org/10.1002/macp.1995.021961131

Abstract

Polymerization of 2-allylnorbornane using TiCl4 catalyst results in a polymer which is 40% insoluble in o-xylene at 130°C, whereas with TiCl3 catalyst, a polymer with 88% insolubility in o-xylene at 130°C is obtained. The o-xylene-insoluble fractions gave a very high melting point Tm = 355°C. The main features of these polymerizations are low catalyst activity and, in the case of TiCl4 catalyst, competitive isomerization of the monomer. Based on a comparison with the properties of an acyclic analogue, poly(4-methyl-1-pentene), the partly insoluble nature of poly(2-allylnorbornane) and its high melting point can be attributed to the presence of the bicyclic pendant.

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