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

✍ Scribed by Sujata Marathe; Thekke Pangil Mohandas; Swaminathan Sivaram

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
545 KB
Volume
196
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

Polymerization of 2‐allylnorbornane using TiCl~4~ catalyst results in a polymer which is 40% insoluble in o‐xylene at 130°C, whereas with TiCl~3~ 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 T~m~ = 355°C. The main features of these polymerizations are low catalyst activity and, in the case of TiCl~4~ 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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