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Which catalyst is used for the coordination polymerisation of polybutadiene?

Which catalyst is used for the coordination polymerisation of polybutadiene? Correct Answer neodymium-based catalyst

The salt of neodymium has been widely used in industrial polymerization of 1,3-butadiene. The neodymium catalyst causes high catalytic activity during the polymerization of dienes, however good control has not been achieved with regard to molecular weight and molecular weight distribution.

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