Abstract 1,3‐Butadiene was polymerized anionically to polybutadiene which contained up to 100% 1,2‐addition product. The atactic 100% 1,2‐polybutadiene was prepared with n ‐butyllithium modified with bis piperidino ethane. The polymerization was done in hexane solvent at −5 to +20°C polymerization temperature.
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Halasa et al. (1981) studied this question.
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