Untersuchungen zur stereospezifischen pfropfung von butadien auf chloriertes polycyclopentadien

✍ Scribed by Heublein, Günter ;Freitag, Werner ;Mock, Werner

• Book ID: 102481009
• Publisher: Wiley (John Wiley & Sons)
• Year: 1980
• Weight: 494 KB
• Volume: 181
• Category: Article
• ISSN: 0025-116X
• DOI: 10.1002/macp.1980.021810124

✦ Synopsis

Abstract

Products with >90% of 1,4‐cis‐units in the grafted chains are obtained by employing suitable concentrations of cobalt complexes as an initiator component in the grafting of butadiene onto chlorinated polycyclopentadiene. Grafting efficiencies >90% can be achieved. In contrast to grafting without using cobalt complexes the reaction rate is faster. Suitable solvents are chlorobenzene, 1,2‐dichloroethane, or dichloromethane. Grafting efficiency, degree of grafting, and the molecular weights of the grafted chains are obtained by selective extraction of the grafts with pentane. The results suggest a cationic‐coordinative mechanism, in most cases accompanied by a “pure” cationic grafting.