CARBOCATIONIC REACTION BETWEEN 2,4,4-TRIM ETHYL-2-CHLOROPENTANE AND 1,1-DIPHENYL ETHYLENE .1. MAIN FEATURES OF THE REACTION

The carbocationic reaction between 2,4, 4-trimethyl-2-chloropentane, w hich is a model compound of polyisobutylene's end group, and 1,1-diphe nyl ethylene was investigated by high pressure liquid chromatography. It was found that the reaction presents a strong reverse reaction even if at low temperature, The ceiling temperature is about -18 degrees C . The reaction with time and effect of concentration of TiCl4, tempera ture, polarity of solvent on the reaction show that the main features of this reaction are very close to that of carbocationic polymerizatio n of isobutylene. So the reaction would be ideal model reaction for th e carbocationic polymerization.