POLYMERIZATION OF 3,6-DIBROMO-9-(2,3-EPOXYPROPYL)CARBAZOLE WITH LEWIS-ACIDS

The kinetics of polymerization of 3,6-dibromo-9-(2,3-epoxypropyl)carba zole with stannic chloride and boron trifluoride etherate were studied by a microcalorimetric technique. Complex kinetics of the polymerizat ion rate were observed. A spontaneous increase of the reaction rate wa s recorded after it decreased and after polymerization for some time a t the minimal rate. This effect is explained by a change in the mechan ism of polymerization. At the high enough degree of conversion, transi tion from an active chain end mechanism to an activated monomer mechan ism takes place.