Production of Butyl Rubber by Suspension Polymerisation using a Modified Catalytic System

Determination of kinetic constants of the cationic copolymerization of isobutylene with isoprene

“…For solving the IKP, we used experimental data from earlier works [2,9]. In one of these works [2], all syntheses were car ried out in a flask, which can be considered to be a per fect mixing reactor owing to its small volume and intensive stirring.…”

“…These experimental data provide insight into the kinetics of the cationic polymerization process without side factors. The experiment reported by Markina et al [9] was also conducted in a flask, in which the reaction mixture was undergoing self heat ing. We took into account this fact when solving the IKP (see step 3 in solving the IKP).…”

“…Markina et al [9] recorded an experimental [IB](t) curve (Fig. 2) for cationic isobutylene-isoprene copo lymerization in a flask at a low initial aluminum chlo ride concentration [AlCl 3 ] 0 (AlCl 3 was initially com bined with isoprene in an equimolar ratio).…”

Prediction of results of butyl rubber synthesis in mixing or plug flow reactors: an effect of factors controlling process on Mooney viscosity of butyl rubber and strength properties of its vulcanizates

“…(3) Based on the experimental curve of isobutylene conversion in the synthesis of butyl rubber in a fl ask [11], the temperature dependences of the constants k p21 and k p22 were found. The joint solution of equations of the kinetic module and the heat balance of the fl ask allowed determining the temperature jump compared with the starting time of the process and, therefore, selecting the desired temperature dependences of constants k p21 and k p22 .…”

“…(3) MWD (q w ) of butyl rubber produced at each point of the reactor was determined by the Flory MWD formula [11] , where М is polymer molecular weight, M * is average molecular weight of butyl rubber unit (it was assumed to be equal to M 1 * due to the low concentration of injected isoprene).…”