| Abstract: | PDMS-based macrothiuram disulfides of different molecular weights capable of being used as macro-thermal iniferters towards deriving PDMS-containing triblock copolymers were synthesized and characterized. The synthesis of ω-(secondary amine)-terminated PDMS were accomplished by the hydrosilylation reaction of silyl hydride terminated PDMS with allyl-N-methylamine. Macroamines were eventually transformed to macroiniferters by the thiocarbamylation reaction and oxidative coupling. Kinetics of polymerization studied in the case of MMA and styrene in bulk, and as in toluene solution in case of MMA, revealed that the macroiniferters are as efficient as their microanalogues from the point of view of their initiating and chain-terminating properties. The different kinetic parameters were determined and discussed. © 1993 John Wiley & Sons, Inc. |
