| abstract |
The anionic polymerization of isoprene with monolithium initiators and functionalized initiators having the structure R 1 R 2 R 3 Si--O--A'--Li wherein R 1 , R 2 , and R 3 are preferably alkyl, alkoxy, aryl, or alkaryl groups having from 1 to 10 carbon atoms, and A' is preferably a branched or straight chain bridging group having at least 2 carbon atoms produces unsaturated and hydrogenated isoprene polymers having high 1,4-addition of the isoprene, from about one to two terminal functional groups per molecule, and low viscosity. |