| 摘要 |
The present invention provides a process for making functionalized polymers comprising the steps of(a) initiating polymerization of an unsaturated monomer with a lithium initiator having the structure R1R2R3Si-O-A-Li wherein A is a branched or straight chain bridging group having at least two carbon atoms, R1,R2, and R3 are alkyl, alkoxy, aryl, or alkaryl groups having from 1 to 10 carbon atoms, thus producing a functionalized polymer which has a protecting silyl group at one end thereof; and(b) contacting the protected polymer with from 0.5 to 1.1 moles of aqueous fluoroboric acid per mole of polymer at 0 to 50° C. for 1 to 10 minutes, and(c) contacting the resulting solution with water, and(d) recovering a linear or branched deprotected polymer having one or more terminal functional groups.
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