S,S'-BIS-(.ALPHA., .ALPHA.' - DISUBSTITUTED - .ALPHA.' - ACETIC ACID) - TRITHIOCARBONATES AND DERIVATIVES AS INITIATOR - CHAIN TRANSFER AGENT - TERMINATOR FOR CONTROLLED RADICAL POLYMERIZATIONS AND THE PROCESS FOR MAKING THE SAME

摘要

A S,S'-bis-(.alpha., .alpha.'-disubstituted- .alpha.."-aceticacid)trithiocarbonates of formula:(see above formula)and derivatives thereof can be used as an initiator, chain transfer agent, orterminator for polymerization of monomers such as free radical polymerizablemonomers. Homopolymers, copolymers, and the like as well as blockcopolymers can be made utilizing the trithiocarbonate compound such as in aliving free radical polymerization as well as to form telechelic polymers.