Abstract
Radical polymerizations of 7,8-bis(ethylthio)-7,8-dicyanoquinodimethane (ESCQ) and 7,8-bis(phenylthio)-7,8-dicyanoquinodimethane (PSCQ) were studied in chloroform with AIBN. ESCQ and PSCQ were found to undergo a typical equilibrium polymerization, which allowed one to obtain their values for equilibrium monomer concentration, ceiling temperature of polymerization, and enthalpy and entropy changes of polymerization. When reacted above the equilibrium monomer concentration, ESCQ and PSCQ were copolymerized in a random fashion with styrene in chloroform
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