| 摘要 |
NEW MATERIAL:The compound of formula I (R is 1-10C hydrocarbon group or halogen-containing hydrocarbon group; n is 0-3). USE:Useful as a polymerization initiator of ethylenic unsaturated monomer. It generates radicals easily at a lower temperature than conventional initiators, and induces the polymerization of the monomer in high efficiency. A reactive hydroxyl group can be introduced to the chain terminal to produce a telechelic polymer. PREPARATION:The compound of formula I can be prepared by reacting the acid halide of formula II (X is halogen) with Na2O3 in water at -20-0 deg.C, and extracting with a proper solvent (e.g. benzene, toluene, etc.). The polymerization using the compound of formula I starts at -10-+30 deg.C in a solvent such as 1,1,2-trifluoro-1,2,2-trichloroethane. |
