METHOD FOR PARTIAL OR TOTAL OXIDATION OF ONE OR SEVERAL THIOCARBONYLTHIO ENDS OF POLYMER OBTAINED BY RADICAL POLYMERIZATION CONTROLLED BY REVERSIBLE ADDITION-FRAGMENTATION

摘要

PPROBLEM TO BE SOLVED: To modify a thiocarbonylthio agent present in polymer chains in order to render the polymer chemically stable and thus to prevent it from decomposing under the effect of chemical agents or of ultraviolet radiation and from producing odors or yellowing of the polymer, or from modifying the properties of the polymer. PSOLUTION: There is provided a method for partially or completely oxidizing one or more thiocarbonylthio ends of a polymer resulting from radical polymerization controlled by reversible addition-fragmentation using the thiocarbonylthio agent. The method includes the step of bringing the polymer into contact with an ozone-containing gas, and reacting the ozone with the thiocarbonylthio end or ends. The polymer obtained by the method and uses thereof are also provided. PCOPYRIGHT: (C)2011,JPO&INPIT