Polymerization with living characteristics

This invention involved a free base aggregate method, involved select the method in the using of chain transfer agent and by the method system have of polymer; which the method including preparation formula (a,) and formula (b) of polymer; including make Xia also component for contact: (I) selected since vinyl base monomer (structure type for CH2=CUV), and Malay anhydride, and n-alkyl Malay n Asia amine, and n-aryl Malay n Asia amine, and rich horse acid II alkyl Ester and can ring of aggregate of monomer of monomer; (ii) selected since formula (c) and formula (d) Of sulfur generation Carbonyl sulfur compounds, its chain transfer constant is greater than about 0.1; and (iii) by free base source generated of free base; formula (a,) of polymer is by (I), and (ii) c and (iii) for contact system have of, formula (b) of polymer is by (I), and (ii) d and (iii) for contact system have of; and (iv) through change (ii) and (iii) of molecular number of ratio, to control formed of polymer of more dispersion index; which Q, and r, and u, and v, and z, and Z', m, p and q as in the manual definition.