Synthesis of aminotelechelic polymers with the redox system TiCl3NH2OH in hydrochloric aqueous phase: 2. Polymerization of methylmethacrylate. Relation functionality/molecular weight/yield

Aminotelechelic poly(methylmethacrylates) of which number average molecular weight $\text{M}\text{?}{}_{\mathrm{n}}$ is less than 7 × 10³ are synthesized with the redox system $\text{TiCl}{}_3\text{NH}{}_2\text{OH}$ in hydrochloric aqueous phase. Functionality, molecular weight and yield are discussed on the basis of initiation, propagation and termination reactions. These considerations justify the influence of various factors such as the addition time of the TiCl₃ solution, the molar ration $\text{MMA}\text{TiCl}{}_3$ and the nature of the reducing ions. The evolution of molecular weights determined by g.p.c. confirms the interpretation of the results.