| abstract |
Alkoxysilyl terminated polymers are prepared with narrow molecular weight distributions, predictable molecular weights, and high functionality. The functionality is controlled by employing either a monofunctional (f=1) or difunctional (f=2) initiator. The endcapped materials can be condensed under acidic conditions. Monofunctional polymers are soluble after condensation and amenable to SEC and 29Si NMR analysis. On the other hand, difunctional condensates can be insoluble in common organic solvents. Monofunctional products exhibit extraordinary condensation behavior. The narrow molecular weight distribution of the precursors is preserved after condensation, and the extent of growth is a function of the method of preparation. The monofunctionalized products can serve as stable precursors for the preparation of soluble, branched polymers. |