VINYLTRIMETHYLSILANE-CO-N-VINYL-2-PYRROLINE AND VINYLTRIMETHOXYSILANE-CO-N-VINYL-2-PYRROLIDONE COPOLYMERS - SYNTHESIS AND REACTIVITY RATIOS

Copolymers containing vinyltrimethylsilane and vinyltrimethoxysilane w ith N-vinyl-2-pyrrolidone at different compositions were synthesized a nd characterized. The reactivity ratios was estimated by using the cla ssical Fineman-Ross and Kelen Tudos linear fitting procedures. These p arameters were also estimated through a computer program based on nonl inear minimization algorithm, starting from the r(1) and r(2) values o btained by the former procedures. The analysis of the results allow us to interpret the reactivity behaviour of these polymers in terms of t he relative reactivity of the substiuents. The effect of the chemical structure of the polymer side group is discussed in terms of the diffe rent contributions to the stabilization of the radical intermediates.