Abstract

The radiotracer method can be used to study copolymerisations of M 1 and M 2 under conditions where [M 1]⪢[M 2]. In these circumstances, the probability of two M 2 units becoming adjacent in the polymer chain during propagation is negligible. Experimentally derived reactivity ratios, obtained by a simple graphical solution of composition data, are realistic measures of relative reactivities even with systems where penultimate group effects or depropagation effects due to M 2M 2 diads are normally significant.

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