The choice of the KUHN‐MARK‐HOUWINK constants, the different ways of evaluating Mn or v̄ from intrinsic viscosity, the selection of ktc/ktd from the literature values and the magnitude of error (±20%) in kp/kt determination may cause by an additive effect a differences of the values of kp and kt by a factor of three to four. The discrepancies in the reported values of the absolute rate constants of the polymerization of methyl methacrylate have been explained by this fact.
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Zafar et al. (1973) studied this question.
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