Table . Fit reactivity ratios and depropagation rate coefficients for the data presented in Figure . Uncertainties are determined through bootstrapping method and the bounds of 95% confidence intervals are listed in parentheses. For iPrSi8 and iPrAc8 the value of 𝛽 PMQM@MQ/$ was independently measured and the uncertainty is presented as the result of a triplicate measurement. Next, we sought to characterize the ROMP copolymerization of dihydrofuran (DHF), a cyclic enol-ether, as an additional class of cleavable comonomer that has been applied to linear polymeric and thermoset materials. Previously, one of our groups reported the use of dihydrofuran in copolymerizations with exo-norbornene monomers to yield acid-degradable polymers. Fitting copolymerization data for such systems using the Meyer-Lowry equation yielded reactivity ratios of rexo-NB = 0.41, rDHF = 0.088, suggesting a strong alternating copolymerization behavior (i.e., 𝑟 /XM(N" × 𝑟 Y2C = 0.036 ≪ 1). Interestingly, these reactivity ratio values contradict expected reactivity trends for ruthenium-based olefin metathesis catalysts, where electron-rich Ru Fischer carbenes (as would exist for a DHF terminal chain end) are known to exhibit metathesis selectivity with similarly electron-rich olefins over electronically neutral olefins such as exo-NB, suggesting that the value of rDHF should be significantly greater than 1. We attribute this discrepancy to the fact that the copolymerization proceeded well below the equilibrium concentration of DHF (3.2 M), which was not captured in the Meyer-Lowry model and would lead to misinterpretation as alternating behavior due to the thermodynamic drive for DHF to propagate from a norbornene chain end but not subsequently homopolymerize below its equilibrium concentration. We re-fit the previously reported exo-NB and DHF copolymerization data using the methods developed herein and obtained values of rexo-NB = 0.26 , rDHF = 5.3, and 𝛾 = 0.02 M. Notably, the value of rDHF is different by a factor of 60 to the Meyer-Lowry fitting and falls more in line with expectations for Grubbs-type ROMP initiators (i.e., rDHF would be expected to be >1). Further the value of 𝛾 ≪ 1 is consistent with the rate of depropagation of a DHF unit to reveal a norbornene chain end being relatively irreversible. Finally, we applied copolymer equation integration to reevaluate the characterization of two previously reported copolymerization data sets for glycolide/lactide and poly(ethylene glycol) methyl ether methacrylate (PEGMA9) / 2-(diethylamino)ethyl methacrylate (DEAEMA) where both comonomers are known to exhibit reversible propagation behavior. In both cases, previous fitting had been conducted under the simplification that only one of the two comonomers could polymerize reversibly (lactide and PEGMA9). In the case of glycolide/lactide, fitting data with a model that considers reversible propagation of both comonomers allowed us to distinguish between the effects of glycolide depropagation and transesterification reactions at high glycolide loadings. Additionally, in the case of PEGMA9/DEAEMA, such a method provided significantly improved fits of the data and