Role of hydroxyl-containing compounds in processes of cationic polymerization of dl-lactide

Implementation of Differential Scanning Calorimetry when Studying Polymerization of Compounds Based on Glycolic Acid Ether

“…Inconsistency of the analysis data is explained by the fact that the process is multi-stage, and methods of non-a priori kinetic analysis can't provide an accurate value for every stage, but only one value (intermediate value) for every degree of conversion. The decrease in the activation energy value with the introduction of β-monomer is a consequence of a change in the chain propagation mechanism, apparently, due to lack of steric hindrances [10]. The corresponding values presented in Table 2 are close to literature data [10,11] for different polymer systems.…”

“…The decrease in the activation energy value with the introduction of β-monomer is a consequence of a change in the chain propagation mechanism, apparently, due to lack of steric hindrances [10]. The corresponding values presented in Table 2 are close to literature data [10,11] for different polymer systems.…”

“…The slope of the lines at the initial polymerization stage points at the initial reaction of one-two-and three-dimensional diffusion. The process in such mixtures runs on free ions and the reaction occurs with steric hindrances [10]. When comparing the results of Flynn-Wall-Ozawa and Friedman analyses, it may be seen that the activation energy values differ from one another in the range of 14-40%.…”