Thermal Stability and Decomposition Mechanisms of PVA/PEGDA-PEGMA IPN-Hydrogels: A Multimethod Kinetic Approach.

ABSTRACT: This paper presents a comprehensive analysis of the thermal stability and decomposition mechanisms of IPN hydrogels based on polyvinyl alcohol (PVA) and a copolymer network of poly(ethylene glycol) diacrylate-poly(ethylene glycol) methacrylate (PEGDA-PEGMA). Using thermogravimetric analysis (TGA/DTG) and multi-approach kinetic analysis (Friedman and Ozawa-Flynn-Wall isoconversion methods, nonparametric kinetics, Shestaka-Berggren model), the influence of composition on the processes of dehydration, thermal destruction, and the distribution of activation energy by degrees of conversion was investigated. The constructed three-dimensional kinetic "landscapes" made it possible to identify characteristic features of the behavior of various samples, including differences in the rate and mechanis

SUBMITTER: Sarsenbekova AZ 

PROVIDER: S-EPMC12566940 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature