Oxidative skeleton breaking in epoxy–amine networks

摘要

AbstractThe photo and thermal oxidation of various epoxide–amine tridimensional polycondensates is studied by IR spectrophotometry and DSC. The network degradation results in a decrease of the glass transition temperature (Tg), which is correlated with the quantity of amide groups formed. For each system, the relative yield in skeleton breaks increases with the intensity of internal stresses. A mechanism involving the β scission of α amino alkoxy macroradicals resulting from oxidation of constrained segments of the network is propo