Non-isothermal degradation kinetics of novel poly(monoethyleneglycol dimethacrylate-co-anthranilic acid cinnamoyl ester) synthesized via aza-Michael addition polymerization reaction

A new type of co-polymer between anthranilic acid cinnamoyl ester and monoethyleneglycol dimethacrylate was synthesized via aza-Michael addition polymerization reaction by bulk polymerization method without adding any catalyst. The polymerization reaction was carried out at 100 °C for 2 h under N2 atmosphere with mild stirring. The co-polymer was synthesized at various monomer ratios. The above-synthesized co-polymer was characterized by Fourier transform infrared (FTIR) spectroscopy, UV–visible reflectance spectroscopy, X-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscopy, etc. The FTIR data confirmed the 0.032 order of reaction with respect to [M1/M2]. The amorphous nature of the above-synthesized polymer was confirmed by XRD. The non-isothermal degradation kinetics was followed at five different heating rates with five different models. The goal of the present work is to compare the results from TGA data and select the best approach for the synthesized polymer. The activation energy (Ea) values were also determined by model-free methods. The experimental results were carefully analysed and compared with the literature values.