Optimization of the glass transition temperature of polyvinyl pyrrolidone/polyacrylamide blend films using response surface methodology

Abstract In this study, we aimed at synthesizing polymeric materials consisting of polyvinyl pyrrolidone (PVP) enhanced polyacrylamide (PAM) blend films and optimizing the glass transition temperature ( T g ) synthesized blends. The PAM PVP polymers were blended through solution casting techniques by varying (0.3–1.2 g) (0.3–1 concentrations in parallel. response surface methodology (RSM) experimental design, a mathematical statistical method, was used to design experiments, model process, determine optimum having lowest value. blends characterized using differential scanning calorimetry (DSC) investigate their phase temperatures such as . Moreover, with values Fourier transform infrared spectroscopy (FTIR), Thermogravimetric analyzer (TGA), UV–Vis interactions existing between parental polymers, thermal stability, optical properties energy band gap optimized respectively. It found that strongly dependent on polymer exhibited more pronounced effect films. declined when higher concentrations. stability lower than (i.e., 4.90 eV 210°C). DTG curve maximum weight loss 467°C. RSM analysis revealed high regression coefficient R 2 0.970 for films, showing analyzed are good agreement developed model. Numerical optimization results showed an concentration yielded value 83.63°C, which is close predicted 82.32°C, achieved 1.2 1 PVP. indicates formed highly brittle room available dry state.