Modeling the crystallization kinetics of polymers displaying high levels of secondary crystallization

Abstract The isothermal crystallization of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) was evaluated using a range models, namely, Avrami, simplified Hillier, Tobin, Malkin, Urbanovici–Segal, Velisaris–Seferis, and Hay. Two methods model evaluation were used: determination the parameters through traditional double log plots curve fitting via nonlinear, multivariable regression. Visual inspection cumulative curves, calculation R 2 value standard error regression, returned used to assess which best describes experimental data. Hay found generate fit, closely followed by Velisaris–Seferis parallel model, suggesting that primary secondary occur concurrently. Tobin models perform well when data is restricted region where dominates; however, they could not be successfully entire process. This work highlights importance selecting most appropriate for analyzing kinetics, especially high levels lamellar thickening infilling during crystallization.