Non-isothermal melt crystallization kinetics of poly(3-hydroxybutyrate), poly(butylene adipate-co-terephthalate) and its mixture

Abstract

Nonisothermal crystallization and melting of the biodegradable thermoplastics poly(3-hydroxybutyrate) (PHB), poly(butylene adipate-co-terephthalate) (PBAT), and a 1:1 PHB/PBAT blend were investigated by differential scanning calorimetry (DSC) over an extensive range of heating/cooling rates (2 to 64°C/min). The different phase transition behavior of the neat components was reflected in the mixture and suggest an immiscible blend. Pseudo-Avrami, Ozawa and Mo classical macrokinetic models were used to describe the evolution of the melt crystallization process. Results suggest that none of these models could be used to predict the experimental results of crystallization kinetics of the blend with sufficient precision for polymer processing applications. However, some methods may be of used for the neat resins over restricted ranges of cooling rate, temperature or conversion (e.g., Ozawa for PHB at low cooling rate, Mo for PBAT).

Development of active PHB/PEG antimicrobial films incorporating clove essential oil

“…This combination can be an option to reduce the demand for degradable packaging Polyhydroxybutyrate (PHB) is a well know biodegradable polymer used worldwide due to its crystalline structure, superior characteristics of aroma barrier, and water vapor permeability [9] . PHB is a thermoplastic polymer obtained from renewable natural sources that shown characteristics of biodegradability, biocompatibility, UV resistance and properties similar to the synthetic polypropylene [12][13][14] . However, the high crystallinity of PHB makes it very rigid and brittle, limiting its applications [15,16] .…”

“…PHB is a thermoplastic polymer obtained from renewable natural sources that shown characteristics of biodegradability, biocompatibility, UV resistance and properties similar to the synthetic polypropylene [12][13][14] . However, the high crystallinity of PHB makes it very rigid and brittle, limiting its applications [15,16] . To overcome this limitation, plasticizers are added to the PHB.…”

Non‐isothermal Crystallization Kinetics, Thermal, and Rheological Behavior of Linear/Branched Polypropylene Blends

“…The quantitative evaluation of non-isothermal crystallization is required to understand and model industrial processes, which are conducted under non-isothermal conditions. [19] Some studies correlated the results obtained by the Pseudo-Avrami, Ozawa, and Mo models for non-isothermal crystallization and the experimental results. [19][20][21][22] In blends of poly(3hydroxybutyrate)/poly(butylene adipate-co-terephthalate), the results suggest that none of the Pseudo-Avrami, Ozawa, or Mo models could be used to predict the experimental results of crystallization kinetics with sufficient precision for polymer processing applications.…”

“…[19] Some studies correlated the results obtained by the Pseudo-Avrami, Ozawa, and Mo models for non-isothermal crystallization and the experimental results. [19][20][21][22] In blends of poly(3hydroxybutyrate)/poly(butylene adipate-co-terephthalate), the results suggest that none of the Pseudo-Avrami, Ozawa, or Mo models could be used to predict the experimental results of crystallization kinetics with sufficient precision for polymer processing applications. [19] In PHB/babassu compounds, the Pseudo-Avrami model showed a better correlation with experimental data than the Mo model.…”

Recent advances in melt crystallization, towards process intensification and technique development

“…However, in most cases, the initial operational regime may not situate in the metastable zone or phase interval due to the difficulty of primary crystal formation. 57 Therefore, it is essential to introduce feasible approaches to induce primary crystal formation and ensure that the crystallization process is situated in the suitable operational regimes.…”