Non-isothermal melt crystallization kinetics of poly(3-hydroxybutyrate), poly(butylene adipate-co-terephthalate) and its mixture
| Autor: | Anna Raffaela M. Costa, Edson Noryuki Ito, Eduardo L. Canedo, Laura Hecker Cavalho |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Phase transition Materials science PHB Organic Chemistry Poly-3-hydroxybutyrate Polymer Crystallization kinetics lcsh:Chemical technology Isothermal process law.invention Differential scanning calorimetry chemistry Chemical engineering Blends law Adipate blends Chemical Engineering (miscellaneous) lcsh:TP1-1185 PBAT crystallization kinetics Crystallization |
| Zdroj: | Repositório Institucional da UFRN Universidade Federal do Rio Grande do Norte (UFRN) instacron:UFRN Polímeros, Vol 29, Iss 1 (2019) Polímeros v.29 n.1 2019 Polímeros (São Carlos. Online) Associação Brasileira de Polímeros (ABPol) instacron:ABPO |
| Popis: | 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). |
| Databáze: | OpenAIRE |
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