Miscibility, crystallization kinetics, and mechanical properties of poly(3-hydroxybutyrate-co-3-hydroxyvalerate)(PHBV)/poly(3-hydroxybutyrate-co-4-hydroxybutyrate)(P3/4HB) blends
| Autor: | Jueyu Pan, Xianyu Chen, Zhifei Chen, Kaitian Xu, Xiaojuan Wang |
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| Rok vydání: | 2010 |
| Předmět: |
Morphology (linguistics)
Materials science Polymers and Plastics General Chemistry Miscibility Surfaces Coatings and Films Amorphous solid Crystallization kinetics Chemical engineering Materials Chemistry Elongation Fourier transform infrared spectroscopy Composite material Glass transition Elastic modulus |
| Zdroj: | Journal of Applied Polymer Science. 117:838-848 |
| ISSN: | 1097-4628 0021-8995 |
| DOI: | 10.1002/app.31215 |
| Popis: | Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)(PHBV)/poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P3/4HB) blend films were prepared by solvent-cast method. The nonisothermal crystallization results showed that PHBV and P3/4HB are miscible due to a single glass transition temperature (Tg), which is dependent on blend composition. The isothermal crystallization results demonstrate that the crystallization rate of PHBV becomes slower after adding amorphous P3/4HB with 19.2 mol% 4HB, which could be proved through depression of equilibrium melt point () from 183.7°C to 177.6°C. For pure PHBV and PHBV/P3/4HB (80/20) blend, the maximum crystallization rate appeared at 88°C and 84°C, respectively. FTIR analysis showed that PHBV/P3/4HB blend films would maintain the helical structure, similar to pure PHBV. Meanwhile, with increasing P3/4HB content, the inter- and intra-interactions of PHBV and P3/4HB decrease gradually. Besides, a lower elastic modulus and a higher elongation at break were obtained, which show that the addition of P3/4HB would make the brittle PHBV to ductile materials. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010 |
| Databáze: | OpenAIRE |
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