On the use of ball milling to develop PHBV–graphene nanocomposites (I)—Morphology,thermal properties,and thermal stability |
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| Authors: | Jesús Ambrosio‐Martín Giuliana Gorrasi Amparo Lopez‐Rubio María José Fabra Luís Cabedo Mas Miguel Angel López‐Manchado Jose María Lagaron |
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| Affiliation: | 1. Novel Materials and Nanotechnology Group, IATA, CSIC, Paterna, (Valencia), Spain;2. Department of Industrial Engineering University of Salerno, Fisciano, Salerno, Italy;3. ESID, Universitat Jaume I, Castellón, Spain;4. Institute of Polymer Science and Technology, (CSIC), Madrid, Spain |
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| Abstract: | In the first part of this work, novel nanocomposites based on poly (3‐hydroxybutyrate co‐3‐hydroxyvalerate) (PHBV) and functionalized graphene nanosheets (FGS) were prepared through ball milling. As revealed by morphological characterization, this blending methodology was able to allow proper nanofiller dispersion and distribution into the matrix. Thermal properties were studied under non‐isothermal and isothermal conditions and the addition of FGS into PHBV matrix, although no changes in crystallization mechanism were observed, it modified the crystallization kinetics leading to increased crystallinity. Thermal stability analysis revealed that FGS affected the mechanism of oxidative thermal degradation and had no effect on thermal degradation by pyrolysis. Furthermore, an analysis of isothermal degradation kinetics showed that FGS speeded up the degradation rate. The Sestak‐Berggren model was used as a model to explain the isothermal degradation behavior of the obtained materials in good agreement with the experimental data. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132, 42101. |
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| Keywords: | biodegradable biomaterials biopolymers and renewable polymers composites graphene and fullerenes nanotubes |
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