Abstract
Biodegradable poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV)/graphene nanosheet (GNS) composites were prepared via a solution-casting method at low GNS loadings in this work. Transmission electron microscopy revealed that a fine dispersion of GNSs was achieved in the PHBV matrix. The thermal properties of the nanocomposites were investigated by thermogravimetric analysis, and the results showed that the thermal stability of PHBV was significantly improved with a very low loading of GNSs. Nonisothermal melts crystallization behavior, spherulitic morphology and crystal structure of neat PHBV and the PHBV/GNSs nanocomposites were investigated, and the experimental results indicated that crystallization behavior of PHBV was enhanced by the presence of GNSs due to the heterogeneous nucleation effect; however, the two-dimensional (2D) GNSs might restrict the mobility of the PHBV chains in the process of crystal growing. Dynamic mechanical analysis studies showed that the storage modulus of the PHBV/GNSs nanocomposites was greatly improved.
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The work was financially supported by the Ningbo Natural Science Foundation (Nos. 2010A610193 and 2011A610116), the Program for Ningbo Innovative Research Team (2009B21008) and the Ningbo Key Lab of Polymer Materials (No. 2010A22001).
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Wang, Bj., Zhang, Yj., Zhang, Jq. et al. Crystallization behavior, thermal and mechanical properties of PHBV/graphene nanosheet composites. Chin J Polym Sci 31, 670–678 (2013). https://doi.org/10.1007/s10118-013-1248-1
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DOI: https://doi.org/10.1007/s10118-013-1248-1