Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 54, Issue 6, Pages 1832-1841Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ie504593z
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Funding
- National High-Tech R&D Program of China (863 Program) [2011AA02A203]
- National Natural Science Foundation of China [21274077, 21374054]
- Sino-German Center for Research Promotion
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Hexagonal boron nitride nanosheets (BNNSs) were prepared by a facile chemical exfoliation method. Then cosolution film casting method was used to obtain poly(butylene adipate) (PBA)/BNNSs nanocomposites. The incorporated BNNSs changed the formation condition of the polymorphic crystals of PBA. The results of differential scanning calorimetry (DSC) and wide-angle X-ray diffraction (WAXD) showed that BNNSs significantly facilitated the formation of a-form crystals for isothermal and nonisothermal crystallization. Compared to pure PBA at 28 degrees C, the a-form crystals would not disappear until the temperature decreased to 13 degrees C with the addition of 0.5 wt % BNNSs. In addition, the excellent heterogeneous nucleation ability of BNNSs was identified by the nonisothermal and isothermal crystallization process. The enzymatic degradation experiments exhibited that PBA/BNNSs nanocomposites possessed a considerably lower degradation rate than neat PBA. This work demonstrates that BNNSs is an efficient material to regulate the formation of polymorphic crystals and the degradation behavior of PBA.
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