Kinetics of thermal degradation applied to biocomposites with TPS, PCL and sisal fibers by non-isothermal procedures |
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Authors: | Vitor Brait Carmona Adriana de Campos José Manoel Marconcini Luiz Henrique Capparelli Mattoso |
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Institution: | 1. Materials Science and Engineering Department (PPG-CEM), Federal University of S?o Carlos, S?o Carlos, SP, 13565-905, Brazil 2. National Nanotechnology Laboratory for Agriculture (LNNA), Embrapa Instrumentation, S?o Carlos, SP, 13560-970, Brazil
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Abstract: | The thermal degradation behavior of the biocomposite with thermoplastic starch (TPS), poly(ε-caprolactone) (PCL) and bleached sisal fibers were investigated by thermogravimetry analysis (TG/DTG) under synthetic air atmosphere, differential scanning calorimetry, and their crystal structure by X-ray diffraction. Applying the non-isothermal Ozawa method, the TG/DTG curves average activation energy could be obtained for thermal degradation of the biocomposites with 5, 10, and 20 % of bleached sisal fibers. The apparent activation energy values for the biocomposites decreased when compared with the TPS/PCL blend, requiring lower energy to recycle this material. However, continuous addition of sisal fibers increased the activation energy of composites. |
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