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The effect of thermoplastic starch on the properties of HDPE/TPS blends during UV-accelerated aging |
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| Authors: | M. L. M��ndez-Hern��ndez C. S. Tena-Salcido Z. Sandoval-Arellano M. C. Gonz��lez-Cant�� M. Mondrag��n F. J. Rodr��guez-Gonz��lez |
| Affiliation: | 1. Centro de Investigaci??n en Qu??mica Aplicada, Blvd. Enrique Reyna No. 140, Saltillo, 25253, Coahuila, M??xico 2. Pe?oles Centro de Investigaci??n y Desarrollo Tecnol??gico, Prolongaci??n Ignacio Comonfort Sur # 2050, Torre??n, 27300, Coahuila, M??xico 3. Instituto Polit??cnico Nacional, ESIME Azcapotzalco, Av. de las Granjas 682, Azcapotzalco, 02250, M??xico, D.F, M??xico |
| Abstract: | The influence of thermoplastic starch (TPS) on the properties of UV-irradiated TPS/high-density polyethylene (HDPE) blends was investigated. Changes in chemical structure, molecular weight, crystallinity, and mechanical properties, as a function of exposure time, were determined using FTIR-spectroscopy, gel permeation chromatography (GPC), differential scanning calorimetry (DSC), and tensile tests. The inclusion of TPS influence neither the evolution of carbonyl index nor the molecular weight reduction of HDPE/TPS. In contrast, the presence of TPS in the blends increased the fusion enthalpy because of starch retrogradation. This increasing resulted in a corresponding increase of Young??s modulus of HDPE/TPS blends. |
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