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Thermal characterization of UHMWPE stabilized with natural antioxidants |
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| Authors: | M Peltzer J R Wagner A Jiménez |
| Institution: | 1.Key Laboratory of Materials Physics, and Anhui Key Laboratory of Nanomaterials and Nanostructures, Institute of Solid State Physics,Chinese Academy of Sciences,Hefei,P. R. China;2.Hefei National Laboratory for Physical Science at Microscale, Structure Research Laboratory,University of Science and Technology of China,Hefei,P. R. China |
| Abstract: | This work presents a study of the thermal degradation of ultra-high molecular mass polyethylene (UHMWPE) stabilized with natural (α-tocopherol and carvacrol) and synthetic antioxidants. Thermogravimetric analysis in dynamic mode was used to determine the apparent activation energies of different samples. The stabilization of UHMWPE with low concentrations (around 0.3%) of α-tocopherol is enough to obtain an efficient thermal performance of the polymer. Carvacrol is also a good stabilizer for UHMWPE, but at higher concentration than in the case of α-tocopherol. The comparison of apparent activation energy between samples with natural and synthetic antioxidants in similar concentration shows that α-tocopherol is a better stabilizer in terms of their thermal performance. |
| Keywords: | antioxidants carvacrol kinetic methods thermogravimetric analysis α -tocopherol UHMWPE |
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