Thermal evaluation of cashew nutshell liquid as new bioadditives for poly(methyl methacrylate)
In this study, the thermal-oxidative stability of poly(methyl methacrylate), PMMA, 1 % additivated with replenishable phenolic lipids is evaluated by thermogravimetric (TG/DTG) analyses and differential scanning calorimetry (DSC) analyses. Since technical cashew nutshell liquid (CNSL), a byproduct from the cashew industry, is composed basically of two phenolic lipids, cardanol and cardol, the utilization of this industrial waste and its main components as a new source of bioadditives for use as antioxidants is evaluated. The TG analyses revealed that addition of the phenolic constituent of CNSL increased the thermal stability of PMMA films considerably. The results obtained were also confirmed by DSC analyses.
KeywordsPoly(methyl methacrylate) CNSL Cardanol Cardol Antioxidant
The authors wish to thank the Brazilian agencies CNPq (Processo 565320/2008-4) and CAPES by the financial support. Also to CENAUREMN for NMR analyses, and Amêndoas do Brasil LTDA for the technical CNSL samples.
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