The experimental results showed that it was possible to modify vermiculite with tetrabutyl phosphonium bromide as confirmed by FTIR and TGA analysis. Although, the modification degree of vermiculite was not so high, producing P-VMT within more or less 3wt% of organo-cation, the Ecobras/P-VMT composite had a higher Young's modulus, suggesting better filler-matrix interaction promoted by organic chains of phosphonium cations attached to vermiculite. Thermal resistance was little affected by VMT and P- VMT presence, but during all degradation steps composites were more resistant than Ecobras. Also, the mass loss measured in biodegradation test was higher for composites containing P-VMT, which could indicate that this clay accelerated the biodegradation process.
The experimental results showed that it was possible to modify vermiculite with tetrabutyl phosphonium bromide as confirmed by FTIR and TGA analysis. Although, the modification degree of vermiculite was not so high, producing P-VMT within more or less 3wt% of organo-cation, the Ecobras/P-VMT composite had a higher Young's modulus, suggesting better filler-matrix interaction promoted by organic chains of phosphonium cations attached to vermiculite. Thermal resistance was little affected by VMT and P- VMT presence, but during all degradation steps composites were more resistant than Ecobras. Also, the mass loss measured in biodegradation test was higher for composites containing P-VMT, which could indicate that this clay accelerated the biodegradation process.
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