Aqueous Degradation of MATER BI Y–Sisal Fibers Biocomposites

VERA ALVAREZ; ROXANA RUSECKAITE; ANALÍA VÁZQUEZ

JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS

Sage Publication

Año: 2007 vol. 20 p. 291 - 303

0892-7057

The effect of biotic and sterile aqueous environment (phosphate buffer pH 7.2, 25
C) on the water sorption, degradation behavior, and residual mechanical properties of short sisal fibers–Mater bi Y biocomposites is evaluated. The composite shows a higher water resistance in both media probably due to the presence of fiber–fiber and/or fiber–matrix interactions which are absent in the unfilled matrix. The presence of fibers seems to favor the microbial attack and the preferential loss of starch and hemicelluloses. The higher drop in dynamicalmechanical properties and creep behavior showed by the composite is not only associated with the loss of components but also with the detriment of fiber–matrix interface.
C) on the water sorption, degradation behavior, and residual mechanical properties of short sisal fibers–Mater bi Y biocomposites is evaluated. The composite shows a higher water resistance in both media probably due to the presence of fiber–fiber and/or fiber–matrix interactions which are absent in the unfilled matrix. The presence of fibers seems to favor the microbial attack and the preferential loss of starch and hemicelluloses. The higher drop in dynamicalmechanical properties and creep behavior showed by the composite is not only associated with the loss of components but also with the detriment of fiber–matrix interface.