Abstract
In this work, the effects of alkali treatment on the chemical composition and thermal decomposition of Acacia planifrons fibers were investigated. The fibers originating from the bark of an Acacia planifrons tree were alkali treated with various concentrations (2% and 5% w/v) for 30 min. The treatment was found to diminish the amorphous contents, improve the crystallinity index and thermal stability of the fiber. The crystallinity index of the untreated, 2% alkali-treated and 5% alkali-treated fibers was estimated to be 65.38%, 69.94% and 74.76%, respectively. The thermal stability of the alkali-treated fiber was quite higher than that of the untreated fiber. The results revealed that 5% alkali-treated Acacia planifrons fibers are suitable to be used as reinforcement in polymer composites.
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