Effect of Temperatures and Water Types on Water Absorption of Rubberwood Flour-Polypropylene Composites
Keywords:
Wood-plastic composites,, rubberwood flour,, water absorption,, temperatureAbstract
This article presents an effect of temperatures and water types on water absorption of recycled polypropylene (rPP) composites reinforced with rubberwood flour (RWF). The composite materials were produced into sample panels by using a twin-screw extruder. According to the test results, water absorption (WA) of the composites increased with RWF content and immersion time. The WA content is highest about 3.91%. An increase of the water temperature levels from 25 to 65 oC significantly increased the WA of the composites. The composites soaked in Thailand Gulf water had smaller water absorption than in tap water. Likewise, reduction in flexural strength and modulus of the composites after immersing in Thailand Gulf water is lower than in tap water, decreasing 21.9% and 37.9%, respectively.
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