Comparative Study on the Composites with Chopped Different Parts of Rice Straw as Raw Materials

Chuan Bao Wu; Jian Mei Yin

doi:10.4028/www.scientific.net/AMM.525.85

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Comparative Study on the Composites with Chopped Different Parts of Rice Straw as Raw Materials
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 525Comparative Study on the Composites with Chopped...

Comparative Study on the Composites with Chopped Different Parts of Rice Straw as Raw Materials

Abstract:

The upper part and lower part of rice straw were respectively used as raw materials to prepare composites with poly (vinyl alcohol) (PVA) by hot-pressing at 140°C for 10 min. The performance differences of two kinds of composites were studied. Results showed that composites prepared with upper-part rice straw had higher tensile strength, strength at tensile break and hardness than that with lower-part rice straw. But the tensile elongation of composite prepared with upper-part rice straw was lower than that with upper-part rice straw. Difference ratio of tensile strength is higher than 6% and difference ratio of tensile elongation is higher than 16%. These differences were related to morphology and structure of upper-part rice straw and lower-part rice straw. Two parts of rice straw are both hollow, but upper-part rice straw has thinner holes. So the defect ratio of composite prepared with upper-part rice straw was low.