Abstract
Ramie fabric-reinforced thermoset poly lactic acid composites were produced from ramie fabrics and methacrylated four-armed star-shaped poly lactic acid resin by hot press molding. The resin was brushed uniformly on the surface of ramie fabrics. The properties of the composites were investigated by mechanics performance test, water absorption test, dynamic mechanical analysis, thermogravimetric analysis, and scanning electron microscopy. The result shows that ramie content should be properly controlled at as much as 48%. The composite with 8% alkali treatment obtained higher tensile strength and flexural strength, as well as decreased impact strength caused by surface treatment. The composite with treated ramie fabrics had slightly better water resistance and thermal stability than those without surface treatment because of enhanced interfacial adhesion between fabrics and matrix. The DMA results and morphologies of the composites confirmed the improvement of ramie–matrix interface bonding.
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