화학공학소재연구정보센터
Journal of Applied Polymer Science, Vol.64, No.7, 1267-1273, 1997
Bamboo Fiber-Reinforced Polypropylene Composites - Crystallization and Interfacial Morphology
Bamboo fiber-reinforced polypropylene (PP) composites were prepared. PP and two maleated polypropylenes( s-MAPP and m-MAPP) were used as matrices. Crystallization and interfacial morphology were studied by using differential scanning calorimetry (DSC), wide angle X-ray diffraction (WAXD), and optical microscopy. It has been shown that the addition of bamboo fiber to any of the three polymers causes an increase in the overall crystallization rate. A considerable amount of beta-form crystallinity was produced in the PP, s-MAPP, and m-MAPP by mixing with bamboo fiber; and all the bamboo fiber-filled samples contain both the alpha- and the beta-forms. The relative amount of the beta-form in the samples was calculated from WAXD data by the K value. There is no beta-form observed in the pure PP, s-MAPP, and m-MAPP. Bamboo fiber acted as both a reinforcement and a beta-nucleator. The nucleation density of both s-MAPP and m-MAPP at the fiber surface is remarkably higher than that of PP because an improved interfacial adhesion is reached in the case of s-MAPP and m-MAPP as matrices. The transcrystalline growth of s-MAPP and m-MAPP on the bamboo fiber surface was observed under optical microscope with crossed polars.