A tensile modulus of 3.4 GPa is obtained for 50 wt.% filled PP while for 50 wt.% MAPP, it is around 4 GPa. The tensile strength and modulus of bamboo-reinforced MAPP increase with increasing content up to 65 wt.% ( Fig. 6.2.2.1 Effect of maleated PP on mechanical properties of compositesīamboo fiber-reinforced maleated PP composites having bamboo fibers of different sizes (<500 µm, 500–850 µm, 850 µm to 1 mm, and <2 mm) show different mechanical properties. The WAXD pattern of bamboo shows no peak between 2 θ=10 and 20°. The pattern of the pure PP and PP composites indicates a new peak located at 2 θ=16° which is the characteristic single β-form peak (300). This is confirmed by wide angle X-ray diffraction (WAXD) patterns that show three strong equatorial α-form peaks of PP or PP sequences at (110), (040), and (130). Bamboo fibers act as a nucleating agent for PP, s-MAPP, and m-MAPP in the composites. The higher cooling crystallization temperature T c values of the composites indicate a rapid crystallization rate of the composites due to the nucleation effect of the bamboo fiber. The DSC curves obtained at a cooling rate of 10☌/min show exothermic peaks at 107☌, 109☌, and 116☌, respectively, for pure PP, s-MAPP, and m-MAPP which shift to 110☌, 114☌, and 117☌ for composites based on them. This indicates that a β-phase structure is formed in all the three kinds of bamboo fiber-filled PP composites. The endothermic peak in the differential scanning calorimetry (DSC) curve of PP, s-MAPP, and m-MAPP at 169☌, corresponding to the melting of its α-crystalline phase, is accompanied by a second endothermic peak at 152☌, 150☌, and 150☌, respectively, for composites. The interaction between the polypropylene (PP) matrix and bamboo fiber is promoted by using maleated PP (s-MAPP and m-MAPP). Navin Chand, Mohammed Fahim, in Tribology of Natural Fiber Polymer Composites (Second Edition), 2021 6.2.2 Bamboo–thermoplastic compositesīamboo fiber-reinforced polymer composites should be lightweight and possess good weathering ability, good design and manufacture flexibility, and medium strength for indoor applications such as in the furniture and construction industries.
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