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This paper presents the obtaining and the characterization of composites with polypropylene matrix and hemp shives as filler in different ratios and containing poly(propylene)-co maleic anhydride (MAH-PP) 3% wt as compatibility agent. The weathering behavior of the composite enclosing 60% hemp shives, performed after the exposure to UV radiations at different exposure times, was evaluated. The changes in the chemical and morphological structures were investigated by FT-IR and RAMAN spectroscopies and AFM microscopy. The mechanical characteristics of the composites were determined before and after an artificial aging process, and they are within the limits of the values reported for polyolefin-based composites and materials with natural fillers. During the accelerated weathering process, the correlation between the chemical degradation of the main components of the composite and the modification of the mechanical properties after the process of aging has been observed.

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This paper presents a comparative study regarding the impact behavior between two biocomposites with different matrices, polypropylene and furan resins, reinforced with the same volume fractions of hemp shives. Also the paper analyzes the influence of the volume fraction of the hemp shives on the impact properties of polypropylene-based biocomposites. A comparison of the impact properties for these biocomposites is made in order to show which type of biocomposite is more suitable to be used in terms of impact properties in different areas of use.