دانلود رایگان مقاله انگلیسی مطالعه قابلیت بازیافت کامپوزیت های پلی پروپیلن تقویت شده با فیبر باگاس - الزویر 2018

abstract

Natural fiber reinforced composites are gaining attention nowadays due to their low cost, biodegradable characteristics, lower density and comparable mechanical properties with synthetic fibers reinforced composites. As the recyclable properties of these composites are still not fully explored and this could be the reason that these are not much used in domestic and other applications to their full potential. In the current experimental investigation, the effects of mechanical recycling on the properties of bagasse fiber reinforced polypropylene composites have been studied. Tensile properties, crystallinity and aspect ratio exhibits an increase, while flexural properties decrease with each recycling step. No significant change in thermal behavior has been detected even after 5 cycles but a slight increase in the hardness has been observed. SEM images confirmed the change in aspect ratio due to crushing of fibers as well as fiber fracture became more dominant after each recycling step.

4. Conclusions

Bagasse fiber reinforced polypropylene composites have been fabricated with extrusion injection molding process and the experimental investigation clearly exhibits the effects of recycling on their mechanical, aspect ratio, surface roughness and crystalline properties. Aspect ratio of fibers increases due to crushing of fiber during recycling, which further contributes to an increase in tensile strength of the composite. The increase in crystallinity led to higher elongation under tensile loads but increase in surface roughness and hardness led to reduction in flexural properties. The thermal decomposition behavior exhibits no significant change even after 5 processing cycles. The current research endeavor reveals that natural fiber based polymer composites preserve their inherent characteristics during recycling without addition of virgin material. Based on the experimental results, it can be concluded that recycled natural fiber reinforced composites have a huge potential to replace traditional plastic used in various applications.