This paper aims at studying the effect of recycling on the static and dynamic properties of short alfa fibre reinforced polypropylene.For this purpose,alfa fibres reinforced composites were elaborated by an injection ...This paper aims at studying the effect of recycling on the static and dynamic properties of short alfa fibre reinforced polypropylene.For this purpose,alfa fibres reinforced composites were elaborated by an injection moulding process and were subjected to different mechanical recycling cycles.Then,non-recycled and recycled materials were subjected to static tests and Dynamic Mechanical Analysis(DMA)to evaluate the effect of recycling on their behaviour.Besides,the effects of alkali and salt water treatments on the static and dynamic properties of the alfa composite were also investigated.The obtained results show that tensile and flexural properties of alfa fibres reinforced composites decrease during recycling cycles.Moreover,the recycling induces a drop in the storage modulus and enhances the loss factor of these composites.The composites with alfa fibre especially the alkali treated composite show the same resistance to recycling as composites with hemp fibres.Further,SEM observations indicate a decrease in the fibres dimension with the recycling cycles,especially for alfa fibres,which can explain the decrease in the properties of the alfa composite during recycling operations.展开更多
文摘This paper aims at studying the effect of recycling on the static and dynamic properties of short alfa fibre reinforced polypropylene.For this purpose,alfa fibres reinforced composites were elaborated by an injection moulding process and were subjected to different mechanical recycling cycles.Then,non-recycled and recycled materials were subjected to static tests and Dynamic Mechanical Analysis(DMA)to evaluate the effect of recycling on their behaviour.Besides,the effects of alkali and salt water treatments on the static and dynamic properties of the alfa composite were also investigated.The obtained results show that tensile and flexural properties of alfa fibres reinforced composites decrease during recycling cycles.Moreover,the recycling induces a drop in the storage modulus and enhances the loss factor of these composites.The composites with alfa fibre especially the alkali treated composite show the same resistance to recycling as composites with hemp fibres.Further,SEM observations indicate a decrease in the fibres dimension with the recycling cycles,especially for alfa fibres,which can explain the decrease in the properties of the alfa composite during recycling operations.
