Study On Rheology And Properties Of Glass Fiber Reinforced Polycarbonate Recycling Material

The glass fiber content has a crucial influence on the mechanical and rheological properties of glass fiber reinforced polycarbonate composites.Usually,the addition of glass fiber will lead to the decrease of material fluidity and the deterioration of fluidity.For some micro-performance requirements.Structural plastic parts,how to choose a suitable glass fiber content of composite materials for processing is very important.In addition,a large amount of recycled materials are often produced during the processing,and the recycled materials can be appropriately added to the raw materials for reprocessing.Reasonable use of the recycled materials will have a positive impact on production costs and the environment.However,the addition of recycled materials will inevitably lead to changes in the properties of the materials.It is hoped that the general rules of rheological properties and mechanical properties of composites can be obtained by relevant experiments.In this paper,glass fiber reinforced PC was used as the research material,and the composite samples with different glass fiber contents were prepared by injection molding.The tensile tests were carried out on the samples,and the influence of glass fiber content on the rheological properties of the composites was studied at the same time.Based on the above research results,a kind of LED high-cap cornice hood was made by the forming experiment of the microstructure plastic parts.Finally,the effect of recycled material content on tensile strength and rheological properties of composites was studied in order to find a suitable amount of recycled materials to reduce the production cost and improve the material utilization ratio.The results show that the tensile strength and flexural strength of the composites increase with the increase of glass fiber content.Compared with 5% and 20% glass fiber composites,the increase is 62% and 33%,respectively.At the same time,the addition of glass fiber will increase the viscosity of the composite,and the apparent viscosity decreases with the increase of shear stress.When the shear stress is close to 8000 Pa,the apparent viscosity decreases sharply and eventually stabilizes.For the microstructured plastic parts made of glass fiber reinforced polycarbonate,the width of the microchannel decreases as the glass fiber content increases.For pure PC materials,the storage modulus in the low frequency region of 1-2 Hzd has a strong dependence on frequency,that is,the growth rate of storage modulus is the fastest in this frequency range.In the frequency range of 3-10 Hz,the storage modulus exhibits a linear increase with frequency.The loss modulus is a trend in which the curve first increases and then decreases slightly as the frequency increases,and then increases.The addition of recycled materials leads to a decrease in the frequency dependence of the storage modulus of the material,which has a decisive influence on the frequency dependence of the loss modulus.However,for the material to which the recycled material is added,the effect of the recycled material content on the loss modulus is not significant.For the composite materials with PC and glass fiber content of 15%,the viscosity increases with the increase of frequency in the low frequency range of 1-2 Hz.In the frequency range of 2-10 Hz,the viscosity decreases with the increase of frequency.At the same time,the content of recycled materials has an important effect on the mechanical damping factor of composites.On the other hand,the tensile strength of the material decreases first and then increases with the increase of the content of recycled material,and the turning point is that the content of recycled material is about 75%.The results show that adding about 25% recycled material to LED high cap eaves has good flowability and high product yield while satisfying the performance requirements at the same time.The results show that the recycled materials with 25% or so can meet the performance requirements at the same time it shows good fluidity and high finished product rate.