Comparison of Mechanical Properties and Water Absorption Test on Injection Molding and Extrusion - Injection Molding Thermoplastic Hemp Fiber Composite

Siva, R.; Nemali, Shyam Sundar Reddy; kunchapu, Siva Kishore; Gokul, K.; Kumar, Tarun

doi:10.1016/j.matpr.2021.05.189

Cited by 25 publications

(20 citation statements)

References 13 publications

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“…The samples produced by the extrusion method were found to have higher mechanical strength and better bonding with the matrix than the injection method, and their mechanical properties showed superior performance by approximately 17%. 1 Therefore, in our study, a twin-screw extruder (Polmak Plastik 22 mm Lab type research extruder) was used for composite production. The temperature values for the five zones in the extruder were determined using the literature and the product catalog of the materials (195 °C-215 °C-225 °C-225 °C-240 °C).…”

Section: Materials and Production Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…Extrusion and injection molding processes are frequently used in the production of chopped fiber reinforced polymer composites. 1 In general, high fiber content is required to obtain a high-performance composite. Therefore, the influence of fiber content on the mechanical properties of composites is particularly important.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of the mechanical properties of chopped glass, carbon, and aramid fiber reinforced polypropylene

Arı

Bayram

Karahan

et al. 2022

Polymers and Polymer Composites

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In this work, a comparative assessment of the mechanical properties of chopped glass-carbon-aramid fiber reinforced polypropylene (PP) composites was carried out. Reinforcement and matrix materials were mixed with the extrusion method, and then composite materials were produced in the form of plates with the press molding technique. The composites' tensile, 3-point bending, and drop weight tests were carried out and the surface morphology of the fractured surfaces was examined by Scanning Electron Microscope (SEM). The tests’ results indicate that the mechanical properties increase significantly in the presence of fiber. On the other hand, it is observed that the effect in percentage decreases as the fiber content increases. Moreover, It was observed that some of the fiber materials were pulled out from the matrix as a result of stress. ANOVA analysis using S/N values, and F-Test were performed to observe the effectiveness of each test factor (fiber type, and fiber additive content) on the test results. Finally, an optimization study was carried out to obtain the mathematical expression by fitting the experimental data.

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Section: Materials and Production Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Comparison of the mechanical properties of chopped glass, carbon, and aramid fiber reinforced polypropylene

Arı

Bayram

Karahan

et al. 2022

Polymers and Polymer Composites

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“…• injection forming and • extrusion -thermoplastic injection forming. [13] Fiber materials most commonly used in composite manufacturing:…”

Section: Composite Materialsmentioning

confidence: 99%

The Application of Hemp in Bioeconomy

Teirumnieka

Blumberga²,

Teirumnieks³

2021

ETR

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Global trends in the world are currently representing a serious incentive to bring ‘green thinking’ to life. This is the case of replacing synthetic materials derived from fossil resources with natural-origin, renewable resources. In the automotive industry and other segments of the manufacturing industry, increasing attention is being paid to the use of natural fibers in the manufacturing of composite materials. For example, flax and hemp fiber, as reinforcing material, is starting to widely replace carbon fiber. It is not just an ecological benefit, but also an important product protecting human health, since the amount of emissions that pollute the environment is minimized. Consequently, that lead to reduced intake by human being of harmful substances that would affect its health status. Existing composite materials used in motor vehicles, produced from carbon fibers, are creating very sharp fracture areas in the event of accidents causing human injury, while materials from natural fiber plants in this case are free from sharp edges at the place of fracture. Raw materials derived from hemp processing are used in the automotive, textile industry, construction (hemp concrete, heat insulation material), energy, biofuel production, arts and design, paper production, food, medicine, etc. This paper covers the main types of products derived from hemp.

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“…While, it is limited to high fluidity of liquid, which is hard for PEKK matrix, even in a high temperature above its melting temperature. Extrusion injection moulding 12 is a highly efficient, continuous, low-cost forming technology for polymeric composites, but the cost of equipment and moulds is high. With the development of additive manufacturing 13 , 14 , 3D printing technology 15 , 16 has been developed to a large extent, and it is gradually applied to the medical field, printing human organs, etc.…”

Section: Introductionmentioning

confidence: 99%

Mechanical performance of graphenex/poly(ether ketone ketone) composite sheets by hot pressing

Wang

Jia

Pei

et al. 2022

Sci Rep

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Polymer composites are gradually replacing traditional metal materials in the fields of aviation, aerospace, automotive and medicine due to their corrosion resistance, light weight and high strength. Moulding technology and organization morphology of polymer composite are key elements affecting the quality of products and their application, so a vacuum hot pressing process for graphenex/poly(ether ketone ketone) (PEKK) (x = 0%, 2%, 3%, 4%, 5%, 6%) composite powders is explored with particularly designed moulding parameters to achieve high conductive properties and good mechanical properties in graphene/PEKK composite sheet with thickness of 1.25 mm and diameter of 80 mm. The vacuum environment ensures that the graphene is not oxidized by air during hot pressing molding, which is essential for achieving conductive property in the graphene/PEKK composite; The hot pressing temperature of each graphene/PEKK composite powder is higher than glass transition temperature but lower than melting temperature, which ensures the graphene/PEKK composite powders is fully compacted and then graphene is fully lapped in the composite sheet. In addition, the graphene/PEKK composite sheet shows conductive property when the graphene content increases to 3wt%, and then the conductivity of the composites increases and then decreases with a peak value at 5wt% with increasing graphene content. By comparing the mechanical properties and microstructure morphology of the graphene/PEKK composite sheets, it was obtained that graphene content has an obvious effect on the mechanical properties of the composites, e.g., the mechanical properties will be increased as the graphene content increasing when graphene content is more than 3%. The graphene distribution law of the composite material with different graphene contents is analysed using a scanning electron microscope (SEM).

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Comparison of Mechanical Properties and Water Absorption Test on Injection Molding and Extrusion - Injection Molding Thermoplastic Hemp Fiber Composite

Cited by 25 publications

References 13 publications

Comparison of the mechanical properties of chopped glass, carbon, and aramid fiber reinforced polypropylene

Comparison of the mechanical properties of chopped glass, carbon, and aramid fiber reinforced polypropylene

The Application of Hemp in Bioeconomy

Mechanical performance of graphenex/poly(ether ketone ketone) composite sheets by hot pressing

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