Processing of pre-impregnated thermoplastic towpreg reinforced by continuous glass fibre and recycled PET by pultrusion

Asensio, María; Esfandiari, Púria; Núñez, Karina; Silva, João F.; Marques, António; Merino, Juan Carlos; Pastor, J. M.

doi:10.1016/j.compositesb.2020.108365

Cited by 37 publications

(31 citation statements)

References 21 publications

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“…Recently, the relationship between impregnation and mechanical properties was studied by Saito et al [ 186 ]. At the same time, seeking for a reduction in carbon footprint, Asensio et al [ 187 ] studied the possibility to use recycled material for the pultrusion of thermoplastic composites.…”

Section: Raw Materials and Properties Of Obtained Compositesmentioning

confidence: 99%

“…The main problem associated with the application of recycled composites lies in a degradation of mechanical properties of recycled fibers to be used in newly produced composites [ 374 , 375 ]. On the other hand, striving to minimize carbon footprint, researchers opened a new perspective on the application of polyethylene terephthalate (PET), typically used in worldwide packaging, as a raw material for thermoplastic pultrusion [ 187 ]. Thus, any investigations aimed at application of recycled and natural raw materials in thermoplastic pultrusion will have a good perspective.…”

Section: Applicationmentioning

confidence: 99%

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Thermoplastic Pultrusion: A Review

et al. 2021

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Pultrusion is one of the most efficient methods of producing polymer composite structures with a constant cross-section. Pultruded profiles are widely used in bridge construction, transportation industry, energy sector, and civil and architectural engineering. However, in spite of the many advantages thermoplastic composites have over the thermoset ones, the thermoplastic pultrusion market demonstrates significantly lower production volumes as compared to those of the thermoset one. Examining the thermoplastic pultrusion processes, raw materials, mechanical properties of thermoplastic composites, process simulation techniques, patents, and applications of thermoplastic pultrusion, this overview aims to analyze the existing gap between thermoset and thermoplastic pultrusions in order to promote the development of the latter one. Therefore, observing thermoplastic pultrusion from a new perspective, we intend to identify current shortcomings and issues, and to propose future research and application directions.

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Section: Raw Materials and Properties Of Obtained Compositesmentioning

confidence: 99%

Section: Applicationmentioning

confidence: 99%

Thermoplastic Pultrusion: A Review

et al. 2021

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“…Nevertheless, thermoplastic matrices are highly viscous and have very low polarity, which hinders good impregnation of the matrix into the mesh fiber, forming an incompatible system with low adhesion and thus, producing composites with poor mechanical properties. In the past years, our research group has been working on modifying different thermoplastic matrices to find ways to overcome this issue, through the rheological modification of recycled polyester [ 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Star-Branched Polyamides as the Matrix in Thermoplastic Composites

et al. 2022

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The aim of this study is the preparation of star-shaped branched polyamides (sPA6) with low melt viscosity, but also with improved mechanical properties by reactive extrusion. This configuration has been obtained by grafting a tri-functional, three-armed molecule: 5-aminoisophthalic-acid, used as a linking agent (LA). The balance between the fluidity, polarity and mechanical properties of sPA6s is the reason why these materials have been investigated for the impregnation of fabrics in the manufacture of thermoplastic composites. For these impregnation processes, the low viscosity of the melt has allowed the processing parameters (temperature, pressure and time) to be reduced, and its new microstructure has allowed the mechanical properties of virgin thermoplastic resins to be maintained. A significant improvement in the ultrasonic welding processes of the composites was also found when an energy director based on these materials was applied at the interface. In this work, an exhaustive microstructural characterization of the obtained sPAs is presented and related to the final properties of the composites obtained by film stacking.

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“…These materials differed in their viscosity and flow. The research results were then compared with another pultruded thermoplastic (polypropylene) composite material [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Application of Physical Methods for the Detection of a Thermally Degraded Recycled Material in Plastic Parts Made of Polypropylene Copolymer

et al. 2021

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The paper deals with the possibility of applying physical methods to detect a thermally degraded recycled material in plastic parts made of polypropylene. Standard methods of evaluating the mechanical properties of the material under static tensile and bending stress, as well as under dynamic impact stress using the Charpy method, were used for the experimental measurements. The rheological properties of materials were monitored using a method involving measuring the melt flow index, while their thermal properties and oxidative stability were monitored using differential scanning calorimetry. Based on the methods used, it can be clearly stated that the most suitable technique for detecting thermally degraded recycled material in polypropylene is the method involving establishing the melt flow index. The bending test seems to be the most suitable method for detecting recycled material by measuring the material’s mechanical properties. Similarly to the melt volume flow rate (MVR) method, it was possible to unambiguously detect the presence of even a small amount of recycled material in the whole from measuring the material’s bending properties. It is clear from the results that in the short term, there may be no change in the useful properties of the parts, but in the long term the presence of degraded recycled material will have adverse consequences on their lifespan.

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Processing of pre-impregnated thermoplastic towpreg reinforced by continuous glass fibre and recycled PET by pultrusion

Cited by 37 publications

References 21 publications

Thermoplastic Pultrusion: A Review

Thermoplastic Pultrusion: A Review

Star-Branched Polyamides as the Matrix in Thermoplastic Composites

Application of Physical Methods for the Detection of a Thermally Degraded Recycled Material in Plastic Parts Made of Polypropylene Copolymer

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