Thermoformability characterisation of Flax reinforced polypropylene composite materials

Dobah, Yousef; Zampetakis, Ioannis; Ward, Carwyn; Scarpa, Fabrizio

doi:10.1016/j.compositesb.2019.107727

Cited by 16 publications

(13 citation statements)

References 36 publications

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“…In addition, the fibers are, in many cases, completely covered by the matrix reinforced with GNPs (Figure 9d). It is interesting to note that the tensile and flexural moduli of these composites are higher than those reported in literature for flax/PP composites [10,50,51] when considering similar fiber volume fractions, even higher than low-twisted and unidirectional MAPP-treated flax yarns in a polypropylene matrix, for which a tensile modulus of 9.26 ± 0.4 GPa was reported [52]. In addition, the tensile and flexural strength values are comparable with those of similar unidirectional composites [52].…”

Section: Characterization Of Composites Reinforced With Flax Fabrics supporting

confidence: 60%

“…Goudenhooft et al [7] recently showed that tensile properties of flax fibers are not significantly affected over time, regardless of the fiber yield and variety, and that the resulting dispersion in the specific mechanical properties is in the same range as that of glass fibers. Another significant issue is related to the processing conditions of the composites (temperature, dwell time, pressure), which have a major impact on the final mechanical properties, especially for thermoplastic-based composites [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…In particular, polypropylene (PP) is one of the most widely used polyolefins. Its low density, low price, good mechanical properties, good processability, and recyclability make it a popular material as a matrix for natural fiber composites [10,36,37]. Flax fibers currently account for about half of the natural fibers used in automotive applications, followed by kenaf and hemp [4], and the combination of PP/flax has been widely investigated in literature, highlighting the dramatic incompatibility between these two constituents.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Carbon Nanostructures and Fatty Acid Treatment on the Mechanical and Thermal Performances of Flax/Polypropylene Composites

et al. 2020

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Four different strategies for mitigating the highly hydrophilic nature of flax fibers were investigated with a view to increase their compatibility with apolar polypropylene. The effects of two carbon nanostructures (graphene nanoplatelets (GNPs) and carbon nanotubes (CNTs)), of a chemical modification with a fatty acid (stearic acid), and of maleated polypropylene on interfacial adhesion, mechanical properties (tensile and flexural), and thermal stability (TGA) were compared. The best performance was achieved by a synergistic combination of GNPs and maleated polypropylene, which resulted in an increase in tensile strength and modulus of 42.46% and 54.96%, respectively, compared to baseline composites. Stearation proved to be an effective strategy for increasing the compatibility with apolar matrices when performed in an ethanol solution with a 0.4 M concentration. The results demonstrate that an adequate selection of surface modification strategies leads to considerable enhancements in targeted properties.

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Section: Characterization Of Composites Reinforced With Flax Fabrics supporting

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Carbon Nanostructures and Fatty Acid Treatment on the Mechanical and Thermal Performances of Flax/Polypropylene Composites

et al. 2020

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“…Very few works aimed on the use of fabrics are available, one of these is the work of Dobah et al [32]. They studied the properties of flax fabrics/polypropylene (PP) composites produced by compression moulding using special commingled fabrics.…”

Section: Introductionmentioning

confidence: 99%

Production of PP Composites Reinforced with Flax and Hemp Woven Mesh Fabrics via Compression Molding

2021

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Hemp and flax fibers are among the most interesting vegetable fibers that can be used to reinforce polymeric matrices. In line with the global environmental requests, the use of these fibers especially coupled with thermoforming polymers are increasing more and more in order to expand their applications and replace synthetic fibers and thermosetting plastics. However, one of the major limitations of vegetable fibers is their poor adhesion with polymeric matrices that is often overcome by fibers chemical treatments or by using coupling agents within the matrix. Aiming to produce polypropylene (PP) bio composite laminates reinforced by hemp and flax fibers without additional process steps, this paper deals on the study of their production via the compression molding technique by using woven fabrics characterized by a large mesh size able to ensure a mechanical anchoring between fibers and matrix. Two different forming strategies that differ in the time required for reaching the maximum values of compression pressure and in the dwelling time at this value were used in order to investigate how the yarn impregnation was affected by them. To expand the applications of composites under investigation, tensile, bending, Izod, heat deflection temperature (HDT) and bearing tests were carried out. The results highlighted how the use of a waiting time before the reaching of the maximum moulding pressure allowed a better matrix flow within the vegetable yarn leading to higher mechanical performances.

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“…Dobah ve ark. [15] keten takviyeli polipropilen kompozit malzemelerin termoform süreci üzerine çalışmıştır. Sıcaklık, kalma süresi, basınç ve fabrikasyon alanına ait parametrelere karşılık keten/PP laminatların mekanik ve estetik performansında nem emilimini incelemişlerdir.…”

Section: Introductionunclassified

Optimization of plastic thermoform process with adaptive response surface methodology: a case study at Sahlan Plastic Co.

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et al. 2021

Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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In this study, optimization of plastic thermoforming process is considered. For this purpose, thermoform cup forming process of Sahlan Plastic Company operating in Balıkesir Industrial Zone was optimized by using Adaptive Response Surface Methodology (ARSM). This method is an optimization method by dealing with controllable variables and uncontrollable variables together. During the application phase of the study, the production of 200 ml white buttermilk glasses was discussed. Zone temperatures (4 different zones), mold speed, inlet water temperature, ambient temperature, coil cooling time are used as the factors, while the cup weights were measured as the output (response) and 48 observation values were taken. The relationship between weight and these factors affecting the weight is modeled with the regression equation. To determine whether the model is significant, the results for the coefficient of determination (R 2 ) and ANOVA analysis were examined. Then, for this model -which is found to be significant -the optimized production process parameters were determined, giving the weight of 5 g.

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Thermoformability characterisation of Flax reinforced polypropylene composite materials

Cited by 16 publications

References 36 publications

Effect of Carbon Nanostructures and Fatty Acid Treatment on the Mechanical and Thermal Performances of Flax/Polypropylene Composites

Effect of Carbon Nanostructures and Fatty Acid Treatment on the Mechanical and Thermal Performances of Flax/Polypropylene Composites

Production of PP Composites Reinforced with Flax and Hemp Woven Mesh Fabrics via Compression Molding

Optimization of plastic thermoform process with adaptive response surface methodology: a case study at Sahlan Plastic Co.

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