Investigation of bio-based polyamide with short fibers for lightweight structures

Rinberg, Roman; Hartmann, Tobias; Nikiforov, A.A.; Doynikov, Anton; Вольфсон, С. И.; Kroll, Lothar

doi:10.21935/tls.v1i2.89

Cited by 4 publications

(5 citation statements)

References 13 publications

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“…Conditioning significantly reduced the elastic modulus and tensile strength of the neat PA11 and PA10.10 as well as their bio-WPCs, indicating a softening effect of the absorbed water. However, the overall obtained mechanical properties are not as high as literature data from Feldmann and Bledzki [12] for biogenic composites of PA10.10 and cellulosic fibers or literature data from Rinberg et al [13] for composites of PA10.10 and glass fibers with comparable fiber content. It needs to be stated that in both cases the initial mechanical properties of the reinforcing fibers are expected to be superior to the beech wood particles used in this study.…”

Section: Mechanical Propertiescontrasting

confidence: 62%

Comparative Study on Polyamide 11 and Polyamide 10.10 as Matrix Polymers for Biogenic Wood‐Plastic Composites

Hirsch

Theumer

2022

Macromolecular Symposia

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Biogenic wood‐plastic composites from bio‐based polymers and wood fibers (bio‐WPC) provide an improved sustainability and carbon footprint compared to conventional composites. Recently, such bio‐WPCs from bio‐based polyamides have gained major interest due to their high mechanical and thermomechanical properties. In this study, the resulting mechanical and thermo‐mechanical properties of two bio‐WPCs from polyamide 11 (PA11) and polyamide 10.10 (PA10.10) with a content of 30 wt% of beech wood particles (BP), processed by twin‐screw compounding and subsequent injection molding, are analyzed by tensile testing and dynamic mechanical analysis. For this, two comparable grades of PA11 and PA10.10 are used. It is found that the elastic modulus, tensile strength, and the temperature‐dependent storage modulus of the PA10.10/BP30 are significantly higher as compared to the PA11/BP30 material. These findings are addressed to the different number of amino groups per repeating unit in these polymers, leading to a better adhesion of the matrix and the wood fiber and consequently better mechanical and thermomechanical properties of the PA10.10/BP30. In consequence, bio‐WPCs from PA10.10 should be considered as an interesting alternative with a tendency to higher mechanical and thermomechanical properties in comparison to bio‐WPCs from PA11.

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Section: Mechanical Propertiescontrasting

confidence: 62%

Comparative Study on Polyamide 11 and Polyamide 10.10 as Matrix Polymers for Biogenic Wood‐Plastic Composites

Hirsch

Theumer

2022

Macromolecular Symposia

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“…For example, carbon fibers, in addition to the obvious reinforcement of the material, also provide better tribological properties by reducing the wear rate of the composite material. In contrast, glass fibers enhance the ability to absorb energy during dynamic impact, reducing the brittleness of the material [ 39 , 40 , 41 , 42 ].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Strength and Sustainability: Evaluating Glass and Basalt Fiber-Reinforced Biopolyamide as Alternatives for Petroleum-Based Polyamide Composite

Bednarowski,

Bazan,

Kuciel

2023

Polymers

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This study aims to analyze strength properties and low-cycle dynamic tests of composite materials modified with glass and basalt fibers. Biopolyamide 4.10 was used as the matrix, and the fiber contents were 15, 30, and 50% by weight. Static tensile tests, impact tests, and determination of mechanical hysteresis loops were carried out as strength tests. The length of the fibers in the produced composites and their processing properties were determined. The composite materials were compared with commercially available glass fiber-reinforced composites with 30 and 50% fiber contents. The results showed that such composites can successfully replace composite materials based on petroleum-based polymeric materials, providing high strength properties and reducing the negative environmental impact by using renewable sources. Composites with 30% basalt fiber composition were characterized by higher tensile strength by about 60% compared to commercially available composites with 30% glass fiber composition and an almost doubly increased Young’s modulus. Increasing the content of basalt fibers to 50% results in a further increase in strength properties. Despite the lower tensile strength compared to polyamide 6 with 50% glass fiber content, basalt fibers provided an approximately 10% higher modulus of elasticity.

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“…To our knowledge, there is no research on this topic for PA 10.10. Cellulose [25,26], glass [27,28], basalt [29] and carbon fibers [30] are currently used to reinforce PA 10.10 to improve its properties.…”

Section: Introductionmentioning

confidence: 99%

Influence of Epoxy Functional Chain-Extenders on the Thermal and Rheological Properties of Bio-Based Polyamide 10.10

Erdmann,

Rennert,

Meins

2023

Polymers

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Bio-based polyamide 10.10 (PA 10.10) has excellent properties compared to other bio-based polymers such as polylactic acid (PLA) or polyhydroxyalkanoates (PHAs) and is therefore used in more technical applications where higher strength is required. For foam and filament extrusion, a good balance between strength and stiffness of the polymer is needed. Therefore, two commercial chain-extenders (Joncryl® ADR types) with different epoxy functionalities are used to modify the melt properties of PA 10.10. The chain-extenders are used in a concentration range up to 1.25 wt.%. The range of glass transition temperature widens with increasing Joncryl® content, and the apparent activation energy shows a maximum at a concentration of 0.5 wt.%. Furthermore, the melting temperatures are constant and the crystallinity decreases with increasing chain-extender content due to the formation of branches. During the second heating run, a bimodal melting peak appeared, consisting of α-triclinic and pseudo γ-hexagonal crystals. The weight average molar masses (Mw) measured by gel permeation chromatography (GPC) increased linearly with increasing ADR 4400 content. In contrast, the compounds containing ADR 4468 show a maximum at 0.5 wt.% and it begins to decrease thereafter. The rheological data show an increase in viscosity with increasing chain-extender content due to branch formation. ATR spectra of the compounds show a decrease at the wavelength of the primary (3301 cm−1) and secondary (1634 cm−1) (-NH stretching in PA 10.10) amine, indicating that chain-extension, e.g., branching, takes place during compounding.

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Investigation of bio-based polyamide with short fibers for lightweight structures

Cited by 4 publications

References 13 publications

Comparative Study on Polyamide 11 and Polyamide 10.10 as Matrix Polymers for Biogenic Wood‐Plastic Composites

Comparative Study on Polyamide 11 and Polyamide 10.10 as Matrix Polymers for Biogenic Wood‐Plastic Composites

Enhancing Strength and Sustainability: Evaluating Glass and Basalt Fiber-Reinforced Biopolyamide as Alternatives for Petroleum-Based Polyamide Composite

Influence of Epoxy Functional Chain-Extenders on the Thermal and Rheological Properties of Bio-Based Polyamide 10.10

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