Tensile behaviors of polyamide 6/UHLE blends

Liu, Hongjun; Fu, Zhuo; Jing, Bo; Shi, Jian Gao; Zou, Xiaoxuan; Dai, Wei

doi:10.1007/s10853-009-3494-8

Cited by 8 publications

(5 citation statements)

References 22 publications

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“…The first stage is the materials' mechanical recycling, which encompasses three steps: cleaning, grinding, and drying. Drying is a crucial step because the moisture has influence in the mechanical properties of PA 6 [9]. The second stage consists of specimens and cardholders' injection moulding process.…”

Section: Methodsmentioning

confidence: 99%

Analysis of the Feasibility of Producing Injection Moulded Components from Mechanically Recycled Fishing Nets

Costa,

Magrinho,

Caseiro

et al. 2023

KEM

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Global plastic production and consumption have increased due to its outstanding properties. Their widespread use is cause for concern, as most plastics deteriorate but never fully decompose, posing a risk to ecosystems. A large source of ocean plastic waste is "ghost gear", a result of intentional or accidental abandonment of fishing gear at sea. To reduce their impact, mechanical recycling is considered a viable option as it is an efficient recycling method in terms of time, cost-effectiveness, and environmental impact. This study aims to investigate the feasibility of producing injection moulded components from recycled fishing nets composed of polyamide 6 (PA6). The degradation in a marine environment allied with the mechanical recycling process was evaluated by comparing the physical and mechanical properties of injection moulded specimens of both recycled fishing nets and commercially available extruded PA6 plates. In addition, both materials were subjected to an additional mechanical recycling step (after the injection) to determine the impact on the properties of additional recycling cycles. Finally, the feasibility of injection moulding of cardholders was also studied. The physical and mechanical characterization concluded that the property values obtained in the tensile test and the density measurements of the recycled fishing nets are within the range of values established for the properties of an extruded, non-recycled PA 6, and that the effect of the second recycling on its properties was negligible. The marine degradation had a more significant impact on the tensile properties and Charpy notched impact strength than on the hardness and density values.

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Section: Methodsmentioning

confidence: 99%

Analysis of the Feasibility of Producing Injection Moulded Components from Mechanically Recycled Fishing Nets

Costa,

Magrinho,

Caseiro

et al. 2023

KEM

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“…A detailed description of the Unified SCP (USCP) model, including full mathematical formula derivation, can be found in Reference [ 29 ]. The USCP model was developed in response to the observation of a double yield phenomenon in SCPs, as documented in References [ 37 , 38 , 39 ]. In this study, the USCP model was applied directly to pure HDPE, PP, and the PP/HDPE blend.…”

Section: Thermomechanical Modelingmentioning

confidence: 99%

Advancing the Characterization of Recycled Polyolefin Blends with a Combined Experimental and Numerical Approach to Thermomechanical Behavior

Hao,

Siebers,

Ragaert

et al. 2024

Polymers

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The blending of polyolefins (POs), such as polyethylene (PE) and polypropylene (PP), is a growing area of research, particularly for recycling mixed polyolefin (MPO) waste through flotation sorting techniques. However, understanding the thermomechanical behavior of these recycled blends is challenging due to limitations in the existing characterization methods. This paper introduces a combined experimental and numerical method to accurately assess the complex mechanical behavior of high-density PE, PP, and their blends. We conducted detailed thermomechanical analyses using a high-speed stereo digital image correlation (DIC) system paired with an infrared camera to capture temperature variations alongside mechanical stress and strain. This approach allowed us to correct for distortions caused by necking and to derive accurate stress–strain relationships. We also applied a cutting-edge unified semi-crystalline polymer (USCP) model to simplify the analysis, focusing on the effects of strain rate and temperature, including self-heating and thermal softening phenomena. Our results, which closely match experimental observations of stress–strain behavior and temperature changes, offer new insights into the thermomechanical properties of PO blends, which are essential for advancing their practical applications in various fields.

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“…The double yield (DY) phenomenon has been reported for polyamide (PA) [3,[12][13][14][15][16][17], polytrimethyleneterephthalate (PTT), polybutyleneterephthalate (PBT) [18] and polyethylene (PE) [19][20][21][22]. Fig.…”

Section: Introductionmentioning

confidence: 99%

“…The underlying DY phenomenon can be clearly observed within a SCP with a specific diameter of spherulite [11] and under certain conditions, for instance, high strain rate, low temperature [29] or low moisture content [15]. Also, Luo et al [13] studied the effect of water and thermal treatment on the DY phenomenon of PA6 blends and neat PA6 in tension. Nitta and Kuriyagawa [30] studied DY phenomenon of a metallocene-catalyzed HDPE in tension using catastrophe theory.…”

Section: Introductionmentioning

confidence: 99%

A rate-dependent constitutive model predicting the double yield phenomenon, self-heating and thermal softening in semi-crystalline polymers

Hao

Laheri

Dai

et al. 2022

International Journal of Plasticity

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Tensile behaviors of polyamide 6/UHLE blends

Cited by 8 publications

References 22 publications

Analysis of the Feasibility of Producing Injection Moulded Components from Mechanically Recycled Fishing Nets

Analysis of the Feasibility of Producing Injection Moulded Components from Mechanically Recycled Fishing Nets

Advancing the Characterization of Recycled Polyolefin Blends with a Combined Experimental and Numerical Approach to Thermomechanical Behavior

A rate-dependent constitutive model predicting the double yield phenomenon, self-heating and thermal softening in semi-crystalline polymers

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