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Journal articles on the topic 'Polyamide 11 (PA11)'

Author: Grafiati

Published: 15 February 2025

Last updated: 31 July 2025

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1

Bahrami, Mohsen, Juana Abenojar, and Miguel Angel Martínez. "Comparative Characterization of Hot-Pressed Polyamide 11 and 12: Mechanical, Thermal and Durability Properties." Polymers 13, no. 20 (2021): 3553. http://dx.doi.org/10.3390/polym13203553.

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Chemically speaking, polyamide 11 (PA11) and polyamide 12 (PA12) have a similar backbone, differing only in one carbon. From an origin point of view, PA11 is considered a bioplastic polyamide composed from renewable resources, compared to oil-based PA12. Each of them has a number of advantages over the other, which makes their selection a challenging issue. Depending on the target application, diverse assessments and comparisons are needed to fulfill this mission. The current study addresses this research gap to characterize and compare PA11 and PA12 manufactured by the hot press technique in

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2

Đinh, Thế Dũng, Nguyen Tran Hung, Le Minh Tri, Le Huu Dat, Nguyen Vu Giang, and Pham Thi Thanh Nhan. "Study on the development of 3D printing materials based on blend of polyamide 6 and polyamide 11." Journal of Military Science and Technology 102 (April 15, 2025): 101–8. https://doi.org/10.54939/1859-1043.j.mst.102.2025.101-108.

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3D printed CF/PA6+PA11 filaments are created from a blend of BASF's polyamide 6 (PA6), Arkema's polyamide 11 (PA11), and carbon fibers from Toray (Japan). This study focuses on evaluating the blend ratios of PA6, PA11, and the composite ratios of the blend with carbon fibers in the production of 3D printed filaments. Key technical parameters such as tensile strength, flexural strength, and impact strength were measured to assess mechanical performance under filament fabrication conditions. The study determined that a blend ratio of 70:30 for PA6:PA11 provides the best compatibility. Based on t

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Lao, S. C., J. H. Koo, T. J. Moon, et al. "Flame-retardant polyamide 11 nanocomposites: further thermal and flammability studies." Journal of Fire Sciences 29, no. 6 (2011): 479–98. http://dx.doi.org/10.1177/0734904111404658.

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Polyamide (nylon) 11 (PA11) were melt-blended by dispersing low concentrations of nanoparticles (NPs), namely nanoclays (NCs) and carbon nanofibers (CNFs) via twin-screw extrusion. To enhance their thermal and flame retardant (FR) properties, an intumescent FR additive was added to the mechanically superior NC and CNF PA11 formulations. For neat and NP-reinforced PA11 as well as for PA11 reinforced by both intumescent FR and select NPs (NC or CNF), decomposition temperatures by TGA, flammability properties by UL 94, and cone calorimetry values were measured. All PA11 polymer systems infused wi

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Khan, Zahid Iqbal, Zurina Binti Mohamad, Abdul Razak Bin Rahmat, Unsia Habib, and Nur Amira Sahirah Binti Abdullah. "A novel recycled polyethylene terephthalate/polyamide 11 (rPET/PA11) thermoplastic blend." Progress in Rubber, Plastics and Recycling Technology 37, no. 3 (2021): 233–44. http://dx.doi.org/10.1177/14777606211001074.

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This work explores a novel blend of recycled polyethylene terephthalate/polyamide 11 (rPET/PA11). The blend of rPET/PA11 was introduced to enhance the mechanical properties of rPET at various ratios. The work’s main advantage was to utilize rPET in thermoplastic form for various applications. Three different ratios, i.e. 10, 20 and 30 wt.% of PA11 blend samples, were prepared using a twin-screw extruder and injection moulding machine. The mechanical properties were examined in terms of tensile, flexural and impact strength. The tensile strength of rPET was improved more than 50%, while the inc

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Wang, Sheng Qin, Mohit Sharma, and Yew Wei Leong. "Polyamide 11/Clay Nanocomposite Using Polyhedral Oligomeric Silsesquioxane Surfactants." Advanced Materials Research 1110 (June 2015): 65–68. http://dx.doi.org/10.4028/www.scientific.net/amr.1110.65.

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This paper reports polyamide 11 (PA11)/layered silicate (clay) nanocomposite using polyhedral oligomeric silsesquioxane (POSS) surfactants. POSS functionalized with amino, ammonium and guanidinium groups were synthesized and used to facilitate the intercalation of polymer chains between silicate layers thereby to improve the dispersion of clay in polymer matrix. Nanocomposites from the blends of POSS-modified clay and PA11 were thus formulated via melting compounding and their mechanical and physical properties were characterized.

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Lods, Louise, Tutea Richmond, Jany Dandurand, et al. "Continuous Bamboo Fibers/Fire-Retardant Polyamide 11: Dynamic Mechanical Behavior of the Biobased Composite." Polymers 14, no. 2 (2022): 299. http://dx.doi.org/10.3390/polym14020299.

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A biobased composite was generated from bamboo fibers (BF) and a polyamide 11 (PA11) matrix. In order to fulfill security requirements, a PA11 already containing a flame retardant (FR) was chosen: This matrix is referred as PA11-FR. In this work, the effects of flame retardant (melamine cyanurate) on the composite properties were considered. In the calorimetric study, the glass transition and melting temperatures of PA11-FR were the same as those of PA11. The melamine cyanurate (MC) had no influence on these parameters. Thermogravimetric analysis revealed that PA11-FR was less stable than PA11

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Gunputh, Urvashi F., Gavin Williams, Marzena Pawlik, Yiling Lu, and Paul Wood. "Effect of Powder Bed Fusion Laser Sintering on Dimensional Accuracy and Tensile Properties of Reused Polyamide 11." Polymers 15, no. 23 (2023): 4602. http://dx.doi.org/10.3390/polym15234602.

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Polyamide 11 (PA11) is a plant-based nylon made from castor beans. Powder bed fusion laser sintering (PBF-LS) is an additive manufacturing process used for PA11 which allows for the reuse of the unsintered powder. The unsintered powder is mixed with virgin powders at different refresh rates, a process which has been studied extensively for most semi-crystalline polyamides. However, there is lack of information on the effect of using 100% reused PA11 powder and the effect of the number of times it is reused on its own, during powder bed fusion laser sintering. This paper investigates the effect

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Oulmou, F., A. Benhamida, A. Dorigato, A. Sola, M. Messori, and A. Pegoretti. "Effect of expandable and expanded graphites on the thermo-mechanical properties of polyamide 11." Journal of Elastomers & Plastics 51, no. 2 (2018): 175–90. http://dx.doi.org/10.1177/0095244318781956.

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The preparation and thermo-mechanical characterization of composites based on polyamide 11 (PA11) filled with various amounts of both expandable and expanded graphites are presented. Investigation conducted using X-ray diffraction (XRD), scanning electron microscopy and surface area analyses indicated how graphite expanded under the selected processing conditions. The XRD analysis on PA11/graphite composites revealed no change in the crystal form of the PA11, while the presence of diffraction peaks associated to the graphite-stacked lamellae can be still detected. All the investigated composit

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Li, Yongjin, Yuko Iwakura, and Hiroshi Shimizu. "Crystal Form and Phase Structure of Poly(vinylidene fluoride)/Polyamide 11/Clay Nanocomposites by High-Shear Processing." Journal of Nanoscience and Nanotechnology 8, no. 4 (2008): 1714–20. http://dx.doi.org/10.1166/jnn.2008.18235.

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Polyamide 11 (PA11)/clay, Poly(vinylidene fluoride) (PVDF)/clay and PVDF/PA11/clay nanocomposites were prepared by melt processing using a high shear extruder. Two types of organoclay with different modified alkyl tails and different polarities were used for PA11 and PVDF nanocomposites. PA11 nanocomposites derived from an organoclay having one alkyl tail show a well-exfoliated morphology but no crystal form transformation, whereas those derived from an organoclay having two alkyl tails give a little worse clay dispersion with the clear α to γ crystal form transition with the addition of the c

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10

Sahnoune, Mohamed, Mustapha Kaci, Aurélie Taguet, et al. "Tribological and mechanical properties of polyamide-11/halloysite nanotube nanocomposites." Journal of Polymer Engineering 39, no. 1 (2018): 25–34. http://dx.doi.org/10.1515/polyeng-2018-0131.

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AbstractThis article reports some morphological, tribological, and mechanical data on polyamide-11(PA11)/halloysite nanotube (HNT) nanocomposites prepared by melt-compounding. HNTs extracted from the Djebel Debbagh deposit in Algeria were incorporated into the polymer at 1, 3, and 5 wt%. For comparison, commercial HNTs were also used under the same processing conditions. Scanning electron microscopy showed that both HNTs were homogeneously dispersed in the PA11 matrix, despite the presence of few aggregates, in particular at higher filler contents. The tribological properties were significantl

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Tey, Wei Shian, Chao Cai, and Kun Zhou. "A Comprehensive Investigation on 3D Printing of Polyamide 11 and Thermoplastic Polyurethane via Multi Jet Fusion." Polymers 13, no. 13 (2021): 2139. http://dx.doi.org/10.3390/polym13132139.

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Multi Jet Fusion (MJF) is a recently developed polymeric powder bed fusion (PBF) additive manufacturing technique that has received considerable attention in the industrial and scientific community due to its ability to fabricate functional and complex polymeric parts efficiently. In this work, a systematic characterization of the physicochemical properties of MJF-certified polyamide 11 (PA11) and thermoplastic polyurethane (TPU) powder was conducted. The mechanical performance and print quality of the specimens printed using both powders were then evaluated. Both PA11 and TPU powders showed i

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Sergi, Claudia, Libera Vitiello, Pietro Russo, Jacopo Tirillò, and Fabrizio Sarasini. "Toughened Bio-Polyamide 11 for Impact-Resistant Intraply Basalt/Flax Hybrid Composites." Macromol 2, no. 2 (2022): 154–67. http://dx.doi.org/10.3390/macromol2020010.

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The automotive sector covers almost 40% of polyamide (PA) total demand. A suitable solution to improve the sustainability of this sector is the exploitation of PA matrices sourced from renewable origins, such as PA11, and their reinforcement with natural fibers such as vegetable flax and mineral basalt. A preliminary study on the quasi-static properties of PA11-based composites reinforced with an intraply flax/basalt hybrid fabric demonstrated their feasibility for semi-structural purposes in the transportation field, but their application needs to be validated against dynamic loading. In this

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13

Zhu, Feichao, Bin Yu, Juanjuan Su, and Jian Han. "Study on PLA/PA11 Bio-Based Toughening Melt-Blown Nonwovens." Autex Research Journal 20, no. 1 (2020): 24–31. http://dx.doi.org/10.2478/aut-2019-0002.

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AbstractWith aim to improve the mechanical and thermal properties of poly (lactic acid) (PLA) melt-blown nonwovens (MBs), polyamide 11 (PA11) was melt blended with PLA at the weight proportions of PLA/PA11 (95/5, 90/10, 85/15, 80/20), and the corresponding PLA/PA11 MBs were also manufactured. The crystallization, thermal and rheological behaviors of PLA/PA11 blends were investigated. PLA/PA11 MBs were also characterized by morphology and mechanical properties. The results indicated that PA11, as globular dispersed phases, formed confined crystals and could improve the thermal stability of PLA

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Do, Van Cong, Vu Giang Nguyen, Huu Trung Tran, et al. "Novel research on polyamide 11 nanocomposites reinforced by Titania nanoparticle deposited jute fibres." Vietnam Journal of Science and Technology 60, no. 6 (2022): 1032–43. http://dx.doi.org/10.15625/2525-2518/16554.

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The combination of jute fibres and polyamide 11 (PA11) to produce full biocomposites is expectance of scientists due to many benefits of both these materials such as high mechanical performances and environmentally friendly behaviors. Unfortunately, there is scarce published research on these bicomposites uptil now. In order to improve the interfacial interaction and adhesion between jute fibres and PA11 resin matrix, an important key in the fabrication of the composites. In this study, a combination of alkaline treatment and Tetraisopropyl orthotitanate (Tip) modification was employed to modi

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Hongsriphan, Nattakarn, Kantika Somboon, Chutikan Paujai, and Thitichaya Taengto. "Mechanical Enhancement and Thermal Stability of Composites between Polyamide 11 and Functionalized Graphene Nanoplatelets." Key Engineering Materials 858 (August 2020): 59–65. http://dx.doi.org/10.4028/www.scientific.net/kem.858.59.

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The composites between polyamide 11 (PA11) and functionalized graphene nanoplatelets (GNP) were prepared to compare influence of GNPs content and functionalities; hydroxyl (GO) and carboxylic acid (GC); on mechanical and thermal properties. The composites were melt compounded and injection molded into specimens with the final GNP content of 1, 3, 5, 7 and 9 wt%. It was found in XRD that these plasma-exfoliated GNPs acted as the nucleating agents that changed the crystal form of PA11, but did not have significant influence on crystallinity content. DSC analysis confirmed the nucleating effect o

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16

Fazli, Ali, and Denis Rodrigue. "Biosourced Poly(lactic acid)/polyamide-11 Blends: Effect of an Elastomer on the Morphology and Mechanical Properties." Molecules 27, no. 20 (2022): 6819. http://dx.doi.org/10.3390/molecules27206819.

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Fully biobased polylactide (PLA)/polyamide-11 (PA11) blends were prepared by melt mixing with an elastomer intermediate phase to address the low elasticity and brittleness of PLA blends. The incorporation of a biobased elastomer made of poly(butylene adipate-co-terephthalate) (PBAT) and polyethylene oxide (PEO) copolymers was found to change the rigid interface between PLA and PA11 into a much more elastic/deformable one as well as promote interfacial compatibility. The interfacial tension of the polymer pairs and spreading coefficients revealed a high tendency of PEO to spread at the PLA/PA11

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Iz, Muhammet, Jinhyok Lee, Myungchan Choi, Yumi Yun, and Jongwoo Bae. "The Effect of Polyamide 11 on the Thermal Stability and Light Transmittance of Silicone-Based Thermoplastic Vulcanizates." Polymers 16, no. 3 (2024): 324. http://dx.doi.org/10.3390/polym16030324.

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The effect of polyamide 11 (PA11) on the thermal stability and light transmittance properties of silicone-based thermoplastic vulcanizates (TPVs) has been investigated. The blends were prepared through a dynamic vulcanization process by adding 15, 30, and 45 wt% PA11 to the silicon-based TPVs, respectively. The effect of PA11 on the dispersion of silicone rubber in the TPVs after dynamic vulcanization was characterized by a scanning electron microscope (SEM), the thermal stability of the compounds was evaluated through the changes in mechanical performance in the thermo-oxidative aging process

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18

Panaitescu, Denis Mihaela, Raluca Augusta Gabor, Adriana Nicoleta Frone, and Eugeniu Vasile. "Influence of Thermal Treatment on Mechanical and Morphological Characteristics of Polyamide 11/Cellulose Nanofiber Nanocomposites." Journal of Nanomaterials 2015 (2015): 1–11. http://dx.doi.org/10.1155/2015/136204.

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Nanocomposite films were prepared from polyamide 11 (PA11) and cellulose nanofibers (CN) by melt compounding and compression molding. The impact of thermal treatment on the morphology and mechanical behavior of PA11 and nanocomposite films was studied using dynamic mechanical analysis, tensile tests, X-ray diffraction (XRD), and peak force (PF) QNM technique. Slightly higher storage modulus values were obtained for nanocomposites compared to the matrix before the treatment, but a noticeable increase was observed after the treatment. Although CN addition determined increased tensile strength an

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Dechet, Maximilian A., Anja Goblirsch, Stefan Romeis, et al. "Production of polyamide 11 microparticles for Additive Manufacturing by liquid-liquid phase separation and precipitation." Chemical Engineering Science 197 (April 1, 2019): 11–25. https://doi.org/10.1016/j.ces.2018.11.051.

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Within this contribution liquid-liquid phase separation (LLPS) and precipitation from ethanol was studied as an approach to produce polyamide 11 (PA11) powders for selective laser sintering (SLS). To this end, the cloud point and solution temperature curve of the PA11-ethanol system was determined experimentally via turbidity measurements. The proper range of system composition and temperature for particle formation was deduced. The dependence of particle characteristics on process parameters (polymer concentration, stirring conditions and temperature regime) during LLPS and precipitation was

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Jeziorska, Regina, Agnieszka Szadkowska, and Maciej Studzinski. "Morphology and Properties of Poly(2,6-dimethyl-1,4-phenylene oxide)/Polyamide 11 Hybrid Nanocomposites: Effect of Silica Surface Modification." Materials 15, no. 10 (2022): 3421. http://dx.doi.org/10.3390/ma15103421.

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Poly(2,6-dimethyl-1,4-phenylene oxide)/polyamide 11 (PPO/PA11 80/20) blend filled with neat (SiO2) or modified silica having amine functional groups (A-SiO2) was melt mixing in a twin-screw extruder. The silica was prepared by the sol–gel process. SEM shows that, with increasing A-SiO2 content from 1 to 5 wt.%, the morphology of PPO/PA11blend changed from droplet matrix to co-continuous with phase inversion. The phase inversion was also observed for 5 wt.% of neat silica, but the droplet-matrix structure was retained. The overall rheological and mechanical properties improvement of the A-SiO2-

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Peng, Cun, Hua Yang, and Wufei Tang. "Study on the Flammability, Crystal Behaviors and Mechanical Performance of Polyamide 11 Composites by Intercalated Layered Double Hydroxides." International Journal of Molecular Sciences 23, no. 21 (2022): 12818. http://dx.doi.org/10.3390/ijms232112818.

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Sulfamic acid-intercalated MgAl-LDH (SA-LDH) was prepared by an anion exchange method, and its structure was characterized by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). SA-LDH was introduced into polyamide 11 (PA11) by melt blending and to enhance the flame retardancy and mechanical properties. The scanning electron microscope (SEM) and XRD data showed that the lamellar structure of SA-LDH was partly disrupted. The cone calorimeter (CCT) results demonstrated that SA-LDH could effectively decrease the value of heat release rate, which may be ascribed to the bett

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Lebaupin, Yann, Michaël Chauvin, Thuy-Quynh Truong Hoang, Fabienne Touchard, and Alexandre Beigbeder. "Influence of constituents and process parameters on mechanical properties of flax fibre-reinforced polyamide 11 composite." Journal of Thermoplastic Composite Materials 30, no. 11 (2016): 1503–21. http://dx.doi.org/10.1177/0892705716644669.

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Flax unidirectional (UD) fabrics and polyamide 11 (PA11) are used to create a 100% bio-sourced composite. The fabrication process is hot press moulding. Different configurations are studied by varying process parameters and composite constituents. Three temperature values (190°C, 200°C and 210°C) are combined with three pressure levels (35, 65 and 100 bars). In addition, two types of flax fabric (A and B) are tested and two types of PA11 (in the form of powder or film) are used. The two forms of PA11 are characterized using differential scanning calorimetry and rheological methods. Ten differe

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Zhu, Feichao, Juanjuan Su, Mingjun Wang, Munir Hussain, Bin Yu, and Jian Han. "Study on dual-monomer melt-grafted poly(lactic acid) compatibilized poly(lactic acid)/polyamide 11 blends and toughened melt-blown nonwovens." Journal of Industrial Textiles 49, no. 6 (2018): 748–72. http://dx.doi.org/10.1177/1528083718795913.

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With increasing demands on the high-performance and environmental-friendly melt-blown nonwovens (MBs) for separation and filtration, herein, we reported a poly(lactic acid)/polyamide 11 (PLA/PA11) 100% bio-based MBs in situ compatibilized by dual-monomer glycidyl methacrylate–styrene melt-grafted poly(lactic acid) (PLA-g-(St-co-GMA)). The morphology, crystallization, thermal and rheological behaviors of reactive extruded PLA/PA11/PLA-g-(St-co-GMA) melt blends were investigated, and the structure and filtration performance of corresponding MBs were fully characterized. The results indicated tha

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Dintcheva, N. Tz, G. Filippone, R. Arrigo, and F. P. La Mantia. "Low-Density Polyethylene/Polyamide/Clay Blend Nanocomposites: Effect of Morphology of Clay on Their Photooxidation Resistance." Journal of Nanomaterials 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/3549475.

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The photooxidation behaviour of low-density polyethylene (LDPE)/polyamide (PA) blends, containing polyamide 11 (PA11) or polyamide 6 (PA6), has been investigated in the absence and presence of a small amount of commercial organomodified clay (OMMT). The polymer blends LDPE/PA11 and LDPE/PA6 at 75/25 wt./wt.%, with and without OMMT, have been prepared by a two-step procedure: extrusion and sheet formulation. The formulated complex systems have been subjected to accurate morphological analysis in order to evaluate the effect of the OMMT presence on the refinement of the blend morphology. Further

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Li, Rui, Bin Xue, and Jianzhong Pei. "Enhancement of the dielectric performance of PA11/PVDF blends by a solution method with dimethyl sulfoxide." e-Polymers 15, no. 6 (2015): 439–45. http://dx.doi.org/10.1515/epoly-2015-0131.

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AbstractIn this study, the solution method was used to prepare polyamide 11/polyvinylidene difluoride (PA11/PVDF) blend films. The crystal phase compositions and microstructures of the blends were studied by Fourier transform infrared spectroscopy, X-ray diffraction and scanning electron microscopy analysis. Additionally, the dielectric properties of the PA11/PVDF blends, with different ratios and concentrations, were tested. The results indicated that the solution method is more propitious in forming β crystals during the preparation of the PA11/PVDF blend films compared with the melt blendin

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Huynh, Mai Duc. "PREPARATION OF POLYAMIDE11/BAMBOO FLOUR POLYMER COMPOSITE USING POLYVINYL ALCOHOL AS COMPATIBILIZER." Vietnam Journal of Science and Technology 56, no. 2A (2018): 209–16. http://dx.doi.org/10.15625/2525-2518/56/2a/12688.

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In this work, the effects of bamboo flour (BF) and polyvinyl alcohol (PVA) contents on the tensile strength, impact strength, thermogravimetric analysis (TGA) and dynamic mechanical thermal analysis (DMTA) of polyamide 11/BF composites were studied in detail. The PVA was added into PA11/BF composites by two methods: (i) melt mixing with the other components in Haake mixer (one-step method); (ii) dispersing on the surface of BF in ethanol solution before mixing with PA11 in the melted state (two-step method). The investigation of mechanical properties showed the tensile strength of composites p

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Puglisi, Roberta, Andrea Antonino Scamporrino, Nadka Tzankova Dintcheva, et al. "Photo- and Water-Degradation Phenomena of ZnO Bio-Blend Based on Poly(lactic acid) and Polyamide 11." Polymers 15, no. 6 (2023): 1434. http://dx.doi.org/10.3390/polym15061434.

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The goal of this work was to investigate the morphological and chemical–physical changes induced by adding ZnO nanoparticles to bio-based polymeric materials based on polylactic acid (PLA) and polyamide 11 (PA11). Precisely, the photo- and water-degradation phenomena of nanocomposite materials were monitored. For this purpose, the formulation and characterization of novel bio-nanocomposite blends based on PLA and PA11 at a ratio of 70/30 wt.% filled with zinc oxide (ZnO) nanostructures at different percentages were performed. The effect of ZnO nanoparticles (≤2 wt.%) within the blends was thor

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Mandlekar, Neeraj, Aurélie Cayla, François Rault, Stéphane Giraud, Fabien Salaün, and Jinping Guan. "Valorization of Industrial Lignin as Biobased Carbon Source in Fire Retardant System for Polyamide 11 Blends." Polymers 11, no. 1 (2019): 180. http://dx.doi.org/10.3390/polym11010180.

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In this study, two different types of industrial lignin (i.e., lignosulphonate lignin (LL) and kraft lignin (DL)) were exploited as charring agents with phosphorus-based flame retardants for polyamide 11 (PA11). The effect of lignins on the thermal stability and fire behavior of PA11 combined with phosphinate additives (namely, aluminum phosphinate (AlP) and zinc phosphinate (ZnP)) has been studied by thermogravimetric analysis (TGA), UL 94 vertical flame spread, and cone calorimetry tests. Various blends of flame retarded PA11 were prepared by melt process using a twin-screw extruder. Thermog

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Jaouadi, Nour, Mohamed Jaziri, Abderrahim Maazouz, and Khalid Lamnawar. "Biosourced Multiphase Systems Based on Poly(Lactic Acid) and Polyamide 11 from Blends to Multi-Micro/Nanolayer Polymers Fabricated with Forced-Assembly Multilayer Coextrusion." International Journal of Molecular Sciences 24, no. 23 (2023): 16737. http://dx.doi.org/10.3390/ijms242316737.

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The objective of the present study was to investigate multiphase systems based on polylactic acid (PLA) and polyamide 11 (PA11) from blends to multilayers. Firstly, PLA/PA11 blends compatibilized with a multifunctionalized epoxide, Joncryl, were obtained through reactive extrusion, and the thermal, morphological, rheological, and mechanical behaviors of these materials were investigated. The role of Joncryl as a compatibilizer for the PLA/PA11 system was demonstrated by the significant decrease in particle size and interfacial tension as well as by the tensile properties exhibiting a ductile b

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Pébère, Clément, Gautier Mangeret, Eric Dantras, et al. "Mechanical Properties of Surface-Treated Bamboo Strip-Reinforced Biobased Polyamide Composites." Polymers 17, no. 10 (2025): 1379. https://doi.org/10.3390/polym17101379.

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Fully bio-based composites were obtained from continuous bamboo strips and flame-retardant polyamide 11 (PA11-FR) matrix. A mercerization treatment was performed on the bamboo strips surface to optimize fiber-matrix interactions. Composites were obtained by thermocompression molding with two pressure plateaus. The influence of the concentration of NaOH solution treatment was analyzed. The thermogravimetric analysis highlighted that the mercerization treatment removes part of hemicellulose, low molecular weight lignin and amorphous cellulose, while crystalline cellulose is preserved. Dynamic me

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Dobrosielska, Marta, Renata Dobrucka, Paulina Kozera, et al. "Biocomposites Based on Polyamide 11/Diatoms with Different Sized Frustules." Polymers 14, no. 15 (2022): 3153. http://dx.doi.org/10.3390/polym14153153.

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Amorphous diatomite containing approx. 80% silicon dioxide SiO2 was used as a filler for a thermoplastic polymer of polyamide 11 obtained from natural sources. The diatomite particles of different sizes were previously fractionated by sedimentation to obtain powders with varying particle size distribution, including powders with or without frustule particles, crushed, uncrushed or agglomerated. Biocomposites containing 2.5, 5, 10 and 20% filler were tested for their mechanical properties, including tensile strength, flexural strength and impact strength. In addition, a particle size analysis (

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Dobrosielska, Marta, Renata Dobrucka, Dariusz Brząkalski, et al. "Polyamide 11 Composites Reinforced with Diatomite Biofiller—Mechanical, Rheological and Crystallization Properties." Polymers 15, no. 6 (2023): 1563. http://dx.doi.org/10.3390/polym15061563.

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Amorphic diatomaceous earth is derived from natural sources, and polyamide 11 (PA11) is produced from materials of natural origin. Both of these materials show a low harmfulness to the environment and a reduced carbon footprint. This is why the combination of these two constituents is beneficial not only to improve the physicochemical and mechanical properties of polyamide 11 but also to produce a biocomposite. For the purpose of this paper, the test biocomposite was produced by combining polyamide 11, as well as basic and pre-fractionated diatomaceous earth, which had been subjected to silani

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Rasselet, Damien, Anne-Sophie Caro-Bretelle, Aurélie Taguet, and José-Marie Lopez-Cuesta. "Reactive Compatibilization of PLA/PA11 Blends and Their Application in Additive Manufacturing." Materials 12, no. 3 (2019): 485. http://dx.doi.org/10.3390/ma12030485.

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The aim of this work was to study the properties of polylatic acid/polyamide 11 (PLA/PA11) blends compatibilized with a multifunctionalized epoxide, Joncryl®, and to evaluate the performance of such blends processed by Fused Deposition Modeling (FDM) 3D printing, compared to those produced by injection molding method. Blends containing different Joncryl contents from 0.5 to 3 wt% were prepared by twin-screw extrusion. Evaluation of thermal, rheological and mechanical properties of such blends proved that Joncryl acted as a compatibilizer. Results showed that Joncryl effects on blends propertie

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Zheng, Xiaofang, Yongzhong Huang, Shaodi Zheng, Zhengying Liu, and Mingbo Yang. "Improved dielectric properties of polymer-based composites with carboxylic functionalized multiwalled carbon nanotubes." Journal of Thermoplastic Composite Materials 32, no. 4 (2018): 473–86. http://dx.doi.org/10.1177/0892705718762614.

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The biggest issues in the preparation of carbon nanotube (CNT)-reinforced composites reside in efficient dispersion of CNT into polymer matrix. In our work, a simple acid treatment method was adopted to obtain carboxylic functionalized multiwalled nanotubes (MWNTs), thus improving the dispersion of CNT and interaction between particles and polymer matrix. X-ray photoelectron spectroscopy and Fourier transform infrared showed that the carboxylic groups were introduced onto the surface of MWNTs. The Raman spectroscopy showed that the amorphous carbon materials and impurities decreased after acid

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35

Morici, Elisabetta, Giulia Infurna, and Nadka Tz Dintcheva. "Ecofriendly Biopolymer-Based Nanocomposite Films with Improved Photo-Oxidative Resistance." Materials 15, no. 16 (2022): 5778. http://dx.doi.org/10.3390/ma15165778.

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The interest towards high performance biopolymer-based materials increases continuously and, to guarantee appropriately industrial applications, the photo-oxidative resistance and stability of these materials must be adequately addressed. In this study, innovative biopolymer-based nanocomposites, i.e., Polyamide 11 (PA11), containing ad-hoc modified Layered Double Hydroxides (LDH), were successfully formulated and characterized. Particularly, LDH were considered carriers for hindered amine light stabilizing molecules, so two different hindered amine moieties (HALS1 and HALS2) were anchored on

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Sillani, Francesco, Ramis Schiegg, Manfred Schmid, Eric MacDonald, and Konrad Wegener. "Powder Surface Roughness as Proxy for Bed Density in Powder Bed Fusion of Polymers." Polymers 14, no. 1 (2021): 81. http://dx.doi.org/10.3390/polym14010081.

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Powder bed fusion of polymers is becoming increasingly adopted by a variety of industries to tailor the strength, weight and functionality of end-use products. To meet the high standards of the modern manufacturing industry, parts built with powder bed fusion require consistent properties and to be free of defects, which is intrinsically connected to the quality of the powder bed prior to melting. The hypothesis of this work is that the roughness of the top surface of an unmelted powder bed can serve as a proxy for the powder bed density, which is known to correlate with final part density. In

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Fernández-Álvarez, Maria, Francisco Velasco, Asuncion Bautista, Flavia Cristina M. Lobo, Emanuel M. Fernandes, and Rui L. Reis. "Manufacturing and Characterization of Coatings from Polyamide Powders Functionalized with Nanosilica." Polymers 12, no. 10 (2020): 2298. http://dx.doi.org/10.3390/polym12102298.

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Polyamide coatings are thermoplastics with great advantages such as a good corrosion protection of the base metal and wear resistance. Their application as powder coatings is an environmentally friendly option that is currently attracting growing interest. However, during their life service, they can sometimes be exposed to conditions that they are unable to stand. In this work, a polyamide 11 (PA11) powder was reinforced with different percentages of silica nanoparticles (1–3 wt. %). Powder mixtures were prepared through extrusion followed by compression molding processes to manufacture coati

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Gean, V. Salmoria, M. Gindri Izabelle, and F. M. Martins Waldemar. "Comparing Oxygen Plasma, Hydrogen Peroxide and Flame Treatments of Polyamide Tubes to Hydrophilic Coating Adhesion." International Journal of Engineering Research & Science 6, no. 10 (2020): 13–18. https://doi.org/10.5281/zenodo.4159645.

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<strong>Abstract</strong><strong>—</strong> Hydrophilic-coated catheters reduce the endovascular friction between the device and blood and increase the biocompatibility of catheters. This study investigated three surface treatments to improve catheter surface. Oxygen plasma, hydrogen peroxide, and flame exposure coating equipment were manufactured. Polyamide 11 (PA11) catheter surfaces were treated and the influence of exposure time for each individual technique was studied. Treated samples were characterized by goniometry, scanning electron microscopy, infrared spectroscopy and scratch

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Dong, Chufeng, Yitao Liu, Jiepu Li, et al. "Hydrogen Permeability of Polyamide 6 Used as Liner Material for Type IV On-Board Hydrogen Storage Cylinders." Polymers 15, no. 18 (2023): 3715. http://dx.doi.org/10.3390/polym15183715.

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As a commonly used liner material for fully reinforced, carbon-fiber-composite hydrogen storage cylinders, polyamide 6 (PA6) needs to meet the required hydrogen permeation index during use; otherwise, it may adversely affect the safe use of hydrogen storage cylinders. The hydrogen permeability of PA6 under different temperatures and pressures was tested, and the variations in its hydrogen permeability were investigated. Additionally, the hydrogen permeability of PA6, polyamide 11 (PA11), and high-density polyethylene (HDPE) at a temperature of 288 K and a pressure of 70 MPa was tested, and the

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Ussia, Martina, Giusy Curcuruto, Daniela Zampino, et al. "Role of Organo-Modifier and Metal Impurities of Commercial Nanoclays in the Photo- and Thermo-Oxidation of Polyamide 11 Nanocomposites." Polymers 12, no. 5 (2020): 1034. http://dx.doi.org/10.3390/polym12051034.

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The photo-oxidative degradation processes of bio-based PA11 nanocomposites containing montmorillonite (MMT) and the organo-modified Cloisite®30B were investigated to discriminate the influence of organo-modified components on the polymer durability. Indeed, despite the extensive studies reported, there are still ambiguous points to be clarified from the chemical point of view. To this aim, UV-aged materials were analyzed by Size Exclusion Chromatography (SEC), Inductively Coupled Plasma–Mass Spectrometry (ICP-MS) and Matrix-Assisted Laser Desorption Ionization Time-of-Flight Mass Spectrometry

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Morici, Elisabetta, Giuseppe Pecoraro, Sabrina Carola Carroccio, et al. "Understanding the Effects of Adding Metal Oxides to Polylactic Acid and Polylactic Acid Blends on Mechanical and Rheological Behaviour, Wettability, and Photo-Oxidation Resistance." Polymers 16, no. 7 (2024): 922. http://dx.doi.org/10.3390/polym16070922.

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Biopolymers are of growing interest, but to improve some of their poor properties and performance, the formulation of bio-based blends and/or adding of nanoparticles is required. For this purpose, in this work, two different metal oxides, namely zinc oxide (ZnO) and titanium dioxide (TiO2), at different concentrations (0.5, 1, and 2%wt.) were added in polylactic acid (PLA) and polylactic acid/polyamide 11 (PLA/PA11) blends to establish their effects on solid-state properties, morphology, melt behaviour, and photo-oxidation resistance. It seems that the addition of ZnO in PLA leads to a signifi

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Tonello, Riccardo, Knut Conradsen, David Bue Pedersen, and Jeppe Revall Frisvad. "Surface Roughness and Grain Size Variation When 3D Printing Polyamide 11 Parts Using Selective Laser Sintering." Polymers 15, no. 13 (2023): 2967. https://doi.org/10.3390/polym15132967.

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Selective laser sintering (SLS) is a well-established technology that is used for additive manufacturing. Significant efforts have been made to improve SLS by optimizing the powder deposition, laser beam parameters, and temperature settings. The purpose is to ensure homogeneous sintering and prevent geometric and appearance inaccuracies in the manufactured objects. We evaluated the differences in the surface roughness and grain size of curved objects manufactured by using upcoming SLS technology that features two CO laser sources. Our analysis was carried out on polyamide 11 (PA11), which is a

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Mandlekar, Neeraj, Aurélie Cayla, François Rault, Stéphane Giraud, Fabien Salaün, and Jinping Guan. "Development of Novel Polyamide 11 Multifilaments and Fabric Structures Based on Industrial Lignin and Zinc Phosphinate as Flame Retardants." Molecules 25, no. 21 (2020): 4963. http://dx.doi.org/10.3390/molecules25214963.

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Biobased lignin represents one of the possible materials for next-generation flame retardant additives due to its sustainability, environmental benefits and comparable efficiency to other flame retardant (FR) additives. In this context, this study presents the development of FR polyamide 11 (PA11) multifilament yarns and fabric structures containing different industrial lignins (i.e., lignosulfonate lignin (LL), and Kraft lignin (KL)) and zinc phosphinate (ZnP). The combination of ZnP and lignin (KL or LL) at different weight ratios were used to prepare flame retarded PA11 blends by melt mixin

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Khan, Z. I., U. Habib, Z. B. Mohamad, and A. M. Raji. "Enhanced mechanical properties of a novel compatibilized recycled polyethylene terephthalate/polyamide 11 (rPET/PA11) blends." Express Polymer Letters 15, no. 12 (2021): 1206–15. http://dx.doi.org/10.3144/expresspolymlett.2021.96.

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Sergi, Claudia, Libera Vitiello, Patrick Dang, Pietro Russo, Jacopo Tirillò, and Fabrizio Sarasini. "Low Molecular Weight Bio-Polyamide 11 Composites Reinforced with Flax and Intraply Flax/Basalt Hybrid Fabrics for Eco-Friendlier Transportation Components." Polymers 14, no. 22 (2022): 5053. http://dx.doi.org/10.3390/polym14225053.

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The transportation sector is striving to meet the more severe European legislation which encourages all industrial fields to embrace more eco-friendly policies by exploiting constituents from renewable resources. In this framework, the present work assessed the potential of a bio-based, low molecular weight PA11 matrix reinforced with flax and intraply flax/basalt hybrid fabrics. To this aim, both quasi-static and impact performance were addressed through three-point bending and low-velocity impact tests, respectively. For hybrid composites, the effect of stacking sequence, i.e., [0/0] and [0/

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46

Russo, Pietro, Giorgio Simeoli, Libera Vitiello, and Giovanni Filippone. "Bio-Polyamide 11 Hybrid Composites Reinforced with Basalt/Flax Interwoven Fibers: A Tough Green Composite for Semi-Structural Applications." Fibers 7, no. 5 (2019): 41. http://dx.doi.org/10.3390/fib7050041.

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Intraply hybrid green composites were prepared by film stacking and hot-pressing of bio-based polyamide 11 (PA11) sheets and commercial hybrid fabrics made by interweaving flax and basalt fibers (2/2 twill structure). Two matrices were considered, one of them containing a plasticizing agent. After preliminary thermal and rheological characterizations of the neat matrices, the laminates were studied in terms of flexural properties at low and high deformation rates, and the results were interpreted in the light of morphological analyses (scanning electron and optical microscopy). Despite the poo

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Wu, Hao, Rogelio Ortiz, and Joseph H. Koo. "Rubber toughened flame retardant (FR) polyamide 11 nanocomposites Part 1: the effect of SEBS-g-MA elastomer and nanoclay." Flame Retardancy and Thermal Stability of Materials 1, no. 1 (2018): 25–38. http://dx.doi.org/10.1515/flret-2018-0003.

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Abstract The objective of this research is to develop a multifunctional polyamide 11 (PA11) with balanced thermal, mechanical, and flammability properties for SLS. In this study, two sets of formulations were prepared by twin-screw extrusion: the first set examined the effect of maleic anhydride modified elastomers on flammability and the mechanical properties, whereas the second set added various amount of nanoclay and discussed thermal stability, flammability and mechanical properties. The addition of 20 wt.% elastomer brought the elongation at break up to 40%. Reduction in heat release capa

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Baron, Marc, Mamy-Daniel Rakotorinina, Mohamed Ihab El Assil, et al. "Melt radical grafting of diethylmaleate and maleic anhydride onto oligoamide-11 (OA11) and polyamide-11 (PA11) in presence of acyloxyimide derivatives: Toward the compatibilization of PA11/EVOH blends." Materials Today Communications 19 (June 2019): 271–76. http://dx.doi.org/10.1016/j.mtcomm.2019.02.003.

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Yu, Muhuo, Liangliang Qi, Lele Cheng, et al. "The Effect of Cooling Rates on Thermal, Crystallization, Mechanical and Barrier Properties of Rotational Molding Polyamide 11 as the Liner Material for High-Capacity High-Pressure Vessels." Molecules 28, no. 6 (2023): 2425. http://dx.doi.org/10.3390/molecules28062425.

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The rapid development of hydrogen fuel cells has been paralleled by increased demand for lightweight type IV hydrogen storage vessels with high hydrogen storage density, which raises the performance requirements of internal plastic liners. An appropriate manufacturing process is important to improve the quality of polymer liners. In this paper, DSC, WAXD, a universal testing machine and a differential pressure gas permeameter were used to investigate the effect of the cooling rate of the rotational molding polyamide 11 on the thermal, crystallization, mechanical and barrier properties. The coo

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Sharma, Mohit, Sheng Qin Wang, and Yew Wei Leong. "Wear Resistance Properties of Nylon-SiC Hybrids Composites." Advanced Materials Research 1110 (June 2015): 88–91. http://dx.doi.org/10.4028/www.scientific.net/amr.1110.88.

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For marine and offshore applications, the materials specific strength is vital parameter in improvisation of flexible riser parts for deep sea exploration. Nylon is prospective materials for riser application due to its good degree of flexibility and excellent barrier properties, but with the disadvantage of limited working temperature and low wear resistance. The incorporation of fibrous and/or particulate reinforcement is significant to investigate polymers utility for extreme environment condition, such as; elevated temperature and high applied load. Previously it has been reported on the u

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