Polymer Testing最新文献_第2页

Study on the reinforcement mechanism of LCD photopolymerization 3D-printed triply periodic minimal surface structures doped with carbon fiber and hydroxyapatite 碳纤维和羟基磷灰石掺杂LCD光聚合3d打印三周期最小表面结构的增强机理研究

IF 6 2区材料科学

Polymer Testing Pub Date : 2026-03-01 Epub Date: 2026-02-27 DOI: 10.1016/j.polymertesting.2026.109134

Tianyu Gao , Hui Yan , Kehai Long , Wenjun Xu , Hao Wang , Xinyuan Long , Yifan Li , Zheng Qin

{"title":"Study on the reinforcement mechanism of LCD photopolymerization 3D-printed triply periodic minimal surface structures doped with carbon fiber and hydroxyapatite","authors":"Tianyu Gao , Hui Yan , Kehai Long , Wenjun Xu , Hao Wang , Xinyuan Long , Yifan Li , Zheng Qin","doi":"10.1016/j.polymertesting.2026.109134","DOIUrl":"10.1016/j.polymertesting.2026.109134","url":null,"abstract":"<div><div>This study quantifies how architecture and fillers govern the compressive and energy-absorption behavior of LCD-photopolymerized P-type TPMS lattices. Specimens with unit-cell sizes of 10–20 mm and volume fractions of 10–30% were LCD-printed. Carbon fibers and nano-hydroxyapatite were added as fillers. Mechanical response was evaluated by compression testing and supported by numerical simulations. Unfilled lattices showed overall geometric integrity with localized microporosity and a three-stage stress–strain response dominated by plastic dissipation. Increasing volume fraction raised compressive modulus, yield/ultimate strengths, and energy absorption; the l = 16.7 mm, 30% configuration provided the best overall performance. Under cyclic loading, higher volume fraction increased hysteretic energy at identical maximum strain, while 30% volume-fraction specimens exhibited reduced residual strain at higher maximum strains. Fillers yielded distinct reinforcement profiles. At equal contents, 50-mesh carbon fibers most effectively enhanced energy absorption via plateau extension; 500-mesh fibers primarily delivered modest strength gains; HAP (Hydroxyapatite)increased compressive modulus and ultimate strength with content but decreased yield strength, indicating toughness loss due to particle effects. Simulations reproduced the experimental trends and key stress-localization features. These findings provide design guidance for selecting unit-cell size, volume fraction, and filler systems to enhance strength and energy absorption of LCD-printed TPMS-P lattices within manufacturability constraints.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"156 ","pages":"Article 109134"},"PeriodicalIF":6.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147404672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimation of the surface tension and dispersive and polar components of polymers as a function of temperature for composite manufacturing applications 估计表面张力和聚合物的分散和极性组分作为复合材料制造应用的温度函数

IF 6 2区材料科学

Polymer Testing Pub Date : 2026-03-01 Epub Date: 2026-02-09 DOI: 10.1016/j.polymertesting.2026.109112

Rami Alawar , Pierre-Jacques Liotier , Romain Ravel , Monica Francesca Pucci

{"title":"Estimation of the surface tension and dispersive and polar components of polymers as a function of temperature for composite manufacturing applications","authors":"Rami Alawar , Pierre-Jacques Liotier , Romain Ravel , Monica Francesca Pucci","doi":"10.1016/j.polymertesting.2026.109112","DOIUrl":"10.1016/j.polymertesting.2026.109112","url":null,"abstract":"<div><div>Understanding adhesion between fiber and matrix at elevated temperatures is essential for improving the mechanical performance of polymer-based composites, especially with thermoplastic matrices. However, detailed characterization of polymer surface tension and its polar and dispersive components as a function of temperature remains limited. In this work, reliable methods were set using the Wilhelmy plate and pendant drop approaches to investigate these properties against temperature. First, experimental procedures were developed, optimized, and validated through cross-comparison with reference liquids of known surface tension and components. Accurate and reproducible measurements were secondly achieved across a range of elevated temperatures for liquid polymers (polyethylene glycol, bio-based epoxy) and for molten thermoplastics (polypropylene, polylactic acid). The results reveal a linear decrease in surface tension with increasing temperature and contribute to a better understanding of fiber wetting phenomena. Additionally, a procedure was set to determine polymer dispersive and polar components as a function of temperature. Due to the volatility and thermal limitation of n-hexane used in interfacial tension measurements, alternative probe liquids were systematically evaluated. Silicone and paraffin oil were identified and validated as suitable replacements, enabling reliable measurements with polymers at high temperatures. These key findings demonstrate robust methodology for high-temperature surface characterization and provide essential data to understand fiber–matrix adhesion under realistic processing conditions.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"156 ","pages":"Article 109112"},"PeriodicalIF":6.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147404748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tensile properties of electrospun polyacrylonitrile nanofibres: Influence of fibre orientation and stretching 静电纺聚丙烯腈纳米纤维的拉伸性能：纤维取向和拉伸的影响

IF 6 2区材料科学

Polymer Testing Pub Date : 2026-03-01 Epub Date: 2026-02-03 DOI: 10.1016/j.polymertesting.2026.109105

Siheng Shao, Surya D. Pandita, Boru An, Gerard F. Fernando

{"title":"Tensile properties of electrospun polyacrylonitrile nanofibres: Influence of fibre orientation and stretching","authors":"Siheng Shao, Surya D. Pandita, Boru An, Gerard F. Fernando","doi":"10.1016/j.polymertesting.2026.109105","DOIUrl":"10.1016/j.polymertesting.2026.109105","url":null,"abstract":"<div><div>The tensile mechanical properties of electrospun polyacrylonitrile (PAN) nanofibres are generally lower when compared to melt and solution-spun fibres. Whilst electrospinning has been reported extensively, the effect of stretching of aligned nanofibres has not received significant coverage. In the current study, aligned electrospun PAN nanofibres were produced using the Vee-shield technique. The polymer concentration was 12 wt/vol% in dimethyl sulfoxide (DMSO). The tensile strength and modulus of the aligned PAN nanofibres were 76.31 ± 3.34 MPa and 4.05 ± 1.17 GPa respectively. This represents a threefold increase over the randomly oriented nanofibres (27.8 ± 1.90 MPa, 0.70 ± 0.22 GPa). Post-stretching (13.3% strain, held for 1, 2 and 4 h) of the aligned nanofibres enhanced the tensile strength by 18.27%. The viscoelastic behaviour of the stretched nanofibres was characterised using the generalised Maxwell model and excellent correlation (R<sup>2</sup> = 0.96) was observed between the experimental and predicted datasets. This paper demonstrates that the mechanical properties of electrospun PAN nanofibres can be enhanced through fibre alignment and controlled post-alignment stretching. This technique offers a method for improving the tensile properties of electrospun nanofibres.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"156 ","pages":"Article 109105"},"PeriodicalIF":6.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147404749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental and numerical analysis of woven S-glass fibre/PEKK laminates subjected to low velocity impact at different locations s -玻璃纤维/PEKK编织层合板不同位置低速冲击的实验与数值分析

IF 6 2区材料科学

Polymer Testing Pub Date : 2026-03-01 Epub Date: 2026-02-28 DOI: 10.1016/j.polymertesting.2026.109135

Nassier A. Nassir , Pouria B. Ataabadi , R.S. Birch , W.J. Cantwell , J. Zhou , Z.W. Guan

{"title":"Experimental and numerical analysis of woven S-glass fibre/PEKK laminates subjected to low velocity impact at different locations","authors":"Nassier A. Nassir , Pouria B. Ataabadi , R.S. Birch , W.J. Cantwell , J. Zhou , Z.W. Guan","doi":"10.1016/j.polymertesting.2026.109135","DOIUrl":"10.1016/j.polymertesting.2026.109135","url":null,"abstract":"<div><div>High-performance composites based on Poly-ether-ketone-ketone (PEKK) have exhibited an exceptional impact resistance. However, update there is hardly any work focused on investigating the off-centre impact response of these composites. Therefore, this paper aims to investigate the impact response of the composite plates based on high-performance S2-glass fibre reinforced thermoplastic (GF/PEKK) subjected to impact loading at different kinetic energies and different impact locations. The composite plates were therefore manufactured based on a lay-up consisting of eight plies of fibrous reinforcement and PEKK powder compacted in a hot press. Following manufacture, the plates were subjected to impact, both centrally and at off-centre positions. Herein, the force and energy absorption profiles are presented, along with impact damage profiles. Further, an ABAQUS/Explicit finite element (FE) model was developed as a means of predicting the behaviour of the laminates when subjected to these various impact scenarios. The modelling results were then compared with these experimental findings. It is shown that the FE model can be used to successfully predict failure in these GF/PEKK laminates under conditions of both central and off-centre impact.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"156 ","pages":"Article 109135"},"PeriodicalIF":6.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147404670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Insulating yet terahertz-shielding Epoxy/MXene composites for impact-resistant electronic encapsulation 用于抗冲击电子封装的绝缘太赫兹屏蔽环氧/MXene复合材料

IF 6 2区材料科学

Polymer Testing Pub Date : 2026-03-01 Epub Date: 2026-02-24 DOI: 10.1016/j.polymertesting.2026.109124

Ruizhi Wang , Bowen Zhan , Zhiqiang Wang , Lijun Zhao , Junru Wang , Xiaochu Lin , Hongxiang Cao , Enling Tang

{"title":"Insulating yet terahertz-shielding Epoxy/MXene composites for impact-resistant electronic encapsulation","authors":"Ruizhi Wang , Bowen Zhan , Zhiqiang Wang , Lijun Zhao , Junru Wang , Xiaochu Lin , Hongxiang Cao , Enling Tang","doi":"10.1016/j.polymertesting.2026.109124","DOIUrl":"10.1016/j.polymertesting.2026.109124","url":null,"abstract":"<div><div>The development of electronic encapsulation materials for munitions requires a unique combination of high impact resistance, effective electromagnetic interference (EMI) shielding, and reliable electrical insulation. Traditional epoxy resins often fall short in mitigating extreme mechanical loads and complex electromagnetic threats simultaneously. This study addresses this challenge by fabricating epoxy (Ep) composites incorporated with two-dimensional Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene nanosheets (0.5∼4 wt%) as multifunctional fillers. The Ep/MXene composites were systematically evaluated for their mechanical properties, impact resistance, and electromagnetic shielding effectiveness across GHz and THz bands. Results indicate that an optimal MXene content of 2 wt% yields a superior balance of properties, achieving a maximum yield strength of 62.84 MPa and a ∼40% enhancement in impact energy absorption (25.4 J) compared to pure epoxy. Electromagnetic characterization reveals that while the composites provide moderate shielding in the GHz band (SET up to ∼4 dB at 4 wt%), they exhibit exceptional, absorption-dominated shielding in the THz band, with the 4 wt% composite attenuating over 99% of incident waves. Crucially, all composites retained high electrical insulation, comparable to neat epoxy. The synergistic enhancement is attributed to MXene's role in stress transfer, crack pinning, the formation of local conductive networks, and interfacial polarization effects.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"156 ","pages":"Article 109124"},"PeriodicalIF":6.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147404677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Extrusion processing of PEO/LATP composite electrolytes for solid-state batteries 固态电池用PEO/LATP复合电解质的挤压加工

IF 6 2区材料科学

Polymer Testing Pub Date : 2026-03-01 Epub Date: 2026-02-24 DOI: 10.1016/j.polymertesting.2026.109123

Hippolyte Houisse , Renaud Bouchet , Christian Carrot , Victor Chaudoy

{"title":"Extrusion processing of PEO/LATP composite electrolytes for solid-state batteries","authors":"Hippolyte Houisse , Renaud Bouchet , Christian Carrot , Victor Chaudoy","doi":"10.1016/j.polymertesting.2026.109123","DOIUrl":"10.1016/j.polymertesting.2026.109123","url":null,"abstract":"<div><div>Lithium metal has been seen for long as the key to develop next generation of high energy batteries but suffers from the formation of lithium dendrites during cycling which is hardly hindered by liquid electrolytes. Polymer electrolytes based on poly (ethylene oxide) doped by lithium salts provide good interfaces but suffer from poor ionic conductivity at room temperature and lack of mechanical properties above the melting temperature. Composite electrolytes are considered as a possible way to overcome these issues. This study experimented melt-extrusion without added solvent as a way to elaborate such an electrolyte using a model NaSICON type Li<sub>1.3</sub>Al<sub>0.3</sub>Ti<sub>1.7</sub>(PO<sub>4</sub>)<sub>3</sub> lithium-ion conductive filler, dispersed in a doped polymer matrix. Morphological, physical and resulting electrochemical properties of various compositions were investigated. 55 vol% of filler was shown to be the maximum that can be incorporated due to excessive viscosity and jamming. Below this limit, the extruded electrolytes display homogeneously dispersed particles and reduced tuneable porosity that enable to get soft elastic membranes at room temperature. Limitation of the ionic conductivity was observed and attributed to tortuosity and transport resistance at interfaces.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"156 ","pages":"Article 109123"},"PeriodicalIF":6.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147404750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synergistic effects of resorcinol bis (diphenyl phosphate) (RDP) on the flame retardancy, foaming behavior, and thermal stability of poly (2,6-dimethyl-1,4-phenylene oxide) / polyamide (PPO/PA) composites 间苯二酚双（二苯基磷酸）（RDP）对聚（2,6-二甲基-1,4-环氧苯）/聚酰胺（PPO/PA）复合材料的阻燃性、发泡性能和热稳定性的协同作用

IF 6 2区材料科学

Polymer Testing Pub Date : 2026-03-01 Epub Date: 2026-02-26 DOI: 10.1016/j.polymertesting.2026.109129

Xiangbu Zeng , Shengnan Li , Jinfu Xing , Xiaodie Zhang , Chun Zhang , Wei Gong , Li He , Tuanhui Jiang

{"title":"Synergistic effects of resorcinol bis (diphenyl phosphate) (RDP) on the flame retardancy, foaming behavior, and thermal stability of poly (2,6-dimethyl-1,4-phenylene oxide) / polyamide (PPO/PA) composites","authors":"Xiangbu Zeng , Shengnan Li , Jinfu Xing , Xiaodie Zhang , Chun Zhang , Wei Gong , Li He , Tuanhui Jiang","doi":"10.1016/j.polymertesting.2026.109129","DOIUrl":"10.1016/j.polymertesting.2026.109129","url":null,"abstract":"<div><div>This study explores the modification and foaming behavior of poly (2,6-dimethyl-1,4-phenylene oxide) (PPO) and polyamide 6 (PA6) composites with resorcinol bis (diphenyl phosphate) (RDP) as the flame retardant. The composites were prepared by extrusion blending, followed by chemical foaming injection molding. The effects of RDP content and core-back distance on microstructure, thermal properties, rheological behavior, flame retardancy, and foaming performance were systematically evaluated. RDP improved the flame retardancy by forming a dense protective char layer, but simultaneously reduced the thermal stability and crystallinity due to its plasticizing effect. Notably, incorporation of RDP improved the foaming quality, producing a more uniform cellular structure with smaller cell size. Rheological analysis indicated that an increase in RDP content reduced the melt viscosity and elasticity, thus promoting superior foam formation. The foamed structure could reduce the LOI value slightly, compared to un-foamed samples, but the overall flame retardancy remained high. At 8% RDP loading, the average cell diameter reached 87 μm, and the cell density increased to 5.3 × 10<sup>5</sup> cells/cm<sup>3</sup>. This shows the synergistic effects of RDP on the flame retardancy and foaming performance of the composites. These findings underscore the potential of PPO/PA6 composites for applications demanding lightweight materials with enhanced fire safety.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"156 ","pages":"Article 109129"},"PeriodicalIF":6.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147404611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High wood content / Poly(Butylene succinate) composites 3D-printed by fused granulate fabrication 高木材含量/聚丁二酸丁二烯复合材料熔融颗粒制造3d打印

IF 6 2区材料科学

Polymer Testing Pub Date : 2026-03-01 Epub Date: 2026-02-23 DOI: 10.1016/j.polymertesting.2026.109121

Oskars Platnieks , Alisa Ponkratenkova , Martins Nabels-Sneiders , Davis Veidmanis , Krisjanis Smits , Vijay Kumar Thakur , Sergejs Gaidukovs

{"title":"High wood content / Poly(Butylene succinate) composites 3D-printed by fused granulate fabrication","authors":"Oskars Platnieks , Alisa Ponkratenkova , Martins Nabels-Sneiders , Davis Veidmanis , Krisjanis Smits , Vijay Kumar Thakur , Sergejs Gaidukovs","doi":"10.1016/j.polymertesting.2026.109121","DOIUrl":"10.1016/j.polymertesting.2026.109121","url":null,"abstract":"<div><div>The development of high bio-content materials for additive manufacturing is limited by restricted filler loadings and poor melt processability in filament-based extrusion. This work demonstrates fused granulate fabrication (FGF) of poly(butylene succinate) (PBS) composites incorporating up to 55 wt% industrial birch wood dust without chemical compatibilizers. The influence of filler content on rheology, print quality, thermal behavior, and mechanical performance was systematically evaluated. Increasing wood content resulted in progressively higher melt viscosity and a transition from Newtonian to pronounced shear-thinning flow above 20 wt%, enabling improved dimensional stability during deposition. Optimal surface consolidation and interlayer fusion were achieved at 30–45 wt% filler, defining an effective processing window for highly filled PBS–wood composites. The Young's modulus increased from 0.34 GPa for neat PBS to approximately 1.3 GPa at 25 wt% wood, and then remained at a similar level for higher filler loadings up to 55 wt%. Tensile strength exhibited a non-linear dependence on filler loading, reaching a maximum of 28.9 MPa at 35 wt% wood. Differential scanning calorimetry revealed enhanced crystallinity up to 25 wt% wood, followed by a decline at higher concentrations. Thermogravimetric analysis confirmed that all compositions remained thermally stable within the 200–220 °C processing window used for FGF. The established structure–property and processing relationships confirm that PBS–wood composites can be processed at exceptionally high loadings without compromising printability, representing a significant advance toward high bio-content materials for additive manufacturing.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"156 ","pages":"Article 109121"},"PeriodicalIF":6.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147405105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling the morphology evolution of PET during equi-biaxial elongation: from SAXS measurement to viscoelastic behavior prediction 模拟PET在等双轴延伸期间的形态演变：从SAXS测量到粘弹性行为预测

IF 6 2区材料科学

Polymer Testing Pub Date : 2026-03-01 Epub Date: 2026-02-20 DOI: 10.1016/j.polymertesting.2026.109120

Luc Chevalier, Yun-Mei Luo

引用次数: 0

Investigating the uniaxial compressive mechanics of graded polymer foams via in-situ synchrotron X-ray microtomography 利用原位同步加速器x射线微层析成像技术研究梯度聚合物泡沫的单轴压缩力学

IF 6 2区材料科学

Polymer Testing Pub Date : 2026-03-01 Epub Date: 2026-02-11 DOI: 10.1016/j.polymertesting.2026.109107

Paolo Iaccarino , Clément Rey , Lorenzo Miele , Victor Okumko , Mario Scheel , Timm Weitkamp , Henry Proudhon , Ferdinando Auricchio , Ernesto Di Maio , Andrei Constantinescu

{"title":"Investigating the uniaxial compressive mechanics of graded polymer foams via in-situ synchrotron X-ray microtomography","authors":"Paolo Iaccarino , Clément Rey , Lorenzo Miele , Victor Okumko , Mario Scheel , Timm Weitkamp , Henry Proudhon , Ferdinando Auricchio , Ernesto Di Maio , Andrei Constantinescu","doi":"10.1016/j.polymertesting.2026.109107","DOIUrl":"10.1016/j.polymertesting.2026.109107","url":null,"abstract":"<div><div>Graded polymer foams are emerging as transformative materials for structural applications, outperforming uniform foams due to their spatially tailored density and microstructural features. However, harnessing their full potential requires a deep understanding of how their macroscopic mechanical behavior relates to their complex microstructure evolution. In this study, we elucidate the uniaxial compressive response of graded foams using <em>in-situ</em> synchrotron X-ray microtomography, complemented by comparative experiments on uniform foams of varying densities. Our findings reveal that graded foams exhibit both qualitatively and quantitatively distinct mechanical behavior, driven by unique microscale deformation mechanisms. We evaluate and discuss their superior energy absorption performance and demonstrate how the density, cell size and circularity profile evolves under increasing macroscopic strain. Notably, the graded architecture enables precise control over the localization and progression of densification bands, offering unprecedented design flexibility for advanced structural applications.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"156 ","pages":"Article 109107"},"PeriodicalIF":6.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146154269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0