Article
Materials Science, Composites
Roberto Carlos Vazquez Fletes, Alexandre Raymond, Denis Rodrigue
Summary: By using simple processing methods and different surface treatments, the mechanical properties and homogeneity of wood-plastic composites can be improved, especially when using Maleated Polyethylene (MAPE) treatment. Utilizing a high content of maple fibers can lead to significant improvements in the properties of the composites.
POLYMER COMPOSITES
(2021)
Article
Materials Science, Composites
Zheng Sun, Ze-Kun Zhao, Yuan-Yuan Zhang, Yuan-Qing Li, Ya-Qin Fu, Bao-Gang Sun, Han-Qiao Shi, Pei Huang, Ning Hu, Shao-Yun Fu
Summary: In this study, polyetherimide composites modified by short carbon fibers and expanded graphite were fabricated and their mechanical, tribological, and thermal properties were investigated. The results showed that the addition of SCF-EG hybrid increased the tensile and flexural strength, fracture toughness, and tribological performance of the composites, demonstrating synergistic effects between SCF and EG.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Mechanics
Jonas Nieschlag, Philipp Eisenhardt, Sven Coutandin, Juergen Fleischer
Summary: The study focuses on numerical analysis of rotational molded composite tie rods with optimized geometry to achieve higher mechanical tensile loads.
COMPOSITE STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Linnea Bjorn, Renan Melhado Mazza, Eskil Andreasson, Fredrik Linell, Viviane Lutz-Bueno, Manuel Guizar-Sicairos, Elin Persson Jutemar, Marianne Liebi
Summary: Injection molding leads to layered anisotropic morphology across sample thickness due to varying shear and cooling rates. This study used scanning small-angle X-ray scattering to observe and quantify the hierarchical structure distribution in injection-molded low-density polyethylene (LDPE) parts with different viscosities. The combination of scattering data, injection molding simulations, and tensile testing revealed that oriented shish-kebab structures and elongated spherulite structures consisting of semicrystalline ellipsoids contribute to high ultimate tensile strength in the flow direction. Moreover, a higher degree of orientation is found near the injection gate and in LDPE with higher viscosity, caused by elevated shear and cooling rates during the injection molding process.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Materials Science, Paper & Wood
Wei Li, Wenqing Du, Wenbin Li, Dongzhi Chen, Yang Liu, Yiwei Ouyang
Summary: The hygrothermal aging behavior, finite element analysis, and mechanical properties of RF/PETG composites modified with a silane coupling agent and CNTs were investigated. The water uptakes of the composites with different modifications after 90-days aging were low. Surface modifications of the ramie fibers did not significantly influence the water uptakes, but were related to the hydrophilicity difference of the composites. The bending strengths of the modified composites increased compared to the untreated composites, and the bending properties changed after aging.
Article
Materials Science, Characterization & Testing
Agbelenko Koffi, Demagna Koffi, Lotfi Toubal
Summary: The study found that birch-fiber-reinforced HDPE in the injection molding process maintained constant energy absorption for drop weight impact, while impact strength was inversely proportional to fiber content. The composite material with 40% fiber showed a slight decrease in toughness but significant improvements in hardness and tensile strength.
Article
Polymer Science
K. Prasad, M. Nikzad, I Sbarski
Summary: This study compares and contrasts the mechanical properties, transport characteristics, and adsorption of uncompatibilized LLDPE composites with softwood and hardwood flour dispersed phases in rotational molding. The results show that the addition of wood flour reduces most mechanical properties, but the properties remain consistent pre and post ethanol sorption when the dispersed phase weight fraction is around 5%. It is suggested that with proper support structures, these composites have potential for use as storage units for liquid materials.
JOURNAL OF POLYMER RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Yixing Chen, Chuanjun Tu, Yanli Liu, Ping Liu, Pei Gong, Guangning Wu, Xia Huang, Jian Chen, Tianhua Liu, Jizhou Jiang
Summary: The study presents a synthetic method for carbon nanofibers reinforced carbon graphite composites through liquid-phase mixing. The utilization of carbon nanofibers improves the microstructures and mechanical properties of the composites. The addition of a small amount of carbon nanofibers enhances the densification and mechanical strength of the composites.
Article
Engineering, Chemical
Yueqing Ren, Xiaojie Sun, Yafei Li, Lanlan Chen, Miaomiao Sun, Wenbin Liang
Summary: The research demonstrates that crosslinked high-density polyethylene (XL-HDPE) has good impact strength and environmental stress crack resistance. The microstructures of the innermost surface layer after rotational molding play a dominant role in low temperature impact performance and are closely related to the brittle-ductile transition of the material.
POLYMER ENGINEERING AND SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Jian Zhao, Chengjie Guo, Xiubin Zuo, Allen Jonathan Roman, Yinghao Nie, Dong-Xiao Su, Lih-Sheng Turng, Tim A. Osswald, Gengdong Cheng, Weidong Chen
Summary: This paper presents a methodology for calculating the elasto-plastic behaviors of injection-molded short fiber composites. The fiber orientation distribution is obtained using micro-computed tomography, and numerical modeling and finite element homogenization are employed to analyze the mechanical properties. Experimental results show that the proposed method accurately predicts the effective mechanical behaviors of the composites.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
Article
Materials Science, Ceramics
Hongming Wei, Jianpeng Zou, Yurong Gong, Xiaoya Li, Wenyi Zhan, Feiyang Li
Summary: Copper/graphite/Ti2SnC composites with good mechanical properties, wear resistance and lubrication performance were fabricated, showing better hardness, impact toughness, wear resistance and lubrication properties than copper/graphite composites.
CERAMICS INTERNATIONAL
(2022)
Article
Polymer Science
Jian Wang, Qianchao Mao, Nannan Jiang, Jinnan Chen
Summary: This study investigates the effects of barrel temperature, injection pressure, injection speed, and holding time on the properties of insert-injection molded polypropylene composites (SPCs). The optimal processing conditions were determined, and the best tensile and peel strengths were obtained.
Article
Materials Science, Multidisciplinary
Laszlo Meszaros, Balazs Tatar, Krisztina Toth, Anna Foldes, Krisztina S. Nagy, Angela Jedlovszky-Hajdu, Tunde Toth, Kolos Molnar
Summary: This study aimed to develop a self-reinforced composite material that can be processed using standard thermoplastic techniques and has potential applications in implants. By cross-linking fibers with gamma irradiation and combining high-density polyethylene with high-performance polyethylene fibers, the mechanical performance of the composite material was improved without compromising biocompatibility. The addition of 20 m% 200 kGy irradiated Dyneema (R) fibers significantly increased the tensile modulus and strength of the composite material, which exhibited good biocompatibility. The manufacturing method presented in this study offers an economical solution that can be implemented using widely available processing technologies and machines.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Yayu Tian, Hongzhu Ma, Baoshan Xing
Summary: Fe3O4/3MEG-I demonstrated rapid adsorption efficiency and tunable adsorption properties through adjusting the amount of MEG. The adsorption process better fitted the Langmuir isotherm and pseudo-second-order kinetic models. It efficiently adsorbed both anionic and cationic dyes under neutral conditions.
APPLIED SURFACE SCIENCE
(2021)
Article
Polymer Science
C. N. Aiza Jaafar, I. Zainol, M. I. Izyan Khairani, T. T. Dele-Afolabi
Summary: The effects of filler loading and silane coupling agent on the properties of hydroxyapatite-filled high density polyethylene composites were investigated. The developed composites exhibited enhanced mechanical performance and low cytotoxicity, suggesting great potential for biomedical applications.
Article
Materials Science, Multidisciplinary
Hermanus Joachim Kruger, Walter Wilhelm Focke, Washington Mhike, Albertus Taute, Albert Roberson
FIRE AND MATERIALS
(2017)
Review
Materials Science, Composites
Washington Mhike, Walter W. Focke, Joseph K. O. Asante
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2018)
Article
Thermodynamics
Washington Mhike, Walter W. Focke, Jodi Mackenzie, Edward J. Mills, Heinrich Badenhorst
THERMOCHIMICA ACTA
(2018)
Article
Polymer Science
Walter Wilhelm Focke, Hermanus Joachim Kruger, Washington Mhike, Albertus Taute, Albert Roberson, Osei Ofosu
JOURNAL OF APPLIED POLYMER SCIENCE
(2014)
Article
Polymer Science
Washington Mhike, Ignatius V. W. Ferreira, Jing Li, Stanislav I. Stoliarov, Walter W. Focke
JOURNAL OF APPLIED POLYMER SCIENCE
(2015)
Article
Engineering, Multidisciplinary
Hermanus Joachim Kruger, Walter Wilhelm Focke, Washington Mhike, Albertus Taute, Albert Roberson, Osei Ofosu
JOURNAL OF FIRE SCIENCES
(2014)
Article
Polymer Science
Walter Wilhelm Focke, Herminio Muiambo, Washington Mhike, Hermanus Joachim Kruger, Osei Ofosu
POLYMER DEGRADATION AND STABILITY
(2014)
Article
Thermodynamics
W. Mhike, W. W. Focke, J. P. Mofokeng, A. S. Luyt
THERMOCHIMICA ACTA
(2012)
Article
Thermodynamics
Walter Wilhelm Focke, Heinrich Badenhorst, Washington Mhike, Hermanus Joachim Kruger, Dewan Lombaard
THERMOCHIMICA ACTA
(2014)
Article
Chemistry, Multidisciplinary
Siyabulela J. Tshemese, Washington Mhike, Shepherd M. Tichapondwa
Summary: In this study, Exfoliated Graphite (EG) was investigated as an adsorbent for the removal of Cr (VI) and phenol from industrial effluents. The removal efficiency was found to be highest for Cr (VI) under acidic conditions (pH 2) and for phenol under basic conditions (pH 12). Three non-linear adsorption models were evaluated, with Redlich-Peterson and Langmuir isotherms found to describe the equilibrium data for Cr (VI) and phenol, respectively. The study also concluded that the adsorption of phenol and Cr (VI) onto EG was a feasible, endothermic and spontaneous process.
ARABIAN JOURNAL OF CHEMISTRY
(2021)
