Article
Chemistry, Physical
Mohammad E. Golmakani, Tomasz Wiczenbach, Mohammad Malikan, Reza Aliakbari, Victor A. Eremeyev
Summary: The present research investigated the mechanical properties of wood flour reinforced polyethylene polymer composites with varying wood flour size, aspect ratios, and mold injection temperature. Results showed that reducing the wood flour size decreased the tensile strength and modulus, flexural strength and impact energy, while increasing the flexural modulus. Additionally, increasing the injection molding temperature decreased the tensile strength and modulus, impact energy, while increasing the flexural strength and modulus. Thus, optimizing the injection molding temperature can improve the mechanical properties of the composite.
Article
Materials Science, Multidisciplinary
Tong Wei, Xin Yang, Yuna Huo, Xue Jia, Weidong Shan, Weihong Wang
Summary: In this study, a flame retardant system was developed for wood plastic composite (WPC) by combining ammonium polyphosphate (APP) with lignin (L). The optimal ratio of L/APP was determined and the distribution of the flame retardant system in the WPC was analyzed. The concentrated distribution of the flame retardant system in the surface layer of the WPC showed improved flame retardant performance and maintained better mechanical properties.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Polymer Science
Carla I. Martins, Vitoria Gil, Sara Rocha
Summary: This research investigates the influence of pine wood sawdust granulometry on the processing of MDPE/wood composites by rotational molding. The results show that granulometry below 500 μm leads to improved sintering and homogeneity, while 300-500 μm particles enhance impact resistance. Increasing wood content reduces impact properties and results in a highly porous structure. Different aesthetics and functionalities of WPC parts were achieved through rotational molding.
Article
Polymer Science
Laleh Ghasemi-Mobarakeh, Santiago Cano, Vahid Momeni, Dongyan Liu, Ivica Duretek, Gisbert Riess, Christian Kukla, Clemens Holzer
Summary: The study evaluated the effect of adding AAHDPE on the interaction between ceramic powder and binder in ceramic injection molding. Results showed that AAHDPE improved powder-binder adhesion, promoted powder dispersion and homogeneous mixing, and reduced the viscosity of the polymer composites and feedstocks.
Article
Polymer Science
Geeta Pokhrel, Douglas J. Gardner, Yousoo Han
Summary: This study investigates the properties of WPCs made from wood flour and wood pellets, showing that composite products from wood pellets have higher density but lower tensile strength, tensile modulus, and impact strength compared to those made from wood flour. Flexural properties of composites made with pellets were higher without MAPP, but lower with it. Overall, the mechanical property differences between the two were low (0.5-10%) depending on the specific WPC formulations. Statistical analysis indicated no significant differences in material properties between composites made from wood flour and wood pellets, with some situations showing better WPC properties using wood pellets.
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
Polymer Science
Zoya Ghanem, Hana Jelinek Sourkova, Jan Sezemsky, Petr Spatenka
Summary: This study investigated the effect of plasma treatment on the adhesion between polyethylene and glass fibers in composites prepared by rotational molding. The results showed that treating both the powder and fibers improved the adhesion and mechanical properties of the resulting composites compared to pure polyethylene samples.
Article
Polymer Science
Kishor Biswas, Vinay Khandelwal, Sourindra Nath Maiti
Summary: Teak wood flour reinforced high density polyethylene and maize starch composites were prepared with maleic anhydride grafted polyethylene as a compatibilizer. Mechanical properties of the composites improved with the addition of teak wood flour, while the damping factor peak and storage modulus were higher than HDPE, showing potential for interior, automobile, and packaging applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Shengbo Ge, Shida Zuo, Minglong Zhang, Yonghong Luo, Rui Yang, Yingji Wu, Ye Zhang, Jianzhang Li, Changlei Xia
Summary: The study found that decayed wood plastic composites with chitosan exhibited better properties than decayed wood plastic composites without any additive, and even better than sound wood plastic composites. Adding chitosan to decayed wood powder and PVC improved the performance of the DWPC, reaching the level of sound wood plastic composites. This work proposed a novel green strategy for utilizing decayed wood for making polyvinyl chloride/wood flour composites.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
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
Engineering, Environmental
Yung-Chuan Chiou, Ming-Yuan Shen, Chin-Lung Chiang, Yi-Luen Li, Wei-Min Lai
Summary: This study utilized maleic anhydride grafted polyolefin elastomers and methyl methacrylate-butadiene-styrene copolymer as impact modifiers to prepare wood-plastic composites (WPCs) from recycled materials. The research investigated the thermal and mechanical properties of WPCs with different polymer blend ratios, revealing that the toughening effect of POE-g-ma/WPC was slightly better than MBS/WPC.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Materials Science, Composites
Zhiping Wang, Chen Wang, Ye Qin, Anmin Huang, Ru Liu
Summary: This paper investigated the effect of OMMT modification on wood flour/poly (lactic acid) composites, revealing that nearly all mechanical properties showed improvements after modification, except for impact strength. Composite made of pure PLA and OMMT-modified WF exhibited the best mechanical properties, while composite made of pure WF and OMMT-modified PLA showed the worst performance.
POLYMER COMPOSITES
(2021)
Article
Materials Science, Composites
Chenglin Li, Qingyuan Du, Yue Ru, Hao Zhang, Yi An, Jiaming Liu, Daming Wu, Dali Gao, Jingyao Sun
Summary: With the increasing power consumption of electronic devices, the challenge of heat dissipation has become a major issue. This study focuses on the preparation of polypropylene/carbon fiber/Al2O3, polypropylene/carbon fiber, and polypropylene/carbon fiber/SiO2 composites with excellent properties using injection molding and injection compression methods. The results show that the composites prepared by injection compression have better thermal conductivity and mechanical properties compared to those prepared by injection molding.
COMPOSITES COMMUNICATIONS
(2022)
Article
Polymer Science
Lun Howe Mark, Chongxiang Zhao, Raymond K. M. Chu, Chul B. Park
Summary: This study focuses on the creation and application of PET nanofibrils for PP composite reinforcement. By using a spunbond process, PET nanofibrils are fibrillated within a PP matrix, leading to improved tensile and flexural performance in injection molded parts. The nanofibrils also enhance the microcellular morphology in foam injection molding, resulting in further improved performance.
Article
Polymer Science
Anna K. Zykova, Petr V. Pantyukhov, Elena E. Mastalygina, Christian Chaverri-Ramos, Svetlana G. Nikolaeva, Jose J. Saavedra-Arias, Anatoly A. Popov, Sam E. Wortman, Matheus Poletto
Summary: Biocomposite films based on polyethylene and lignocellulosic fillers show potential for biodegradation, with higher rates in warmer climates.
