Journal of Research Updates in Polymer Science最新文献_第3页

Relationship between Thermal Conductivity and Compressive Strength of Insulation Concrete: A Review 保温混凝土导热系数与抗压强度关系的研究进展

Journal of Research Updates in Polymer Science Pub Date : 2023-08-04 DOI: 10.6000/1929-5995.2023.12.08

Chao Wu, Shaoqing Liu, Jianping Guo, Hongqiang Ma, Li He

{"title":"Relationship between Thermal Conductivity and Compressive Strength of Insulation Concrete: A Review","authors":"Chao Wu, Shaoqing Liu, Jianping Guo, Hongqiang Ma, Li He","doi":"10.6000/1929-5995.2023.12.08","DOIUrl":"https://doi.org/10.6000/1929-5995.2023.12.08","url":null,"abstract":"Developing insulation concrete with high strength is essential for the construction of energy saving buildings. This is important to achieve carbon neutrality in the modern building industry. This paper reviews the existing studies in the literature on insulation concrete. This paper aims to reveal the correlation between the thermal conductivity and strength of concrete and identify the most effective method to make insulation concrete with lower thermal conductivity but higher strength. The review is carried out from two perspectives, including the effects of different foaming methods and various lightweight aggregates. As for the foaming methods, the chemical and mechanical foaming methods are discussed. As for the lightweight aggregates, cenospheres, porous aggregates, aerogels, and phase change materials are assessed. It is clearly observed that the thermal conductivity and compressive strength of concrete can be fitted by a linear function. As for the foaming methods, chemical foaming using hydrogen peroxide is the most effective to produce concrete with relatively lower thermal conductivity and higher compressive strength. For concrete with lightweight aggregates, cenospheres are the best option. Finally, recommendations are made to develop concrete with lower thermal conductivity and higher strength.","PeriodicalId":16998,"journal":{"name":"Journal of Research Updates in Polymer Science","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78322673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development and Characterization of Supercooled Polyethylene Naphthalate 过冷聚萘二甲酸乙二醇酯的研制与表征

Journal of Research Updates in Polymer Science Pub Date : 2023-07-26 DOI: 10.6000/1929-5995.2023.12.07

Jian Wang, Hang Li, P. Dai, Jinnan Chen

引用次数: 0

Topological Shape Optimization Design of the Whole Bead of 265/35R18 Steel-Belted Radial Tire 265/35R18钢带子午线轮胎全胎头拓扑形状优化设计

Journal of Research Updates in Polymer Science Pub Date : 2023-07-19 DOI: 10.6000/1929-5995.2023.12.06

Yong Li, Shuang Zhang, Tao Wang, K. Zhang, Long Chen, S. Han

引用次数: 0

Hemicellulose-g-PAAc/TiO2 Nanocomposite Hydrogel for Dye Removal 半纤维素-g- paac /TiO2纳米复合水凝胶染料脱除

Journal of Research Updates in Polymer Science Pub Date : 2023-07-05 DOI: 10.6000/1929-5995.2023.12.05

Yudan Li, Xiao-feng Sun, Jiayi Chen, Le Sun

{"title":"Hemicellulose-g-PAAc/TiO2 Nanocomposite Hydrogel for Dye Removal","authors":"Yudan Li, Xiao-feng Sun, Jiayi Chen, Le Sun","doi":"10.6000/1929-5995.2023.12.05","DOIUrl":"https://doi.org/10.6000/1929-5995.2023.12.05","url":null,"abstract":"Dyes pollution on urban environment is of great concern because of the human health hazards associated with this kind of contaminants, and the use of low-cost photocatalytic composite material is an efficient treatment method to minimize the environmental impact. A novel hemicellulose-g-PAAc/TiO2 composite hydrogel was prepared as a promising alternative material for dye removal. Wheat straw hemicellulose and TiO2 nanoparticles were first modified and then incorporated into hydrogel via covalent bonds. Effects of gel dosage, pH, initial concentration and contact time on the adsorption amount of methylene blue were systematically studied using the prepared hydrogel. The equilibrium adsorption data was fitted well to the Freundlich isotherm model, and Langmuir isotherm analysis indicated that the adsorption capacity of the hemicellulose-g-PAAc/TiO2 composite hydrogel was 389.1 mg/g, and adsorption kinetic study showed that the adsorption process can be described by the pseudo second-order kinetic model. The prepared composite hydrogel exhibited high photodegradation ability for methylene blue under alkaline conditions, and all results indicated that the hemicellulose-g-PAAc/TiO2 composite hydrogel had excellent photocatalytic degradability for dyes, which can be used in practical process.","PeriodicalId":16998,"journal":{"name":"Journal of Research Updates in Polymer Science","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81623018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Conjoint Effect of Boron Nitride and Surface-Enhanced Flake Graphite in Thermal Conductivity of Thermally Conductive Grease 氮化硼和表面增强片状石墨对导热润滑脂导热性能的共同影响

Journal of Research Updates in Polymer Science Pub Date : 2023-06-08 DOI: 10.6000/1929-5995.2023.12.04

Xiaojun Xiong, Yifan Li

{"title":"Conjoint Effect of Boron Nitride and Surface-Enhanced Flake Graphite in Thermal Conductivity of Thermally Conductive Grease","authors":"Xiaojun Xiong, Yifan Li","doi":"10.6000/1929-5995.2023.12.04","DOIUrl":"https://doi.org/10.6000/1929-5995.2023.12.04","url":null,"abstract":"The next generation of high-power electronic devices is expected to exhibit improved heat dissipation capabilities despite their smaller size. Current studies have investigated the utilization of hybrid fillers, our study introduces a novel approach by combining boron nitride (BN) and surface-enhanced flake graphite (G), both of which possess a platelet-like structure, to develop a thermally conductive grease. The grease shows an exceptionally high thermal conductivity of 2.21 W/mK and an extremely low electrical conductivity of 7.3×10-6 S/m. The viscosity of the grease is measured at 149 Pa·s. By incorporating hybrid fillers with a significantly high aspect ratio into EPON 828, a notable reduction of interfacial thermal resistance is observed, which is attributed to the formation of an effective pathway for phonon transfer facilitated by the unique characteristics of the hybrid fillers. Various theoretical models are employed to corroborate the experimental data, which facilitates substantiating the fundamental principles underlying the enhanced thermal conductivity of the prepared thermal grease.","PeriodicalId":16998,"journal":{"name":"Journal of Research Updates in Polymer Science","volume":"67 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86046882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design Concepts for Peel-Dominant Adhesive Joints in Aeronautic Applications 航空应用中以剥离为主导的粘合接头的设计概念

Journal of Research Updates in Polymer Science Pub Date : 2023-04-20 DOI: 10.6000/1929-5995.2023.12.03

J. Lopes, R. Campilho, M. A. Bellali, M. Baghdadi

{"title":"Design Concepts for Peel-Dominant Adhesive Joints in Aeronautic Applications","authors":"J. Lopes, R. Campilho, M. A. Bellali, M. Baghdadi","doi":"10.6000/1929-5995.2023.12.03","DOIUrl":"https://doi.org/10.6000/1929-5995.2023.12.03","url":null,"abstract":"The adhesive bonding technique is employed from the aeronautical/aerospace industry to current house products. To comply with the requirements of distinct applications, different joint configurations are available to the designer. While single-lap joints (SLJ) are the most common in application and research, double-lap joints, scarf joints and T-joints find specific applications. T-joints are seldom studied in the literature, but these are used, for instance, in aircraft to bond the stiffener beams to the skin, or in the cars between the B-pillar and the rocker. Due to the high stress concentrations, T-joints often fail under average stresses much lower than the adhesive strengths, giving rise to the necessity for proper design and strength improvement methodologies. This work initially aims to validate the cohesive zone modelling (CZM) technique with experiments, and then use it to numerically evaluate and optimize the performance of T-joints subjected to peel loads. CZM is nowadays regarded as the most powerful strength prediction tool for adhesive joints, and can be a valuable tool to improve T-joints. Different features are addressed for a complete analysis: adhesive type, geometrical parameters, dual-adhesive technique for strength improvement, and composite joints. The evaluated geometrical parameters are the base adherend thickness (a), T-part thickness (t), overlap or bonding length (l) and curvature radius (r). As a result of this work, the model was successfully validated, and clear design guidelines were provided to define the ideal geometric and material (adhesive) conditions for best performance.","PeriodicalId":16998,"journal":{"name":"Journal of Research Updates in Polymer Science","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77790026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical and Experimental Analyses of Hybrid Composites Made from Amazonian Natural Fibers 亚马逊天然纤维混杂复合材料的数值与实验分析

Journal of Research Updates in Polymer Science Pub Date : 2023-04-01 DOI: 10.6000/1929-5995.2023.12.02

G. G. del Pino, A. Bezazi, H. Boumediri, J. L. Valín Rivera, A. C. Kieling, Sofia Dehaini Garcia, José Costa de Macêdo Neto, Marcos Dantas dos Santos, T. Panzera, Aristides Rivera Torres, César Alberto Chagoyen Méndez, F. V. Valenzuela Díaz

{"title":"Numerical and Experimental Analyses of Hybrid Composites Made from Amazonian Natural Fibers","authors":"G. G. del Pino, A. Bezazi, H. Boumediri, J. L. Valín Rivera, A. C. Kieling, Sofia Dehaini Garcia, José Costa de Macêdo Neto, Marcos Dantas dos Santos, T. Panzera, Aristides Rivera Torres, César Alberto Chagoyen Méndez, F. V. Valenzuela Díaz","doi":"10.6000/1929-5995.2023.12.02","DOIUrl":"https://doi.org/10.6000/1929-5995.2023.12.02","url":null,"abstract":"The application of lignocellulosic fibers as reinforcements in composite materials has found increasing use in recent years, due to the attractive characteristics of natural fibers such as their low cost, high specific modulus, biodegradability, abundance and with many technical qualities. Natural fiber hybrid composites are very frequently used in automotive aerospace and other industries. In this work, numerical and experimental analysis is carried out to compare curauá, jute and sisal fibers in epoxy composites for use in industry. The most appropriate hybridization effect by establishing the amounts of each fiber on the mechanical properties was considered. Finite Element Models were designed and validated through mechanical tests. The number of Finite Element models and specimens performed was determined through the design of experiments using the Taguchi Method and then the results were statistically validated. Higher strength was obtained in composites made with curauá fiber, followed by jute and sisal fibers. Such behavior was achieved by FEM and experimental tests, revealing an increase in tensile strength by increasing the amount of fibers up to 35% in total. Higher strength was achieved when the composite was made with curauá (20 wt.%), jute (10 wt.%) and sisal (5 wt.%) fibers. The results show a good agreement between the FEM and the experimental tests. Furthermore, the results of the present study were compared with those obtained previously mentioned in the open literature.","PeriodicalId":16998,"journal":{"name":"Journal of Research Updates in Polymer Science","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76915865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Dynamic Elastic Modulus Variability in Anisotropic and Isotropic Materials: Comparison by Acoustic Emission 各向异性和各向同性材料的动态弹性模量变化:声发射的比较

Journal of Research Updates in Polymer Science Pub Date : 2023-03-09 DOI: 10.6000/1929-5995.2023.12.01

Henrique Pina Cardim, Larissa Q. Minillo, Fernando Nakao, A. Ortenzi

{"title":"Dynamic Elastic Modulus Variability in Anisotropic and Isotropic Materials: Comparison by Acoustic Emission","authors":"Henrique Pina Cardim, Larissa Q. Minillo, Fernando Nakao, A. Ortenzi","doi":"10.6000/1929-5995.2023.12.01","DOIUrl":"https://doi.org/10.6000/1929-5995.2023.12.01","url":null,"abstract":"This study compared the variation of the dynamic elastic modulus (E) of three types of composite pipes made by the filament winding process and a steel alloy specimen, according to signal source changes. The specimens were produced with three different winding angles, i.e., ±50°, ±52.5°, and ±55°. The moduli were obtained through a known signal source and the angular variation, according to two sensors positioned over the specimen's surface. In a previous article, the variation in the velocity of acoustic emission (AE) signals, performed in the same type of pipes, was discussed based on the standards for glass fiber-reinforced epoxy (GFRE) filament wound specimens. This work took these preliminary findings to compare with the results found for steel alloy pipes (SAE 1020). This data was used with appropriate equations to determine the dynamic elastic moduli of each material. It was found that, even for small angular differences, the modulus changes position concerning the lamination angle. Thus, the lower the quality control, the lower the final product with composite materials. As expected, for isotropic materials such as steel alloys, the modulus remains constant along the angles, while for anisotropic ones, it is dependent on the principal directions of stress and strain, or on the other hand, dependent on the correlation between the angular wave velocity of the AE signals.","PeriodicalId":16998,"journal":{"name":"Journal of Research Updates in Polymer Science","volume":"147 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73245088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Annealing Temperature Effect on Structural and Luminescence Spectroscopy of Y2SiO5:Ce3+ Nanomaterial Synthesized by Sol–Gel Method 退火温度对溶胶-凝胶法制备Y2SiO5:Ce3+纳米材料结构和发光光谱的影响

Journal of Research Updates in Polymer Science Pub Date : 2022-12-31 DOI: 10.6000/1929-5995.2022.11.08

M. Hamroun, A. Guenanou, L. Guerbous, R. Chebout, K. Bacharı

引用次数: 0

A Simplified Analytical Solution for the Computation of Machine Path in Filament Winding of Cylindrical Angle-Ply and Double-Double Structures 圆柱角-铺层及双-双结构绕丝机径计算的简化解析解

Journal of Research Updates in Polymer Science Pub Date : 2022-12-16 DOI: 10.6000/1929-5995.2022.11.07

A. Andrianov, A.P.F. Militão

引用次数: 0