Polymers & Polymer Composites最新文献_第2页

Synthesis and properties of a nonionic water-based epoxy curing agent 一种非离子型水基环氧固化剂的合成与性能

4区材料科学

Polymers & Polymer Composites Pub Date : 2023-09-20 DOI: 10.1177/09673911231201049

Tao Guo, Xu Youhui, Chen Ziran, Yang Fan, Wang Jiexue, Chang Bo, Chen Congdi, Han Tao

{"title":"Synthesis and properties of a nonionic water-based epoxy curing agent","authors":"Tao Guo, Xu Youhui, Chen Ziran, Yang Fan, Wang Jiexue, Chang Bo, Chen Congdi, Han Tao","doi":"10.1177/09673911231201049","DOIUrl":"https://doi.org/10.1177/09673911231201049","url":null,"abstract":"Owing to the requirement for environmental protection, water-based coatings have become a significant trend in the development of coatings. The water-based epoxy curing agent has also become a hot research topic. In this study, a B-A-B epoxy compound with a long hydrophobic alkyl chain connected to the intermediate nitrogen atom was synthesized at both ends of a molecule using ethylene glycol diglycidyl ether and 3,4-dimethoxyaniline as raw materials. Subsequently, the epoxy compound was sealed with triethylenetetramine. A nonionic, water-based epoxy resin curing agent with amino groups at both ends of the molecule was prepared. The target product structure was confirmed by infrared spectroscopy (IR), Mass spectrum (MS), and Nuclear magnetic resonance hydrogen spectroscopy ( 1 H-NMR). Additionally, through three factors and three levels of orthogonal experimental design, the optimum experimental conditions were confirmed, the optimum yield was 82.83%. The thermogravimetric analysis (TGA) indicated that the monomer exhibited a significant weight loss in the temperature range of 320–450°C. The pencil hardness, flexibility, and impact resistance of the waterborne epoxy resin coating film prepared by the non-ionic water-based epoxy curing agent reached or exceeded those of similar products at China and foreign countries.","PeriodicalId":20322,"journal":{"name":"Polymers & Polymer Composites","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136308149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

A computational study of the calendering processes using Oldroyd 8-constant fluid with slip effects 具有滑移效应的Oldroyd 8常数流体压延过程的计算研究

4区材料科学

Polymers & Polymer Composites Pub Date : 2023-09-20 DOI: 10.1177/09673911231202888

Muhammad A Javed, Zeeshan Asghar, Hafiz Muhammad Atif, Mehreen Nisar

{"title":"A computational study of the calendering processes using Oldroyd 8-constant fluid with slip effects","authors":"Muhammad A Javed, Zeeshan Asghar, Hafiz Muhammad Atif, Mehreen Nisar","doi":"10.1177/09673911231202888","DOIUrl":"https://doi.org/10.1177/09673911231202888","url":null,"abstract":"The analyses of the calendering processes using Oldroyd 8-constant fluid model with the non-linear slip condition effects are discussed in this paper. To model the flow equations for the study of calendering, we utilized the conservation of mass, momentum equations, and Oldroyd 8-constant model. The final equations are reduced into fourth order differential equations by utilizing lubrication approximation theory (LAT). MATLAB’s built-in function bvp4c is employed to calculate the stream function and the fluid velocity. Furthermore, pressure gradient, pressure, and mechanical quantities of calendering processes are obtained by fourth-order Runge-Kutta method. The effects of the slip and material parameters of Oldroyd 8-constant fluid on the physical quantities related to calendering are illustrated via graphical figures. The presence of slip is resistive to length of contract and pressure distribution. On the other hand the pressure showed the increasing trend with increase the value of material parameter ([Formula: see text]). The engineering quantity such as force function show decreasing with increase the values of the slip parameter K. As evident from the study, the material parameters play a crucial role in controlling the pressure, thereby influencing the final sheet thickness and separating force. With an increase in the material parameter [Formula: see text], both the sheet thickness and roll-separating force show a corresponding increase.","PeriodicalId":20322,"journal":{"name":"Polymers & Polymer Composites","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136313577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Study on space charge accumulation characteristics of 320 kV cross-linked polyethylene cable joints 320kv交联聚乙烯电缆接头空间电荷积累特性研究

4区材料科学

Polymers & Polymer Composites Pub Date : 2023-09-09 DOI: 10.1177/09673911231195194

Yuqi Liu, Xinjing Cai, Dan Zhang

{"title":"Study on space charge accumulation characteristics of 320 kV cross-linked polyethylene cable joints","authors":"Yuqi Liu, Xinjing Cai, Dan Zhang","doi":"10.1177/09673911231195194","DOIUrl":"https://doi.org/10.1177/09673911231195194","url":null,"abstract":"High-Voltage Direct Current (HVDC) cable accessories are the key equipment to connect HVDC cables, and also the weak link in the cable system. In order to investigate the transport characteristics of space charge in cable joints, a two-dimensional axisymmetric cable joint model was established using the bipolar charge transport model, and its space charge and electric field distribution were analyzed through numerical simulation. Furthermore, the effects of the trap depth based on molecular chain displacement and temperature field on interface charge distribution of cable joint were compared with the basic model, respectively. The results show that the stress cone root and the top of the high-voltage shield are easy to accumulate space charges, which will lead to electric field distortion. The trap depth based on molecular chain displacement is larger than that of basic model at the insulation interface, which hinders the charge transport. The model without considering the effect of temperature field accumulates less charge, and the electric field and space charge at the stress cone root and the top of the high-voltage shield change gently with time. The above research results can provide a reference for the design and optimization of cable joints.","PeriodicalId":20322,"journal":{"name":"Polymers & Polymer Composites","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136191871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Retraction notice: “Evaluation of intercalation and interaction in in-situ polymerized PLA-HNT bionanocomposites” 撤回通知:“原位聚合PLA-HNT生物纳米复合材料的嵌入和相互作用评价”

4区材料科学

Polymers & Polymer Composites Pub Date : 2023-03-22 DOI: 10.1177/09673911231164914

引用次数: 0

Biodegradation Properties of Melt Processed PBS/Chitosan Bio-Nanocomposites with Silica, Silicate,and Thermally Reduced Graphene 含二氧化硅、硅酸盐和热还原石墨烯的熔融处理PBS/壳聚糖生物纳米复合材料的生物降解性能

IF 2.1 4区材料科学

Polymers & Polymer Composites Pub Date : 2018-02-01 DOI: 10.1002/PC.23947

V. Mittal, N. Matsko, F. Patwary

{"title":"Biodegradation Properties of Melt Processed PBS/Chitosan Bio-Nanocomposites with Silica, Silicate,and Thermally Reduced Graphene","authors":"V. Mittal, N. Matsko, F. Patwary","doi":"10.1002/PC.23947","DOIUrl":"https://doi.org/10.1002/PC.23947","url":null,"abstract":"Melt processed bio-nanocomposites of poly(butylene succinate) (PBS)-chitosan (CS) generated with varying amounts of silica, alumina-silicate, and thermally reduced graphene were analyzed for their biodegradation behavior. The nanocomposite samples were embedded in soil under natural environment for varying periods of time and the weight loss analysis was complemented with changes in surface morphology, crystallinity, and thermal degradation. Both the type and amount of filler were observed to affect the extent of biodegradation, though no change in biodegradation mechanism occurred. Nanocomposites had in general lower extent of weight loss than the pure blend, but the extensive surface roughness and cracks were observed for all systems indicating the initiation of biodegradation. Silica and silicate nanocomposites exhibited higher extent of biodegradation in comparison with graphene nanocomposites possibly because of the obstructive pathways to microbes in the presence of high aspect ratio graphene platelets. The crystallinity in the pure blend and nanocomposites was observed to increase as a function of embedding time because of degradation of the random amorphous material in the initial degradation phase. Subsequently, the increase levelled off because of attack of microbes on more organized crystalline content, which was also supported by the reduction in overall weight loss. Increase in melting point of PBS with embedding time as well as depletion of CS flakes from the cross-section of the composites in AFM confirmed that CS was degraded earlier than PBS. Thermal analysis also indicated faster onset of degradation of CS with soil burial time. The degradation studied through TGA-MS also revealed that degradation was accompanied by evolution of H2O, CO2, and NH3, along with other components. The temperature of evolution of these components from the nanocomposites was also affected during different stages of biodegradation. POLYM. COMPOS., 2016. © 2016 Society of Plastics Engineers","PeriodicalId":20322,"journal":{"name":"Polymers & Polymer Composites","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2018-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87313788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 6

The Mechanical and Optical Properties of Injection-moulded PMMA, Filled with Glass Particles of a Matching Refractive Index 具有匹配折射率的玻璃微粒填充的注塑PMMA的力学和光学性能

IF 2.1 4区材料科学

Polymers & Polymer Composites Pub Date : 2017-07-01 DOI: 10.1177/096739111702500604

Wildner Wolfgang, Drummer Dietmar

引用次数: 8

Thermal Stability of Optically Transparent Alpha-Zirconium Phosphate/Poly(methyl methacrylate) Nanocomposites with High Particle Loading 光学透明磷酸锆/聚甲基丙烯酸甲酯纳米复合材料的热稳定性

IF 2.1 4区材料科学

Polymers & Polymer Composites Pub Date : 2017-05-01 DOI: 10.1177/096739111702500403

C. Logan, Diaz Agustin, W. Qingsheng, Cheng Zhengdong, Mannan M. Sam

引用次数: 4

Influence of Fibre Treatment on the Characteristics of Buriti and Ramie Polyester Composites 纤维处理对布里蒂和苎麻-聚酯复合材料性能的影响

IF 2.1 4区材料科学

Polymers & Polymer Composites Pub Date : 2017-05-01 DOI: 10.1177/096739111702500401

Lavoratti Alessandra, Romanzini Daiane, C. Sandro, J. Z. Ademir

引用次数: 12

Effect of Aminosilane Concentrations on the Properties of Poly(Lactic Acid)/Kenaf-Derived Cellulose Composites 氨基硅烷浓度对聚乳酸/红麻纤维素复合材料性能的影响

IF 2.1 4区材料科学

Polymers & Polymer Composites Pub Date : 2017-01-01 DOI: 10.1177/096739111702500110

Yee Bond Teea, Rosnita A. Talibb, Khalina Abdand, Nyuk Ling Chinb, Roseliza Kadir Bashab, Khairul Faezah Md Yunosb

引用次数: 12

NANOSCALE BOEHMITE FILLER FOR CORROSION AND WEAR RESISTANT POLYPHENYLENESULFIDE COATINGS. 纳米级薄水铝石填料，用于耐腐蚀和耐磨聚苯硫醚涂层。

IF 2.1 4区材料科学

Polymers & Polymer Composites Pub Date : 2004-03-01 DOI: 10.2172/812306

T. Sugama

引用次数: 2