High Performance Polymers最新文献_第6页

Synthesis and characterization of 4-pyridine-bridge polybenzimidazolefor proton exchange membranes 质子交换膜用4-吡啶桥聚苯并咪唑的合成与表征

IF 2.1 4区化学

High Performance Polymers Pub Date : 2023-06-07 DOI: 10.1177/09540083231181926

Yashesh J Rathwa, Navin P. Chikhaliya

{"title":"Synthesis and characterization of 4-pyridine-bridge polybenzimidazolefor proton exchange membranes","authors":"Yashesh J Rathwa, Navin P. Chikhaliya","doi":"10.1177/09540083231181926","DOIUrl":"https://doi.org/10.1177/09540083231181926","url":null,"abstract":"A series of polybenzimidazoles (PBIs) incorporated main chain 4-pyridine bridge groups were synthesized from 4,4′-([4,4′-bipyridine]-2,6,-diyl)bis (benzene-1,2-diamine) which reacted with four different diacids like isophthalic acid,4,4′-Oxibis benzoic acid, 5-amino isophthalic acid and 2,5-pyridine dicarboxylic acid using polyphosphoric acid as solvent. A process termed dispersion polymerizationhas been developed to prepare PBIs.For the membranepreparation, 4-pyridine-bridge polybenzimidazole (Py-PBI) productswere re-dissolved in dimethyl sulfoxide and cast. The polymer structure characterization included FT-IR, UV, Powder XRD, Water Uptake, Swelling Ratio, Ion exchange capacity, Acid doping, Acid leaching, Oxidative stability, and Polymer inherent viscosity find out by using Ubbelohde viscometer whilethermal stability assessments via thermogravimetric analysis. The Py-PBI-based polymer electrolyte membranes’ mechanical properties measurement showed that the 4-pyridine-bridge PBIs membranes were flexible, thermally stable, and mechanically strong when compared with conventional PBI. The current-voltage (I-V) characteristics of the 4-Py-PBI membrane show that the conductivity of the 4441P membrane is 0.546 S cm−1. Graphical Abstract","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":"35 1","pages":"839 - 850"},"PeriodicalIF":2.1,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42894506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on the heating rate of induction heating CFRP and temperature field based on image entropy 基于图像熵的CFRP感应加热升温速率及温度场研究

IF 2.1 4区化学

High Performance Polymers Pub Date : 2023-06-06 DOI: 10.1177/09540083231182062

Zhijian Pei, Zhihui Deng, Xinmin Shi, H Zhao

{"title":"Research on the heating rate of induction heating CFRP and temperature field based on image entropy","authors":"Zhijian Pei, Zhihui Deng, Xinmin Shi, H Zhao","doi":"10.1177/09540083231182062","DOIUrl":"https://doi.org/10.1177/09540083231182062","url":null,"abstract":"The electromagnetic induction heating technology has the advantages of fast heating speed and cleanness, and can realize the rapid temperature curing of carbon fiber reinforced polymer (CFRP). In order to improve production efficiency and curing quality, a finite element model of induction heating CFRP was established, and the temperature field distribution and heating mechanism during induction heating of CFRP were analyzed. The correctness of the model and conclusion is verified by experiments. On this basis, the influence of current, diameter, frequency and distance on the heating rate is analyzed, and it is found that frequency has the greatest influence on the heating rate. In addition, the mathematical relationship between temperature field uniformity and entropy value is established, which provides a quantitative analysis method for the temperature field uniformity of induction heating CFRP. Through optimization analysis, it is obtained that for the CFRP mentioned in the article, the coil size is selected between 65 mm and 95 mm, and the spacing is between 3.5 mm and 6.5 mm, so that the temperature field has the best uniformity.","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":"35 1","pages":"827 - 838"},"PeriodicalIF":2.1,"publicationDate":"2023-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47859091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the potential of benzoxazine-based nanocomposites for lightweight neutron shielding applications 探索苯并恶嗪基纳米复合材料在轻质中子屏蔽方面的应用潜力

IF 2.1 4区化学

High Performance Polymers Pub Date : 2023-05-25 DOI: 10.1177/09540083231179114

S. Abdous, M. Derradji, Z. Mekhalif, Karim Khiari, Oussama Mehelli, Younes Bourenane Cherif

{"title":"Exploring the potential of benzoxazine-based nanocomposites for lightweight neutron shielding applications","authors":"S. Abdous, M. Derradji, Z. Mekhalif, Karim Khiari, Oussama Mehelli, Younes Bourenane Cherif","doi":"10.1177/09540083231179114","DOIUrl":"https://doi.org/10.1177/09540083231179114","url":null,"abstract":"Given their substantial neutron capture cross-section, extreme hardness, and high chemical and thermal stability, boron-based materials are widely used as building blocks to protect against highly ionizing radiations such as gamma rays and neutrons. Indeed, uncontrolled nuclear radiation exposure can be highly hazardous to radiation workers and the general public. In this sense, this work presents an extensive study and experimental evaluation of the nuclear shielding features of boron carbide (B4C) based nanocomposite, where bisphenol-A based polybenzoxazine (BA-PBz) was used as matrix. The latter was used for its wide range of interesting properties that overcome some of the shortcomings of conventional phenolic resins. A two-pot synthesis process was adopted for the synthesis of (BA-Bz) monomer. Moreover, the boron carbide nanoparticles were treated with a silane (KH-560) coupling agent in order to improve the intramolecular interactions with the polymeric matrix. The neutron shielding studies were carried out at the Nuclear Research reactor of Algeria NUR. The results showed that the developed boron carbide-based nanocomposite exhibits intriguing shielding performances and good thermal stability. The highest performances were obtained at a B4C concentration of 5. wt %, where the macroscopic cross section was found to be (Σ = 3.3878 cm−1) with a screening ratio of (S = 97.78%).","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":"35 1","pages":"812 - 826"},"PeriodicalIF":2.1,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43157661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

High-damping polyurethane-based composites modified with amino-functionalized graphene 氨基功能化石墨烯改性高阻尼聚氨酯基复合材料

IF 2.1 4区化学

High Performance Polymers Pub Date : 2023-05-15 DOI: 10.1177/09540083231175475

Chin-Yi Ma, Yi Shan, Na Wang, Jianjian Jiao, Yingdan Wang, Fan Li, L. T. Sin

{"title":"High-damping polyurethane-based composites modified with amino-functionalized graphene","authors":"Chin-Yi Ma, Yi Shan, Na Wang, Jianjian Jiao, Yingdan Wang, Fan Li, L. T. Sin","doi":"10.1177/09540083231175475","DOIUrl":"https://doi.org/10.1177/09540083231175475","url":null,"abstract":"A series of damping composites containing polyurethane/poly (butyl methacrylate) (PU/PBMA) as the polymer matrix and graphene nanoplates (GNP) or amino-functionalized graphene nanoplates (NGNP) as a modifier was successfully synthesized through in situ polymerization. The chemical structure, microphase configuration, damping properties, and thermal stability of the GNP–PU/PBMA and NGNP–PU/PBMA composites were evaluated. Fourier-transform infrared and X-ray photoelectron spectroscopic studies revealed that the amino (–NH2) groups on the NGNP surface presumably reacted with the isocyanate (R–N = C = O) groups of the polymer matrix. This led to robust bonding between the NGNP and the hard segments in PU, resulting in an NGNP/polymer-matrix compatibility superior to that of GNP–PU/PBMA. Structural investigations based on scanning electron microscopy and atomic force microscopy revealed dispersion-state-related differences between the GNP and NGNP in the PU/PBMA matrix; the amino-functionalized GNP were more uniformly dispersed in the polymer matrix than their unmodified counterparts, and microphase separation between the hard and soft segments intensified in NGNP–PU/PBMA, resulting in a greater degree of phase separation, as confirmed by small-angle X-ray scattering analysis. Dynamic mechanical analysis (DMA) revealed that the maximum damping peak (tanδmax) of the composite with 0.7 wt.% NGNP was 22.7% higher than that of pristine PU/PBMA. Additionally, a large independent damping peak appeared in the DMA curve of 0.7 wt.% NGNP–PU/PBMA in the high-temperature range, indicating broadening of the damping temperature range. Moreover, the NGNP incorporation effectively improved the thermal stability of the composite. Overall, this study demonstrates the viability of realizing PU-based materials with excellent thermodynamic and damping properties by incorporating amino-bearing NGNP.","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":"35 1","pages":"795 - 811"},"PeriodicalIF":2.1,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48518058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-stoichiometric effect in the superacid-catalyzed polyhydroxyalkylation of biphenyl and 1-propyl isatin 超强酸催化联苯与1-丙基isatin多羟基烷基化反应的非化学计量效应

IF 2.1 4区化学

High Performance Polymers Pub Date : 2023-05-15 DOI: 10.1177/09540083231174371

Alfredo Cruz-Rosado, Juan Enrique Romero‐Hernández, Marlene Ríos‐López, S. López-Morales, G. Cedillo, L. Ríos-Ruiz, Enoc Cetina-Mancilla, J. Palacios-alquisira, M. Zolotukhin, E. Vivaldo‐Lima

引用次数: 0

Synthesis and Characterization of Novel Non-conjugated hyperbranched polysiloxane with AIE Effect 具有AIE效应的新型非共轭超支化聚硅氧烷的合成与表征

IF 2.1 4区化学

High Performance Polymers Pub Date : 2023-05-12 DOI: 10.1177/09540083231174783

Rui‐Feng Song, Dongbo Yan, Fan Xi, Junyou Cao, Yue Wang, Xiaomeng Yang

{"title":"Synthesis and Characterization of Novel Non-conjugated hyperbranched polysiloxane with AIE Effect","authors":"Rui‐Feng Song, Dongbo Yan, Fan Xi, Junyou Cao, Yue Wang, Xiaomeng Yang","doi":"10.1177/09540083231174783","DOIUrl":"https://doi.org/10.1177/09540083231174783","url":null,"abstract":"To obtain unconjugated hyperbranched polysiloxane (HBPSi), the triethoxyvinylsilane (A-151) and simple polyol compounds were used as raw materials, and two kinds of unconjugated HBPSi which the terminal group is -OH group and C=C bond were synthesized via a simply transesterification condensation, and the factors that affecting their luminescence are also further discussed. The results showed that, both of these two HBPSi exhibits excellent aggregate induced emission effect. The structure rich in π electrons or lone pair electrons in the raw materials basically maintains its original state in the polymer, and the spatial conjugation of the two leads to the luminescence of non-conjugated polymers. A large number of -OH groups in the polymer can form hydrogen bonds, and the promotion of hydrogen bonds makes the target products further gather spontaneously, which further enhances the spatial conjugation and improves the rigidity of the molecules. It can be concluded that under certain conditions, the larger steric hindrance of the molecule itself will affect the polymerization degree of the final product and the aggregation degree of the polymer molecule, while low polymerization and aggregation degree will result in higher energy required for the material to fluoresce. This study provides some reference significance for the preparation of non-conjugated luminescent materials with higher fluorescence intensity.","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":"1 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41369317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nonlinear optical materials based on fluorinated polyurethane-imides and their application in waveguide devices 基于氟化聚氨酯酰亚胺的非线性光学材料及其在波导器件中的应用

IF 2.1 4区化学

High Performance Polymers Pub Date : 2023-05-12 DOI: 10.1177/09540083231175974

Long-De Wang, L. Tong, Jie-Wei Rong, Jian-Wei Wu

{"title":"Nonlinear optical materials based on fluorinated polyurethane-imides and their application in waveguide devices","authors":"Long-De Wang, L. Tong, Jie-Wei Rong, Jian-Wei Wu","doi":"10.1177/09540083231175974","DOIUrl":"https://doi.org/10.1177/09540083231175974","url":null,"abstract":"Two monomers, a second-order nonlinear optical azo chromophore C containing a tricyanofuran electron acceptor and a dihydroxyethyl nitrogen electron donor, and a bisphenol AF-type diether dianhydride (BPAFDA), were designed and synthesized. Fluorinated polyurethaneimide (PUI) electro-optic (EO) waveguide materials were prepared using the synthesized monomers polymerized with 4,4′-diphenylmethane diisocyanate (MDI). The structures of the synthesized chromophore C, BPAFDA, and polymers of PUI were characterized by 1HNMR and FTIR, and the thermal properties of the polymers were characterized by DSC and TGA. The prepared PUI exhibited good film-forming properties with glass transition temperatures (Tg) between 160–169°C and over 300°C at 5% thermal weight loss in a nitrogen atmosphere. The experimental results showed that the fluorinated PUIs possessed an EO coefficient of 56–60 p.m./V at 1550 nm and the optical propagation loss of the polymer waveguide was between 1.3–1.4 dB/cm at 1550 nm. Using PUI as the core material of the waveguides, EO modulators with Mach-Zehnder (MZ) structure were designed and prepared, showing good EO modulation performance at 1550 nm.","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":"35 1","pages":"785 - 794"},"PeriodicalIF":2.1,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42930279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surface modification of kevlar fabric with a novel sulfonyl aryl containing monomer and its influence on inter yarn friction 新型磺酰基芳基单体对芳纶织物的表面改性及其对纱间摩擦的影响

IF 2.1 4区化学

High Performance Polymers Pub Date : 2023-05-04 DOI: 10.1177/09540083231172896

G. Agarwal, I. Sharma, J. Prakash, Pal Dinesh Kumar, S. Verma

{"title":"Surface modification of kevlar fabric with a novel sulfonyl aryl containing monomer and its influence on inter yarn friction","authors":"G. Agarwal, I. Sharma, J. Prakash, Pal Dinesh Kumar, S. Verma","doi":"10.1177/09540083231172896","DOIUrl":"https://doi.org/10.1177/09540083231172896","url":null,"abstract":"The ballistic impact response of Kevlar textiles is significantly influenced by the friction between the yarns. It increases the dissipation of energy when yarns begin to displace relative to one another and it also results in to transfer of load to a larger area during ballistic impacts. In the present work, a novel sulfonyl aryl group containing monomer acrylic acid-2-(toluene sulphonyl amine)-ethyl ester (AATSAEE) was synthesized by a three-step process with ethanol amine and p-toluene sulfonic acid as starting material. The monomer was homopolymerized and grafted on Kevlar fabric by UV-induced free radical polymerization technique. Benzoyl peroxide (BPO) was used as initiator. Utilizing spectroscopic and thermal gravimetric methods, the monomer, precursor, and the homopolymer were characterized. The yarn pull-out tests on unmodified and AATSAEE grafted Kevlar fabrics were performed on Universal Tensile Tester at a steady speed of the upper jaw of 50 cm min−1. Increases in yarn pull out force have been noted with grafting of AATSAEE on Kevlar fabric. The peak force increases around 284% with grafting which indicates an increase in friction forces. When these yarns start to move apart from one another due to friction factors, the fabric’s energy dissipation increases and it may results in to increase in energy absorption at the time of ballistic impacts.","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":"35 1","pages":"764 - 772"},"PeriodicalIF":2.1,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47209984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Epoxy-based ZnO nanocomposites in various configurations: Corona discharges and thermal transition studies 不同结构的环氧基ZnO纳米复合材料：电晕放电和热转变研究

IF 2.1 4区化学

High Performance Polymers Pub Date : 2023-05-03 DOI: 10.1177/09540083231167743

Mihir N. Velani, Ritesh Patel

{"title":"Epoxy-based ZnO nanocomposites in various configurations: Corona discharges and thermal transition studies","authors":"Mihir N. Velani, Ritesh Patel","doi":"10.1177/09540083231167743","DOIUrl":"https://doi.org/10.1177/09540083231167743","url":null,"abstract":"Polymeric epoxy-based nanocomposites have tremendously grown in electronic and indoor high-voltage insulation applications over the last two decades. The interface between the epoxy resin and inorganic fillers surprisingly improves the performance compared to neat epoxy and conventional ceramic insulators. However, several configurations, including the filler loading, filler size, and synthesis process, substantially impact performance. Dielectrics employed in power equipment are often exposed to corona discharges, causing surface erosion and may cause flashover due to prolonged exposure to the discharges. Also, dielectrics must continuously endure heat from leakage currents or surrounding temperatures. The present work examines various configurations of the epoxy/ZnO composites for the corona discharge resistance and thermal stability: the effect of filler loading, preparation method of nanocomposites, and co-filling of nano-micro fillers. The ZnO nanoparticles were disseminated in the epoxy resin using a probe and bath sonicator with and without solvent. It also includes the impact of heated nanoparticles. The corona discharge tests were performed using a set-up similar to CIGRE working group D1.24. The studies of surface degradation were conducted using surface roughness metrics obtained from an optical 3D profilometer. Differential scanning calorimetry (DSC) was used to perform the thermal analyses as per ASTM E1356. It was found that compared to all the filled specimens, the neat epoxy experienced more severe erosion. In addition, the specimen filled with ZnO nanoparticles endured positive corona discharges compared to negative and AC discharges. The specimen prepared with heated nanoparticles without solvent using a probe sonicator showed high heat energy and heat capacity leading to thermal instability. Besides, the interface between nano-micro particles and the host material increases corona discharge resistance and thermal stability.","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":"35 1","pages":"750 - 763"},"PeriodicalIF":2.1,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48101356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research advances in preparation, mechanism and application of thermally conductive and electrically insulating polymer composites in thermal management materials: A review 导热与电绝缘聚合物复合材料在热管理材料中的制备、机理及应用研究进展

IF 2.1 4区化学

High Performance Polymers Pub Date : 2023-04-10 DOI: 10.1177/09540083231164342

Qian-You Wang, Y. Li

{"title":"Research advances in preparation, mechanism and application of thermally conductive and electrically insulating polymer composites in thermal management materials: A review","authors":"Qian-You Wang, Y. Li","doi":"10.1177/09540083231164342","DOIUrl":"https://doi.org/10.1177/09540083231164342","url":null,"abstract":"Today, electronic components are gradually developing towards miniaturization and multi-function. During the use of electronic components, a large amount of heat will be generated, which seriously limits the performance and service life of electronic components. Therefore, the preparation of thermal management material (TMMs) with high thermal conductivity (λ) can effectively solve the problem of thermal accumulation in electronic components. Compared with the preparation of intrinsic thermal conductive polymer composite, the method of filling thermal conductive filler in polymer matrix can better improve the λ of polymer composite. This review discusses the heat conduction mechanism of polymer and the factors affecting λ of polymer composites, including the type of filler, the shape and distribution of filler, and the functional surface treatment of filler. Then, the different methods of preparing thermally conductive and electrically insulating polymer composites (TCEIPCs) are introduced in detail. The application of polymer composites in thermal management is also introduced.","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":"35 1","pages":"665 - 685"},"PeriodicalIF":2.1,"publicationDate":"2023-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47787267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0