High Performance Polymers最新文献_第10页

Fabrication, mechanical and electrical properties of polyimide films cured at low-temperature assisted by microwave radiation 微波辅助低温固化聚酰亚胺薄膜的制备及其力学和电学性能

IF 2.1 4区化学

High Performance Polymers Pub Date : 2022-11-01 DOI: 10.1177/09540083221100366

K. Tao, Fei Qin, Yahui Li, Shuai Zhang, Shihui Han, Guangming Liu, Jun Wang, Junchang Shen, Zailin Yang, Yi Tang, Gaohui Sun

{"title":"Fabrication, mechanical and electrical properties of polyimide films cured at low-temperature assisted by microwave radiation","authors":"K. Tao, Fei Qin, Yahui Li, Shuai Zhang, Shihui Han, Guangming Liu, Jun Wang, Junchang Shen, Zailin Yang, Yi Tang, Gaohui Sun","doi":"10.1177/09540083221100366","DOIUrl":"https://doi.org/10.1177/09540083221100366","url":null,"abstract":"Polyimide (PI) films with excellent mechanical and electrical properties were produced at a low temperature assisted by microwave. Depending on the reciprocating movement of dipole molecules excited by microwave, even though under a low temperature, the rotation and conformational changes of functional groups could also be promoted. Thus, reaction between N-H bond and -OH in carboxyl which could realize dehydration and cyclization of polyamic acid proceeded normally. Results revealed that the combination between ambient temperature only at 70°C and microwave power at 2000 W or higher could also produce PI films with imidization degree of 100%. For PI-2000W, compared with traditional PI film (PI-300°C) that generated only at temperature of 300°C, even though on the basis of no any change in molecular structure and addition of filler, the tensile strength, elastic modulus, crystallinity, and apparent density increased by about 21%, 51%, 37%, and 5%, respectively. For electrical properties, conductivity enhanced by one to two orders of magnitude comparing with PI-300°C. Results indicated that while keeping the original molecular structure of PI films unchanged, this work provided a new and effective method to assist the enhancement in mechanical and electrical properties of PI films.","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":"34 1","pages":"998 - 1008"},"PeriodicalIF":2.1,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46455199","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

A novel proton exchange membrane derived from trisulfonated poly(arylene ether phosphine oxide) containing diphenyl ether moieties 一种新型质子交换膜，由含有二苯基醚部分的三磺化聚(芳烯醚氧化膦)衍生而成

IF 2.1 4区化学

High Performance Polymers Pub Date : 2022-11-01 DOI: 10.1177/09540083221098618

S. Mao, Yajie Wang, Liqin Kang, Huiying Liao, Huiping Liu

引用次数: 0

Friction and wear characteristics of synthetic diamond and graphene-filled polyether ether ketone composites 合成金刚石和石墨烯填充聚醚醚酮复合材料的摩擦磨损特性

IF 2.1 4区化学

High Performance Polymers Pub Date : 2022-10-29 DOI: 10.1177/09540083221137647

Vishal Kumar, Rajkumar Kaliyamoorthy

{"title":"Friction and wear characteristics of synthetic diamond and graphene-filled polyether ether ketone composites","authors":"Vishal Kumar, Rajkumar Kaliyamoorthy","doi":"10.1177/09540083221137647","DOIUrl":"https://doi.org/10.1177/09540083221137647","url":null,"abstract":"Modifying tribo films using filler particles is a significant area of research in developing polymer-based tribo components to minimize material loss during the sliding process. This study focused on altering the wear characteristics of a polyetheretherketone (PEEK)/graphene high-performance polymer composite to strengthen the tribo film by adding synthetic diamond particles. The hot-pressed PEEK composite reinforced by graphene and diamond particles increased the hardness and thermal stability of the composite. Compared with pure PEEK, composites containing 1% graphene and 1% diamond particles showed an increment of 25% and 23% in hardness and thermal stability, respectively. Fourier-transform infrared spectroscopy and X-ray diffraction analysis verified the compatibility and intactness of the fillers in the PEEK matrix. The tribo properties of PEEK composites were characterized by a pin-on-disc tribometer on a counter steel surface. A PEEK composite containing 0.75 wt% graphene and 0.5 wt% diamond particles exhibited the lowest friction of 0.17 at a pressure of 1.5 MPa. The specific wear rate was low (1.78 × 10−6 mm3/Nm) for the composite containing 1 wt% graphene and 1 wt% diamond particles at a pressure of 1.5 MPa. Varying synthetic diamond and graphene filler concentrations in the PEEK matrix change the wear process by modifying the tribo film characteristics, revealing the lowest friction and wear rate. X-ray photoelectron and Raman spectroscopy show that the polymer film was transferred to the steel countersurface, and the tribo-chemical products of the tribo film contribute to a stable tribo film. The ferric oxide film and the tribo film improve the composite’s self-lubricating properties and load-bearing ability. Hence, the composite containing 0.75% of graphene and 0.5% of a synthetic diamond can be employed in the sliding bearing application of continuous conveyors used in mass production systems.","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":"35 1","pages":"348 - 365"},"PeriodicalIF":2.1,"publicationDate":"2022-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41566515","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: 4

Directional porous polyimide/polyethylene glycol composite aerogel with enhanced CO2 uptake performance 具有增强CO2吸收性能的定向多孔聚酰亚胺/聚乙二醇复合气凝胶

IF 2.1 4区化学

High Performance Polymers Pub Date : 2022-10-26 DOI: 10.1177/09540083221136051

Yihao Nie, Xibin Yi, Xinfu Zhao, Shimo Yu, Jing Zhang, Xiaochan Liu, Sijia Liu, Z. Yuan, Minna Zhang

引用次数: 1

Synthesis and microwave absorption studies on 2D graphitic carbon nitride loaded polyaniline/polyvinyl alcohol nanocomposites 二维石墨氮化碳负载聚苯胺/聚乙烯醇纳米复合材料的合成及微波吸收研究

IF 2.1 4区化学

High Performance Polymers Pub Date : 2022-10-19 DOI: 10.1177/09540083221134955

N. Kavitha, A. Chandramohan, Devansh Sharma, K. Dinakaran

{"title":"Synthesis and microwave absorption studies on 2D graphitic carbon nitride loaded polyaniline/polyvinyl alcohol nanocomposites","authors":"N. Kavitha, A. Chandramohan, Devansh Sharma, K. Dinakaran","doi":"10.1177/09540083221134955","DOIUrl":"https://doi.org/10.1177/09540083221134955","url":null,"abstract":"A light weight electromagnetic interference (EMI) shielding and microwave absorbing composite films has been developed by loading varying weight content of graphitic carbon nitride (g-C3N4) nanosheets and polyaniline (PANI) into polyvinyl alcohol (PVA) matrix. The prepared PVA/PANI/g-C3N4 (1%, 3%, 5%) composites has been subjected to FTIR, X-Ray powder diffraction, SEM, Thermal studies, Dielectric studies and electromagnetic shielding effectiveness (EMI SE) analysis. The PVA/PANI/g-C3N4 (1%, 3%, 5%) composites was discovered to have improved electrical conductivity, dielectric loss, and dielectric constant. It is observed from the SEM images that the sheet layers of g-C3N4 are wrapped by the polymer matrix and the morphology to PVA/PANI composite in the g-C3N4 indicates homogeneous blending of PVA/PANI without any phase separation and has porous in it. The PANI/g-C3N4 fractured surfaces present are smooth but irregular in appearance indicating good compatibility between the PVA and PANI matrices. The dielectric properties was found to increase on increasing the concentration of the g-C3N4 nanofiller and reached a maximum of 9.8 × 106 at 1 MHz for 3% g-C3N4 in PVA/PANI. The incorporation of g-C3N4 into PVA/PANI enhanced the conductivity and the 5% g-C3N4 loaded composite film exhibited a conductivity value of 0.043 S/cm at 1 MHz. The PVA/PANI/g-C3N4 (1%, 3%, 5%) composites exhibited potential EMI SE values ranging from 24 to 35 dB at 8.6 GHz and from 42 to 63 dB at 12.4 GHz, for instance the PVA/PANI/g-C3N4 5% composite showed highest value of 63 dB at 12.4 GHz. The PVA/PANI/g-C3N4 5% exhibits the maximum highest reflection loss 8 GHz–12 GHz in which the higher absorption of −36 dB is observed at 10.3 GHz of the X-band region.","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":"35 1","pages":"324 - 337"},"PeriodicalIF":2.1,"publicationDate":"2022-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43400394","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: 8

Evaluation of augmented thermal, thermo-mechanical, mechanical properties of nano alumina reinforced TGDDM epoxy nanocomposites 纳米氧化铝增强TGDDM环氧树脂纳米复合材料增强热、热机械和力学性能的评价

IF 2.1 4区化学

High Performance Polymers Pub Date : 2022-10-14 DOI: 10.1177/09540083221133986

D. Dhanapal, AnandaKumar Srinivasan, Manjumeena Rajarathinam, Alagar Muthukaruppan

{"title":"Evaluation of augmented thermal, thermo-mechanical, mechanical properties of nano alumina reinforced TGDDM epoxy nanocomposites","authors":"D. Dhanapal, AnandaKumar Srinivasan, Manjumeena Rajarathinam, Alagar Muthukaruppan","doi":"10.1177/09540083221133986","DOIUrl":"https://doi.org/10.1177/09540083221133986","url":null,"abstract":"N,N′-Tetraglycidyldiaminodiphenyl methane (TGDDM) was reinforced with various weight fractions (0.5, 1, and 1.5 wt%) of amine functionalized nano alumina (F-Al) were cured with diaminodiphenyl-methane (DDM). FT-IR analysis revealed that formation of functionalized nano alumina (F-Al) structure, was brought about via coupling agent APTES. Furthermore, the morphology of TGDDM epoxy nanocomposites was studied using X-ray Diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), microscopic analysis and an atomic force microscope (AFM). We found a bonding relationship between TGDDM epoxy and F-Al in TGDDM/F-Al nanocomposites It was interesting to note that the values of tensile, flexural and impact strength of 1 wt% F-Al reinforced TGDDM epoxy nanocomposites were found to be 141.5, 192.5 MPa, and 92.4 J/m2, respectively., which resulted in a substantial improvement in the dynamic mechanical analysis (DMA) to 4.3 and 5.5 for 0.5 and 1 wt% F-Al reinforced TGDDM epoxy nanocomposites and the glass transition temperature (Tg) increased from 210°C to 225°C as the F-Al content increased. The initial degradation temperature (IDT) of 0.5, 1, and 1.5 wt% F-Al reinforced TGDDM epoxy nanocomposites were significantly enriched to 328°C, 345°C, and 335°C respectively from 290°C of neat (TGDDM) epoxy matrix. Likewise, the char yield for the neat (TGDDM) epoxy matrix was 13% and that for 0.5, 1, and 1.5 wt% F-Al reinforced TGDDM epoxy nanocomposites were 17%, 25%, and 20% respectively. It is feasible to state unequivocally that considerable F-Al diffusion within the TGDDM epoxy can only occur at low weight percentages. The results clearly showed that F-Al reinforced TGDDM epoxy nanocomposites may be investigated for advanced high performance industrial engineering applications.","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":"35 1","pages":"313 - 323"},"PeriodicalIF":2.1,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41799273","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

A novel PES-C/(GO-COOH/Ce) blended membrane for treating heavy-metal-ion wastewater 新型PES-C/（GO-COOH/Ce）复合膜处理重金属离子废水

IF 2.1 4区化学

High Performance Polymers Pub Date : 2022-10-12 DOI: 10.1177/09540083221130936

Jie Zhang, Baining Li, Hongdan Xue, Chunyan Zhang, Jinjing Li, Shujing Zhou

{"title":"A novel PES-C/(GO-COOH/Ce) blended membrane for treating heavy-metal-ion wastewater","authors":"Jie Zhang, Baining Li, Hongdan Xue, Chunyan Zhang, Jinjing Li, Shujing Zhou","doi":"10.1177/09540083221130936","DOIUrl":"https://doi.org/10.1177/09540083221130936","url":null,"abstract":"A GO-COOH/Ce complex was introduced into a phenolphthalide polythersulfone (PES-C) matrix to prepare a PES-C/(GO-COOH/Ce) blended membrane by nonsolvent-induced phase transformation (NIPS). FT-IR and EDS analysis confirmed that the GO-COOH/Ce complex was successfully incorporated into the PES-C matrix. SEM showed that the blended membrane possessed an asymmetric structure with finger-like pores. The best comprehensive performance was obtained for a PES-C/(GO-COOH/Ce) blended membrane prepared using 0.1 wt.% of the GO-COOH/Ce complex in the casting liquid. The specific results for the blended membrane were as follows: the fluxes of pure water and 0.1 g/L lead nitrate solution were 272 L/m2·h and 214 L/m2·h, respectively; the rejection of bovine serum albumin (BSA) was 99.4%; the rejection of lead ions was 96.2%; the moisture content was 10.9%; the contact angle was 67.1°; the Young's modulus was 35.7 MPa; and the flux recovery ratio was 1.5 times higher than that of the pure PES-C membrane. The antibacterial-zone diameters of the PES-C/(GO-COOH/Ce) blended membrane used against Escherichia coli and Staphylococcus aureus were 2.50 cm and 2.88 cm, respectively. A catalytic cleaning test showed a flux recovery ratio of 63% after washing the PES-C/(GO-COOH/Ce) blended membrane with a 0.2 g/L acetic acid solution for 0.5 h.","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":"35 1","pages":"295 - 309"},"PeriodicalIF":2.1,"publicationDate":"2022-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44885272","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

An experimental investigation on the tensile properties of PEEK-PEI sandwich structures prepared via fused filament fabrication 熔融长丝法制备PEEK-PEI夹芯结构拉伸性能的实验研究

IF 2.1 4区化学

High Performance Polymers Pub Date : 2022-10-01 DOI: 10.1177/09540083221126623

Zhaogui Wang, Xiuzeng Yin, Lihan Wang

{"title":"An experimental investigation on the tensile properties of PEEK-PEI sandwich structures prepared via fused filament fabrication","authors":"Zhaogui Wang, Xiuzeng Yin, Lihan Wang","doi":"10.1177/09540083221126623","DOIUrl":"https://doi.org/10.1177/09540083221126623","url":null,"abstract":"High-temperature-resistant thermoplastics, e.g., Polyetheretherketone (PEEK) and Polyetherimide (PEI), exhibit much more superior material properties than conventional plastics. They are recently becoming favorable feedstock materials in Fused Filament Fabrication (FFF) 3D printing applications, which yields a low-cost and high-efficient approach providing complex parts and tooling. This paper fabricates the PEEK-PEI combined sandwich structures by properly alternating the fed material during FFF processes, aiming to combine the benefits of both materials. This is considered one of the first few attempts to prepare high-performance thermoplastics-based sandwich samples via the FFF method. The specimens are designed as three-layer and five-layer sandwiches (i.e., each “layer” contain a unique material). In addition, the printed samples are post-processed via a thermal annealing treatment. Experimental results show that the sandwich specimens exhibit higher surface quality than independently printed PEEK materials. The PEI material can be printed in 100% infill density in sandwich structures, while it can be rarely printed independently with infill densities exceeding 40%. Annealing may not enhance the mechanical properties of sandwich specimens while stabilizing their mechanical performances. Under the same PEEK/PEI volumetric ratio (i.e., 1:1), increasing the number of alternating stack layers improves the tensile strength of the sandwich specimens by up to 17%. The sandwich printing method is also cost-effective, such that the five-layer sandwich specimen provides competitive tensile performance as compared to the virgin PEEK material. At the same time, its cost is only ∼60% of all-PEEK specimens.","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":"35 1","pages":"276 - 294"},"PeriodicalIF":2.1,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43412948","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

Research progress on preparation methods of water-soluble polyaniline 水溶性聚苯胺制备方法研究进展

IF 2.1 4区化学

High Performance Polymers Pub Date : 2022-09-30 DOI: 10.1177/09540083221131456

Yuansong Xiao, Yanmin Wang, Xuelian Wu, Yong Ma

引用次数: 1

Synthesis, characterization and post-modification of aromatic (Co)polyesters possessing pendant maleimide groups 含马来酰亚胺基团芳香(Co)聚酯的合成、表征及后改性

IF 2.1 4区化学

High Performance Polymers Pub Date : 2022-09-20 DOI: 10.1177/09540083221127361

Uday A. Jadhav, Samadhan S. Nagane, P. Wadgaonkar

{"title":"Synthesis, characterization and post-modification of aromatic (Co)polyesters possessing pendant maleimide groups","authors":"Uday A. Jadhav, Samadhan S. Nagane, P. Wadgaonkar","doi":"10.1177/09540083221127361","DOIUrl":"https://doi.org/10.1177/09540083221127361","url":null,"abstract":"A new series of (co)polyesters possessing pendent maleimide groups was synthesized by low temperature solution polycondensation of 4, 4’-(5-maleimidopentane-2, 2-diyl) diphenol (BPA-MA) with isophthalic acid chloride (IPC), terephthalic acid chloride (TPC) and a mixture of TPC and IPC (50:50 mol %). Copolyesters were also synthesized by polycondensation of varying compositions of BPA-MA and bisphenol-A (BPA) with IPC. The chemical structures and compositions of (co)polyesters were confirmed by NMR spectroscopy. Inherent viscosity values and number-average molecular weights of (co)polyesters were in the range 0.50–0.76 dL/g and 17,700-32,100 g/mol, respectively, indicating the formation of reasonably high molecular weight polymers. (Co)polyesters were readily soluble in common organic solvents and could be cast into tough, transparent and flexible films from chloroform solutions. (Co)polyesters exhibited 10% weight loss and glass transition temperatures in the range 464–468 and 142–178°C, respectively. A representative copolyester possessing pendant maleimide groups was chemically modified via metal-free azide-maleimide 1,3-dipolar cycloaddition click reaction with two azido compounds, namely, (azidomethyl)benzene (Bz-N3) and 1-(azidomethyl)-pyrene (Py-N3) to yield corresponding modified copolyesters in a quantitative manner.","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":"35 1","pages":"264 - 275"},"PeriodicalIF":2.1,"publicationDate":"2022-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49163640","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