High Performance Polymers最新文献_第3页

Preparation and characterization of highly heat-resistant, soluble, and hydrophobic fluorinated polyimides with gas transport properties 制备和表征具有气体传输特性的高耐热性、可溶性和疏水性氟化聚酰亚胺

IF 2.1 4区化学

High Performance Polymers Pub Date : 2024-03-06 DOI: 10.1177/09540083241237751

Yufei Shi, Jinling Li, Weilian Wu, Jing Ni, Bowen Wei, Chanjuan Liu, Xiaohua Huang

{"title":"Preparation and characterization of highly heat-resistant, soluble, and hydrophobic fluorinated polyimides with gas transport properties","authors":"Yufei Shi, Jinling Li, Weilian Wu, Jing Ni, Bowen Wei, Chanjuan Liu, Xiaohua Huang","doi":"10.1177/09540083241237751","DOIUrl":"https://doi.org/10.1177/09540083241237751","url":null,"abstract":"A series of fluorinated co-polyimide films based on the 6FDA-FTPPA/BAFL backbone were prepared from 4-(3-fluoro-4-(trifluoromethyl)phenyl)-2,6-bis(4-aminophenyl)pyridine (FTPPA),commercial 9,9-bis(4-aminophenyl)fluorene (BAFL), and 4,4’-(hexafluoroisopropylidene)diphthalic anhydride (6FDA), with varying ratios of FTPPA:BAFL units (3:1, 2:1, 1:1, 1:2, and 1:3). Co-polyimides not only exhibit high thermal stability ( Tg > 357°C), good optical properties (λcutoff > 327 nm) and hydrophobicity (contact angle >91.4°), but also favorable solubility properties in both high and low boiling organic solvents. The fractional free volume of the polymers was simulated using molecular mechanics and molecular dynamics and correlated with experimental gas separation data. The presence of bulky groups led to high FFVs (>17.8%) and the formation of large microcavities with diameters ranging from 5.48 to 5.72 Å, which efficiently increased gas permeability. In pure gas permeation experiments, the permeability coefficients of CO2 and He for the 6FDA-FTPPA/BAFL (3:1) film were 41.48 and 79.38 bar, respectively, which were superior to those of commercial Matrimid and Kapton in terms of gas permeability. In especial, the 6FDA-FTPPA/BAFL (1:2) and 6FDA-FTPPA/BAFL (1:3) in co-polyimide membranes exhibited the most attractive separation performance for O2/N2 gas pairs, approaching the 1991 Roberson upper limit.","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140056813","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

Preparation and properties of high-temperature resistant bisphthalonitrile resins containing trifluoromethyl groups reinforced by poly (aryl ether nitrile) capped by phthalonitrile and composites 用邻苯二腈封端的聚（芳基醚腈）增强的含三氟甲基的耐高温双邻苯二腈树脂及其复合材料的制备与性能

IF 2.1 4区化学

High Performance Polymers Pub Date : 2024-01-31 DOI: 10.1177/09540083241229209

Xuhai Xiong, Lei Yao, Rong Ren, Donghui Liu, Na Li

{"title":"Preparation and properties of high-temperature resistant bisphthalonitrile resins containing trifluoromethyl groups reinforced by poly (aryl ether nitrile) capped by phthalonitrile and composites","authors":"Xuhai Xiong, Lei Yao, Rong Ren, Donghui Liu, Na Li","doi":"10.1177/09540083241229209","DOIUrl":"https://doi.org/10.1177/09540083241229209","url":null,"abstract":"A new series of high-temperature resistant bisphthalonitrile resins containing trifluoromethyl groups were prepared based on 4,4’-(hexafluoroisopropylidene) bisphthalonitrile (BFPh), which was toughened by hexafluoroisopropylidene-containing poly (aryl ether nitrile) oligomer capped by phthalonitrile (FPEN-Ph) in the different content. In addition, glass fiber reinforced composites were prepared by hot pressing process. The structure of the oligomer was characterized by FTIR and 1HNMR. The curing behavior of the blends was studied by DSC. Thermal stability and mechanical properties were also studied. The results showed that the introduction of appropriate content of FPEN-Ph could improve the reactivity of the curing reaction. TGA and DMA results showed that the cured polymers and composites had excellent thermal properties. The residual mass of FPEN-Ph content of 10% at 800°C was 72.4%, and the 5% thermal degradation temperature (T5%) under inert atmosphere was 530°C. The flexural strength of glass fiber reinforced composites was about 592.7 MPa, and the shear strength was about 61.6 MPa, showing excellent mechanical properties. The high-tech thermosetting resin was toughened and enhanced at the same time without reducing heat resistance.","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139949557","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

Preparation and mechanical properties of Ni/RGO reinforced epoxy resin composites Ni/RGO 增强环氧树脂复合材料的制备与力学性能

IF 2.1 4区化学

High Performance Polymers Pub Date : 2024-01-03 DOI: 10.1177/09540083231225284

Xinjia Yang, Keru Song, Dongyu Zhao

引用次数: 0

Preparation of high temperature resistant polycarbonate via ionic liquid activation of bisphenol fluorene under mild conditions 在温和条件下通过离子液体活化双酚芴制备耐高温聚碳酸酯

IF 2.1 4区化学

High Performance Polymers Pub Date : 2023-12-30 DOI: 10.1177/09540083231225290

Huanhuan Gao, Xiaozhou Zhang, X. Jian, Jinyan Wang

引用次数: 0

Viscoelastic behaviour of poly(ether-ketone)/fly ash composites fabricated by powder metallurgical route 粉末冶金法制造的聚（醚酮）/粉煤灰复合材料的粘弹性行为

IF 2.1 4区化学

High Performance Polymers Pub Date : 2023-12-28 DOI: 10.1177/09540083231224608

Mukesh Kumar, R. Goyal, S. Sharma

引用次数: 0

Preparation and dielectric properties of polyimide-based composites with Al-Nb co-doped SiO2 Al-Nb 共掺杂 SiO2 的聚酰亚胺基复合材料的制备与介电特性

IF 2.1 4区化学

High Performance Polymers Pub Date : 2023-12-23 DOI: 10.1177/09540083231224158

Wenchao Zhang, Qiang Fu, Qixin Yuan, Han Li, Dong Yue, Yu Feng, Qingguo Chen, Jinghua Yin

{"title":"Preparation and dielectric properties of polyimide-based composites with Al-Nb co-doped SiO2","authors":"Wenchao Zhang, Qiang Fu, Qixin Yuan, Han Li, Dong Yue, Yu Feng, Qingguo Chen, Jinghua Yin","doi":"10.1177/09540083231224158","DOIUrl":"https://doi.org/10.1177/09540083231224158","url":null,"abstract":"Polyimide (PI) film have been synthesized and used extensively in energy transmission, wind power generation, new energy vehicles, lidar, and high-power weapons, et al. Nevertheless, it is still challenge to further improve the breakdown strength and dielectric constant of PI film. After the powders of Al0.5xNb0.5xSi1-xO2 (NASO (x mol%)) have been fabricated, it was analyzed that the effect of doping elements Al3+ and Nb5+ on the surface chemistry and microstructure of the NASO powder. And then a small amount of NASO powder was polymerized in situ with PI matrix material, and the effects of NASO on dielectric properties and breakdown strength of the NASO/PI composites were analyzed. The results showed that the introduction of the doping elements Al3+ and Nb5+ favors could be conductive to the formation of oxygen vacancies on the surface of the NASO particle, which improved the surface activity and chemical reactivity of the NASO particle. The PI matrix can efficiently capture additional charges and enhance the insulating characteristics of the NASO/PI composite by properly doping NASO fillers with specific defect concentrations. In the results the breakdown strength of 1 vol% NASO (1 mol%)/PI composites reaches 334.38 kV/mm, which is a 19.6% higher than that of PI. Because the traps in the fillers capture and suppress the carrier transport to enhance the insulating properties of the composites. This work offers a novel synthesis method to simultaneously produce polymer dielectrics with high insulation and high polarization.","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139162135","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

Influence of monomer concentration on structures of fully condensed polyphenylsilsesquioxanes 单体浓度对完全缩合聚苯基硅倍半氧烷结构的影响

IF 2.1 4区化学

High Performance Polymers Pub Date : 2023-12-18 DOI: 10.1177/09540083231222593

Xiaolu Wu, Zhaolu Qin, Wenchao Zhang, Rongjie Yang

{"title":"Influence of monomer concentration on structures of fully condensed polyphenylsilsesquioxanes","authors":"Xiaolu Wu, Zhaolu Qin, Wenchao Zhang, Rongjie Yang","doi":"10.1177/09540083231222593","DOIUrl":"https://doi.org/10.1177/09540083231222593","url":null,"abstract":"Fully condensed polyphenylsilsesquioxanes have been prepared via the hydrolysis and condensation of the same phenyltrimethoxysilane (PTMS) monomer in different concentrations. The effect of monomer concentration on molecular structure of the final products has been thoroughly investigated. Cage structured polyphenylsilsesquioxane (OPS) and ladder-like structured polyphenylsilsesquioxane (L-PPSQ) can be selectively synthesized from the same starting materials at lower and higher initial monomer concentrations. Meanwhile, online infrared detector, React IR TM15 was used to monitor the real time variation of the concentration and characteristic absorption peaks of any intermediate products that may exist. Then, React IR TM15 coupled with 29Si nuclear magnetic resonance spectroscopy (NMR), gel permeation chromatography (GPC) and matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF-MS) were used to monitor and identify the intermediate species during the reaction. Mechanism studies indicated that the condensation reaction of OPS and L-PPSQ both proceed through a T1 structure dimer, which was formed by the quick hydrolysis of the PTMS monomer. As confirmed by 29Si-NMR, GPC and MALDI-TOF-MS, the synthesis mechanisms of OPS and L-PPSQ during the hydrolysis-condensation reactions were delineated.","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138963720","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

Fabrication of high performance polyimide fibers by dry-jet wet spinning technology 利用干喷湿纺技术制造高性能聚酰亚胺纤维

IF 2.1 4区化学

High Performance Polymers Pub Date : 2023-12-14 DOI: 10.1177/09540083231221248

Xiaowei Wang, Mengying Zhang, Hongqing Niu, Dezhen Wu

{"title":"Fabrication of high performance polyimide fibers by dry-jet wet spinning technology","authors":"Xiaowei Wang, Mengying Zhang, Hongqing Niu, Dezhen Wu","doi":"10.1177/09540083231221248","DOIUrl":"https://doi.org/10.1177/09540083231221248","url":null,"abstract":"High-performance co-polyimide (co-PI) fibers derived from 3,3`4,4`-biphenyldianhydride (BPDA), p-phenylenediamine (p-PDA) and 2-(4-aminophenyl)-5-amino-benzimidazole (BIA) were prepared via the wet spinning and dry-jet wet spinning method, respectively. The distinctions between wet spinning and dry-jet wet spinning processes on the structures and properties of co-PI fibers were systematically investigated. The co-PI fibers prepared by dry-jet wet spinning exhibited smoother surface morphology and higher mechanical properties than those of co-PI prepared by wet spinning. Wide-angle X-ray diffraction (WAXD) results showed that the co-PI fibers prepared by dry-jet wet spinning exhibited highly oriented structure along the fiber direction along with a low degree of lateral packing order in the transverse direction. Small-angle X-ray scattering (SAXS) revealed that the radius, length, misorientation and internal surface roughness of the microvoids in the co-PI fibers prepared by the dry-jet wet spinning are lower than those in co-PI fibers prepared by wet spinning. Moreover, the effect of air layer height, as well as the heat treatment on the structure and properties of fibers during the dry-jet wet spinning process, was also studied. The tensile strength and modulus of co-PI fibers prepared by dry-jet wet spinning reached 2.72 GPa and 114.29 GPa, respectively, with an air layer height of 10 mm and a heat stretching temperature of 440°C.","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139002795","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

Fabrication and characterization of modified POD membranes with ultra-high tensile strength through hydrogen bonding functioning and copolymerization 通过氢键功能和共聚作用制造具有超高拉伸强度的改性 POD 膜并确定其特性

IF 2.1 4区化学

High Performance Polymers Pub Date : 2023-12-02 DOI: 10.1177/09540083231219780

Mengxiang Huang, Lihong Li, Wen-Guang Xie, Ni Yan, Limin Yuan, Zhiqiang Zhu, Zhenlin Jiang

{"title":"Fabrication and characterization of modified POD membranes with ultra-high tensile strength through hydrogen bonding functioning and copolymerization","authors":"Mengxiang Huang, Lihong Li, Wen-Guang Xie, Ni Yan, Limin Yuan, Zhiqiang Zhu, Zhenlin Jiang","doi":"10.1177/09540083231219780","DOIUrl":"https://doi.org/10.1177/09540083231219780","url":null,"abstract":"A series of modified aromatic oxadiazole polymers were synthesized via condensation reactions of terephthalic dihydrazide (TPH) and varying amounts of Trimesic acid (H3BTC) in polyphosphoric acid (PPA). Pentaerythritol was introduced to construct intermolecular hydrogen bonds among polymeric chains, resulting in a three-dimensional network structure, and correlations between H-bonds and mechanic properties are discussed. Structures and mechanic properties of the polymers were characterized and analyzed. By investigation of molecular structure and membrane formation process of chemically modified and hydrogen bond-regulated polymer membranes, it was found that the modified polymer membranes retain the unique thermal stability, chemical stability, and good hydrophobicity of the POD rigid polymer. Additionally, hydrogen bonds not only significantly improve the overall quality of the membrane, but also play an important role in enhancing the mechanical properties of the membrane, as demonstrated in the highest observed of up to a maximum of 167.19 MPa. Furthermore, impact of H3BCT modification on light absorption and fluorescence performance of T-PODx is also analyzed and discussed in this paper.","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138606691","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

Synthesis and characterization of low retardation colorless polyimides containing m-phenylenediamine with different pendant groups 含不同悬垂基团间苯二胺的低缓凝无色聚酰亚胺的合成与表征

4区化学

High Performance Polymers Pub Date : 2023-11-01 DOI: 10.1177/09540083231208019

Xiaohong Li, Nafeesa Mushtaq, Jinglei Xing, Guofei Chen, Xingzhong Fang

{"title":"Synthesis and characterization of low retardation colorless polyimides containing <i>m</i>-phenylenediamine with different pendant groups","authors":"Xiaohong Li, Nafeesa Mushtaq, Jinglei Xing, Guofei Chen, Xingzhong Fang","doi":"10.1177/09540083231208019","DOIUrl":"https://doi.org/10.1177/09540083231208019","url":null,"abstract":"In this study, 4-biphenyl-3,5-diaminobenzoate (E- m-PDA) was synthesized by three steps using 3,5-dinitrobenzoic acid as a starting material. Two series of colorless polyimides (CPIs) PI-(1a-1d) and PI-(2a-2d) were prepared by traditional two-step polycondensation of m-phenylenediamine ( m-PDA) based diamines with different pendant groups (-H, CF 3 , COOH and biphenyl ester) with aromatic dianhydrides BPADA and 6FDA, respectively. All of the prepared CPIs exhibited high thermal stability with 5% weight loss at temperatures ranging from 428 to 539°C in nitrogen, and glass transition temperatures ( T g s) ranging from 228 to 332°C. These PI films displayed a UV-vis absorption cut-off wavelength at 338–376 nm and transparency of 76%–89% at a wavelength of 450 nm. Both series of colorless PI films also showed low birefringence values of 0.0021–0.0100. In addition, the optical retardations of these CPIs were extremely low (48–220 nm), indicating low optical anisotropy of these CPI films. Colorless PI film PI-2d prepared based on E- m-PDA and 6FDA had good comprehensive properties of low birefringence ([Formula: see text] n of 0.0064), high T g (319°C) and excellent transparency ( T 450 of 88%).","PeriodicalId":12932,"journal":{"name":"High Performance Polymers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135272892","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