HIGH PERFORMANCE POLYMERS
·
2024
·
IF 1.8
Dengke Li,Han Zhao,Zhiyi Jia,Dianqiu Jia,Jianxin Rong,Huaijie Yan,Xiaoyan Yu,Qingxin Zhang
Composites based on high-performance resin matrix have excellent high temperature resistance, chemical stability, and excellent processability, and exhibit a wide range of applications in many fields. At present, there are no reports on the application of calcium sulfate whiskers (CSW) in phthalonitrile resins. In this study, KH560 was used to modify CSW, through FT-IR, TGA, XRD and XPS methods, KH560 was successfully grafted onto CSW, and the modified CSW was filled with phthalonitrile resin containing fluorine elements. SEM shows that the modified CSW is uniformly dispersed in the resin. The storage modulus of composites increased from 2.6 GPa to 3.8 GPa. Under air and nitrogen atmospheres, the T5% of the composites increased by about 10°C. When the addition amount of CSW is 10%, the friction coefficient of the material is reduced from 0.68 to 0.58, the depth of wear marks decreased from 49.1 μm to 27.9 μm, the wear rate of AFPN-10 (the addition amount of CSW is 10%) decreases from 3.59 × 10−4 mm3/(N·m) to 2.70 × 10−4 mm3/(N·m), the wear resistance performance was significantly improved. With the increase of CSW in composites, the hardness, reduced modulus and elastic recovery rate are also gradually increasing, the highest reduced modulus and hardness are 2434 MPa and 597 MPa respectively. The addition of CSW can improve the mechanical properties and thermal properties of the phthalonitrile resin, as well as enhance its anti-friction ability. Phthalonitrile resin-based composites have potential application values in the fields of aerospace, electronic instruments and lightweight components.
研究领域:
材料科学
·
航空航天
·
化学工程
✓ 已验证
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2015
·Vol. 55
·期 10
·2313-2321
·
IF 1.52
Tao Liu,Yongpeng Wang,Yu Su,Hongyang Yu,Nan Zhao,Yanhua Yang,Zhenhua Jiang
A series of poly(aryl ether ketone) polymers (m-PAEK-CN) containing phthalonitrile were synthesized by a direct solution polycondensation and characterized by Fourier-transform infrared spectroscopy and hydrogen nuclear magnetic resonance. Thermal crosslinking of m-PAEK-CN, catalyzed by p -BAPS, was then performed via heating their films up to 350 o C. Dynamic rheology results showed that the rate of diamine-catalyzed crosslink reaction could be easily controlled by varying the content of cyano groups in the polymer. The uncured synthesized polymers had good solubility, whereas the cured ones became insoluble in common organic solvents. Spectra measurement demonstrated the trimerization reaction of terminal cyano groups to form triazine rings. The resulting cured samples had higher glass transition temperatures, better thermal, and thermo-oxidative stability with high char yield than the uncured ones. Gel content measurements demonstrated that the cured polymers had high crosslinking density with significantly high gel content over 96.0%. Thermal mechanical analysis indicated that the cured phthalonitrile resins possessed excellent thermal mechanical properties and dimensional stability at increased temperatures. The tensile modulus and strength of the cured m-PAEK-CN increased up to 2101–2104 MPa and 96–100 MPa, respectively, which were about 21–23% and 32–56% higher than the uncured ones’. This kind of phthalonitrile resins may be used as a candidate for high-performance polymeric film materials. POLYM. ENG. SCI., 55:2313–2321, 2015. © 2015 Society of Plastics Engineers
研究领域:
高分子科学
·
材料工程
·
聚合物热性能
·
高性能聚合物
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 135
·期 13
·45976
·
IF 1.86
Zuoqiang Wu,Nan Li,Jianhua Han,Chenghao Wang,Kuanyu Yuan,Qiang Zeng,Jinyan Wang,Xigao Jian
High processing viscosity and poor solubility limit the application of heterocyclic polymers for fabricating organic wave-transparent composites for aerospace applications. In this paper, a novel resin, poly(phthalazinone ether bisphenol fluorene) encapped with phthalonitrile (PPEBF-Ph), was synthesized and used as the matrix. Biphenol-based phthalonitrile monomer BP-Ph was also synthesized and blended with PPEBF-Ph to further lower the processing viscosity. Solubility tests showed that the resin was soluble in dimethylformamide, N,N -dimethyl acetamide, N -methylpyrrolidone, dimethyl sulfoxide, chloroform, and other solvents. Differential scanning calorimetry and rheological studies revealed that the mixed resins exhibited low processing viscosity and a wide processing window below the gel temperature. Thermogravimetric analysis indicated that the cured resins were stable below 510–530 °C under nitrogen atmosphere after 6 h of curing (decreased by 40–60% compared with previous reports on phthalonitrile resin). In air, the char yields of the resins reached 20–30% when heated at 800 °C. The composites were reinforced by a quartz fiber cloth and exhibited a dielectric constant of 2.94–3.27 in an electromagnetic field with frequency ranging from 8 to 18 GHz. Retention of the bending modulus exceeded 70% at 400 °C according to dynamic mechanical analysis, indicating excellent mechanical stability was obtained. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45976.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
·
2018
·
IF 1.323
Mehdi Derradji,Abdeldjalil Zegaoui,Yi-Le Xu,An-ran Wang,Abdul Qadeer Dayo,Jun Wang,Wen-bin Liu,Yu-Guang Liu,Karim Khiari
The phthalonitrile resins have claimed the leading place in the field of high performance polymers thanks to their combination of outstanding properties. The present work explores for the first time the gamma rays radiation resistance and shielding efficiency of the phthalonitrile resins and its related tungsten-reinforced nanocomposites. The primary goal of this research is to define the basic behavior of the phthalonitrile resins under highly ionizing gamma rays. The obtained results confirmed that the neat phthalonitrile resins can resist absorbed doses as high as 200 kGy. Meanwhile, the remarkable shielding efficiency of the phthalonitrile polymers was confirmed to be easily improved by preparing lead-free nanocomposites. In fact, the gamma rays screening ratio reached the exceptional value of 42% for the nanocomposites of 50 wt% of nano-tungsten loading. Thus, this study confirms that the remarkable performances of the phthalonitrile resins are not limited to the thermal and mechanical properties and can be extended to the gamma rays radiation and shielding resistances.
研究领域:
材料科学
·
辐射防护
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2015
·Vol. 27
·期 7
·882-888
·
IF 1.757
Mehdi Derradji,Noureddine Ramdani,Lin-dan Gong,Jun Wang,Xiao-dong Xu,Zai-wen Lin,Abdelkhalek Henniche,Wen-bin Liu
In the present work, zinc oxide nanoparticles were treated with aminopropyl trimethoxy silane-coupling agent and used as a new kind of reinforcement for a typical high performance bisphenol-A-based phthalonitrile resin. The resulted nanocomposites were characterized for their mechanical, thermal, and optical properties. Results from the tensile test indicated that the tensile strength and modulus as well as the toughness state of the matrix were all enhanced with the increasing of the nanoparticles amount. Thermogravimetric analysis showed that the starting decomposition temperatures and the residual weight at 800°C were highly improved upon adding the nanofillers. At 6 wt% nanoloading, the glass transition temperature and the storage modulus were considerably enhanced reaching about 359°C and 3.7 GPa, respectively. The optical tests revealed that the neat resin possesses excellent UV-shielding properties, which were further enhanced by adding the nanofillers. Furthermore, the fractured surfaces of the nanocomposites analyzed by scanning electron microscope exhibited homogeneous and rougher surfaces compared with that of the pristine resin. Finally, the good dispersion of the reinforcing phase into the matrix was confirmed by a high resolution transmission electron microscope. Copyright © 2015 John Wiley & Sons, Ltd.
研究领域:
材料科学
·
高分子科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
POLYMER INTERNATIONAL
·
2018
·Vol. 68
·期 4
·724-734
·
IF 2.352
Yang Liu,Zheng-zhou Liu,Wei-feng Peng,Zheng Lu,Jiang-huai Hu,Ke Zeng,Gang Yang
Two novel tetrahydrophthalic anhydride end-capped imide compounds (THAN and THBN) with high thermal stability were synthesized to promote the curing reaction of 1,3-bis(3,4-dicyanophenoxy)benzene (3BOCN), and to study the effects of comonomer structure on the curing behavior and thermal performance of phthalonitrile resins. The curing behaviors of THAN/3BOCN and THBN/3BOCN blends with various molar ratios were investigated using rheological analysis and differential scanning calorimetry, suggesting a wide processing window. Dynamic mechanical analysis and thermogravimetric analysis showed that the cured resins possessed high glass transition temperatures (> 500 °C), and superior thermal and long-term thermo-oxidative stabilities with weight retention of 95% ranging from about 544 to 558 °C in both nitrogen and air. All these results indicated that the processability and thermal properties of phthalonitrile resins could be improved further by modifying the structure of comonomer in this kind of curing system. © 2018 Society of Chemical Industry
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 20
·47505
·
IF 2.188
Yu-Peng Chen,Abdul Qadeer Dayo,Hui-Yan Zhang,An-ran Wang,Jun Wang,Wen-bin Liu,Yan Yang,Qi-Rui Qin,Yu-Gang Yang
The cardanol-based phthalonitrile (PN) monomer was successfully produced via the nucleophilic substitution reaction of cardanol with 4-nitrophthalonitrile in potassium carbonate media. The conventional methods were employed to predict the chemical structure. The influence of long alkyl chains of cardanol was observed on the thermomechanical properties, recorded values were much below than the poly(Baph) standards. However, the thermal stabilities were recorded in good agreement to PN resin values. Furthermore, the 100 kGy dose of Co 60 irradiation does not show any remarkable changes in the studied properties. The copolymers from P-a benzoxazine and cardanol-based PN (CPN) on the different wt % blending were prepared. The curing behavior and mechanism of the monomer blends were analyzed. The curing of CPN was improved in the presence of active hydrogen produced from the P-a polymerization. The T g and thermal properties of the copolymer were much better than the neat poly(P-a). © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47505.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2020
·
IF 4.231
Yuan Zu,Fengfeng Zhang,Dandan Chen,Lishuai Zong,Jinyan Wang,Xigao Jian
Wave-transparent composites with resin matrix are urgently required for the aerospace industry because of lightweight and facile formation. Many thermosetting resins could serve as the matrix of wave-transparent composites, however, some of them are suffering from harsh synthetic conditions, low service temperature (lower than 400 °C), and unstable dielectric properties at high temperature. Herein, branched phthalonitrile resins matrix based on 1,3,5‐tris(4‐fluorobenzoyl)benzene with excellent solubility was prepared by a facile polycondensation procedure. The 5% weight loss temperature of the cured network was as high as 553 °C. Besides, the quartz fiber reinforced composite simultaneously exhibited superior service temperature (over 500 °C) and stable dielectric properties over a broad temperature range from 25 °C to 500 °C. These results would strongly suggest such phthalonitrile resins as excellent wave-transparent composite matrix in those high-tech applications such as aerospace electronics and devices.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2023
·
IF 9.1
Dingxuan Zhao,Jiqiang Hu,Dongqing Wang,Jinchuan Yang,Hanqi Zhang,Bing Wang
High performance composites not only pursue high strength , light weight, but also need to have multifunctional characteristics. To further improve curing efficiency and mechanical properties of phthalonitrile resin (PN75) and give full play to its excellent thermal and dielectric properties , mica as reinforcement was introduced into PN75 to form particle-filled resin (Mica/PN75) and CFRP (Mica/PN75/CF) composites. The introduction of mica reduced the curing temperature of PN75 and improved the curing efficiency. The thermal stability of resin and composites was further improved. The bending strength of the two groups of mica reinforced resin increased by 44.87% and 55.97%, and the dielectric constant decreased from 3.3 to 2.7 and 2.5, respectively. The bending strength of the composites was increased by up to 19.9%, and the glass transition temperature of composites was increased by up to 26 °C after reinforcement. The multidirectional reinforcement of PN75 by mica was studied and analyzed in this work.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
IF 3.7
Xing Yun,Kewen Zhang,Zhaojun Chu,Beitao Liu,Yan Kou,Xigao Jian,Zhihuan Weng
Heteroatom-doped porous carbon materials have been widely studied due to their high specific surface area and high heteroatom content, but it is difficult to achieve high specific surface area and high heteroatom content at the same time. Herein, a simple method is introduced to prepare N/O co-doped hierarchical porous carbon materials (DNZKs). Phthalonitrile resins (DNZs) were prepared by using 1,3- bis (3,4-dicyanophenoxy)benzene as raw material and ZnCl 2 /urea as composite curing agent, and then using KOH as activator to successfully prepare DNZKs with high specific surface area, developed pores and high N/O content. The porous carbon material (DNZK@400) obtained at a curing temperature of 400 °C has the highest N content (4.97% (mass)), a large specific surface area (2026 m 2 ·g –1 ), a high micropore proportion (0.9), a high O content (7.53% (mass)), and the best specific capacitance (up to 567 F·g –1 at 0.1 A·g –1 ), which can be attribute to the high temperature resistance of the nitrogen-containing aromatic heterocyclic structure in DNZs. When the mass ratio of resin and KOH is 1:1, the specific capacitance of the sample tested by the acid three-electrode system is obtained, and it is found that the material has high cycling stability (119% specific capacitance retention after 100,000 cycle tests). This work proposes a simple and easy-to-operate method for the preparation of multifunctional porous carbon.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
HIGH PERFORMANCE POLYMERS
·
2023
·
IF 2.1
Slimane Abdous,Mehdi Derradji,Oussama Mehelli,Karim Khiari,Mohamed Elamine Kadi,Abdelmalek Habes,Noureddine Ramdani,Abdeljalil Zegaoui,Wenbin Liu
The design of lightweight neutron shields has been restricted for quite some time to the use of epoxy thermosets as the main building blocks. Meanwhile, the recent developments in the field of polymers suggest otherwise. Indeed, the phthalonitrile (PN) resins have taken the lead over traditional thermosets in many demanding applications. Therefore, in a vision to introduce newer matrices with better performances and to further expand the applications of the PN resins into the nuclear field, the neutron shielding efficiency along with the thermal resistance performances of the neat PN polymer and its subsequent silane surface-modified B4C-reinforced composites were investigated. The neutron shielding measurements were performed using an optimized experimental setup at the NUR research reactor in Algiers. The neat PN polymer displayed better thermal neutron screening performances than the epoxy and benzoxazine, with a macroscopic cross-section (Σ) of a 1.936 cm−1, equivalent to a mean free path (λ) of 0.358 cm. The effect of the particle amount was also studied to maximize the shielding ability of the developed materials. For instance, the PN composite containing 20 wt. % of B4C displayed an outstanding screening ratio of about 99.8% for a sample thickness of 13 mm. Finally, the remarkable findings were put into context by providing multifaceted comparisons with the available shielding materials.
研究领域:
材料科学
·
核工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2026
·
IF 4.9
Abdelwahed Berrouane,Mehdi Derradji,Karim Khiari,Wenbin Liu,Qiufei Chen,Mounia Ticherfatine
This study presents three partially bio-based benzoxazine-containing phthalonitrile monomers (EU-BZ-PN, GU-BZ-PN and 3MP-BZ-PN), synthesised via a facile solvent-less melt condensation method using eugenol, guaiacol and meta-methoxyphenol with 4-aminophenoxy phthalonitrile and paraformaldehyde. The chemical structures of the hybrids were validated by FTIR and 1 H NMR analyses. Their curing involves a sequential two-step self-promoted process: ring-opening polymerization of the oxazine groups followed by ring-forming cyclotrimerisation of the phthalonitrile units, yielding polybenzoxazine and N-heteroaromatic networks, respectively. Non-isothermal DSC combined with peak deconvolution and Starink isoconversional analysis reveals that the monophenolic backbone governs the curing kinetics, with apparent activation energies for the two stages spanning roughly 80–130 kJ mol − 1 ; the meta-methoxy 3MP-BZ-PN displays the lowest activation barriers and the lowest onset and peak curing temperatures. In-situ FTIR tracking of the benzoxazine (948 cm − 1 ) and nitrile (2228 cm − 1 ) bands corroborates the sequential mechanism and confirms the higher reactivity of 3MP-BZ-PN. After curing, all hybrids exhibit outstanding thermal robustness ( T 10% > 460 ∘ C, char yield up to 71.6 wt% at 800 ∘ C) and high glass-transition temperatures ( T g between 325 and 373 ∘ C). DMA, flexural testing and SEM demonstrate a tunable balance between stiffness, T g and fracture toughness via simple backbone engineering, making these bio-based BZ–PN hybrids promising high-performance thermosetting matrices for advanced structural and extreme-environment composite applications.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）