Polymers
·
2022
·Vol. 14
·期 19
·4234
·
IF 4.967
Lida Yu,Yang Yu,Jiahao Shi,Xiaorui Zhang,Feng Gao,Chenhao Li,Zhou Yang,Jingui Zhao
Bismaleimide (BMI) resin has great potential in aerospace, electronic, and machinery fields due to its extraordinary thermal stability. Owing to BMI’s lower impact strength, various modified BMI resins have been prepared using CTBN, PEEK, fillers, and hyperbranched polymer to achieve higher impact strength. However, enhancement of toughness causes deterioration of other performance, such as Tg, thermal stability, and brittleness. In this work, BMI resin modified by hyperbranched polyimide (HBPI) was obtained. HBPI designed with flexible segments, unsaturated bonds, and a low degree of branching was synthesized. FT-IR and13C-NMR were applied to confirm the successful fabrication of HBPI. The mechanical strength and dielectric properties of cured BMI resin containing various levels of HBPI were analyzed systematically. The impact and bending strength were improved significantly with increased HBPI content. When the content of HBPI is 40 wt.%, the impact strength and bending strength reach the maximum value of 32 kJ/mm and 88 MPa. In addition, the BMI cured with HBPI exhibits enhanced bending modulus to the value of 5.9 GPa. Furthermore, the dielectric strength of cured resin was improved to 28.3 kV/mm. The improved mechanical strength and enhanced dielectric properties are attributed to the increasing free volume induced by HBPI. These results indicate the promise of BMI resin modified by HBPI applied in insulating coatings and low dielectric laminates used in high frequency.Keywords:hyperbranched polyimide;mechanical strength;impact strength;bending modulus;dielectric properties;glass transition temperature
研究领域:
材料科学
·
聚合物化学
·
航空航天工程
·
电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Runze Liu,Jianjian Jiao,Yuhang Wang,Jiazi Zhang,Linyan Zhu,Yuming Lu,Jinyan Wang,Lishuai Zong,Jianhua Han,Xigao Jian
To address the escalating demands imposed by artificial intelligence computations, advanced electronic packaging technologies have increasingly emphasized miniaturization, high integration, and superior stability. Nonetheless, such advancements frequently encounter challenges such as severe heat accumulation, inadequate rigidity, and electrical signal interference. Consequently, there is an urgent need for packaging materials that possess exceptional thermal resistance, elevated flexural modulus, and superior dielectric attributes to satisfy these stringent application criteria. Initiated from a molecular design perspective, this investigation successfully synthesized bismaleimide (BMI)-terminated poly(phthalazinone ether nitrile ketone) (PPENKBMI) and used a biphenyl-structured curing agent, namely, 3,3′-diallylbiphenyldiol (DABP). These were subsequently compounded with 4,4′-bismaleimidodiphenylmethane (BDM) in various proportions to produce a composite matrix. Evaluation results indicate that, due to the pronounced rigidity of the biphenyl structure coupled with the spatial complexity imparted by the naphthalene-containing biphenyl framework, the resultant composites demonstrate outstanding thermal resilience (with Tg exceeding 300 °C), achieve a flexural modulus of 52.3 GPa, and attain a flexural strength of 660.4 MPa. Moreover, the robust skeletal architecture facilitates augmented free volume, leading to a diminished dielectric constant (measured at 4.2 at 10 GHz) relative to conventional BMI resin resins. Furthermore, the composites exhibit commendable performances in terms of processability, thermal durability, peel strength and control over the coefficient of thermal expansion. Collectively, this resin composite showcases exceptional overall properties and holds substantial promise for state-of-the-art electronic packaging applications.
研究领域:
材料科学
·
高分子科学
·
电子工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER COMPOSITES
·
2018
·Vol. 40
·期 6
·2346-2356
·
IF 1.943
Zhujun Wang,Qian Li,Zheming Chen,Huayi Li,Shuirong Zheng,Xiaobin Tang
Functionalization of boron nitride nanosheets (BNNSs) has always been a challenge due to its chemical inertness and anti-oxidative properties. In a concentrated base environment, the B-N bonds on the surface of BNNSs were broken to produce a large number of B-OH and N-H functional groups. Afterwards, aniline carbocation produced by decomposition of the diazonium salt was utilized to achieve high grafting content of Ph-NH 2 groups onto the surface of BNNSs. Further, the amide reaction between amino and stearyl chloride verified the reactivity of Ph-NH 2 groups on the surface of BNNSs, with the result that BNNSs were abundantly decorated by aliphatic chains at 22.9 wt% grafting yield. The surface aliphatic chains of BNNSs strongly improved the interfacial adhesion between the High-density polyethylene (HDPE) matrix and the filler and provided an excellent dispersion of SC-BNNSs in the HDPE matrix. Therefore, HDPE/SC-BNNSs nanocomposites showed improved thermal stability, thermal conductivity, neutron shielding property and flexural modulus with no apparent reduction in tensile strength. When filler content exceeded 5 wt%, the HDPE/SC-BNNSs nanocomposites showed a higher thermal decomposition temperature than the composites with pristine BNNSs fillers. POLYM. COMPOS., 40:2346–2356, 2019. © 2018 Society of Plastics Engineers
研究领域:
材料科学
·
聚合物化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
HIGH PERFORMANCE POLYMERS
·
2023
·
IF 2.1
Weihao Yin,Xiaoming Sang,Jinghui Dong,Zhen Chen,Xinggang Chen
To improve the processability of biphenyl phthalonitrile resin, a flexible siloxane structure was introduced into the phthalonitrile monomer through molecular design, which was then blended with a biphenyl monomer to prepare phthalonitrile alloy resins. When the ratio of phthalonitrile monomer containing flexible siloxane to biphenyl phthalonitrile monomer was 1:1, the processing window widened from 58 to 110°C, as compared to that of biphenyl phthalonitrile. Due to the introduction of the biphenyl structure into the phthalonitrile alloy resins, the initial decomposition temperature of the silicon-containing phthalonitrile resin increased from 385 to 516°C. More importantly, the phthalonitrile alloy resin exhibited a high bending strength (66 MPa) and bending modulus (3762 MPa), indicating that it could be potentially applied as high temperature structural composite matrices. Furthermore, it provides a new strategy for processing phthalonitrile resins with a high melting point and narrow processing window.
研究领域:
材料科学
·
高分子化学
·
复合材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Junliang He,Ji Zhou,Jizhen Tian,Shuai Li,Yunfei Gao,Zhengguang Heng,Yang Chen,Huawei Zou,Mei Liang
Data-driven methods or computational techniques have opened new paradigms for the rational design of materials. The introduction of specific groups could largely enhance anti-flammable and mechanical properties for epoxy resins. In this work, two high-performance epoxy resins (mABAEP and SAAEP) containing assisted flame-retardant “genes” were designed adopting a material genome approach combined with DFT calculations and synthesized through a one-pot method. The resin can be automatically molded in the presence of a heat source without mixing with hardener, called “self-curing”, which considerably increases the density of assisted flame-retardant “genes”. The presence of such “genes” in epoxy resin could promote char layer formation and release nonflammable gases during combustion, further improving flame retardancy. On the other hand, those “genes” with strong polarity enhance intermolecular forces thus reducing the motility of chain segments. The bending test shows that SAASC (SAAEP after self-curing) has higher flexural modulus and flexural strength (5155 MPa, 125.7 MPa) compared to E51/DDM (2564 MPa, 103.7 MPa), with 101% and 21% improvement respectively. In addition, SAASC has a higher glass transition temperature (217 °C) and char yield (45.0%), as well as superior antibacterial properties, which can satisfy multifunctional applications.
研究领域:
材料科学
·
化学工程
·
计算化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 36
·2103989
·
IF 18.808
Xiao Wang,Yuanyuan Zhang,Yun Zhao,Guang Li,Jianhua Yan,Jianyong Yu,Bin Ding
Inorganic materials assembled with rigid elements such as crystals or graphitized carbon generally show brittleness and hardness. However, it is found that both TiO 2 ceramic crystal nanofibers (NFs) and carbon NFs show superior flexibility, in which the former are surprisingly knottable and the latter exhibit excellent bending-resilience property. The different flexure mechanisms are revealed by fabricating composite NFs of these two constituents and find that the carbon NFs can be recovered to the original states after releasing the external force, while the bending-resilience is weakened and the softness of the composite NFs is enhanced upon increasing the TiO 2 content. The graphitized carbon can store mechanical deformation energy that enables the NFs with bending-resilience, while both the homogeneous interfaces between TiO 2 crystals and the heterogeneous interfaces between TiO 2 and carbon can alleviate stress concentration, which reduce the flexural modulus of the composite NFs. By filling different contents of elastic carbon into TiO 2 NFs, a series of flexible NFs that exhibit gradient bending-resilience properties are fabricated. This study provides a deeper understanding of the mechanical properties of inorganic materials.
研究领域:
材料科学
·
纳米技术
·
陶瓷学
·
材料力学性能
✓ 已验证
DOI
高影响因子
POLYMER BULLETIN
·
2016
·Vol. 74
·期 5
·1611-1627
·
IF 1.371
Song Laifu,Lu Shaorong,Xiao Xiane,Qi Bo,He Zihai,Xu Xu,Rao Baolin,Yu Jinhong
Epoxy composites with biphenyl liquid crystalline polyester (BLCP)-grafted graphene oxides (GO) as inclusions were prepared successfully. The thermal and texture analyses of BLCP were characterized by DSC and POM. The results show that the texture structure of BLCP turned into fan texture from woven texture with increasing temperature and present double texture structure. More importantly, the thermal and mechanical properties of epoxy composites could be improved by incorporating BLCP-grafted GO (BLCP-GO). The epoxy composite with only 0.5 wt% BLCP-GO produced an increase in the initial decomposition temperature ( T
d ) by 28 °C and glass transition temperature ( T
g ) by 17.2 °C when compared with the neat epoxy. Moreover, for the mechanical properties tests, the composites with 1.0 wt% BLCP-GO exhibit an increase in impact strength, tensile strength, flexural strength and flexural modulus by 103, 52, 66, and 56 %, respectively, compared with the neat epoxy resin. These excellent performances of the graphene–epoxy composites have a great potential for applications in aerospace and other electrical devices.
研究领域:
材料科学
·
复合材料
·
热工程
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Yu Qi,Zhihuan Weng,Yan Kou,Lequn Song,Jiahui Li,Jinyan Wang,Shouhai Zhang,Cheng Liu,Xigao Jian
Developing bio-based epoxy resins with high thermal stability and mechanical properties as well as satisfactory intrinsic flame retardancy is of increasing demand, though this has always been limited by the lack of bio-based polyaromatic building blocks. Herein, a simple and universal method was proposed to synthesize an aromatic s-triazine derivative from biomass feedstock, vanillin, and the obtained compound can be employed to construct a bio-based epoxy precursor (THMT-EP). With 4,4′-diaminodiphenyl sulfone (DDS) as curing agent, thanks to the unique structures of aromatic s-triazine, the resulting cured THMT-EP/DDS presented remarkable integrated properties outperforming than commercial petroleum-based bisphenol A epoxy resin (DGEBA), including a record glass transition temperature of 300 °C, as well as a high flexural modulus of 4137 MPa and a flexural strength of 134.2 MPa, which were 120 °C, 53.9% and 14.3% higher than those of DGEBA/DDS, respectively. Furthermore, the cured THMT-EP/DDS also showed excellent intrinsic flame retardancy, passing the V-0 rating in UL-94 test. This study opens an avenue for the synthesis of bio-based feedstocks with rigid aromatic and functional structure, and contributes to the development of bio-based high-performance polymers.
研究领域:
材料科学
·
聚合物化学
·
可持续材料
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Zhixiong Wen,Jiaming Zhong,Congze Pang,Jianqiao Hu,Hengxu Song,Wei Huang
Structural materials serving in extreme environments, such as offshore and desert, face persistent threats from impact damage and corrosion. While polyurethane (PU) coatings are widely used for protection (e.g., on wind turbine blades), their effectiveness is often limited by insufficient hardness, impact resistance, and long-term corrosion performance. Inspired by the damage-tolerant architectures of natural sponge and nacre, a bioinspired lamellar coating via alternating spray deposition and UV curing of rigid alumina/PU nanocomposite layers and soft polyurethane acrylate layers is developed. This approach enables conformal, large-area application on complex geometries while featuring rapid preparation and overcoming scalability barriers. Compared to conventional PU coatings, the bioinspired film exhibits a 137% increase in flexural modulus, a 119% enhancement in penetration energy absorption, and a 17% reduction in penetration displacement under dynamic impact. Crucially, it maintains robust corrosion resistance post-impact—microcracks are contained within individual layers, preventing catastrophic failure and electrolyte ingress, much like nacre's protective function in marine settings. Multiscale characterization and finite element analysis confirm that coordinated crack deflection and microcrack networks synergistically mitigate impact stress and preserve electrochemical barrier integrity. This spray-based, UV-cured platform offers a scalable route to multifunctional bioinspired coatings for demanding engineering applications.
研究领域:
材料科学
·
涂层与表面工程
·
仿生学
·
机械工程
·
腐蚀科学
·
纳米复合材料
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2024
·
IF 6.7
Pei-Xiu Tian,Yi-Dong Li,Zhi Hu,Jian-Bing Zeng
For recyclable carbon fiber-reinforced composites (CFRC), epoxy vitrimers are frequently utilized as matrix. However, there are a number of limitations on these vitrimer matrices, including a relatively low glass transition temperature ( T g ), insufficient strength, and flammability. Creating epoxy vitrimers with improved strength, high T g , and fire-safe properties are the aim of this work. For usage in recyclable and fire-safe CFRC, the vitrimer was created specifically. By curing bisphenol-A diglycidyl ether with a vanillin-derived imine hardener, and incorporating 10-(2,5-dihydroxyphenyl)-10-hydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO-HQ) for reactive flame-retardant, we achieved high-performance epoxy vitrimers with impressive tensile strength (>80 MPa), T g (≥135 °C), and flame retardancy as well as excellent reprocessability. The vitrimer, EVHQ2.0 (22 wt% DOPO-HQ), showed excellent flame retardancy (LOI: 32.5%, V-0 rating in UL-94). Using EVHQ2.0 as the matrix, we obtained CFRC, with remarkable mechanical performance (flexural strength: 480.4 MPa, flexural modulus: 31.7 GPa). Moreover, the CFRC demonstrated a high level of fire safety, achieving a V-0 rating and possessing a LOI value of 35.5%. Additionally, we also realized non-destructive recovery for valuable carbon cloth through chemically decomposing the vitrimer network using additional diamines. What's particularly noteworthy is that by reassembling the deteriorated vitrimer with reclaimed carbon fiber, the composite can be completely recycled. A carbon fiber reinforced composite with mechanical characteristics similar to the primary composite is created by this method. This research breakthrough holds significant implications for the development of recyclable composites with fire-resistant properties and improved mechanical performance.
研究领域:
材料科学
·
复合材料
·
回收
·
防火安全
✓ 已验证
DOI
高影响因子
POLYMER TESTING
·
2020
·
IF 3.275
Weiqi Xie,Donglin Tang,Shumei Liu,Jianqing Zhao
The development of high-performance biomass-derived epoxy thermosets with excellent flame resistance is vital to various applications (i.e., composites, coatings and adhesives). Herein, a difunctional epoxy monomer bis(2-methoxy-4-(oxiran-2-ylmethyl)phenyl) phenyl phosphate (BEU-EP) was synthesized from abundant and biobased eugenol . In addition, BEU-EP was cured by 4,4′-diaminodiphenyl methane (DDM) and the cured resin diglycidyl ether of bisphenol A (DGEBA)/DDM was used as a reference. Results indicated that BEU-EP/DDM not only showed a 58.1%, 28.8% and 35.1% increase in residual char (at 700 °C), flexural and storage modulus (at 30 °C) compared with DGEBA/DDM, but also exhibited excellent flame resistance and smoke suppression. BEU-EP/DDM passed V-0 rating (in UL-94 testing) with limiting oxygen index (LOI) of 38.4% and greatly decreased the peak heat release rate (pHRR) and total smoke production (TSP) by 84.9% and 80.5%, respectively. The mechanism analysis confirmed that the phosphorus-containing group and aromatic structure from BEU-EP contributed both the gas and condensed-phase flame retardation of BEU-EP/DDM network. This work provides an efficient and scalable route for synthesizing biobased epoxy thermosets with high integrated performance and superior flame resistance.
研究领域:
材料科学
·
化学工程
·
高分子科学
✓ 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）