Polymers
·
2019
·Vol. 11
·期 5
·884
·
IF 3.164
Kangming Xu,Qiaoman Hu,Junhui Wang,Hongdi Zhou,Jinlei Chen
Although hindered phenol/polymer-based hybrid damping materials, with excellent damping performance, attract more and more attention, the poor stability of hindered phenol limits the application of such promising materials. To solve this problem, a linear hindered phenol with amorphous state and low polarity was synthesized and related polyurethane-based hybrid materials were prepared in this study. The structure and state of the hindered phenol were confirmed by nuclear magnetic resonance spectrum, Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). The existence of intermolecular hydrogen bonds (HBs) between hindered phenol and polyurethane was confirmed by FT-IR, and the amorphous state of the hybrids was confirmed by XRD. Moreover, by a combination of molecular dynamics simulation and dynamic mechanical analysis, the relationship between the structure optimization of the hindered phenol and the high damping performance of the hybrids was quantitatively revealed. By constructing the synthetic hindered phenol, the intramolecular HBs between hindered phenols were restricted, while the strength and concentration of the intermolecular HBs increased by increasing the amount of hindered phenol. Thus, intermolecular interactions were enhanced, which lead to the compact chain packing of polyurethane, extended chain packing of hindered phenol, and good dispersion of hindered phenol in polyurethane. Therefore, the stability of the hindered phenol and the damping properties of the hybrids were both improved. The experiment results are expected to provide some useful information for the design and fabrication of high-performance polymeric damping materials.Keywords:hindered phenol/polymer-based hybrid damping materials;stability;high damping performance;structure optimization;damping mechanism
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2021
·Vol. 222
·期 6
·2000457
·
IF 2.527
Wenhai Zhang,Fangxing Ma,Zhaohui Meng,Lingqing Kong,Ziyang Dai,Guangxing Zhao,Anna Zhu,Xiang-Yang Liu,Naibo Lin
Damping materials have application prospects in shock absorption and noise reduction due to their ability to convert vibration into other forms of energy dissipation. Although there have been tremendous attempts to prepare materials with high damping performance, it is still a challenge to fabricate materials with excellent mechanical properties and stability while maintaining a high energy dissipation capacity. Herein, damping materials of reinforced waterborne polyurethane by adjusting the ratio of soft and hard segments is reported. As the content of hard segments increases, the content of hydrogen bonds interaction between segments increases and the phase boundaries on the microscopic morphology form which obviously enhances the damping capacity. The ultimate samples exhibit a damping capacity of more than 90% and a toughness of 14.8 MJ m –3 , maintaining good toughness while exceeding the damping capacity of the most reported materials. The damping mechanisms are summarized into three aspects, the frication among soft segments, the destruction of hydrogen bonds, and the interface friction between soft and hard domains. This work paves an avenue for the application of waterborne polyurethane materials in kinetic energy buffering and impact reduction.
研究领域:
材料科学
·
聚合物化学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2025
·
IF 7.9
Ruichao Zu,Wenzheng Chen,Yicang Huang,Yujie Chen,Chengzhen Du,Qunfu Fan,Hua Li,Hezhou Liu
Commercially available thermoplastic polyurethane (TPU) materials for 3D printing often exhibit inadequate damping properties, limiting their application in damping scenarios. However, 3D printing TPU filaments specifically engineered for enhanced damping performance frequently lack sufficient stiffness, causing printing continuity issues. To address these challenges, this study investigates the rational design of TPU composites by regulating TPU molecular structure and incorporating polylactic acid (PLA) to enhance both damping performance and stiffness. The results reveal that a prepolymer curing coefficient of 2.0, combined with a chain extender ratio of Dimethyl thio-toluene diamine (DMTDA) to 1,4-Butanediol (BDO) at 5:5, optimizes the damping and mechanical properties of the TPU material. Furthermore, by incorporating 30 wt% PLA particles into the TPU matrix, the obtained TPU7/PLA3 composite filament has excellent printability and admirable damping properties with a peak damping value of 0.60 around room temperature and an effective damping temperature range exceeding 100 °C. A lattice structure resembling Kelvin foam was successfully fabricated using the TPU/PLA filaments, demonstrating superior damping performance compared to commercial TPU filaments and underscoring its potential for energy absorption applications.
研究领域:
材料科学
·
工程学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2021
·Vol. 13
·期 9
·1406
·
IF 4.329
Daoyuan Chen,Mingjin Ding,Zhixiong Huang,Yanbing Wang
In order to study the dynamic mechanical properties of styrene–acrylic latex with a core/shell structure, a variety of latexes were synthesized by semi-continuous seeded emulsion polymerization based on “particle design” with the same material. The latexes were characterized by rotary viscosimeter, dynamic light scattering (DLS), Fourier transform infrared spectroscopy (FTIR), transmission electron microscope (TEM), dynamic mechanical analysis (DMA), and universal testing machine. The effects of difference at the glass transition temperature (Tg) of core and shell and the introduction of the “transition layer” on the damping and mechanical properties of latex film were studied. The results indicate that as theTgof core and shell gets closer, the better the compatibility of core and shell, from phase separation to phase continuity. Furthermore, the introduction of the “transition layer” can effectively improve the tensile strength and tan δ (max) of the latex film. The tensile strength and maximum loss factor (f = 1 Hz) of latex with the “transition layer” increased by 36.73% and 29.11% respectively compared with the latex without the “transition layer”. This work provides a reference for the design of emulsion for damping coating.Keywords:styrene–acrylic;damping;core/shell;transition layer
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED ACOUSTICS
·
2022
·
IF 3.614
Jiahao Chen,Huiqin Li,Nian Wang,Jixian Gong,Zheng Li,Qiujin Li,Jianfei Zhang
Noise, such as people talking, car whistle, tire friction, etc., affect people’s lives. In practical applications, curtains and wall coverings have sound absorption function to reduce noise annoyance is expected by people. In order to improve the sound absorption of the widely used woven fabric, a damping membrane was constructed on the fabric surface to prepare a flexible sound-absorbing composite material. Effects of fabric structure, constructed structure, membrane thickness, filler on the sound absorption of the composite were explored. From the results, the sound absorption of composite is caused by the porous sound absorption of the fabric, the damping and noise reduction of the membrane and the resonance sound absorption of the structure, which cannot be simply predicted by the model. When the membrane thickness of the structure was about 50 μm and the filler was vermiculite, the composite exhibited the best sound absorption performance: the sound absorption coefficient ( α ) reached 0.56, which was about 2.8 times that of the fabric. Moreover, the sound absorption bandwidth of the composite was nearly 1500 Hz wider than that of fabrics. This flexible composite material can be used as sound-absorbing products such as wall coverings, thin curtains and other products.
研究领域:
材料科学
·
声学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 32
·期 5
·2185-2196
·
IF 3.665
Jiang Xiaolin,Qin Rui,Wang Minhui,Xu Min,Sheng Yeming,Lu Xun
Aiming at the common problems of weak controllability of damping temperature range and poor mechanical properties in damping elastomer materials. Herein, we design a polyurethane-containing dynamic disulfide bonds and dangling chains to address this dilemma. The as-prepared polyurethane exhibits an unprecedented damping range of 182°C (−62 to 120°C), and the tensile strength reaches 6.8 MPa, which is at the forefront of the same type of research. We innovatively introduce aromatic disulfides to the system, in which disulfide bonds can be spontaneously exchanged dynamically at room temperature, making the damping performance of the elastomer above room temperature improved, and a small amount of hydroxyl-terminated polydimethylsiloxane (OH-PDMS) is used as a dangling chain to promote the damping property of the elastomer between the glass transition temperature and room temperature. The synergistic effect of disulfide bonds and dangling chains makes the controllability of polyurethane damping temperature range realized. Furthermore, polyurethane elastomer is equipped with good thermal stability duo to the introduction of OH-PDMS. And, the high-performance polyurethane elastomer has great potential in practical application.
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
Materials Chemistry Frontiers
·
2021
·Vol. 5
·期 24
·8387-8396
·
IF 6.482
Ying Ge,Xueqin Zhang,You Shi,Yuanbo Cai,Shengtai Zhou,Mei Liang,Huawei Zou
In this work, a modified curing agent (MCA) with a flexible long chain and semi-aromatic amide units was synthesized using M-benzoyl chloride and polyether amine (D-230 and D-400), and then innovatively incorporated into epoxy to prepare a multifunctional epoxy structural adhesive with superior flexibility, damping and durability. It was shown that the strength of the MCA modified epoxy thermosets was 18 MPa, and the elongation at break was significantly improved to 17.9 times higher than that of the control blending samples (D-230, D-230&D-400 and D-400). Meanwhile, the MCA modified epoxy resin exhibited great damping behavior; its damping temperature range was from 24.3 °C to 81.6 °C, suggesting that it was a good damping material. After three stretch–recovery cycles, over 97% of the tensile strength of the MCA modified epoxy was still maintained, indicating that it has good stress fatigue durability. This new multifunctional epoxy adhesive significantly broadened the usage of epoxy and has the potential for use as a high damping adhesive in the automotive and aerospace fields.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
POLYMER COMPOSITES
·
2025
·
IF 4.7
Shuoli Peng,Liyun Guo,Feiyang Geng,Yudong Liu,Jinhui Liu,Jing Hua
L-cysteine, a bio-based modifier with multiple functional groups (thiol, amino, and carboxyl), holds promise for polymer modification. However, its tendency to agglomerate and poor solubility in nonpolar polymers limits its effectiveness. In this study, 1,2-polybutadiene (1,2-PB) was intercalated within MXene layers to enhance L-cysteine dispersibility. The intercalation allowed nanoscale distribution of 1,2-PB within MXene sheets, while interactions between MXene's hydroxyl groups and L-cysteine's polar groups promoted uniform dispersion in the rubber matrix. Compared with physical blending, the grafting degree of L-cysteine is higher, thereby more effectively restricting the movement of molecular chains, which leads to an increase in the effective damping temperature by over 7°C. Additionally, due to the ionic interactions between the functional groups, the resulting composite exhibits favorable dielectric performance, with the dielectric constant increasing from 2.5 to 3.2. Experimental results demonstrate that the synergistic effect between MXene and L-cysteine improves both the damping and dielectric properties of the resulting composites. This study presents a novel approach using two-dimensional nanosheets and bio-based thiols for modifying polybutadiene, offering a potential path for high-performance functional materials. Highlights In-situ polymerization enhances MXene distribution in the matrix. Grafting degree of L-cysteine increases with MXene incorporation. Well-dispersed MXene reduces L-cysteine aggregation, enhancing mechanical strength. Effective damping temperature rises by over 7°C with MXene and L-cysteine. Dielectric constant of composites increases from 2.5 to 3.2.
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
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Mingman Sun,Xinghui Liu,Tao Zhang,Xue Zhang,Jialin Jia,Hao Xing,Wenna Wu,Shuang Tong,Shude Yang
It is a significant challenge to flexible wearable sensors that incur unstable output signals and malfunction because of omnipresent low-frequency vibrations. Because their design in terms of molecular friction is almost the opposite of the elasticity of the material, current sensing soft materials possess adequate elasticity but inadequate damping vibration. In contrast, using highly damaging materials for sensing is challenging due to their substantial hysteresis. Herein, a highly self-damping ionic elastomer with a heterogeneous two-phase structure is introduced by the one-step photopolymerization of fluorinated monomers and hydrophobic lauryl methacrylate (LMA). The distinct self-assembly behavior between fluorinated contents makes the occurrence of phase separation easier and thus decouples the damping and elastic functions into two different phases. This unique design overcomes the long-standing contradictions in the damping and elasticity of conventional gel materials. Thus, the optimal ionic elastomer of HIE-43 mol % achieves high stretchability, conductivity, elastic recovery, strain-stiffening, underwater adhesion, and high loss factors (tan δ > 1). Finally, reliable human motion sensing and underwater communication could be achieved with the ability of shock resistance and noise interference resistance. This study opens the door for the development of self-damping flexible conductive materials with robust sensing and protective applications.
研究领域:
材料科学
·
柔性电子
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2020
·
IF 4.244
Xiuying Zhao,Tao Shou,Riran Liang,Shikai Hu,Peng Yu,Liqun Zhang
The gradual exhaustion of conventional fossil fuels makes it significant to develop renewable materials. Thermoplastic polyurethane (TPU), offering the advantages of processability and recyclability of thermoplastics, is gaining increasing attention for economic and environmental concerns. Despite the broad range of applications, the production of TPU is still highly dependent on fossil-based polyols and isocyanates. The development of sustainable polyols and isocyanates that derived from non-petrochemical sources is highly desirable. Notably, polylactic acid (PLA) is acknowledged as the most promising material in the bio-based polymer sector. In this research, we attempt to use the PLA-derived polyol as a renewable raw material to synthesize PLA-based TPUs. The properties of the PLA-based TPUs are comprehensively characterized by Fourier Transform Infrared Spectroscopy (FTIR), Gel Permeation Chromatography (GPC), Differential Scanning Calorimetry (DSC), Dynamic Mechanical Analysis (DMA), and tensile testing. The results showed that the TPUs based on PLA derivative exhibit a balanced mechanical property. Notably, the TPUs exhibit pronounced damping property around room temperature, enabling it as a promising damping material. And its mechanical performances were well maintained while damping performance was markedly enhanced after multiple reprocessing cycles. The value of this work lies in the fact that well-balanced properties of bio-based TPUs have been achieved by the use of renewable poly (lactic acid) derived component, which might be fruitful for increasing the renewable content of TPUs for a sustainable world.
研究领域:
材料科学
·
生物工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2016
·Vol. 23
·期 7
·1-10
·
IF 1.969
Heng Zhengguang,Li Rui,Chen Yang,Zou Huawei,Liang Mei
Amphiphilic triblock copolymer Poly(ε-caprolactone)-block-polydimethylsiloxane-block-poly(ε-caprolactone) (PCL-b-PDMS-b-PCL, LDL) was synthesized via the ring-opening polymerization of ε-caprolactone in the presence of hydroxyl-terminated polydimethylsiloxane (HTPDMS) and was utilized to modify epoxy. The tensile strength and elongation at break were simultaneously enhanced when the triblock copolymer was incorporated. With increasing the concentration of the triblock copolymer, the damping temperature range (tanδ >0.25) was broadened from 21 °C to 34.5 °C. Meanwhile, the storage modulus of the composites and the values of tanδ had no significant decrease. When the concentration of the triblock copolymer was 20 wt%, the value of K IC attained 1.68 MN/m 3/2 , which was 1.56 times that of the neat epoxy (1.08 MN/m 3/2 ). Besides, the characterization of hydrophobic and hydrophilic performance indicated that the incorporation of the triblock copolymer made epoxy resins transformed from hydrophilic to hydrophobic. It is expected that damping composites obtained by this method may be used as damping structural integration materials in future.
研究领域:
材料科学
·
高分子科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2024
·Vol. 35
·期 12
·e70018
·
IF 3.1
Xiaowen Wang,Jun Yan,Yan Yu,Haoyan Qiu,Xuanchuan Li,Paul Joseph,Meiling Zhong,Xinyue Hu,Ri-Chao Zhang
Generally, polymeric materials with superior damping characteristics are in great demand for many advanced functional applications, such as in building, aerospace, electronics, and transport sectors. However, it still remains a challenge to improve the damping characteristics of such materials owing to the lack of adequate practical knowledge in this area. Here, we report on the successful fabrication of silicon rubber (SR)/ferric oxide (Fe 3 O 4 ) composites with excellent damping characteristics. The results obtained from the study showed that the damping characteristics of the specimens increased with the loading of Fe 3 O 4 within a range of −105°C to 200°C. Specifically, the damping factor (tan δ ) is 0.45 at room temperature, and the effective working temperature, the temperatures that correspond to the tan δ > 0.3, ranged from −105°C to 165°C for the loading of Fe 3 O 4 at 60 phr. The scanning electron microscopy results showed that the excellent damping characteristics of composites can be attributed to the good dispersion of Fe 3 O 4 in the SR matrix. This work, therefore, opens up a pathway toward a relatively easy and up-scalable means for fabricating polymer composites that have superior damping characteristics and ones with a wider applicability.
研究领域:
材料科学
·
复合材料
✓ 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）