POLYMER
·
2016
·
IF 3.586
Qinzhuo Zhou,Anqi Wang,Lu Dai,Suyun Jie,Bo-Geng Li
A series of hydroxyl functionalized polybutadienes has been prepared by combining the oxidolysis and reduction of cis -polybutadiene rubber (BR). For the first time, multi-hydroxyl polybutadiene (MHPB) with α,ω- and intrachain hydroxyl groups was synthesized through the simultaneous reduction of –CHO and epoxy groups in epoxidized aldehyde group terminated polybutadiene (EATPB) by sodium dihydro-bis-(2-methoxyethoxy) aluminate (Red-Al). The corresponding hydroxyl functionalized polyethylenes , including hydroxyl-terminated polyethylene (HTPE), multi-hydroxyl polyethylene (MHPE) and hydroxyl-terminated polyethylene with ethyl branches (FHTPE), were readily obtained via the hydrogenation of C=C double bonds in the functionalized polybutadienes with TSH/TPA regents. The microstructures of all the products were confirmed by 1 H NMR, 13 C NMR and FT-IR, and their thermal properties were determined by TGA and DSC . It has been indicated that the linear HTPE and MHPE possessed high initial thermal degradation temperature, high degree of crystallinity , and high melting temperature due to their stereoregular microstructure. However, the FHTPE obtained through the hydrogenation of HTPB from free radical polymerization had much lower degree of crystallinity and melting temperature due to the presence of more ethyl branches.
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
EUROPEAN POLYMER JOURNAL
·
2021
·
IF 4.598
Li Xu,Suyun Jie,Zhiyang Bu,Bo-Geng Li
As a telechelic polymer, the primary amine-terminated cis -polybutadiene (AmTPB) has a wide application prospect due to its active hydrogens in both end groups and high cis 1,4-chain structure. In this work, the AmTPB with high cis -1,4 content (>96%) was prepared for the first time by taking cis -polybutadiene as a starting material. Firstly, the aldehyde-terminated polybutadiene (ATPB) in a molecular weight range of 600–8000 g/mol was successfully synthesized by oxidative degradation of epoxidized polybutadiene prepared by reaction-controlled phase-transfer catalysis. After a simple post-processing, the AmTPB was prepared via two steps, i.e. the efficient synthesis of oxime-terminated polybutadiene (OTPB) from ATPB and the subsequent selective reduction of OTPB. The results showed that the high cis 1,4-chain structure of polybutadiene did not change in all the reactions.
研究领域:
高分子化学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 136
·期 2
·46934
·
IF 1.901
Lu Dai,Xixi Wang,Zhiyang Bu,Bo-Geng Li,Suyun Jie
Carboxyl-terminated polybutadiene (CTPB) is a widely used telechelic liquid rubber, which is mainly prepared by anionic or free-radical polymerization of 1,3-butadiene. It is known that the microstructure of liquid polybutadiene rubber largely affects its processability and mechanical properties. However, it is hard to control its microstructure in the free radical or anionic polymerization. In this study, a series of CTPB with high cis -1,4 content has been prepared for the first time via the oxidolysis and selective oxidation of cis -polybutadiene rubber (BR). Hydrogenation of their CC double bonds with p -toluenesulfonyl hydrazide/tri- n -propylamine (TSH/TPA) reagents afforded carboxyl-terminated polyethylenes (CTPE). For comparison, commercial CTPB (FCTPB), prepared by free-radical polymerization of 1,3-butadiene, was also hydrogenated and gave FCTPE with more ethyl branches. Linear CTPE (L-CTPE) was synthesized by ring-opening metathesis polymerization of 1,5-cyclooctadiene in the presence of maleic acid and subsequent hydrogenation. The microstructure of the polymers was established by FT-IR, 1 H NMR, 13 C NMR, and GPC and their thermal properties were determined by DSC and TGA. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 46934.
研究领域:
高分子化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2019
·
IF 3.771
Qingxu Zhang,Huilong Xu,Yihu Song,Qiang Zheng
Hydroxyl-terminated polybutadiene (HTPB) liquid is used to mediate the dispersity of fumed silica in cis -polybutadiene rubber (BR) to prepare nanocomposites. The introduction of HTPB promotes the dispersion of both hydrophilic and hydrophobic silicas (A200 and R974), which improves the reinforcement efficiency, delays the onset strain amplitude of nonlinear softening and enlarges the high-order harmonics in the nonlinearity region. Influence of HTPB on the linear and nonlinear rheological responses are well accounted for by data superposition on the basis of the rheological responses of the matrix. It is evidenced for the first time that the rheological nonlinearity may be enhanced in the case of improved filler dispersity. This is understandable taking the intrinsic nonlinearity of the matrix and the strain amplification effect induced by filler into consideration.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2023
·Vol. 44
·期 10
·2200971
·
IF 4.6
Jie Mao,Jing Li,Wang Lin,Faliang Luo
This work describes an easy and effective process for preparing a homogeneous polybutadiene (PB) dielectric elastomer with improved actuated strain by utilizing a photochemical thiol-ene click reaction. The carboxyl groups and various ester groups are used for grafting on the PB. Since the length of the alkyl chains of the ester groups will significantly influence the polarities of the carbonyl groups and hydrogen bonding effect, the influence of polarity and hydrogen bonding effect on the dielectric properties and mechanical properties of the modified polybutadienes is carefully discussed. Very interestingly, it is found that the increment of dielectric constant of PB modified by carboxyl groups is the lowest one compared to other modified PBs with the ester groups. Meanwhile, the modified PBs with the ester groups could achieve pretty low dielectric loss factor, and finally, a high dielectric constant (3.6), low dielectric loss factor (0.0005), and large actuated strain (≈25%) of the modified polybutadienes could be achieved by the modified PBs with butyl acrylate groups. This work provides a simple and effective method for the designing and synthesizing of a homogeneous high electromechanical performance dielectric elastomer with high dielectric constant and low dielectric loss.
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
Scientific Reports
·
2024
·Vol. 14
·期 1
·1-16
·
IF 3.8
Lu Jiaxin,Chen Chong,Zhang Bobo,Niu Kang,Xiao Fei,Liang Taixin
Boric acid and other impurities on the surface of boron (B) particles can interact with hydroxyl-terminated polybutadiene (HTPB), weakening the mechanical properties and energy release efficiency of boron-based solid rocket propellants. SA@B composite particles were created by coating stearic acid (SA) on the surface of B particles through solvent evaporation-induced self-assembly. The study investigated the impact of SA coating on the combustion performance of B particles and the mechanical properties of HTPB matrix composites. The results showed that the SA coating enhanced the oxidation efficiency of B particles in air. The combustion heat of SA@B composite particles is 30.29 MJ/g, about 50% higher than that of B particles. During the combustion of SA@B composite particles, fewer molten solid particles surround the flame, which enhances the stability of the combustion process of the B particles. Furthermore, the SA coating effectively enhanced the dispersion of B particles in HTPB. At a stretching speed of 100 mm/min, the tensile strength of the SA@B/HTPB composite materials is higher than that of the B/HTPB composite materials. Moreover, when the mass loading of the SA@B composite particles reaches 50 wt%, the tensile strength of SA@B/HTPB composite materials is 2.46 MPa. Activating the surface of boron particles with SA can significantly improve their compatibility with HTPB, which is crucial for the stable storage of boron-based solid rocket propellants.
研究领域:
材料科学
·
燃烧学
·
推进剂工程
✓ 已验证
产品关联
DOI
PubMed
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
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Long Han,Mengmeng Xu,Hairui Wang,Hongyu Zhang,Jing Hua,Chengzhong Zong
The loading of antioxidants onto inorganic fillers is a vital method for preventing the migration of rubber antioxidants. However, the loading rate is not ideal, which has been a persistent problem for scholars in this field. In this work, the mussel-based strategy was used to coat titanium carbide (Ti 3 C 2 ) surfaces with polydopamine (PDA). The amino group on the antioxidant 4-aminodiphenylamine (RT) is opened with the epoxy group on the silane coupling agent KH560, while the phenol hydroxyl group of PDA condenses with the silanol group on KH560 to prepare titanium carbide-supported antioxidant molecules (Ti 3 C 2 -RT). The layered Ti 3 C 2 dispersed in the matrix material not only effectively prevents oxygen from entering, but also provides a large specific surface area for the supported antioxidant. At the same time, the introduction of high-functionality polyamines and silane coupling agents creates conditions for the preparation of inorganic fillers with high loading rates of antioxidants. The loading rate of Ti 3 C 2 -RT was evaluated by TGA, and the mass fraction of antioxidant RT on Ti 3 C 2 -RT was approximately 16.5%, which means that it has the highest loading rate in the field of inorganic fillers loaded with antioxidants. In addition, the mechanical properties of polybutadiene rubber before and after aging were also studied. The test results show that the new antioxidant Ti 3 C 2 -RT has good anti-aging effect and can effectively prevent antioxidant precipitation. Therefore, compared to organic antioxidants, the supported antioxidant Ti 3 C 2 -RT has a longer ability to scavenge free radicals, resulting in a longer service life of rubber products.
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
·
2018
·Vol. 136
·期 1
·46906
·
IF 1.901
Jinhui Liu,Jieting Geng,Kai Liu,Lingli Zou,Zhaobo Wang,Jing Hua
Molybdenum-based random 1,2-polybutadiene (1,2-PB) rubber, with its excellent wet skid resistance, low rolling resistance, and low heat buildup, can be used for green tread rubber, and it has significant benefits for the enhancement of the mechanical strength of 1,2-PB. In this study, we investigated in detail the effects of the electronegativity and steric hindrance of the cocatalyst on the stereoselectivity of the resulting polymers. In the case of cocatalysts with moderate electronegativities, the active centers were more stable; this resulted in a larger molecular weight and a higher conversion, whereas a cocatalyst with excessive electronegativity tended to initiate cationic polymerization. The high sterically hindered substituent restricted the coordination configuration of the monomer; this ultimately resulted in the increase in the 1,2 structure to 90%. Fourier transform infrared analysis showed that the content of trans -1,4 structure increased from 7 to 66%, and its crystallinity reached 59.2%, as calculated with differential scanning calorimetry when triethyl aluminum was used as the cocatalyst. Consequently, trans -1,4-polybutadiene crystals were introduced into the 1,2-PB elastomer in one step; this could be a promising facile route for strengthening 1,2-PB. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 46906.
研究领域:
高分子化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2025
·Vol. 26
·期 7
·3410
·
IF 4.9
Xue Luo,Mengyan Li,Guliang Fu,Rentong Yu,Jianhe Liao
Natural rubber (NR) has long been plagued by inferior oil resistance and poor thermal degradation at high temperatures. Despite these limitations, NR remains the most widely used elastomer to date. Fluorine-containing compounds have demonstrated excellent oil resistance and thermal stability. However, they generally exhibit poor compatibility with non-polar polymers. After blending, macroscopic phase separation cannot be easily suppressed, leading to the deterioration of the material’s properties. In this study, fluorination modification was performed using hydroxyl-terminated polybutadiene, and the resulting fluorine-modified polybutadiene (3F-PBu-3F) was incorporated into natural rubber. Following sulfur curing, homogeneous phase morphologies were observed in all vulcanizates, which significantly differed from those of previously reported NR/polybutadiene vulcanizates. Additionally, the oil resistance and thermal stability of the NR/3F-PBu-3F vulcanizates were effectively enhanced.
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Liqian Zhu,Liang Zhu,Jijiang Hu,Zhen Yao,Zhiyang Bu,Suyun Jie,Bo-Geng Li
Polyurea elastomers with excellent mechanical properties are widely used in a variety of applications due to the unique microphase separation structure and high flexibility in formulations. A key point in the development of polyurea elastomers is to explore the structure–property relationship. However, few studies have focused on the effect of soft segment structures because of the limitation that the flexible soft segments are usually commercialized amine-terminated polyether. Herein, a series of polybutadiene-based polyurea elastomers were prepared to systematically investigate the influence of the network structures on the ultimate properties of the polyurea materials. In particular, the amine-terminated liquid polybutadiene rubber with tunable molecular weights and liquid polystyrene–butadiene rubber were synthesized via the degradation method for flexible regulation of the soft segment structure. The results demonstrated that performance optimization could be achieved by manipulating the degree of hydrogen bonding, which was controlled by the network structure. Besides, the polybutadiene-based polyurea elastomers exhibited excellent low-temperature properties, owing to the high cis-1,4 content.
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
MACROMOLECULES
·
2024
·
IF 5.1
Jiading Wang,Shaoyun Guo,Xianlong Zhang
High-energy radiation could accelerate the deterioration of polymer properties, greatly increase the risk of equipment failure, and reduce the polymer’s service life. Inhibition of macromolecular chemical changes in polymers is the core design concept for conventional radiation resistance. Herein, we report a novel strategy that turns the radiation reaction into a repair effect for the self-reconnection of broken chains, thereby improving the radiation resistance of polyurethane (PU) concretely; the polybutadiene (PB) segments are evenly introduced into the PU with poly(propylene glycol) (PG) to prepare the PU containing PB and PG segments (PBG-PU). During irradiation, the radical addition coupling reactions of PB segments in PBG-PU allow the broken molecular chain of PBG-PU to be reconnected, thus continually repairing the radiation damage on PBG-PU. Therefore, the PBG-PU elastomers still maintain about 70% strength with minimal alterations in creep properties and recovery rates after 300 KGy radiation, while the ordinary PU elastomers have completely lost their original properties. The combination of the self-reconnection strategy and the modification method of the hard segment can even boost radiation resistance of PU to more than three times, showing excellent radiation stability. The self-reconnection strategy can also be used to increase the stability of the ultrastructure in material during high-dose gamma ray irradiation, showing great adjustability. This novel strategy demonstrates enormous potential in achieving the long-term application of polymers in nuclear industry, space mission, and radiation medicine fields.
研究领域:
材料科学
·
辐射生物学
·
高分子化学
✓ 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）