MACROMOLECULAR MATERIALS AND ENGINEERING
·
2021
·Vol. 307
·期 2
·2100702
·
IF 4.367
Yiming Wang,Zhen Yu,Ajit Dattatray Phule,Yongxian Zhao,Shibao Wen,Zhen Xiu Zhang
Herein, a developed microcellular foam from polybutadiene rubber (BR) and styrene butadiene rubber (SBR), which is prepared by prevulcanization, supercritical foaming, and secondary vulcanization processes is reported. It has excellent abrasion resistance and with low density. The foaming process is successfully achieved with the assistance of eco-friendly supercritical nitrogen (sc-N 2 ). The microstructural analysis of BR/SBR foams indicates that the cell structure of BR/SBR foams has an obvious effect with the increased prevulcanization time. The thickness of solid skin on the foam surface is observed using scanning electron microscope, which revealed that the prevulcanization time is also a direct factor influencing the thickness of solid skin, where the fundamental cause is explained from two aspects, i.e., gas escape and rubber vulcanization. The prevulcanization time to meet the abrasion resistance characteristics has determined based on the cell structure and abrasion solid skin thickness of BR/SBR foams at different time zone of prevulcanizations. As a result, BR/SBR foams prepared by this process have a low relative volume loss (62.6–117.1 mm 3 ) and a desirable density (0.50–0.71 g cm −3 ) at a prevulcanization time of 15–17 min.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2022
·Vol. 43
·期 11
·8228-8238
·
IF 3.531
Zhongying Wang,Huan Wang,Xiaomei Shen,Qingfu Wang,Zhiqian Wang,Fanghui Wang,Hong Zhu
In this work, a series of C 3 N 4 /SiO 2 nanohybrids were prepared and incorporated to solution polymerized styrene-butadiene rubber/butadiene rubber (SSBR/BR) to prepare “green tire” tread rubber. As expected, C 3 N 4 /SiO 2 nanohybrids are uniformly dispersed in SSBR/BR, and SiO 2 possesses a small average particle size of ~15 nm. In addition, the interfacial interaction between C 3 N 4 /SiO 2 nanohybrids and rubber matrix are significantly enhanced. Hence, the mechanical properties of C 3 N 4 /SiO 2 -SSBR/BR nanocomposites are greatly improved. The tensile strength of 5% C 3 N 4 /SiO 2 -SSBR/BR nanocomposites (5 wt% C 3 N 4 in C 3 N 4 /SiO 2 ) improved 1580% compared to pristine SSBR/BR. Furthermore, dynamic mechanical analyses indicate the increasing wet skid resistance (10.8% higher) and decreasing rolling resistance (50.5% lower) of 5% C 3 N 4 /SiO 2 -SSBR/BR nanocomposites compared with SiO 2 -SSBR/BR. In addition, the wear volume and heat built-up are reduced at the same time. This work paves the way to prepare high comprehensive performance “green tire” and could be extend to the reinforcement of elastomer composites.
研究领域:
材料科学
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高分子化学
·
纳米技术
✓ 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
WEAR
·
2016
·
IF 2.323
Y.P. Wu,Y. Zhou,J.L. Li,H.D. Zhou,J.M. Chen,H.C. Zhao
As the main component of the tire treads, styrene butadiene rubber (SBR) is widely used to make tire tread for cars in the rubber industry; understanding the friction and wear properties of tire tread rubber is important to improve the safety of the cars. This study aimed to investigate the tribological properties and wear mechanism of SBR under dry and wet conditions; an improved commercial block-on-ring friction testing machine was used to conduct sliding wear tests between SBR and marble block. The friction coefficients , wear rates and wear debris were analyzed under dry and wet conditions in detail. In addition, the contribution of adhesion and hysteresis components to friction coefficient that originated from the changes of loading was discussed. The results indicated that the applied loads have a significant effect on the friction and wear properties of the SBR composites. Under the condition of dry friction , wear losses increased with the increasing load and the main wear mechanism is both severe adhesive and abrasive wear ; under the condition of water existence, the applied loads would not affect the wear losses, and the wear mechanism is abrasive wear. The knowledge gained in this study is anticipated to provide the theoretical data for a wear theory study of SBR tire tread and can be used for the optimization of designing higher performance tire treads.
研究领域:
材料科学
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2024
·
IF 6.3
Changou Pan,Zhirong Shi,Ruochen Zhang,Peng Liu
Metathetic degradation has been recognized as promising strategy for the treatment of waste vulcanized rubbers as a Waste-to-Resources approach, not only eliminating the pollution but also recycling as resources. However, it was mainly used for the treatment of the waste vulcanized natural rubber, which contains plentiful cis -1,4- structure. Despite of a much higher consumption of the emulsion type butadiene-based rubbers than natural rubber, there was no report on the metathetic degradation of the waste vulcanized emulsion type butadiene-based rubbers due to their less cis -1,4- unit, although the metathetic functionalization of the nonvulcanized emulsion type butadiene-based rubbers have been well reported. Here, the metathetic degradation of waste vulcanized emulsion type butadiene-based rubber was explored with nitrile-butadiene rubber (NBR) glove as a model. Different from the metathetic degradation of waste vulcanized natural rubber via only cross metathesis between cis -1,4-structure and the chain transfer agent (CTA), the ring closing metathesis between the adjacent cis -1,4-structure and 1,2-structure also occurred in the metathetic degradation of waste vulcanized NBR. It is expected to open the door for the Waste-to-Resources approach of all waste vulcanized emulsion type diene-based rubbers.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 26
·e52464
·
IF 3.057
Yingjie Song,Guangyi Lin,Lin Zhang,Chuanbao Geng,Qiao Li,Hong Wang,Fumin Liu,Zhenning Liang,Yuan Jing,Yong Li
The wear resistance of rubber composite materials has always been the focus of research. The wear resistance will not only affect the service life of products and the safety of equipment, but also have an important impact on the environment. In this work, the preparation and properties of wear-resistant rubber nanocomposites based on natural rubber (NR) were studied. It is dedicated to improving the wear resistance of NR composites. On this basis, the dispersibility of montmorillonite (MMT) hybrid materials in NR-based rubber composites was explored. SiO 2 @MMT, SiO 2 @MMT@KH560, PDA@GO, and MMT@GO hybrid materials were prepared, and the hybrid materials were applied to the NR/butadiene rubber (NR/BR) system, and NR/BR/hybrid material composite materials were successfully prepared. The results show that the interlayer spacing of MMT in hybrid materials increases, which effectively improves the dispersibility of MMT in rubber matrix. The tensile strength of NR/BR/MMT@GO composite material increased by 12%, the elongation at break increased by 25%, the DIN abrasion decreased by 16.5% compared with the optimum wear rubber formula, and the wear resistance was greatly improved. This work provides a feasible way for the design of functional polymer composites.
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
ACS Applied Polymer Materials
·
2023
·
IF 5
Yongshuang Huang,Jie Li,Meizhou Qi,Guifu Si,Chen Tan
Functionalization and reinforcement of polymers by introducing dynamic sacrificial bonds have attracted increasing attention. In this contribution, the in situ modification of isoprene rubber by the formation of sacrificial bonds during vulcanization has been investigated. The sacrificial bonds were formed by in situ introduction of hydrogen bonds and metal–ligand motifs, which became part of the vulcanized isoprene rubber network by reaction of the former with the vulcanizing agent. The introduction of three-component modifiers (nadic anhydride (NA), 2-aminopyrimidine (AP), and ZnCl2) and the molar ratio of these components can greatly affect the tensile strength and modulus of the vulcanized rubber. Under the external load, the sacrificial bonds preferentially rupture prior to the covalent network and facilitate rubber chain orientation, resulting in high fracture energy. In addition, the dynamic behavior of the sacrificial bonds and the hysteresis behavior of the vulcanized rubbers were studied.
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
Journal of Cleaner Production
·
2023
·
IF 11.1
Benteng Liu,Zhaopeng Hu,Xinke Zhong,Li Yang,Xin Jiang,Min Zuo,Miao Du,Yihu Song,Qiang Zheng,Danling Wang
Deep eutectic solvents (DESs) are able to promote vulcanization of rubbers while the mechanisms remain unclear. Herein 4-methyl-5,7-dihydroxycoumarin (DHMC) as hydrogen bond donor (HBD) was used to synthesize DES by reaction with tetrabutylammonium bromide (TBAB) as hydrogen bond acceptor (HBA). The effects of DHMC, TBAB and DES on vulcanization of natural rubber (NR) and isoprene rubber (IR) were studied. It is shown that DES could participate in crosslinking network and adjust crosslinking density ( v c ) of the vulcanizates through physical and chemical interactions with NR non-rubber components, zinc oxide (ZnO) activator and N -cyclohexyl-2-benzothiazolesulfenamide (CZ) accelerator. Furthermore, DES influences linear and nonlinear rheological responses and mechanical behaviors of NR vulcanizates. The NR vulcanizates cured at 120 °C with 0.1–0.3 phr (part per hundred parts of rubber) DES exhibit higher tensile strengths and lower v c in comparison with the control one cured at 140 °C, which is assigned to the more homogenous crosslinking network in the former. This work provides an effective way to modulate the crosslinking network to produce high-strength vulcanizates at lowered vulcanization temperatures and ZnO amount, which is beneficial for the preparation of rubber products with high strengths and low hysteresis energies.
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
POLYMER COMPOSITES
·
2013
·Vol. 34
·期 7
·1013-1019
·
IF 1.482
Jianjun Han,Haifeng Lu,Lin Zhang,Jie Zhang,Shengyu Feng
A novel rubber composite of acrylonitrile-butadiene rubber (NBR) filled with gadolinium salt (GS) particles was prepared for the first time and vulcanized via coordination reactions. The resulting materials exhibit good mechanical properties. Structural analyses indicate that the composite is a kind of elastomers based on coordination cross-linking interactions between the nitrile groups (–CN) of NBR and gadolinium ions. The mechanical properties of vulcanized GS/NBR rubber are altered when the cross-link density is changed in the composites. These materials show good irradiation resistance because of the introduction of GS. POLYM. COMPOS., 34:1013–1019, 2013. © 2013 Society of Plastics Engineers
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2021
·
IF 4.598
Qiang Gui,Changou Pan,Pengwei Xie,Mingliang Pei,Peng Liu
Fluorination could efficiently improve the comprehensive performance of nitrile-butadiene rubber (NBR). However, severe gelation usually occurred in the radical graft polymerization onto the diene-based polymers. Here, a facile approach has been established for the facile fluorination of NBR without gelation via radical graft polymerization in presence of n -dodecylmercaptan (NDM) as chain transfer agent, with 2,2,3,4,4,4-hexafluorobutyl acrylate (F6) as the model fluorinating monomer. The gel content decreased with increasing the feeding ratio of NDM and reached 0 with a feeding ratio of NDM of 50 mol% of the initiator, with a fluorination degree of 0.50%. The graft polymerization mechanism was proposed with the 1 H NMR analysis. The proposed strategy is expected to provide a promising approach for the functionalization of diene-based polymers.
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Munir Hussain,Sohail Yasin,Muhammad Adnan Akram,Huilong Xu,Yihu Song,Qiang Zheng
Nanoparticle dispersion is important for the performance of rubber compounds. Herein, ionic liquids (ILs) and silane are used to prepare silica-filled butadiene rubber vulcanizates. The results show that replacement of a half of silane by ILs could greatly improve the dispersions of silica and zinc oxide, restrain the migration of sulfur and other additives inside the composite, and maintain the cross-linking degree of the matrix possibly by suppressing the adsorption of sulfur and other additives by silica. The regulated filler dispersity and matrix cross-linking strongly influence the dynamic rheological behaviors of the vulcanizates as a function of silica volume fraction. In comparison with silane, the introduction of ILs could improve the reinforcement effect, reduce energy dissipation, and lower the frequency dependences of loss modulus and loss tangent in the linear region.
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
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
危险品化学品经营许可证（带存储）