The Experts below are selected from a list of 240 Experts worldwide ranked by ideXlab platform
Liqun Zhang - One of the best experts on this subject based on the ideXlab platform.
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Enhanced covalent interface, crosslinked network and Gas Barrier Property of functionalized graphene oxide/styrene-butadiene rubber composites triggered by thiol-ene click reaction
Composites Part B-engineering, 2020Co-Authors: Long Zheng, Liqun Zhang, Stephen Jerrams, Su Tian, Li Liu, Shipeng WenAbstract:Abstract The high Gas Barrier Property of a rubber composite is of great significance for reducing the exhaust Gas emissions due to tire rolling resistance and hence the contribution this factor makes to environmental protection. Enhanced covalent interfaces and crosslinked networks are crucial to the Gas Barrier Property of rubber composites. In this research, γ-mercaptopropyltriethoxysilane (MPS) modified GO (MGO)/styrene-butadiene rubber (SBR) composites were prepared by a synergetic strategy of latex compounding method and thiol-ene click reaction. It was found that the mercapto groups in MGO reacted with the vinyl groups in SBR molecules through thiol-ene click reaction during the crosslinking process at 150 °C, thus forming strong chemical interactions at the interface in the form of GO-MPS-rubber and enhanced crosslinked networks. Meanwhile, the strong interface promoted the dispersion of MGO in SBR. The uniform dispersion of MGO, strong interface between MGO and SBR molecules and enhanced crosslinked networks resulted in improved mechanical and Gas Barrier properties. When filling 5 phr fillers, the tensile strength and Gas Barrier properties of an MGO/SBR composite improved by 19.0% and 37.5%, respectively, relative to the comparing GO/SBR composite.
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enhanced covalent interface crosslinked network and Gas Barrier Property of functionalized graphene oxide styrene butadiene rubber composites triggered by thiol ene click reaction
Composites Part B-engineering, 2020Co-Authors: Long Zheng, Liqun Zhang, Stephen Jerrams, Li Liu, Shipeng WenAbstract:Abstract The high Gas Barrier Property of a rubber composite is of great significance for reducing the exhaust Gas emissions due to tire rolling resistance and hence the contribution this factor makes to environmental protection. Enhanced covalent interfaces and crosslinked networks are crucial to the Gas Barrier Property of rubber composites. In this research, γ-mercaptopropyltriethoxysilane (MPS) modified GO (MGO)/styrene-butadiene rubber (SBR) composites were prepared by a synergetic strategy of latex compounding method and thiol-ene click reaction. It was found that the mercapto groups in MGO reacted with the vinyl groups in SBR molecules through thiol-ene click reaction during the crosslinking process at 150 °C, thus forming strong chemical interactions at the interface in the form of GO-MPS-rubber and enhanced crosslinked networks. Meanwhile, the strong interface promoted the dispersion of MGO in SBR. The uniform dispersion of MGO, strong interface between MGO and SBR molecules and enhanced crosslinked networks resulted in improved mechanical and Gas Barrier properties. When filling 5 phr fillers, the tensile strength and Gas Barrier properties of an MGO/SBR composite improved by 19.0% and 37.5%, respectively, relative to the comparing GO/SBR composite.
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CHAPTER 3:Rubber–Rectorite Composites with High Gas Barrier Properties
Functional Polymer Composites with Nanoclays, 2016Co-Authors: Liqun ZhangAbstract:Rubber–clay nanocomposites have attracted considerable attention in the fields of materials science and engineering due to their high performance, especially their high Gas Barrier Property. Rectorite, a kind of clay mineral, has a higher aspect ratio compared with montmorillonite, and is expected to endow the rubber–clay nanocomposites with a larger enhancement in composite performance. In this chapter, we describe the dominant mechanisms for the transport of Gas molecules in rubbers and rubber nanocomposites, and the influence of the characteristics of the inorganic particles on the Barrier properties of the composite is discussed. The emphasis is placed on the Gas permeability of the various reported rubber–rectorite nanocomposites, and the potential approaches to further improve the Gas Barrier properties are also presented. Additionally, some other properties of rubber–rectorite nanocomposites are also introduced.
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improving the Gas Barrier Property of sbr clay nanocomposite through in situ sulfur modification during curing process
Applied Mechanics and Materials, 2011Co-Authors: Yiqing Wang, Jun Lin, Liqun ZhangAbstract:Rubber/clay nanocomposites have been explored as alternative materials to replace expensive halogenated butyl rubber. In order to further improve their Gas Barrier properties, a simple and efficient method through sulfur modification was applied in this work. Excess sulfur was added into SBR/clay nanocompound to prepare sulfur modified nanocomposite via the formation of cyclic sulfide in addition to crosslinking. The vulcanization behavior, mechanical properties, dynamic mechanical Property and Gas Barrier Property of the nanocomposites were investigated. It was found that the sulfur modified SBR/clay nanocomposites showed much increased glass transition temperature and lower Gas permeability.
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preparation microstructure and Property of silicon rubber organically modified montmorillonite nanocomposites and silicon rubber ommt fumed silica ternary nanocomposites
Polymer Composites, 2011Co-Authors: Liqun Zhang, Hao Zhang, Yonglai LuAbstract:Five different types of organically modified montmorillonites (OMMT), including Nanomor® I.30P, I.44P, I.24TL, I.34TCN, and I.31PS, were incorporated into silicone rubber (SiR), respectively, by using a melt-blending method. The intercalation structure and spatial dispersion of OMMT in the obtained composites were characterized with wide-angle X-ray diffraction and transmission electron microscopy. The results revealed that the high-polar organic intercalants or silane-coupling agent might play the negative roles in the melt intercalation of SiR into OMMT, and the higher the initial interlayer spacing of the OMMT, the easier the intercalation. The intercalated structure in the SiR/I.44P OMMT nanocomposite has the largest interlayer spacing, and the spatial dispersion of OMMT is also the best. When OMMT loading is low (i.e., less than 10 phr), the dispersion of OMMT is poor. The dispersion of OMMT improves with increasing OMMT dosage, when the loading does not exceed 30 phr. The Gas Barrier Property and the mechanical properties of the SiR are obviously improved by the incorporation of OMMT. The nitrogen Gas permeability coefficient of the SiR nanocomposite containing 30 phr OMMT (I.44P) is lower than that of net SiR by 31%. To further improve the dispersion of OMMT in SiR, 20 phr fumed silica (FS) was added to the compound before mixing OMMT for increasing viscosity of the compound and mechanical shearing force during compounding OMMT. The resultant SiR/OMMT/FS ternary nanocomposites exhibit improved dispersion of OMMT and better Gas Barrier Property than the binary counterparts. POLYM. COMPOS., © 2011 Society of Plastics Engineers.
Shipeng Wen - One of the best experts on this subject based on the ideXlab platform.
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Enhanced covalent interface, crosslinked network and Gas Barrier Property of functionalized graphene oxide/styrene-butadiene rubber composites triggered by thiol-ene click reaction
Composites Part B-engineering, 2020Co-Authors: Long Zheng, Liqun Zhang, Stephen Jerrams, Su Tian, Li Liu, Shipeng WenAbstract:Abstract The high Gas Barrier Property of a rubber composite is of great significance for reducing the exhaust Gas emissions due to tire rolling resistance and hence the contribution this factor makes to environmental protection. Enhanced covalent interfaces and crosslinked networks are crucial to the Gas Barrier Property of rubber composites. In this research, γ-mercaptopropyltriethoxysilane (MPS) modified GO (MGO)/styrene-butadiene rubber (SBR) composites were prepared by a synergetic strategy of latex compounding method and thiol-ene click reaction. It was found that the mercapto groups in MGO reacted with the vinyl groups in SBR molecules through thiol-ene click reaction during the crosslinking process at 150 °C, thus forming strong chemical interactions at the interface in the form of GO-MPS-rubber and enhanced crosslinked networks. Meanwhile, the strong interface promoted the dispersion of MGO in SBR. The uniform dispersion of MGO, strong interface between MGO and SBR molecules and enhanced crosslinked networks resulted in improved mechanical and Gas Barrier properties. When filling 5 phr fillers, the tensile strength and Gas Barrier properties of an MGO/SBR composite improved by 19.0% and 37.5%, respectively, relative to the comparing GO/SBR composite.
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enhanced covalent interface crosslinked network and Gas Barrier Property of functionalized graphene oxide styrene butadiene rubber composites triggered by thiol ene click reaction
Composites Part B-engineering, 2020Co-Authors: Long Zheng, Liqun Zhang, Stephen Jerrams, Li Liu, Shipeng WenAbstract:Abstract The high Gas Barrier Property of a rubber composite is of great significance for reducing the exhaust Gas emissions due to tire rolling resistance and hence the contribution this factor makes to environmental protection. Enhanced covalent interfaces and crosslinked networks are crucial to the Gas Barrier Property of rubber composites. In this research, γ-mercaptopropyltriethoxysilane (MPS) modified GO (MGO)/styrene-butadiene rubber (SBR) composites were prepared by a synergetic strategy of latex compounding method and thiol-ene click reaction. It was found that the mercapto groups in MGO reacted with the vinyl groups in SBR molecules through thiol-ene click reaction during the crosslinking process at 150 °C, thus forming strong chemical interactions at the interface in the form of GO-MPS-rubber and enhanced crosslinked networks. Meanwhile, the strong interface promoted the dispersion of MGO in SBR. The uniform dispersion of MGO, strong interface between MGO and SBR molecules and enhanced crosslinked networks resulted in improved mechanical and Gas Barrier properties. When filling 5 phr fillers, the tensile strength and Gas Barrier properties of an MGO/SBR composite improved by 19.0% and 37.5%, respectively, relative to the comparing GO/SBR composite.
Yiqing Wang - One of the best experts on this subject based on the ideXlab platform.
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Improving the Gas Barrier Property of SBR/clay Nanocomposite through In-Situ Sulfur Modification during Curing Process
2016Co-Authors: Yiqing Wang, Liqu ZhangAbstract:Abstract. Rubber/clay nanocomposites have been explored as alternative materials to replace expensive halogenated butyl rubber. In order to further improve their Gas Barrier properties, a simple and efficient method through sulfur modification was applied in this work. Excess sulfur was added into SBR/clay nanocompound to prepare sulfur modified nanocomposite via the formation of cyclic sulfide in addition to crosslinking. The vulcanization behavior, mechanical properties, dynamic mechanical Property and Gas Barrier Property of the nanocomposites were investigated. It was found that the sulfur modified SBR/clay nanocomposites showed much increased glass transition temperature and lower Gas permeability
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improving the Gas Barrier Property of sbr clay nanocomposite through in situ sulfur modification during curing process
Applied Mechanics and Materials, 2011Co-Authors: Yiqing Wang, Jun Lin, Liqun ZhangAbstract:Rubber/clay nanocomposites have been explored as alternative materials to replace expensive halogenated butyl rubber. In order to further improve their Gas Barrier properties, a simple and efficient method through sulfur modification was applied in this work. Excess sulfur was added into SBR/clay nanocompound to prepare sulfur modified nanocomposite via the formation of cyclic sulfide in addition to crosslinking. The vulcanization behavior, mechanical properties, dynamic mechanical Property and Gas Barrier Property of the nanocomposites were investigated. It was found that the sulfur modified SBR/clay nanocomposites showed much increased glass transition temperature and lower Gas permeability.
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preparation structure performance industrialisation and application of advanced rubber clay nanocomposites based on latex compounding method
Plastics Rubber and Composites, 2010Co-Authors: Shaojian He, Yiqing Wang, Yonglai Lu, Youping Wu, X H Wu, Liqun ZhangAbstract:AbstractIn this paper, the research progress of compounding method using pristine clay and commercialised rubber latex to produce rubber/layered silicate nanocomposites, namely, latex compounding method, is summarised. The properties of a series of rubber/clay nanocomposites prepared by latex compounding method are systematically presented. Latex compounding method is a low cost and easily controlled process, and quite promising to be industrialised. The resulting structure of the nanocomposites by latex compounding method is either 'separated structure' or 'intercalated structure'. The nanocomposites exhibited desirable properties, such as excellent tensile strength, superior Gas Barrier Property, improved flame retardant Property, outstanding antifatigue properties, etc. As a result, the first production line of kiloton clay/rubber nanocomposites materials in China was established and a 10 000 ton scaled production line is being constructed. The applications of the nanocomposites in tire inner tube, tir...
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A new strategy to improve the Gas Barrier Property of isobutylene–isoprene rubber/clay nanocomposites
Polymer Testing, 2008Co-Authors: Yu-rong Liang, Yiqing Wang, Wei-liang Cao, Liqun ZhangAbstract:Abstract A new strategy for preparation of isobutylene–isoprene rubber (IIR)/clay nanocomposites is reported based on two steps, i.e., preparation of swollen orgnomontmorillonite, followed by shear mixing on a two-roll mill with IIR. The dispersion of clay was investigated by transmission electron microscopy (TEM) and X-ray diffraction (XRD). TEM images demonstrate that both exfoliated and intercalated nanoclay layers co-exist in these nanocomposites. XRD patterns reveal that the basal spacing of clay increases from 4.2 nm for swollen organic modified silicates to 6.2 nm for those dispersed in nanocompounds, and the dispersion structure is extremely disordered and close to an exfoliated structure. The experimental results show that the mechanical and Gas Barrier properties of nanocomposites increased with increasing amount of clay. The properties of nanocomposites prepared by the new method, such as shore A hardness, tensile strength, air-tightness and so on, were superior to those of nanocomposites by the solution intercalation and the traditional melt intercalation methods with non-swollen organic clay. The IIR/clay nanocomposites which were prepared by the novel method could be used in rubber products which require a high Barrier to Gas, such as tire inner-tube and inner-liner.
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a new strategy to improve the Gas Barrier Property of isobutylene isoprene rubber clay nanocomposites
Polymer Testing, 2008Co-Authors: Yu-rong Liang, Yiqing Wang, Wei-liang Cao, Liqun ZhangAbstract:Abstract A new strategy for preparation of isobutylene–isoprene rubber (IIR)/clay nanocomposites is reported based on two steps, i.e., preparation of swollen orgnomontmorillonite, followed by shear mixing on a two-roll mill with IIR. The dispersion of clay was investigated by transmission electron microscopy (TEM) and X-ray diffraction (XRD). TEM images demonstrate that both exfoliated and intercalated nanoclay layers co-exist in these nanocomposites. XRD patterns reveal that the basal spacing of clay increases from 4.2 nm for swollen organic modified silicates to 6.2 nm for those dispersed in nanocompounds, and the dispersion structure is extremely disordered and close to an exfoliated structure. The experimental results show that the mechanical and Gas Barrier properties of nanocomposites increased with increasing amount of clay. The properties of nanocomposites prepared by the new method, such as shore A hardness, tensile strength, air-tightness and so on, were superior to those of nanocomposites by the solution intercalation and the traditional melt intercalation methods with non-swollen organic clay. The IIR/clay nanocomposites which were prepared by the novel method could be used in rubber products which require a high Barrier to Gas, such as tire inner-tube and inner-liner.
Long Zheng - One of the best experts on this subject based on the ideXlab platform.
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Enhanced covalent interface, crosslinked network and Gas Barrier Property of functionalized graphene oxide/styrene-butadiene rubber composites triggered by thiol-ene click reaction
Composites Part B-engineering, 2020Co-Authors: Long Zheng, Liqun Zhang, Stephen Jerrams, Su Tian, Li Liu, Shipeng WenAbstract:Abstract The high Gas Barrier Property of a rubber composite is of great significance for reducing the exhaust Gas emissions due to tire rolling resistance and hence the contribution this factor makes to environmental protection. Enhanced covalent interfaces and crosslinked networks are crucial to the Gas Barrier Property of rubber composites. In this research, γ-mercaptopropyltriethoxysilane (MPS) modified GO (MGO)/styrene-butadiene rubber (SBR) composites were prepared by a synergetic strategy of latex compounding method and thiol-ene click reaction. It was found that the mercapto groups in MGO reacted with the vinyl groups in SBR molecules through thiol-ene click reaction during the crosslinking process at 150 °C, thus forming strong chemical interactions at the interface in the form of GO-MPS-rubber and enhanced crosslinked networks. Meanwhile, the strong interface promoted the dispersion of MGO in SBR. The uniform dispersion of MGO, strong interface between MGO and SBR molecules and enhanced crosslinked networks resulted in improved mechanical and Gas Barrier properties. When filling 5 phr fillers, the tensile strength and Gas Barrier properties of an MGO/SBR composite improved by 19.0% and 37.5%, respectively, relative to the comparing GO/SBR composite.
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enhanced covalent interface crosslinked network and Gas Barrier Property of functionalized graphene oxide styrene butadiene rubber composites triggered by thiol ene click reaction
Composites Part B-engineering, 2020Co-Authors: Long Zheng, Liqun Zhang, Stephen Jerrams, Li Liu, Shipeng WenAbstract:Abstract The high Gas Barrier Property of a rubber composite is of great significance for reducing the exhaust Gas emissions due to tire rolling resistance and hence the contribution this factor makes to environmental protection. Enhanced covalent interfaces and crosslinked networks are crucial to the Gas Barrier Property of rubber composites. In this research, γ-mercaptopropyltriethoxysilane (MPS) modified GO (MGO)/styrene-butadiene rubber (SBR) composites were prepared by a synergetic strategy of latex compounding method and thiol-ene click reaction. It was found that the mercapto groups in MGO reacted with the vinyl groups in SBR molecules through thiol-ene click reaction during the crosslinking process at 150 °C, thus forming strong chemical interactions at the interface in the form of GO-MPS-rubber and enhanced crosslinked networks. Meanwhile, the strong interface promoted the dispersion of MGO in SBR. The uniform dispersion of MGO, strong interface between MGO and SBR molecules and enhanced crosslinked networks resulted in improved mechanical and Gas Barrier properties. When filling 5 phr fillers, the tensile strength and Gas Barrier properties of an MGO/SBR composite improved by 19.0% and 37.5%, respectively, relative to the comparing GO/SBR composite.
Li Liu - One of the best experts on this subject based on the ideXlab platform.
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Enhanced covalent interface, crosslinked network and Gas Barrier Property of functionalized graphene oxide/styrene-butadiene rubber composites triggered by thiol-ene click reaction
Composites Part B-engineering, 2020Co-Authors: Long Zheng, Liqun Zhang, Stephen Jerrams, Su Tian, Li Liu, Shipeng WenAbstract:Abstract The high Gas Barrier Property of a rubber composite is of great significance for reducing the exhaust Gas emissions due to tire rolling resistance and hence the contribution this factor makes to environmental protection. Enhanced covalent interfaces and crosslinked networks are crucial to the Gas Barrier Property of rubber composites. In this research, γ-mercaptopropyltriethoxysilane (MPS) modified GO (MGO)/styrene-butadiene rubber (SBR) composites were prepared by a synergetic strategy of latex compounding method and thiol-ene click reaction. It was found that the mercapto groups in MGO reacted with the vinyl groups in SBR molecules through thiol-ene click reaction during the crosslinking process at 150 °C, thus forming strong chemical interactions at the interface in the form of GO-MPS-rubber and enhanced crosslinked networks. Meanwhile, the strong interface promoted the dispersion of MGO in SBR. The uniform dispersion of MGO, strong interface between MGO and SBR molecules and enhanced crosslinked networks resulted in improved mechanical and Gas Barrier properties. When filling 5 phr fillers, the tensile strength and Gas Barrier properties of an MGO/SBR composite improved by 19.0% and 37.5%, respectively, relative to the comparing GO/SBR composite.
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enhanced covalent interface crosslinked network and Gas Barrier Property of functionalized graphene oxide styrene butadiene rubber composites triggered by thiol ene click reaction
Composites Part B-engineering, 2020Co-Authors: Long Zheng, Liqun Zhang, Stephen Jerrams, Li Liu, Shipeng WenAbstract:Abstract The high Gas Barrier Property of a rubber composite is of great significance for reducing the exhaust Gas emissions due to tire rolling resistance and hence the contribution this factor makes to environmental protection. Enhanced covalent interfaces and crosslinked networks are crucial to the Gas Barrier Property of rubber composites. In this research, γ-mercaptopropyltriethoxysilane (MPS) modified GO (MGO)/styrene-butadiene rubber (SBR) composites were prepared by a synergetic strategy of latex compounding method and thiol-ene click reaction. It was found that the mercapto groups in MGO reacted with the vinyl groups in SBR molecules through thiol-ene click reaction during the crosslinking process at 150 °C, thus forming strong chemical interactions at the interface in the form of GO-MPS-rubber and enhanced crosslinked networks. Meanwhile, the strong interface promoted the dispersion of MGO in SBR. The uniform dispersion of MGO, strong interface between MGO and SBR molecules and enhanced crosslinked networks resulted in improved mechanical and Gas Barrier properties. When filling 5 phr fillers, the tensile strength and Gas Barrier properties of an MGO/SBR composite improved by 19.0% and 37.5%, respectively, relative to the comparing GO/SBR composite.
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Layer-by-layer assembly of layered double hydroxide/rubber multilayer films with excellent Gas Barrier Property
Composites Part A-applied Science and Manufacturing, 2017Co-Authors: Lumei Wang, Li Liu, Yibo Dou, Wang Jiajie, Jingbin Han, Min WeiAbstract:Abstract Rubber nanocomposites with high Gas Barrier Property have extensive application prospects in sealing and packing industry, while developing a novel and cost-effective rubber-based material with low Gas permeability and good mechanical Property still remains a challenge. Herein, we designed and fabricated an excellent Gas Barrier film by using polyvinyl pyrrolidone modified ultrathin layered double hydroxide nanoplatelets (U-mLDH) and nitrile butadiene rubber (NBR) as building blocks. The resultant (U-mLDH/NBR) 30 film displays significantly decreased (reduced by 92.2% compared with NBR film) oxygen transmission rate with 0.626 cm 3 m –2 day –1 atm –1 , and much lower relative permeability in comparison with reported rubber composites. The improved Gas Barrier performance is ascribed to the prolonged passage of oxygen molecules and the decreased free space arising from large aspect ratio of U-mLDH and good interfacial compatibility. In addition, the (U-mLDH/NBR) 30 film also possesses high thermal stability and satisfactory mechanical Property, which would guarantee its practical applications.
