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Dive into the research topics where Shemao Wu is active.

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Featured researches published by Shemao Wu.


RSC Advances | 2016

Novel heat and oil-resistant thermoplastic vulcanizates based on ethylene-vinyl acetate rubber/poly(vinylidene fluoride)

Nanying Ning; Yueqing Hua; Hanguang Wu; Liqun Zhang; Shemao Wu; Ming Tian; Hongchi Tian; Guo-Hua Hu

Thermoplastic vulcanizates (TPVs) combine the excellent elasticity of conventional vulcanized rubbers and the easy processability and recyclability of thermoplastics. In this study, we successfully prepared novel heat and oil-resistant TPVs based on ethylene-vinyl acetate rubber (EVM) and poly(vinylidene fluoride) (PVDF) by dynamic vulcanization (DV). The phase morphology, morphological evolution, and the properties of the EVM/PVDF TPVs were studied, and the microstructure–property relationship during DV was revealed. Interestingly, a large number of EVM rubber nanoparticles are observed in the EVM/PVDF TPVs during DV, and these nanoparticles assemble into oriented EVM fibers and EVM bundles during DV. As the DV further proceeds, the oriented EVM fibers and EVM bundles agglomerate with one another more densely and further assemble into EVM spherulites, leading to an increase in the thickness of the PVDF ligaments and the deterioration of the rubber network. More importantly, our EVM/PVDF TPVs show good mechanical properties, high elasticity, good processability, excellent heat-and oil resistance, and good recyclability. This study provides guidance for the preparation of new TPVs that can replace the traditional thermosetting rubbers in automotive and oil pipeline areas.


Materials Research Innovations | 2015

The influence of structure on thermomechanical and processing property of amorphous optical material

Xiu Juan Wang; Xiuying Zhao; Dawei Yang; Shemao Wu

Abstract The influence of structure of poly(bisphenol-A carbonate) on property was systematically studied by both experiment and molecular dynamic simulation. At the molecular level, it was observed that copolymerisation of dichlorodimethylsilane did not improve the thermal stability and optical property, through 13C-nuclear magnetic resonance. Molecular simulation has good agreement with experimental results on density, half decomposition temperature (T1/2), glass transition temperature (Tg), refraction index, flow activation energy and mechanical performance. The molecular dynamics results demonstrated the feasibility of molecular simulation technique in designing materials at the molecular scale, and had advantage in improving our understanding of material’ performance and pressure–volume–temperature characteristics. The pressure–volume–temperature dependences of different microstructure amorphous were characterised to optimise the processing parameters, and to obtain accurate prediction of materials property. The empirical Tait equation of state well described the pressure–volume–temperature dependence of amorphous liquids.


Materials Research Innovations | 2015

A simulation study about the effects of temperature on the diffusion of oxygen in cis-1,4-polybutadiene

W. Zheng; Shemao Wu; Y. P. Wu; Jingwei He; Y. L. Luo

Abstract Three-dimensional periodic molecular models of amorphous cis-1,4-polybutadiene (cis-PBD) were constructed using the Materials Studio (MS)® software to study the effects of temperature on the diffusion of oxygen (O2). The radial distribution function, solubility parameter and others clearly proved the three-dimensional periodic molecular model was able to reproduce bulk experimental data of the authentic materials. The volume fraction of accessible oxygen was reckoned by fractional free volume with a probe radius of 1.8 Å. The diffusion coefficients (D) of O2 were calculated, and researches on the diffusion mechanism were made. Data obtained corresponded with the trend from available experiments and previously published simulation work. The results confirmed the accelerating effect of high temperatures on the diffusion of O2 and meanwhile suggested the favourable binding sites of thermo-oxidative aging reactions. Our findings have an important significance for promoting the development of membrane separation technology and provide valuable guidance for further research on thermo-oxidative aging of cis-PBD.


Archive | 2011

Waste Crumb rubber modified asphalt preparation method

Liqun Zhang; Yi Liu; Guichang Cao; Xiaoxi Huang; Xiaolin Li; Lixin Mao; Shemao Wu


Composites Science and Technology | 2015

High elasticity and conductivity of elastomer composites with arrayed carbon nanotubes as nanosprings

Nanying Ning; Lianjie Ji; Liqun Zhang; Jun Liu; Yonglai Lu; Shemao Wu; Hua Zou; Ming Tian; Tung W. Chan


Archive | 2011

Method for desulfurization regeneration of vulcanized rubber by employing double-screw extruder

Youyong Ge; Guoqiang Dai; Li Liu; Shemao Wu; Xiaolin Li; Liqun Zhang; Shijun Wang


Archive | 2010

Low-lag microcellular rubber material for oscillation reduction of high-speed railway fastener and preparation method thereof

Guoqiang Dai; Ming Tian; Shijun Wang; Shemao Wu; Xiuzuo Yao; Liqun Zhang; Hua Zou


Archive | 2007

Method for raising fluidity of thermoplastic cross-linked rubber

Liqun Zhang; Hongchi Tian; Xiaoning Yu; Yongcun Mi; Shemao Wu


Archive | 2009

Preparation of wear resistant thermoplastic alkene complex

Liqun Zhang; Hongchi Tian; Wenquan Chen; Xiaoning Yu; Shemao Wu; Jibin Han


Archive | 2011

Rubber nano short fiber composite material for automobile tire and preparation method thereof

Ming Tian; Shi Yin; Liqun Zhang; Hua Zou; Shemao Wu

Collaboration


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Liqun Zhang

Beijing University of Chemical Technology

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Hongchi Tian

Beijing University of Chemical Technology

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Ming Tian

Beijing University of Chemical Technology

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Hua Zou

Beijing University of Chemical Technology

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Nanying Ning

Beijing University of Chemical Technology

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Qingyan She

Beijing University of Chemical Technology

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Xiaolin Li

Beijing University of Chemical Technology

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Youyong Ge

Beijing University of Chemical Technology

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Dawei Yang

Beijing University of Chemical Technology

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Hanguang Wu

Beijing University of Chemical Technology

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