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Fabrication of a flexible microwave absorber sheet based on a composite filler with fly ash as the core filled silicone rubber
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作者 Qiuying Li Yiheng Lu Zhuoyan Shao 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2023年第3期548-558,共11页
A new type of composite filler was designed by a modified sol-gel method using fly ash(FA),Fe(NO_(3))_(3)·9H_(2)O,and Ni(NO_(3))_(2)·6H_(2)O as raw materials.The composite filler was a spherical core-shell s... A new type of composite filler was designed by a modified sol-gel method using fly ash(FA),Fe(NO_(3))_(3)·9H_(2)O,and Ni(NO_(3))_(2)·6H_(2)O as raw materials.The composite filler was a spherical core-shell structure composed of FA as the core and NiFe_(2)O_(4)as the shell.Further,the composite filler was added into the silicone rubber to fabricate the high temperature vulcanized microwave absorption materials;X-ray diffraction,fourier transform infrared spectroscopy,X-ray photoelectron spectroscopy,and scanning electron microscope confirmed that NiFe_(2)O_(4)was successfully coated on the surface of FA and formed a uniform and continuous coating layer.As expected,silicone rubber filled with the composite filler had a minimum reflection loss of-23.8 dB at 17.5 GHz with the thickness of 1.8 mm,while the effective absorption bandwidth was as high as 12 GHz.The addition of the composite filler greatly enhanced the microwave absorption properties of the system,which was resulted from multiple losses mechanism:interface polarization losses,magnetic losses,and multiple reflection losses.Also,silicone rubber filled with the composite filler exhibited excellent thermal stability,flexibility,environmental resistance,and hydrophobicity compared with traditional silicone rubber.Therefore,this work not only responds to the green chemistry to achieve efficient FA recovery,but also devises a new strategy to prepare microwave absorption materials with strong potential for civilian applications. 展开更多
关键词 fly ash microwave absorption silicone rubber multiple losses mechanism
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A Boron-based Adhesion Aid for Efficient Bonding of Silicone Rubber and Epoxy Resin
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作者 王安东 ZHOU Peng +6 位作者 TANG Xiaolin YI Shengping ZENG Qihui ZHANG Zhiqiang HU Mingjie 廖俊 黄驰 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2023年第3期718-724,共7页
We improved the adhesion between silicon based insulating materials and epoxy resin composites by adding the adhesion promoter cycloborosiloxane(BSi,cyclo-1,3,3,5,7,7-hexaphenyl-1,5-diboro-3,7-disiloxane).The experime... We improved the adhesion between silicon based insulating materials and epoxy resin composites by adding the adhesion promoter cycloborosiloxane(BSi,cyclo-1,3,3,5,7,7-hexaphenyl-1,5-diboro-3,7-disiloxane).The experimental results show that the addition of BSi in the silicone rubber(SR)system significantly increases the tensile shear strength between BSi and epoxy resin(EP),reaching 309%of the original value.On this basis,the mechanism of BSi to enhance the adhesion effect was discussed.The electron deficient B in BSi attracted the electron rich N and O in EP to enhance the chemical interaction,combined with the interfacial migration behavior in the curing process,to improve the adhesion strength.This study provides the design and synthesis ideas of adhesive aids,and a reference for further exploring the interface mechanism of epoxy resin matrix composites. 展开更多
关键词 boron based adhesion promoter epoxy resin composites silicone rubber adhesion mechanism
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用于电梯曳引机减振的MR-SRC减振器设计与分析
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作者 任志英 刘荣阳 +3 位作者 黄伟 李成威 史林炜 徐彩军 《振动与冲击》 EI CSCD 北大核心 2024年第3期295-304,共10页
针对现有曳引机减振常采用的高分子减振垫因环境因素而引发性能大幅退化问题,以电梯曳引机减振器的工程应用需求为导向,确定减振器所需阻尼元件的刚度后,采用真空渗流技术将硅橡胶填充入金属橡胶孔隙并形成包覆,研制出一款耐环境影响的... 针对现有曳引机减振常采用的高分子减振垫因环境因素而引发性能大幅退化问题,以电梯曳引机减振器的工程应用需求为导向,确定减振器所需阻尼元件的刚度后,采用真空渗流技术将硅橡胶填充入金属橡胶孔隙并形成包覆,研制出一款耐环境影响的高性能金属橡胶/硅橡胶连续互穿相复合减振材料(metal rubber-silicone rubber continuous interwoven phase composite damping material, MR-SRC)。然后基于实际结构建立电梯曳引机的有限元数值模型。对加装MR-SRC减振器前后的电梯曳引机进行了模态分析,确定了整体结构的固有频率和振型。对MR-SRC减振器进行冲击响应分析,对比不同MR-SRC材料和冲击载荷对响应的影响,校核减振器的强度。接着,基于MR-SRC的近似等效,对减振器系统的冲击响应进行了理论计算,得出金属橡胶密度为1.8 g/cm^(3)的MR-SRC减振器对减振效果最佳。最后将所制备的MR-SRC减振器安装于实际电梯曳引机,按照电梯减振国标要求,测试电梯在运行过程中的加速度和速度变化,计算并校核电梯运行的相关特性参数。该文章提出的减振器为电梯安全可靠运行提供了一种新途径。 展开更多
关键词 电梯曳引机 金属橡胶-硅胶线复合材料减振器 模态分析 冲击响应 数值模拟
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MODIFICATION OF CeO_2 AND ITS EFFECT ON THE HEAT-RESISTANCE OF SILICONE RUBBER 被引量:5
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作者 申屠宝卿 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2008年第4期489-494,共6页
By means of the wet chemical surface modification,the surface of CeO_2 was modified by vinyltrimethoxysilane (VTMS).Infrared spectroscopy was used to investigate the structure of the modified CeO_2 and the result show... By means of the wet chemical surface modification,the surface of CeO_2 was modified by vinyltrimethoxysilane (VTMS).Infrared spectroscopy was used to investigate the structure of the modified CeO_2 and the result showed that VTMS has been attached onto the surface of CeO_2.Effect of VTMS concentration on the active index of the modified CeO_2 was also studied,and the result indicated that the active index of the modified CeO_2 increases with the increase of VTMS concentration and the optimal concentration o... 展开更多
关键词 silicone rubber CeO_2 Surface modification HEAT-RESISTANCE
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INFLUENCES OF MODIFIERS ON SURFACE PROPERTIES OF WHITE CARBON BLACK AND MECHANICAL PROPERTIES OF SILICONE RUBBER 被引量:5
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作者 D.M. Zheng, J. Yan and B.Q. Jiang Chemical Engineering Department of Nanchang University, Nanchang 330029, China 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 1999年第5期1090-1093,共4页
Various of modifiers were used to modify the surface activity of white carbon black. The oil absorption, viscosity, hydrophobic rate and burning loss of white carbon black and the mechanical propertiess of silicone ru... Various of modifiers were used to modify the surface activity of white carbon black. The oil absorption, viscosity, hydrophobic rate and burning loss of white carbon black and the mechanical propertiess of silicone rubber were measured. The influences of the modifiers on the properties of white carbon black and the mechanical properties of silicone rubber were discussed. 展开更多
关键词 white carbon black MODIFIER silicone rubber
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Synergistic Antiflaming of Expandable Graphite on the Sealing Silicone Rubber 被引量:4
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作者 王红宇 TIAN Jian 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2013年第4期706-709,共4页
To study the effects of different proportions of aluminum hydroxide and expandable graphite (EG) composites on flame retardation, sealing, mechanical, electrical and other properties of RTV- 1, aluminum hydroxide/ex... To study the effects of different proportions of aluminum hydroxide and expandable graphite (EG) composites on flame retardation, sealing, mechanical, electrical and other properties of RTV- 1, aluminum hydroxide/expandable graphite (ATH/EG) and silicone rubber composites were prepared by the compression molding method. The experimental results show that heat resistance improves with the increase of proportion of EG. Although the resistance coefficient changes, the composite materials still keep good electrical insulating property. Moreover, oxygen index and expansion index rise first then fall. When ATH/EG is 1:1, the oxygen index reaches the highest; the mechanical property of the silicone rubber is not affected under various environments such as acid, alkali, oily, artificial sea water environments, etc. 展开更多
关键词 silicone rubber ATH EG halogen-free flame retardant expansive sealing
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Electrical treeing behaviors in silicone rubber under an impulse voltage considering high temperature 被引量:4
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作者 Yunxiao ZHANG Yuanxiang ZHOU +3 位作者 Ling ZHANG Zhen LIN Jie LIU Zhongliu ZHOU 《Plasma Science and Technology》 SCIE EI CAS CSCD 2018年第5期84-91,共8页
In this paper,work was conducted to reveal electrical tree behaviors(initiation and propagation)of silicone rubber(SIR) under an impulse voltage with high temperature.Impulse frequencies ranging from 10 Hz to 1 k ... In this paper,work was conducted to reveal electrical tree behaviors(initiation and propagation)of silicone rubber(SIR) under an impulse voltage with high temperature.Impulse frequencies ranging from 10 Hz to 1 k Hz were applied and the temperature was controlled between 30 °C and 90 °C.Experimental results show that tree initiation voltage decreases with increasing pulse frequency,and the descending amplitude is different in different frequency bands.As the pulse frequency increases,more frequent partial discharges occur in the channel,increasing the tree growth rate and the final shape intensity.As for temperature,the initiation voltage decreases and the tree shape becomes denser as the temperature gets higher.Based on differential scanning calorimetry results,we believe that partial segment relaxation of SIR at high temperature leads to a decrease in the initiation voltage.However,the tree growth rate decreases with increasing temperature.Carbonization deposition in the channel under high temperature was observed under microscope and proven by Raman analysis.Different tree growth models considering tree channel characteristics are proposed.It is believed that increasing the conductivity in the tree channel restrains the partial discharge,holding back the tree growth at high temperature. 展开更多
关键词 silicone rubber electrical tree impulse voltage TEMPERATURE FREQUENCY growth rate
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基于FSR嵌入的智能泡沫在气动夹爪的应用 被引量:1
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作者 吴凡 李东亚 +3 位作者 杨文振 徐嘉文 刘禹 芦艾 《传感器与微系统》 CSCD 北大核心 2024年第1期165-168,共4页
如何控制工业夹爪对易损物体的夹持力是一件具有挑战的任务,通常是利用有着力传感器的电动夹爪进行反馈控制,但这种方法昂贵且额外增加了夹爪的复杂程度。基于直书写3D打印,设计了一种内嵌力敏电阻器(FSR)的智能硅橡胶泡沫,安装在气动... 如何控制工业夹爪对易损物体的夹持力是一件具有挑战的任务,通常是利用有着力传感器的电动夹爪进行反馈控制,但这种方法昂贵且额外增加了夹爪的复杂程度。基于直书写3D打印,设计了一种内嵌力敏电阻器(FSR)的智能硅橡胶泡沫,安装在气动夹爪的指尖,不仅能监测夹持状态,还能在气压超过阈值后一定范围内,保持夹持力的恒定,以保护物体。实验结果表明:智能泡沫在4~12 N的工作范围内,误差不超过1.5N。当气压在450~560kPa范围内,能维持夹持力约14.6N。 展开更多
关键词 直书写 气动夹爪 硅橡胶 应力平台区 恒力 力敏电阻器
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Influence of Blending Temperature on Fluorescence Properties of Silicone Rubber Matrix Eu(TTA)_2(phen)(MA) Composites 被引量:3
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作者 吴小飞 刘力 +3 位作者 张婉 胡水 金日光 张立群 《Journal of Rare Earths》 SCIE EI CAS CSCD 2006年第z2期61-63,共3页
A series of fluorescent composites were prepared by blending silicone rubber with Eu(TTA )2(phen)(MA). The influence of mechanical blending temperature on fluorescent intensity of composites and dispersion of rare ear... A series of fluorescent composites were prepared by blending silicone rubber with Eu(TTA )2(phen)(MA). The influence of mechanical blending temperature on fluorescent intensity of composites and dispersion of rare earth complexes in the SiR matrix were investigated. As for the cured rubber, it is found that its fluorescent intensity is relatively low compared with that of uncured rubber. Low temperature is beneficial to dispersion of Eu(TTA )2(phen)(MA) homogeneously. When the amount of rare earth complexes is low, the fluorescent intensity of composites prepared by mechanical blending method above melting point of Eu(TTA )2(phen)(MA) is much higher than that of composites prepared below melting point. 展开更多
关键词 rare earth complex mechanical blending temperature fluorescence property silicon rubber
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PREPARATION OF HIGH-TEMPERATURE VULCANIZED SILICONE RUBBER OF EXCELLENT MECHANICAL AND OPTICAL PROPERTIES USING HYDROPHOBIC NANO SILICA SOL AS REINFORCEMENT 被引量:2
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作者 傅强 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2008年第4期495-500,共6页
Hydrophobic nano silica sol(HNSS)was incorporated into polyvinylmethylsiloxane to prepare reinforced high- temperature vulcanized(HTV)silicone rubber.HTV silicone rubber filled with 40 phr HNSS showed excellent mechan... Hydrophobic nano silica sol(HNSS)was incorporated into polyvinylmethylsiloxane to prepare reinforced high- temperature vulcanized(HTV)silicone rubber.HTV silicone rubber filled with 40 phr HNSS showed excellent mechanical and optical properties:the tensile strength reached 11.7 MPa and the optical transmittance was higher than 90%.Possible reasons for reinforcement and transparency were discussed on the basis of the bound rubber percentage,total crosslink density,and SEM analysis.Our work suggests that HNSS... 展开更多
关键词 HTV silicone rubber REINFORCEMENT TRANSPARENCY HNSS Air-bubbles
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HYDROPHOBICITY OF CONTAMINATED SILICONE RUBBER SURFACES 被引量:2
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作者 Zhi-min Zheng Cai-hong Xu +3 位作者 Jian Jiang Chang-yu Ren Wei Gao Ze-min Xie Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2002年第6期559-564,共6页
Silicone rubber (SIR) shows superior performance when used outdoors, but its surface can be transformed from inherently hydrophobic to hydrophilic by the adsorption of contaminants. Al(OH)(3), Al2O3, quartz powder and... Silicone rubber (SIR) shows superior performance when used outdoors, but its surface can be transformed from inherently hydrophobic to hydrophilic by the adsorption of contaminants. Al(OH)(3), Al2O3, quartz powder and active carbon were selected as authentic contaminants. Hydrophobicity of the surface was determined using contact angle measurement. The results indicate that the adsorbability of the contaminants can strongly affect the hydrophobicity of contaminated SIR surface. The increasing rate of contact angle of specimens contaminated by Al(OH)(3) was much faster than that by Al2O3 and quartz due to the adsorption of migrated low molecular weight (LMW) polydimethylsiloxanes. Specimens contaminated by active carbon could achieve surface hydrophobicity within 15 min because active carbon has high adsorbability. Surfaces of contaminated ultrapure SIR, polytetrafluoroethylene (PTFE) and glass remain hydrophilic because they contain no mobile LMW components. The addition of oligomeric polydimethylsiloxanes has little effect on the hydrophobicity of contaminants covered on SIR surface. 展开更多
关键词 HYDROPHOBICITY silicone rubber contact angle CONTAMINATION
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Preparation and characterization of iron-ore-imbedded silicone rubber materials for radiation protection 被引量:2
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作者 Bulent Buyuk 《Nuclear Science and Techniques》 SCIE CAS CSCD 2018年第9期230-235,共6页
Iron-ore-imbedded silicone rubber materials were produced for radiation shielding. Samples were tested against a Co-60 gamma source, which is widely used in nuclear technology and medicine. Decreasing the particle siz... Iron-ore-imbedded silicone rubber materials were produced for radiation shielding. Samples were tested against a Co-60 gamma source, which is widely used in nuclear technology and medicine. Decreasing the particle size of iron ore resulted in better gamma radiation protection owing to more homogenous distribution. In addition, the materials had flexible properties up to the addition of 60 wt% iron ore content. Further, 0.5 mm Pb E gamma protection was provided by using 2.06-mm-thick SDT-60 as the Co-60 source. Iron ore–silicone rubber composites are candidate materials for lead-free flexible radiation protection systems owing to their relatively inexpensive and easy production. 展开更多
关键词 Iron ORE silicone rubber Radiation SHIELDING Co-60 LEAD-FREE flexible materials Linear attenuation COEFFICIENTS
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DAMAGE OF SILICONE RUBBER INDUCED BY PROTON IRRADIATION 被引量:2
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作者 张丽新 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2003年第5期563-567,共5页
In this paper, the damage to methyl silicone rubber induced by irradiation with protons of 150 keV energy wasstudied. The surface morphology, tensile strength, Shore hardness, cross-linking density and glass transitio... In this paper, the damage to methyl silicone rubber induced by irradiation with protons of 150 keV energy wasstudied. The surface morphology, tensile strength, Shore hardness, cross-linking density and glass transition temperaturewere examined. Positron annihilation lifetime spectrum analysis (PALS) was perfomed to reveal the damage mechanisms ofthe rubber. The results showed that tensile strength and Shore hardness of the rubber increased first and then decreased withincreasing irradiation fluence. The PALS characteristics τ_3 and I_3, as well as the free volume V_f, decreased with increasingirradiation fluence up to 10^(15) cm^(-2), and then increased slowly. It indicates that proton irradiation causes a decrease of freevolume in the methyl silicone rubber when the fluence is less than 10^(15)cm^(-2), while the free volume increases when thefluence is greater than 10^(15)cm^(-2). The results on cross-linking density indicate that the cross-linking induced by protonirradiation is dominant at smaller proton fluences, increasing the tensile strength and Shore hardness of the rubber, while thedegradation of rubber dominates at greater fluence, leading to a decrease of tensile strength and Shore hardness. 展开更多
关键词 silicone rubber Proton irradiation Tensile strength Positron annihilation lifetime spectrum Free volume
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EFFECTS OF SOME PHENYLETHYNYLSILICON COMPOUNDS ON HEAT-CURABLE SILICONE RUBBER Ⅲ 1, 1, 3, 3-TETRAMETHYL-1, 3-DIPHENYLETHYNYL-DISILOXANE 被引量:3
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作者 冯圣玉 于淑岐 +3 位作者 李世军 张圣有 陈剑华 杜作栋 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 1995年第3期228-234,共7页
We have shown that some phenylethynylsilicon compounds are good cure crosslinkersof heat-curable silicone rubber(HCSR). In this paper the effects of 1, 1, 3, 3-tetramethyl-1, 3-diphenylethynyldisiloxane (TMDPDS) as a ... We have shown that some phenylethynylsilicon compounds are good cure crosslinkersof heat-curable silicone rubber(HCSR). In this paper the effects of 1, 1, 3, 3-tetramethyl-1, 3-diphenylethynyldisiloxane (TMDPDS) as a crosslinker on HCSR were studied. Thevulcanizates with fine mechanical properties could be obtained with suitable amounts ofTMDPDS. Sol fractions, and crosslinking density of vulcanizates and vulcanizationretardation effect of TMDPDS on hydrosilation curing silicone rubber were also discussed. 展开更多
关键词 silicone rubber 1 1 3 3-Tetramethyl-1 3-diphenylethynyl disiloxane Vulcanization retardation effect Heat cure
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AN EVA/UNMODIFIED NANO-MAGNESIUM HYDROXIDE/SILICONE RUBBER NANOCOMPOSITE WITH SYNERGISTIC FLAME RETARDANCY 被引量:1
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作者 乔金樑 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2007年第5期437-440,共4页
A novel EVA/unmodified nano-magnesium hydroxide (NMH)/silicone rubber ternary nanocomposite was prepared by using a special compound flame retardant of NMH and silicone rubber (CFR). The flammability of the ternar... A novel EVA/unmodified nano-magnesium hydroxide (NMH)/silicone rubber ternary nanocomposite was prepared by using a special compound flame retardant of NMH and silicone rubber (CFR). The flammability of the ternary composite was studied by cone calorimeter test (CCT). Synergistic effect on flame retardancy was found between silicone rubber and NMH. EVA/CFR ternary nanocomposite showed the lowest peak heat release rate (PHRR) and mass loss rate (MLR) among the samples of virgin EVA, EVA composites. The synergistic flame retardancy of silicone rubber and NMH in EVA system is attributed to the enhanced char layers in the condensed phase that prevents the heat and mass transfer in the fire. 展开更多
关键词 EVA Nano-magnesium hydroxide silicone rubber Flame retardancy.
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Thermal Oxidative Degradation and Ageing Performance of Silicone Rubber Filled with Attapulgite 被引量:2
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作者 Hua-hua Zhao Huan-ling Song +3 位作者 Xin-yao Tao Ge-xin Chen Ai-qin Wang Ling-jun Chou 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2021年第3期309-322,I0048,共15页
The natural attapulgite(NAPT)was disaggregated by high-pressure homogenization technology combined with extrusion process to prepare the attapulgite with disaggregated rod crystal bundles(DAPT)and large specific surfa... The natural attapulgite(NAPT)was disaggregated by high-pressure homogenization technology combined with extrusion process to prepare the attapulgite with disaggregated rod crystal bundles(DAPT)and large specific surface area of 133.7 m^(2)/g.NAPT and DAPT were incorporated into the silicone rubber to obtain the composite NAPTSR and DAPT-SR by mechanical blending method,respectively.After thermal oxidative ageing at 300℃ for 0.5 h,temperature for the 5%weight loss increased greatly from 385℃ of the neat silicone rubber to 396-399℃ with addition of NAPT and DAPT.NAPT and DAPT enhanced the interaction between the filler nanoparticles and rubber matrix thus inhibited the nanoparticle agglomeration.The conservation rate of the side methyl group in NAPT-SR and DAPT-SR was greatly improved after ageing.Therefore,the thermal oxidative degradation and ageing performance of the silicone rubber composites was significantly reinforced.Moreover,DAPT could greatly restrain the growth of nanoparticles after ageing.Therefore,DAPT-SR showed the better retention of tensile strength(40.6%),elongation at break(34.9%)and tear strength(30.1%)compared with the corresponding mechanical properties of the neat silicone rubber(10.6%,7.4%,and 5.0%)after ageing. 展开更多
关键词 silicone rubber ATTAPULGITE COMPOSITES Thermal oxidative degradation Ageing
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The Dynamic Characteristics of Silicone Rubber Isolator 被引量:1
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作者 YU Lianjiang LIU Suling +2 位作者 YE Linming HUANG Guangsu XU Yuntao 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2012年第1期130-133,共4页
The dynamic stiffness and the specific damping energy, as well as the vibration response characteristics of a silicone rubber isolator were researched. The results of the vibration test showed that the silicone rubber... The dynamic stiffness and the specific damping energy, as well as the vibration response characteristics of a silicone rubber isolator were researched. The results of the vibration test showed that the silicone rubber isolator was excellent in the performance of vibration control. The dynamic stiffness and the damping characteristics were non-linear. From the comparison between experimental results and simulation analysis, the displacement transmissibility characteristics of the isolator were obtained. As a result, the dynamic characteristics of the isolator could be accurately described by the quadratic type non-linear terms at small amolitude. 展开更多
关键词 silicone rubber ISOLATOR dynamic characteristics vibration control
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Damage Effect of Space Proton Irradiation with the Low Energy of 50-200 keV on Methyl Silicone Rubber 被引量:1
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作者 LixinZHANG ChengminWANG ShiyuHE 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2004年第6期751-754,共4页
The damage effects and mechanisms of proton irradiation with 50-200 keV energy to space-grade methyl silicone rubber was performed using a ground-based simulator for space irradiation environment. The changes in surfa... The damage effects and mechanisms of proton irradiation with 50-200 keV energy to space-grade methyl silicone rubber was performed using a ground-based simulator for space irradiation environment. The changes in surface morphology, mechanicai properties, cross-linking density, glass temperature, infrared attenuated total reflection spectrum, mass spectrum and pyrolysis gas chromatography-mass spectrum indicated that, under lower energy, the proton irradiation would induce cross-linking effect, resulting in an increase in tensile strengths and hardness of the methyl silicon rubber. However, after the irradiation of protons for more than 150 keV, the irradiation induced degradation, which decreased the tensile strengths and hardness, became a dominant effect. A macromolecular network destruction modei for the silicone rubber radiated vvith the protons was proposed. 展开更多
关键词 Methyl silicone rubber Proton irradiation Tensile strength Infrared spectrum Damage mechanism
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充油电缆终端用PIB与SR/EP的相容性研究
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作者 魏亚军 张雨利 +3 位作者 邱雨 许磊 于永进 李长云 《高压电器》 CAS CSCD 北大核心 2024年第5期164-170,共7页
高压充油电缆终端中既有硅橡胶(SR)、三元乙丙橡胶(EP)和绝缘自粘带等固体介质,也有二甲基硅油或聚异丁烯(PIB)等液体介质,液固介质的相容性直接关系到高压充油电缆终端的绝缘性能的稳定性以及工作的可靠性。文中首先在120℃下开展了16... 高压充油电缆终端中既有硅橡胶(SR)、三元乙丙橡胶(EP)和绝缘自粘带等固体介质,也有二甲基硅油或聚异丁烯(PIB)等液体介质,液固介质的相容性直接关系到高压充油电缆终端的绝缘性能的稳定性以及工作的可靠性。文中首先在120℃下开展了168 h的PIB与SR和EP的相容性试验,接着测量了液固介质的理化性能与电气性能指标,根据不同老化时间下液固介质,以及相同老化时间下不同液固介质组合之间理化和电气性能的变化特征,并结合电介质性能指标的物理含义,综合比较后得到PIB和SR的相容性优于PIB与EP的相容性。为明确PIB与SR和EP的相容性机理,文中进一步采用Materials Studio软件,构建了液固介质的分子模型及界面结构,利用分子动力学获得了不同温度下PIB-SR界面和PIB-EP界面的焓值;计算表明,在温度由363 K升高到393 K时,PIB-EP界面的焓变小于0,有溶解趋势,而PIB-SR界面的焓变值大于0,因此,PIB-SR界面较PIB-EP界面更具稳定性。文中结论可为高压充油电缆中液固介质的选择提供理论依据。 展开更多
关键词 聚异丁烯 相容性试验 硅橡胶 三元乙丙橡胶 电缆终端
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Plasma jet array treatment to improve the hydrophobicity of contaminated HTV silicone rubber 被引量:4
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作者 Ruobing ZHANG Qianting HAN +1 位作者 Yan XIA Shuang LI 《Plasma Science and Technology》 SCIE EI CAS CSCD 2017年第10期75-82,共8页
An atmospheric-pressure plasma jet array specially designed for HTV silicone rubber treatment is reported in this paper. Stable plasma containing highly energetic active particles was uniformly generated in the plasma... An atmospheric-pressure plasma jet array specially designed for HTV silicone rubber treatment is reported in this paper. Stable plasma containing highly energetic active particles was uniformly generated in the plasma jet array. The discharge pattern was affected by the applied voltage. The divergence phenomenon was observed at low gas flow rate and abated when the flow rate increased.Temperature of the plasma plume is close to room temperature which makes it feasible for temperature-sensitive material treatment. Hydrophobicity of contaminated HTV silicone rubber was significantly improved after quick exposure of the plasma jet array, and the effective treatment area reached 120 mm?×?50 mm(length?×?width). Reactive particles in the plasma accelerate accumulation of the hydrophobic molecules, namely low molecular weight silicone chains, on the contaminated surface, which result in a hydrophobicity improvement of the HTV silicone rubber. 展开更多
关键词 atmospheric-pressure plasma jet plasma jet array hydrophobicity HTV silicone rubber
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