共查询到18条相似文献,搜索用时 78 毫秒
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采用顺丁橡胶(BR)部分替代天然橡胶(NR)用于中长途载重轮胎胎面中,研究NR/BR并用比对胶料硫化特性、物理性能和动态性能的影响.结果表明:当BR用量大于20份时,硫化胶耐裂口增长性能急剧下降;当NR/BR并用比为80/20时,并用胶综合物理性能、动态性能和耐磨性能均较好,适用于载重轮胎胎面. 相似文献
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研究5种炭黑(RX2007,NC1301,NC1312,BC2109,N234)填充的天然橡胶(NR)/顺丁橡胶(BR)并用胶的性能。结果表明:炭黑RX2007填充的NR/BR并用胶的t90最短,炭黑NC1312填充的NR/BR并用胶的t90最长;炭黑BC2109和N234填充的NR/BR并用胶的定伸应力、拉伸强度和撕裂强度较大;炭黑RX2007填充的NR/BR并用胶的动态力学性能最优;炭黑RX2007和N234填充的NR/BR并用胶的耐压缩疲劳生热性能较优;炭黑NC1312填充的NR/BR并用胶的耐磨性能最佳;5种炭黑在NR/BR基体中均分散良好,炭黑各项物性综合决定炭黑填充的NR/BR并用胶的各项性能。 相似文献
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采用动态力学分析(DMA)和电子显微镜等方法研究炭黑N550在低硬度天然橡胶(NR)/顺丁橡胶(BR)(用量比50/50)并用胶中的偏析行为,并考察混炼工艺对炭黑偏析的影响。结果表明,损耗因子峰高随炭黑用量的增大而线性下降,可用来定量表征炭黑在橡胶中的含量。当NR与BR的门尼粘度接近时,NR/BR并用胶的DMA温度谱图中出现2个玻璃化温度峰,且峰温与NR和BR一致,表明NR与BR以50/50并用时是不相容的。炭黑N550更易偏析在BR相中,采用NR+炭黑混炼工艺时,炭黑的分布最均匀,偏析最弱。 相似文献
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采用低相对分子质量的液体环氧树脂(EP)与固化剂混合作为增强体的前驱体,比较了其填充天然橡胶(NR)、顺丁橡胶(BR)及两者并用胶的物理机械性能,考察了EP用量对并用胶及炭黑增强并用胶物理机械性能的影响,并通过扫描电子显微镜表征了填充后的NR、BR及并用胶的微观相态结构。结果表明,EP的加入均可提高NR、BR、NR/BR并用胶的物理机械性能,其中并用胶的拉伸强度提高幅度最大;当EP用量约为24份时,NR/BR并用胶的综合性能最佳;EP可以提高炭黑增强NR/BR并用胶的物理机械性能,但提高幅度不大;EP在NR/BR并用胶中呈现规整的圆球形状,直径为1.0~2.5μm。 相似文献
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研究温度对纯胶发动机悬置和液封发动机悬置性能的影响、生胶和软化剂对硫化胶耐低温性能的影响以及耐低温改进配方胶料发动机悬置刚度变化。结果表明:随着温度的降低,纯胶发动机悬置和液封发动机悬置的刚度增大,液封发动机悬置阻尼特性频率段阻尼角减小;采用天然橡胶/顺丁橡胶并用胶、低倾点软化剂可改善硫化胶低温性能,提高发动机悬置的耐低温稳定性。 相似文献
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研究炭黑在天然橡胶(NR)/顺丁橡胶(BR)并用胶中分布对并用胶性能的影响。结果表明:BR中炭黑的质量分数增大,NR/BR并用胶硫化胶的定伸应力、拉伸强度和拉断伸长率增大,耐磨性能提高,压缩生热和动态损耗因子减小,抗裂口增长性能变差;NR中炭黑的质量分数增大,NR/BR并用胶硫化胶的耐屈挠性能增强。 相似文献
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Natural rubber (NR)/Acrylonitrile butadiene rubber (NBR) blend membranes, prepared by using dicumyl peroxide as the crosslinking agent, were tested for their vapor permeation characteristics. The permeation studies were conducted using three chlorinated hydrocarbons, viz. dichloro methane, chloroform, and carbon tetrachloride. The effects of the blend ratio, compatibilizer, penetrant size, and temperature on the vapor permeability of the membranes were investigated. The permeability of the blends was found to decrease with an increase in the NBR content, which has been attributed to the inherent solvent resistant nature of NBR. The permeation behavior of compatibilized blends was compared with those of the uncompatibilized blends. The separation efficiencies of the membranes were also tested using chloroform/acetone mixtures to complement the observations from the vapor permeation experiments. 相似文献
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研究树脂硫化体系在溴化丁基橡胶(BIIR)/再生丁基橡胶(RIIR)/天然橡胶(NR)并用气密层胶中的应用。结果表明:气密层胶配方以BIIR为主体,并用50份以上的RIIR和少量的NR时,与传统硫化体系相比,树脂硫化体系可达到较好的共硫化效果,气密层胶硫化平坦性、充模流动性和物理性能优异,耐高温降解能力强;在适当减小增粘树脂用量的情况下,使用树脂硫化体系生产的胎坯内衬层部件的成型接头仍可获得良好的粘性;成品轮胎气密层气密性良好。 相似文献
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The effect of recycled acrylonitrile butadiene rubber (NBRr) content of SBR/NBRr blends on natural weathering was studied. Three different size of NBRr (S1; 117–334 µm, S2; 0.85–15.0 mm and S3; direct sheeted form) were used and the blends were exposed to natural weathering for 3 and 6 months. The results indicated that the SBR/NBRr blends with smallest size of NBRr (S1) show a better retention of tensile properties, which are able to withstand better weathering than coarser size (S2 and S3) of SBR/NBRr blends. The presence of hydroxyl, carbonyl and nitro group after exposure to natural weathering was detected in FTIR analysis, which related to the UV oxidation process of rubber blends. The scanning electron microscopy proved that the SBR/NBRr blends with smallest size of NBRr (S1) with higher content of NBRr, shows a better resistant to natural weathering. 相似文献