共查询到15条相似文献,搜索用时 62 毫秒
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环氧化天然橡胶的研究进展 总被引:3,自引:0,他引:3
天然橡胶(NR)作为一种植物合成的可再生资源,与由石油生产的合成橡胶相比,更能满足当今世界普遍追求可持续发展的需要。NR的环氧化改性具有操作简单、方法经济、反应可在水相中进行的特点,制备得到的环氧化天然橡胶(ENR)具有良好的相容性、抗湿滑性、低的滚动阻力、耐油性和气密性等特点,在轮胎工业、胶粘剂和新型复合材料等领域中有着广泛的应用前景。本文对近年来ENR制备和表征方法、ENR与白炭黑之间的相互作用、ENR的硫化及其在轮胎胶料中的应用等方面的最新进展进行了综述,并对今后的研究方向提出了建议。 相似文献
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用FTIR研究环氧化天然橡胶的热老化 总被引:8,自引:0,他引:8
与天然橡胶(NR)相比,环氧化天然橡胶(ENR)具有良好的耐油性和气密性[1,2],并由于环氧基团而有一定的极性,同其它高聚物的相容性较好.通过环氧基团的二次反应,ENR分子链可接上其它的功能团,满足一些特殊的用途[3,4].对于ENR的力学性能、共... 相似文献
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涂层阳极电氧化合成环氧环己烷 总被引:6,自引:0,他引:6
用廉价的涂层电极作为阳极,在H2O-NaBr-MeCN(MeCN:H2O=1:4)介质中,电流密度控制在0.4A/dm^2左右,由环己烯电化学氧化合成环氧环己烷,产率82.6%。 相似文献
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环氧天然橡胶接枝高分散白炭黑增强天然橡胶复合材料的制备及表征 总被引:1,自引:0,他引:1
基于白炭黑表面硅羟基与环氧基团的可反应性,利用Haake流变仪的高温高剪切作用,在170℃下,实现了环氧天然橡胶(ENR)对白炭黑的固态原位接枝,制备出一种高分散疏水型白炭黑.探讨了白炭黑和ENR的反应配比对增强性能的影响,确定合适的反应比例为3∶1.FTIR、TGA和TEM的分析结果证实了ENR被接枝到白炭黑表面上.对比研究了接枝前、后白炭黑对增强天然橡胶(NR)复合材料性能的影响,测试结果表明接枝白炭黑在天然橡胶中具有良好的分散性并能明显改善对天然橡胶的增强效果;接枝于白炭黑表面上的环氧天然橡胶分子玻璃化转变向高温偏移,使该复合材料在常温下具备优异力学性能的同时也体现出了高动态滞后的特点. 相似文献
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Silica is a popular filler, but in epoxidized natural rubber, can act as a cross-linking agent. Unfortunately, a high amount of silica is necessary to obtain satisfactory tensile strength. Moreover, a high amount of silica in ENR/silica hybrids is associated with low elongation at break. In our paper, we propose natural phenolic compounds, including quercetin, tannic acid, and gallic acid as natural and safe additional crosslinkers dedicated to ENR/silica hybrids to obtain bio-elastomers with improved mechanical properties. Therefore, toxic crosslinkers, such as peroxides or harmful accelerators can be eliminated. The impact of selected natural phenolic compounds on crosslinking effect, mechanical properties, color, and chemical structure of ENR/silica composite have been analyzed. The obtained results indicated that only 3 phr of selected natural phenolic compounds is able to improve crosslinking effect as well as mechanical properties of ENR/silica hybrids. Moreover, some of the prepared materials tend to regain mechanical properties after reprocessing. Such materials containing only natural and safe ingredients have a chance of becoming novel elastomeric biomaterials dedicated to biomedical applications. 相似文献
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环氧化天然橡胶;丁苯橡胶;聚合物电解质;锂离子电池;交流阻抗 相似文献
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Epoxidized natural rubbers (ENRs) with different extents of epoxidation (B) were prepared under various reaction conditions. The effects of the amount of H2O2 and the reaction time on B are discussed. The glass transition temperature Tg, the thermal degradation temperature and the activation energy of thermal degradation of the ENRs increase with B. The results indicate that the thermal stability of the ENRs increases with B.This revised version was published online in November 2005 with corrections to the Cover Date. 相似文献
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