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在交替变更2-正丁氨基-4,6-二巯基均三嗪(硫化剂DB)和氧化镁用量的情况下,考察了二者配合硫化氯化丁基橡胶的硫化特性和物理机械性能,并进行了傅里叶变换红外光谱和热重的分析,探讨了其硫化机理。结果表明,硫化剂DB和氧化镁配合可以很好地硫化氯化丁基橡胶,做到“无锌硫化”。在氧化镁用量固定的情况下,1.0~1.5份(质量)的硫化剂DB用量比较合适;在该硫化体系中氧化镁能起到改善焦烧、延迟硫化的作用。该交联反应的特点在于烯丙基键合的氯原子参与反应,三嗪硫醇的巯基与烯丙基氯反应并脱出氯化氢,形成碳硫键交联网络,氧化镁作为酸受体参与硫化反应。 相似文献
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沸石对氯化丁基橡胶胶料及硫化胶性能的影响 总被引:1,自引:0,他引:1
在氯化丁基橡胶中加入化学工业及石油化学工业使用过的沸石(工业废料)或天然沸石,用金属硫化物代替传统配方中的金属氧化物可改善氯化丁基胶炙的工艺性能和硫化胶及制品的物理机械性能、热稳定性和化学稳定性。 相似文献
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本文主要研究了炭黑N330、N660和N990对丁基橡胶(IIR)硫化动力学的影响。研究表明,用三种不同炭黑填充的IIR其硫化反应均包含n=1级反应和n≠1级反应两个阶段。当n=1级反应时,反应速率常数K1均随着温度的升高而增大;当n≠1级反应时,反应速率常数K2则随着温度的升高而减小。同时,在硫化反应过程中活化能Ea随着炭黑粒径的增大而增大。 相似文献
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简述了国内外丁基橡胶生产技术现状,介绍了国内外丁基橡胶的生产状况,通过分析我国丁基橡胶新建/扩建项目实施和下游产品消费情况,提出了发展我国丁基橡胶的几点建议。 相似文献
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The surface of a sulfur-vulcanized synthetic styrene-butadiene rubber (SBR) was treated with ethyl acetate solutions containing different amounts of trichloroisocyanuric acid (TCI). The chlorinated SBR surfaces were characterized using contact angle measurements (water, ethane diol, n-hexadecane), infra-red (IR) spectroscopy and XPS. Chlorination produced an increase of surface free energy which was mainly due to the enhancement of the acid-base component of the surface free energy, which remained almost unchanged when the amount of TCI was increased. Depending on the amount of chlorination agent, several chemical species were present on the SBR surface: i) For low amounts of TCI (up to 2 wt%), mainly chlorinated hydrocarbon and C – O species were present on the surface; ii) For medium amounts of TCI (between 2 and 5 wt%), an excess of unreacted TCI remained on the surface and a relatively small amount of isocyanuric acid was deposited; iii) For high amounts of TCI (larger than 5 wt%), a weak boundary layer (mainly composed of isocyanuric acid) was formed on the surface and thus the effects due to chlorination were decreased. There was good agreement between the experimental results obtained with contact angle measurements and XPS because both provided information on a surface region close to 100 Å, whereas IR spectroscopy results showed deeper penetration of the chlorinating agent into the SBR surface. The estimated thickness of the chlorinated layer was near 5000 Å as estimated from XPS measurements of SBR surfaces modified by argon ion bombardment. 相似文献
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氯化橡胶的生产工艺与开发趋势 总被引:4,自引:0,他引:4
综述了氯化氯伦橡胶的特性和用途,国内外的生产状况,我国的生产技术和科研水平与国外的差距及近几年来国内外水相法氯化橡胶的研究,开发与存在的问题。 相似文献
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对中国石化燕山石化生产的丁基橡胶IIR1751,依据国家标准进行了ML(1+4)100℃、ML(1+8)100℃、ML(1+4)125℃、ML(1+8)125℃4种条件下的门尼粘度均匀性检验。方差统计结果表明:4种条件下,丁基橡胶IIR1751的门尼粘度均匀性检验的统计量F值分别为1.55、1.76、1.97、1.75,均小于临界值Fα2.31,说明丁基橡胶IIR1751在不同条件下,样品的门尼粘度均均匀。样品经过1年的稳定性考察t统计值小于t a(n-1)临界值4.30,该样品门尼粘度在1年内没有明显的变化,样品稳定。该批次样品门尼粘度均匀、稳定,能够满足门尼粘度标准物质研制的要求。 相似文献