共查询到15条相似文献,搜索用时 78 毫秒
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啮合型密炼机在混炼含白发黑的轮胎胶料时,可精确地控制胶料温度、减少混炼段数,从而使白炭黑胶料的混炼工艺变得更加可行。 相似文献
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研究GK270N型密炼机混炼排胶温度及氧化锌、防老剂加入顺序对白炭黑胶料密炼工艺性能、硫化特性及物理性能的影响。结果表明,排胶温度为160℃时混炼效果好;氧化锌在一段加入,混炼胶门尼粘度降低明显,定伸应力和抗撕裂性能较好;防老剂在一段加入,混炼胶工艺性能及其硫化胶物理性能最差。 相似文献
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综述了混炼机类型对白炭黑一硅烷混炼加工性能的影响。通过使用现有硅烷如Si69与新型硅烷VP Si363的胶料对比,证明新型硅烷VP Si363的胶料其加工性能在很大程度上取决于可用的混炼设备;对于啮合型转子捏合机和切线型转子捏合机,其整体加工行为与性能必须保持平衡,从而实现VP Si363胶料的最佳结果。 相似文献
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通过实验考察了不同的密炼机和密炼机调整对白炭黑胶料硅烷化过程效率的影响,发现密炼机常压模式混炼、优化转子设计以及空气注入等可提高硅烷化的效率. 相似文献
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将干冰用于氧化石墨烯(GO)/白炭黑/天然胶乳(NRL)的混合乳液中,利用干冰气化产生的大量气泡破裂而形成的能量对填料聚集体的破碎作用,提高填料在NRL中的分散性,研究干冰用量对GO/白炭黑/天然橡胶(NR)复合材料性能的影响。结果表明:干冰用量较小时,随着干冰用量的增大,复合材料的Payne效应减弱,交联密度增大,物理性能提高,滚动阻力降低;干冰用量较大时,复合材料的Payne效应增强,交联密度减小,物理性能下降,滚动阻力提高;干冰用量为20份时,复合材料的物理性能最佳。 相似文献
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Yoshihiro Nakamura Rieko Kobayashi Masayoshi Matsui Jun-ichi Ozaki 《Chemical engineering journal (Lausanne, Switzerland : 1996)》2009,155(1-2):493-498
This study examined the influence of different types of silane coupling agents on the dispersion of nanosilica particles with diameters of ca. 10 nm and 25 nm in two organic solvents, methylisobutylketone (MIBK) and cyclohexanone (CXN). The nanosilicas were prepared by the sol–gel process, and the following coupling agents were used: 3-glycidylpropyltrimethoxysilane (EpoSi), N-phenyl-3-aminopropyltrimethoxysilane (AmiSi), 3-mercaptopropyltrimethoxysilane (MerSi), and alkyltrimethoxysilane (AlkSi). While the 25-nm silica particles displayed dispersibility similar to that of submicron silica particles (ca. 150 nm and 250 nm), the dispersibility of the 10-nm silica particles proved to be dependent on the combinations of the agents and solvents; for example, EpoSi and MerSi were found to be suitable agents for MIBK and CXN, respectively. The slurries were also subjected to heating at 40 °C for 24 h, which resulted in a considerably higher stability of the dispersion state when CXN was employed as the solvent, regardless of which silica coupling agents were used. FTIR measurement revealed the presence of unreacted free Si–OH at 3740 cm−1 for some nanosilicas. Combustion of the organic moieties introduced onto the silica surfaces also proved that the amount of organic groups present in a unit surface area of the nanosilicas were only 1/3 or 1/2 of that found on submicron silicas. From these observations, the low dispersibility of the nanosilicas was inferred to be due to the imperfect coverage of the silanol groups by the silane coupling agents. 相似文献
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介绍轮胎模具清洗新技术——激光和干冰清洗技术的工作原理、技术特点和应用。激光清洗通过控制能量密度和波长等激光工艺参数,不损伤模具,清除的废料可回收,清洗过程实现自动化控制,劳动强度小,清洗效率高,且清洗设备使用寿命长,运行成本低,尽管首期投资大,但推广应用前景广阔。干冰清洗技术在轮胎模具上已成功应用,可以直接清洗硫化后的高温模具,不损伤模具,不污染环境,不留下任何残留物,且可以清洗细小排气孔,但运行成本高,噪声和劳动强度大。 相似文献
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Andrzej Machocki 《Catalysis Letters》1994,26(1-2):85-93
The presented results of methane oxidative coupling indicate that the lowering of the reaction temperature below 700°C, without any loss of its effectiveness, requires a much longer contact time than the times applied in a great majority of studies reported so far. 相似文献