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Influence Of Heat And Pressure Treatment On The Theological Behavior Of Petroleum Pitches

机译：热处理和高压处理对石油沥青流变行为的影响

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摘要

Pitch Theological properties are extremely important during the manufacturing process of carbon materials, in mesophase formation, and with regard to the final properties of the carbon products. In this work, pitch samples have been prepared from three different FCC decant oils by heat-treatment, under 0.9 MPa pressure, in a reactor at 390 ℃, 410 ℃, and 430 ℃. These samples were analyzed in a rotational rheometer using a parallel-plate sensor. The rheometric softening points matched the results obtained using conventional equipment and exponential relationships were found to exist between these softening points and the pitch viscosity when the former approached 180 ℃. The quinoline-insoluble content (QI) has been shown to be more important in increasing the pitch viscosity than the toluene-insoluble content (TI). Oscillatory rheometry analysis has shown that an elastic response is not always found in creep and recovery tests, even when the elastic modulus G' is dominant over the viscous modulus G". Pitch elasticity was found to be independent of the mesophase, and this pitch property was either only observed when the cross-over point occurred at very high frequencies or did not occur at all within the frequency range studied.
机译：在碳材料的制造过程中，中间相的形成以及碳产品的最终性能方面，沥青的流变学特性极为重要。在这项工作中，沥青样品是通过在390℃，410℃和430℃的反应器中于0.9 MPa压力下通过热处理从三种不同的FCC倾析油制备的。使用平行板传感器在旋转流变仪中分析这些样品。流变软化点与使用常规设备获得的结果相符，并且当前者接近180℃时，发现这些软化点与沥青粘度之间存在指数关系。已显示，在提高沥青粘度方面，喹啉不溶物（QI）比甲苯不溶物（TI）更重要。振荡流变分析表明，即使在弹性模量G'超过粘性模量G“的情况下，蠕变和恢复测试也未总是发现弹性响应。发现沥青的弹性与中间相无关，并且该沥青的性质仅当交叉点出现在非常高的频率时才观察到，或者在研究的频率范围内根本没有发生时才观察到。

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