交联剂对热聚合改性煤沥青性能的影响.docVIP

交联剂对热聚合改性煤沥青性能的影响 摘要：煤沥青具有资源丰富、价格低廉等优点。但其残炭率低，可以通过改性来提高其残炭率。在尝试和总结之前学者的研究基础上，设计新的改性剂和配方工艺，以催化氢化的方法将煤沥青原料合成成为具有各向异性的中间相结构，实现中间相沥青的催化合成，并对产物进行检测和表征，为中间相沥青的静电纺丝提供性能和结构都合适的前驱体。以交联剂（本论文分别采用了三聚甲醛、甲醛、对羟基苯甲醛、硫磺和聚甲醛）为改性剂，分别在三氯化铝和对甲苯磺酸的作用下对煤沥青进行了改性研究。采用电磁搅拌加热器对原料沥青进行加热熔化和改性；采用马弗炉测量改性后煤沥青的结焦值。结果表明，改性后的煤沥青出现了各向异性的中间相结构，结焦值也得到了一定的提高。因此，改性后的煤沥青有望作为优质的碳材料基体前驱体。8385 关键字：改性剂、煤沥青、结焦值、中间相沥青 The influence of Crosslinker on properties of coal tar pitch modified by thermal polymerization Abstract: Coal tar has the advantages of abundant resources, low price, etc. It has low carbon residue, but can be improved by modified. On the basis of try and summarize the research of previous scholars, designed of the new modifiers and formulation process . In the way of catalytic hydrogenation , make coal pitch synthesis to haveanisotropic mesosphere structure ,then detection and characterization of the product. To provide both performance and structure suitable precursor for electrostatic spinning of mesophase pitch. Take crosslinking(This paper uses trioxane, formaldehyde, p-hydroxybenzaldehyde, sulfur and POM) as modifier, in the action each of Aluminum trichloride and P-toluenesulfonic acid, take some research of coal tar modification. Using electromagnetic stirring heater for heating the raw material melting and modified bitumen, and using muffle furnace measured coking value of modified coal pitch. The results show that modified coal tar pitch appeared anisotropic mesophase structure, and the coking value has also been improved to some extent. Therefore, modified coal tar pitch is expected as a high-quality carbon material matrix precursor. 2.5分析15 2.6理论论证15 3.结果与讨论17 3.1黏度与结焦值17 3.2催化剂对反应的影响17 3.3反应温度对实验结果的影响17 3.4聚甲醛的用量对反应的影响17 4.结语19 谢词20 参考文献21 1.绪论 1.1概述 1.2.1研究意义 中间相沥青的黏度与温度有密切关系，同一种中间相沥青的黏度随温度升高明显下降。中间相沥青主要用于制备中间相沥青碳纤维，还可以用于制备针状焦[11]，以及碳-碳复合材料的基体材料和提取中间相碳微球等，利用中间相沥青制得的沥青碳纤维具有很高的弹性模量，因此中间相沥青作为一种新材料，具有广阔的发展前景。 1.2.2研究目的 由于煤沥青具有含碳量高、价格低廉的优点，广泛用作炼钢用人造石墨电极和炼铝用石墨阳极等成型碳材料制品的黏结剂，以及炭／炭复合