中间相沥青纤维稳定化过程中的氧化动力学计算  

The Calculation of Oxidation Kinetics in Mesophase Pitch Fibers During Oxidative Stabilization

作　　者：孙祝林 吕永根[1] 杨常玲 刘越 Sun Zhulin;LüYonggen;Yang Changling;Liu Yue(College of Materials Science and Engineering,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Chemistry,Chemical Engineering and Biotechnology,Donghua University,Shanghai 201620,China;Jining Kenon New Carbon Materials Science and Technology Limited Company,Jining,Shandong 272000,China)

机构地区：[1]东华大学材料科学与工程学院纤维材料改性国家重点实验室化学化工与生物工程学院,上海201620 [2]济宁科能新型碳材料科技有限公司,山东济宁272000

出　　处：《化学世界》2021年第6期364-372,共9页Chemical World

基　　金：国家自然科学基金面上(No.51672042)资助项目。

摘　　要：为了定量测算稳定化中间相沥青纤维(MPPF)的交联程度,采用差示扫描量热法(DSC)对不同温度下MPPF恒温氧化稳定化过程中的热流随时间的变化进行测试。通过氧化反应和交联反应的连串反应机制对MPPF的恒温DSC曲线进行定量分析。计算结果表明,MPPF氧化稳定化过程中氧化反应和交联反应的活化能分别为59和67kJ·mol^(-1)。气相色谱—质谱(GC-MS)分析表明,交联反应生成的气体包含CO、H_(2)O、CO_(2),CO、H_(2)O、CO_(2)的反应的活化能分别为29、80、135kJ·mol^(-1)。通过该方法,可以进一步了解MPPF氧化稳定化的机制,有助于更加准确和适当地控制其交联程度。In order to measure the degree of crosslinking of mesophase pitch fiber(MPPF)quantitatively.The isothermal heat flux measured by differential scanning calorimetry(DSC)are quantificationally analyzed using the consecutive reactions of oxidation and crosslinking.The results show that the activation energies of oxidation and crosslinking are 59and 67kJ·mol^(-1) respectively.Gas chromatography-mass spectrometry(GC-MS)analysis shows that the crosslinking reactions involves release of CO,H_(2)O and CO_(2).The activation energies for the three kinds of reactions are 29,80and 135kJ·mol^(-1) respectively.Whereupon,the mechanism of oxidative stabilization of mesophase pitch fiber can be understood clearly,and the degree of crosslinking can be controlled more appropriately.

关 键 词：中间相沥青 纤维 动力学 氧化 交联 化学反应 差示扫描量热法(DSC) 

分 类 号：TQ34[化学工程—化纤工业]