Abstract

By determining the molecular mass of pitch from heavy pirolysis tar, additional information may be obtained regarding the thermal polycondensation and quality of pitch. The weighted mean molecular mass of toluene-soluble components of the pirolysis pitch is determined by gel-permeation chromatography. The molecular mass of the components in specific petroleum-pitch fractions is studied as a function of the time and temperature employed in isothermal holding of the heavy pirolysis tar. The weighted mean molecular mass of toluene-soluble components depends on the heat treatment of the pirolysis tar and the softening temperature of the petroleum pitch.

中文翻译：

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重质热解焦油热分解缩聚反应中沥青分子量的变化

摘要

通过确定重质裂解沥青的沥青分子量，可以获得有关热缩聚和沥青质量的其他信息。裂解溶液的甲苯可溶成分的加权平均分子量通过凝胶渗透色谱法测定。研究了特定石油沥青馏分中各组分的分子量，作为重热解焦油的等温保持所用时间和温度的函数。甲苯可溶组分的加权平均分子量取决于热解焦油的热处理和石油沥青的软化温度。