Abstract—

We have studied the effect of polymerization-induced phase separation (PIPS) step conditions in a resol phenol-formaldehyde resin–ethylene glycol system on the physicochemical properties of carbon samples obtained after post-curing and pyrolysis. The results demonstrate that raising the PIPS step temperature leads to a decrease in macropore size and increase in the total mesopore volume. Pyrolysis of cured samples obtained at a PIPS step duration shorter than or equal to the gelation time leads to a “collapse” of the pore structure formed in the microphase separation step. Pyrolysis of cured samples after a PIPS step whose duration considerably exceeds the gelation time leads to shrinkage of the samples, without changes in their density or pore structure. PIPS step conditions have an insignificant effect on the structure of the carbon skeleton, which consists of X-ray amorphous carbon containing crystalline graphite inclusions.

中文翻译：

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甲阶酚醛树脂/乙二醇体系中微相分离条件对其热解产物性能的影响

摘要—

我们已经研究了在甲阶酚醛-甲醛树脂-乙二醇体系中，聚合诱导相分离（PIPS）步骤条件对后固化和热解后获得的碳样品的理化性质的影响。结果表明，升高PIPS步骤温度会导致大孔尺寸减小，总中孔体积增加。在PIPS步骤持续时间小于或等于胶凝时间的情况下，对固化的样品进行热解会导致在微相分离步骤中形成的孔结构“塌陷”。在持续时间大大超过胶凝时间的PIPS步骤之后，固化样品的热解会导致样品收缩，而其密度或孔结构不会发生变化。PIPS步骤条件对碳骨架的结构影响不大，