聚合
中间相
反应性(心理学)
化学工程
碳化
材料科学
甲醛
催化作用
高分子化学
纹理(宇宙学)
化学
有机化学
复合材料
聚合物
扫描电子显微镜
相(物质)
人工智能
计算机科学
工程类
医学
替代医学
图像(数学)
病理
作者
José L. Crespo,A. Arenillas,José Antonio Fernández Viña,Roberto Garcı́a,Colin E. Snape,Sabino R. Moinelo
出处
期刊:Energy & Fuels
[American Chemical Society]
日期:2005-02-11
卷期号:19 (2): 374-381
被引量:4
摘要
The influence of polymerization with formaldehyde on the thermal reactivity of a low-temperature coal tar pitch has been investigated. The mechanism and extent of the polymerization depends on the catalyst used, the greatest extent of polymerization being achieved under basic catalytic conditions. After the polymerization treatment, samples were carbonized at 420 °C and the products were characterized by optical microscopy. According to the results, polymerization with formaldehyde increases the reactivity of the pitch, giving rise to increased carbonization yields and leading to the formation of the mesophase with milder conditions. The polymerization process also affects the morphology of the resultant anisotropic material, giving rise to the formation of irregularly shaped mesophase particles and reducing the optical texture size of the anisotropic domains, giving mosaic texture, especially when basic catalysis is used.
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