Preparation Of Coal-based COPNA Resin And Its Composites

COPNA resin is a new type of thermosetting resin with a 3-dimensionalnetwork structure, excellent heat resistance, good self-lubrication and strong affinity for carbon materials, in the field of precursor as carbon material has good application prospect, has become a widely attention of a new type of material. People try to use a variety of organic compound preparation COPNA resin as raw materials, including pure aromatic compounds, asphalt, coal tar, for reasons of large scale application and economy, make use of the relatively low cost raw material, more practical significance.It has been shown that coal heavy organic components are abundant in aromatic structure with little or even no side chains.Moreover such components have the advantage of small steric hindrance as well as abundant raw material sources. Therefore, heavy organic components of coal are expected to be excellent raw materials for preparation of COPNA resin. In this paper, Coal heavy organic components have been characterized to investigate the composition. B-stage COPNA resin was synthesized by using coal heavy organic components as raw materials with PXG as cross-linking agent and sulfuric acid as catalyst. The reaction mechanism of B-stage COPNA resin is studied by the IR profile of the material before and after the reaction. TG analysis of C-stage COPNA resin is conducted under different condition to optimize the cure condition of B-stage COPNA resin.Resin matrix composite is prepared with COPNA resin as binder and petroleum coke as aggregate.The compressive strength and volume density of the composite has been studied to explore the molding process conditions.The results show that the P resin content of COPNA resin with heavy organic components of coal as raw material is 46% and the carbon yield of which is more than 50%. The analysis of IR profile of pre-reaction and post-reaction shows the reaction mechanism, in which dehydration condensation reaction occurs for heavy organic components of coal and PGX with acid as the catalyst.The paper provides a theoretical basis for the synthesis of COPNA resin, using the coal heavy organic components as raw material. We prepared resin matrix composites with COPNA resin and carbon materials, which not only develops a new application field for the COPNA resin but also provides a new type of binder for the composites industry.