添加松香对中间相炭微球制备的影响

以中温煤沥青为原料,松香为添加剂,通过热缩聚合法制备中间相炭微球。采用FT-IR、SEM、偏光显微镜等对所得产物进行表征,研究了松香对中间相炭微球制备的影响。研究表明松香的加入能有效限制沥青的过度聚合,不仅促进中间相炭微球的成核和生长,而且在很大程度上防止中间相炭微球的融并;当松香添加量为10%(质量分数)时,改性煤沥青经450℃热解2h可制备出球形度好、粒径均匀的中间相炭微球,其平均粒径为15.3μm,收率达44.1%。

Effect of rosin addition on preparation of mesocarbon microbeads

Mesocarbon microbeads(MCMB) were prepared by thermal polymerization of medium-temperature coal tar pitch with rosin as additive.The MCMB were characterized by FT-IR,SEM and particle size analyzer,and effect of rosin addition on the preparation of MCMB was investigated in this paper.Results show that rosin can be used to efficiently control the thermal polymerization of coal tar pitch,as indicated by that the rosin addition is benificial for promoting the nucleation and growth of MCMB as well as for inhibiting the coalescence of MCMB.The MCMB,which possess fine sphericity and well dispersity,can be achieved by pyrolysis of the modified pitch with 10wt% rosin at 450℃ for 2h.The MCMB obtained have a mean diameter of 15.3μm,and the yield of MCMB arrives at 44.1%.