【摘要】 采用旋转黏度计测定了含有不同比例呋喃树脂的煤沥青的表观黏度。考察了呋喃树脂对煤沥青表观黏度、残炭率及软化点的影响。同时,采用扫描电镜(SEM)研究了添加呋喃树脂后煤沥青的表面形貌。结果表明,添加质量分数为 3.6%~9.0%的呋喃树脂使煤沥青在达到相同黏度值时温度下降 5℃ ~15℃,而残炭率不下降;由于呋喃树脂使煤沥青分子隔开从而改善了煤沥青的流动性能;另外加入适量的呋喃树脂可降低煤沥青的黏流活化能,有利于煤沥青在较宽温度范围内进行工艺操作。更多还原

【Abstract】 The effect of furan resin on the rheological properties of coal tar pitches was studied. The apparent viscosity of the parent coal tar pitch and coal tar pitches blended with furan resin were determined using a rotating coaxial-cylinder viscometer. The properties of different coal tar pitches, such as apparent viscosity, softening point and carbon yield, were also investigated. Moreover, the coal tar pitches were observed with a scanning (electron) microscope (SEM). It was found that the softening point of coal tar pitch blended with 3.6-9.0w/% furan resin is 5-15℃ lower than that of the parent coal tar pitch while the carbon yield remain unchanged. SEM observation reveals that the molecules of the coal tar pitch are segregated by furan resin, causing better flow properties. As a result, the viscous flow activation energy (E_a) of the coal tar pitches is reduced, which is beneficial to the process for producing carbon materials over a wide temperature range.更多还原