摘要
用基斯勒尔法研究了热处理前后（室温～520℃）相沥青的流变性质。结果表明：在不同温度和不同加热速率下，基斯勒尔流动度具有很好的重现性。未经热处理的中间相沥青的流动度在253～282℃之间随温度增加缓慢增加，在282～311℃随温度增加呈现指数增大，在282～498℃几乎不变。热处理的沥青的流动度也随温度增加呈现类似的S型的变化规律，其中指数增加段可以用阿伦尼乌斯公式计算其粘流活化能。沥青的甲苯不溶物含量随热处理时间增大从67.3%增大到88.7%，粘流活化能为203.6～294 kJ/mol。
The Giseeler fluidity method was used to investigate the rheological properties of pitch with and without heat treatment from room temperature to 520 ℃. Results show that the fluidity has a good repeatability at different temperatures under different heat-ing rates. The fluidity of the raw pitch slowly increases from 253 to 282℃, then increases exponentially from 282 to 311℃ near the softening temperature, and finally remains unchanged from 311 to 498 ℃. This changing pattern of fluidity with temperature has also been found for heat-treated mesophase pitch and can be formulated by the Arrhenius equation, from which the viscous flow activation energy can be obtained. The toluene-insoluble fraction increases from 67. 3% to 88. 7% with heat-treatment time and the flow activa-tion energy of the treated mesophase pitch in the Newtonian fluid region at low temperature range is between 203. 6 and 294 kJ/mol.
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
北大核心
2015年第2期176-180,共5页
New Carbon Materials
基金
Capacity Building Program of Shanghai Local Universities(12160503600)
First-class Discipline Construction Fund of Shanghai M unicipal Education Commission(J201212)
Shanghai Science and Technology Development Fund(09520500700)
National Natural Science Foundation of China(U1332107)
Key Discipline Construction Fund of Composite M aterials of Shanghai Institute of Technology(10210Q140001)~~
关键词
流变学
基氏流动度仪
高温煤焦油沥青
中间相沥青
Rheological properties
Giseeler fluidity instrument
High temperature coal tar pitch
Mesophase pitch
