新型炭材料
新型炭材料
신형탄재료
NEW CARBON MATERIALS
2015年
2期
176-180
,共5页
金鸣林%程洁羚%王连星%金双玲%张睿
金鳴林%程潔羚%王連星%金雙玲%張睿
금명림%정길령%왕련성%금쌍령%장예
流变学%基氏流动度仪%高温煤焦油沥青%中间相沥青
流變學%基氏流動度儀%高溫煤焦油瀝青%中間相瀝青
류변학%기씨류동도의%고온매초유력청%중간상력청
Rheological properties%Giseeler fluidity instrument%High temperature coal tar pitch%Mesophase pitch
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。
用基斯勒爾法研究瞭熱處理前後(室溫~520℃)相瀝青的流變性質。結果錶明:在不同溫度和不同加熱速率下,基斯勒爾流動度具有很好的重現性。未經熱處理的中間相瀝青的流動度在253~282℃之間隨溫度增加緩慢增加,在282~311℃隨溫度增加呈現指數增大,在282~498℃幾乎不變。熱處理的瀝青的流動度也隨溫度增加呈現類似的S型的變化規律,其中指數增加段可以用阿倫尼烏斯公式計算其粘流活化能。瀝青的甲苯不溶物含量隨熱處理時間增大從67.3%增大到88.7%,粘流活化能為203.6~294 kJ/mol。
용기사륵이법연구료열처리전후(실온~520℃)상력청적류변성질。결과표명:재불동온도화불동가열속솔하,기사륵이류동도구유흔호적중현성。미경열처리적중간상력청적류동도재253~282℃지간수온도증가완만증가,재282~311℃수온도증가정현지수증대,재282~498℃궤호불변。열처리적력청적류동도야수온도증가정현유사적S형적변화규률,기중지수증가단가이용아륜니오사공식계산기점류활화능。력청적갑분불용물함량수열처리시간증대종67.3%증대도88.7%,점류활화능위203.6~294 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.