| 1. | The apparent activation energies of the second stage of dvb / hpso and vpso / hpso are 339 . 89kj / mol and 484 . 76kj / mol , respectively
Al的加入也能明显降低si一o一c陶瓷的电阻率。 |
| 2. | Equal - transition ratio method is applied for the calculation of apparent activation energy ( e ) from the heat of hydration
本文建立了一种新的表观反应活化能计算方法? ?等转化率法。 |
| 3. | The apparent activation energy of jd and ty materials are 162 - 174kj / mol and 208 - 235 kj / mol , respectively
由线性回归分析计算出jd材料的烧结激活能为162 174kj mol ， ty材料的烧结激活能为208 235kj mol 。 |
| 4. | The pyrolysis of dvb / hpso and vpso / hpso can both be divided into two stages . the apparent activation energies of the first stage of dvb / hpso and vpso / hpso are 208 . 38kj / mol and 234 . 4 ikj / mol , respectively
在40wt % sic声si一o一c中加入al能进一步减少先驱体裂解时的体积收缩，同时也能起到增强作用。 |
| 5. | The reaction order and apparent activation energy of nanocomposites by emulsion and bulk methods are obviously increased . this also shows that the thermal stability of nanocomposites is much better than pure pmma , which is also confirmed by doyle method
Freeman - carroll差减微分法结果表明：本体法及乳液法复合材料的热分解反应级数和表观活化能均明显高于纯pmma ； doyle积分法佐证了这一点。 |
| 6. | The thermal decompostion kinetics of up / montmorillonite nanocomposites under nitrogen was studied . the reaction order and apparent activation energy of nanocomposites were obtained by freeman - carroll method . the results indicate the thermal stability of nanocomposites is higher than pure up ' s
研究了氮气气氛下不饱和聚酯蒙脱土纳米复合材料的热分解动力学，用freeman - carroll法确定了复合材料的反应级数n和表观反应活化能e 。 |
| 7. | This article confirmed the grafting efficiency of starch grafted to acrylic acid and the structure of starch and its grafted matter through the separation , purification and analysis tests to the grafted copolymer and the grafted forked - chain matter produced from the process of this reaction ; and deduced the formula of the velocity of such reaction mentioned above with a calculated result of the apparent activation energy in this reaction by the curve showing the relationship among the consistency of starch , monomer and initiator and the velocity of the grafting copolymerization
摘要对淀粉接枝丙烯酸所得接枝共聚物及接枝侧链物进行分离提纯和分析测试，确定了其接枝效率并表征了淀粉及其接枝物的形态结构；通过分别测定接枝共聚反应速率与淀粉、单体、引发剂浓度的关系曲线，确定了该接枝共聚反应的速率关系式；推算出了反应的表观活化能。 |
| 8. | The curing kinetics parameters of up with lwt % organic montmorillonite were determined by the dynamic dsc . its apparent activation energy is higher than pure up ' s , but reaction order is similar . these results show the addition of organic montmorillonite increase difficulty degree of curing reaction
采用非等温dsc法计算出的含有机蒙脱土1wt的不饱和聚酯树脂的表观反应活化能和固化温度高于不饱和聚酯树脂，但反应级数基本没有变化，说明加入有机蒙脱土使树脂的固化反应难度增大。 |
| 9. | An apparent activation energy of 182 . 35kj / mol was obtained for the range of 1250 c to 1350 c , and that of 82 . 32kj / mol for the range of 1350 c to 1400 c . at the same time , the relation between reaction velocity and reaction time is linear in the range of 1250 c to 1350 c , but it is a parabola curve in the range of 1350 c to 1400 c . so it can be concluded that the process undergone in the range of 1250 c to 1350 c is controlled by chemical reaction while that in the range of 1350 c to 1400 c by diffusion
本实验采用的试样是以钛白粉和活性碳按1 ： 30的比例混合料为原料，在6mp下成型为37 . 2 26mm的柱形样块，分别在1250 、 1350和1400于氮化炉中测定反应速率与时间的关系。当反应在1250 1350时，表观活化能为182 . 35kj mol 160kj mol ，反应速率与时间的关系是线性的，说明此阶段反应由化学反应控制。当反应在1350 1400时，表观活化能为82 . 32kj mol 160kj mol ，反应速率与时间的关系符合抛物线方程，说明此阶段反应由扩散控制。 |
