利用流变学等温测试方法研究铝对聚叠氮缩水甘油醚改性球形药固化的影响
发布时间：2019-03-17 13:32
【摘要】：为了研究铝在聚叠氮缩水甘油醚(GAP)改性球形药固化过程中的作用,利用流变学等温测试方法研究了铝对GAP改性球形药固化动力学的影响,采用热分析动力学Sestak-Berggren模型对固化动力学参数进行求解,分别建立了含0%铝和10%铝的GAP球形药的固化动力学模型。结果表明:GAP球形药固化过程中表观活化能变化不大,在0转化率0.8范围内可认为表观活化能为64.8 k J/mol,加入铝后反应的表观活化能增大,为85.1 k J/mol,反应级数增加,指前因子减小,说明铝对GAP球形药的固化反应具有消极影响;模型与实验数据吻合较好,说明可利用流变学等温测试方法研究固体GAP球形药的固化过程;对0%和10%铝两个体系的黏度变化进行分析发现,铝主要影响到GAP球形药固化的第二阶段,使异氟尔酮二异氰酸酯分子上位阻较大的异氰酸酯基反应更加困难,活化能增大。
[Abstract]:In order to study the effect of aluminum on the curing process of poly (azide) glycidyl ether (GAP) modified spherical drug, the effect of aluminum on the curing kinetics of GAP modified spherical drug was studied by means of rheological isothermal test. The curing kinetic parameters of GAP spherical compound containing 0% Al and 10% Al were solved by means of thermal analysis kinetic Sestak-Berggren model, and the curing kinetics models of the spherical drug containing 0% Al and 10% Al were established respectively. The results showed that the apparent activation energy did not change much during the curing process of GAP spherical drug. The apparent activation energy was 64.8 kJ / mol in the range of 0 conversion and 85.1 kJ / mol in the presence of aluminum. The increase of reaction order and the decrease of prefinger factor indicate that aluminum has a negative effect on the curing reaction of GAP spherical drug. The model is in good agreement with the experimental data, indicating that the curing process of solid GAP spherical drug can be studied by means of rheological isothermal test. The viscosity changes of 0% and 10% Al systems were analyzed. It was found that aluminum mainly affected the second stage of GAP spherical curing, which made isocyanate-based reaction with higher molecular resistance to isoflurane diisocyanate more difficult and activation energy increased.
【作者单位】： 中北大学化工与环境学院;
【分类号】：V512
本文编号：2442349
[Abstract]:In order to study the effect of aluminum on the curing process of poly (azide) glycidyl ether (GAP) modified spherical drug, the effect of aluminum on the curing kinetics of GAP modified spherical drug was studied by means of rheological isothermal test. The curing kinetic parameters of GAP spherical compound containing 0% Al and 10% Al were solved by means of thermal analysis kinetic Sestak-Berggren model, and the curing kinetics models of the spherical drug containing 0% Al and 10% Al were established respectively. The results showed that the apparent activation energy did not change much during the curing process of GAP spherical drug. The apparent activation energy was 64.8 kJ / mol in the range of 0 conversion and 85.1 kJ / mol in the presence of aluminum. The increase of reaction order and the decrease of prefinger factor indicate that aluminum has a negative effect on the curing reaction of GAP spherical drug. The model is in good agreement with the experimental data, indicating that the curing process of solid GAP spherical drug can be studied by means of rheological isothermal test. The viscosity changes of 0% and 10% Al systems were analyzed. It was found that aluminum mainly affected the second stage of GAP spherical curing, which made isocyanate-based reaction with higher molecular resistance to isoflurane diisocyanate more difficult and activation energy increased.
【作者单位】： 中北大学化工与环境学院;
【分类号】：V512
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，本文编号：2442349
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