6101^(#)环氧胶的固化及其动力学分析

介绍了采用ＤＳＣ（差示扫描量热）方法，对６１０ｌ＃环氧胶加入不同比例的固化剂，通过对比试验确定了固化剂最佳加入量，并分析了固化反应的转化率α与固化时间ｔ及固化温度Ｔ之间的关系，求出了固化反应的表观活化能。

Al_(2)O_(3)/ZrO_(2)陶瓷浆料的光固化动力学

利用差热扫描量热法(DSC)原理考察了Al_(2)O_(3)/ZrO_(2)光敏陶瓷浆料的光固化动力学过程,研究了紫外光能量和填料对陶瓷浆料光固化动力学的影响,确立了光固化Al_(2)O_(3)/ZrO_(2)陶瓷浆料的固化动力学方程。随紫外光能量从300 mJ/cm^(2)增大到1950 mJ/cm2,氧化铝陶瓷浆料的最大反应速率从0.58 s^(-1)提高到0.99 s^(-1),转化率从55%增大到79%;同样温度和紫外光能量下,随Al2O3含量从100%降到25%,体系转化率从79.0%降低到55.8%。实验表明,增大紫外光的能量会提高陶瓷浆料光固化反应的反应速率和最终转化率,转化率随体系内Al_(2)O_(3)含量的减少而降低。最终得到了固体含量为40%的Al_(2)O_(3)/ZrO_(2)陶瓷浆料的固化动力学方程,Al_(2)O_(3)陶瓷浆料的表观活化能为233.7 kJ/mol,ZrO_(2)陶瓷浆料的表观活化能为767.2 kJ/mol。

Effect of TPB on curing reaction of HTPB-TDI

Catalysis effect of triphenyl bismuth （TPB） on kinetics of hydroxyl terminated polybutadiene-toluene diisocyanate （HTPB-TDI） curing reaction was studied by non-isothermal differential scanning calorimetry （DSC）. The characteristic temperature of curing system was measured for calculating kinetic parameters and establishing curing reaction kinetic equations. The results show that activation energy （Ea） of uncatalyzed HTPB-TDI curing system is 51.29 kJmol-1, and TPB decreases Ea to 46.43 kJ＇mol-1. Catalyst lowers reaction temperature and shortens curing time through decreasing ac- tivation energy of curing reaction and accelerating reaction rate. TPB can increase the reaction rate at 27 ℃ to the value of uncatalyzed system at 80 ℃. The catalytic activity reaches the maximum when concentration is 0.5 %.