Synthesis of C10H29O12Si8N (POSS T8-NH2) by corner-capped reaction and kinetics study for thermal process by OFWI and KASI methods

The mono-amine-functional POSS (POSS = polyhedral oligomeric silsesquioxane), (CH 3 ) 7 Si 8 O 12 (CH 2 ) 3 NH 2 (T 8 -NH 2 ), was synthesized via using γ -Aminopropyltriethoxysilane to corner-capping the incompletely condensed Heptamethyltrisilanol-POSS. Kinetics of thermal decomposition of the T 8 -NH 2 was explored with the isoconversional procedures. The E a values were calculated using the Kissinger–Akahira–Sunose intercept (KASI) and Ozawa–Flynn–Wall intercept (OFWI). The average values of E a associated with the two steps were determined to be 87.14 ± 5.32 kJ mol −1 , 115.84 ± 7.65 kJ mol −1 . The reaction mechanism functions of the two steps are as follows: (i) ( g ( α ) = [(1 + α ) (−1/3) −1] 2 ) and. (ii) No. 27( g ( α ) = α 2 ), which can be attributed to mechanisms of three-dimensional diffusion, one-dimensional diffusion, respectively. The values of the pre-exponential factor A of the two steps are: (i) 1.53 × 10 4 s −1 , (ii) 4.41 × 10 4 s −1 . Graphical abstract