Thermal decomposition mechanism of p-tert-butyl-calix[n]arenes

tThermal decomposition of p-tert-butyl-calix[n]arene was studied using thermo gravimetry (TG) and dif-ferential thermo gram (DTG) methods. Non-isothermal TG was done under static air atmosphere with1, 2.5, 5.0 and 10.0 K/min. Model-free methods such as Friedman and Flynn Wall Ozawa (FWO) wereused to evaluate the kinetic parameters such as activation energy and exponential factors. The probablethermal decomposition mechanism was proposed by analyzing the quenched intermediate p-tert-butyl-calix[n]arene samples with FTIR, mass,1H NMR,13C NMR cross polarization magic angle spectrometry(CP-MAS), EPR spectroscopy and elemental analysis. The thermal stability of the polyolefins was checkedwith p-tert-butyl-calix[n]arene as an antioxidant additive