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

Autor:	G. Bhaskar Raju, T. Sasipraba, K. Chennakesavulu, P. Sreedevi, M. Raviathul Basaria, G. Ramanjaneya Reddy, S Prabhakar
Rok vydání:	2014
Předmět:	Magic angle Chemistry Thermal decomposition Analytical chemistry Activation energy Carbon-13 NMR Condensed Matter Physics Mass spectrometry law.invention law Proton NMR Thermal stability Physical and Theoretical Chemistry Electron paramagnetic resonance Instrumentation
Zdroj:	Thermochimica Acta. 575:55-63
ISSN:	0040-6031
DOI:	10.1016/j.tca.2013.10.021
Popis:	Thermal decomposition of p-tert-butyl-calix[n]arene was studied using thermo gravimetry (TG) and differential thermo gram (DTG) methods. Non-isothermal TG was done under static air atmosphere with 1, 2.5, 5.0 and 10.0 K/min. Model-free methods such as Friedman and Flynn Wall Ozawa (FWO) were used to evaluate the kinetic parameters such as activation energy and exponential factors. The probable thermal 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 checked with p-tert-butyl-calix[n]arene as an antioxidant additive.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0f7b9d7a7ffe7eda66832c59f7097bbc https://doi.org/10.1016/j.tca.2013.10.021 Zobrazit plný text záznamu Full Text from ScienceDirect