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Title: Model-free thermal degradation kinetics of bio-based phenolic resin derived from vanillin oxime
Authors: Chauhan, Narendra Pal Singh
Jangid, Nirmala Kumari
Chaudhary, Jyoti
Tomar, Ritu
Kataria, Paridhi
Keywords: Resins;Terpolymer resins;Phenolic resins;Vanillin;Oximes;Decomposition;Degradation;Model-free kinetics;Solid state mechanism
Issue Date: 12-Feb-2015
Abstract: A new terpolymer resin is synthesized from vanillin oxime and p-bromoacetophenone with formaldehyde by solution condensation technique in the presence of an acid. The structure of the terpolymer resin is confirmed by IR and NMR spectroscopy. The average molecular weight and the polydispersity index for the terpolymer are found to be 12,852 g/mol and 2.65 as calculated by gel permeation chromatography. The phase transition temperature (102-214 °C) has been determined by differential scanning calorimetry (DSC).  Thermal degradation characterstics and kinetic parameters such as activation energy are investigated by TG-DTG. The apparent activation energy of terpolymer resin using Kissinger-Akahira-Sunose, and Friedman methods are 10.2 and 10.8 kJ mol1, respectively. The most likely solid state decomposition process is D3 deceleration type as shown by Craido method and master plots.
Page(s): 193-198
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.54A(02) [February 2015]

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