Thermoanalytical Study and Kinetics of New 8-Hydroxyquinoline 5-sulphonic Acid-Oxamide-Formaldehyde Terpolymer Resins

R N Singru ,Wasudeo B Gurnule,Anil B Zade

doi:10.1155/2009/612054

R N Singru , Wasudeo B Gurnule + Show 1 more

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https://doi.org/10.1155/2009/612054

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Abstract

The terpolymer resins (8-HQ5-SAOF) have been synthesized by the condensation of 8-hydroxyquinoline 5-sulphonic acid (8-HQ5-SA) and oxamide (O) with formaldehyde (F) in the presence of acid catalyst and using varied molar proportion of the reacting monomers. The synthesized terpolymer resins have been characterized by different physico-chemical techniques. Thermogravimetric analysis of all terpolymer resins in present study have been carried out by non-isothermal thermogravimetric analysis technique in which sample is subjected to condition of continuous increase in temperature at linear rate. Thermal study of the resins was carried out to determine their mode of decomposition and relative thermal stabilities. Thermal decomposition curves were studied carefully with minute details. The Freeman-Carroll and Sharp-Wentworth methods have been used in the present investigation to calculate thermal activation energy and different kinetic parameter of the terpolymer resins. Thermal activation energy (Ea) calculated with above two mentioned methods are in close agreement. The advantage of Freeman-Carroll method is to calculate both the order of reaction (n) and energy of activation in one single stage by keeping heating rate constant. By using data of thermogravimetric analysis, various thermodynamic parameters like frequency factor (Z), entropy change (Δ S), free energy change (Δ F) and apparent entropy (S*) have been determined using Freeman-Carroll method.

Highlights

The synthesized terpolymer resins, showing versatile applications and properties, attracted the attention of scientist and introduce the recent innovations in the polymer chemistry.S172 W B GURNULE et al.These terpolymers can be used as high energy material[1], ion-exchanger[2], semiconductors[3], antioxidants, fire proofing agent, optical storage data, binders, molding materials etc
From the graphs of specific conductance against milliequivalents of base, first and last break were noted from which degree of polymerization (DP) and the number average molecular weight (Mn) have been calculated for each terpolymer resin
All the newly synthesized purified 8-HQ5-SAOF terpolymer resins were found to be yellow in colour

Summary

Introduction

The synthesized terpolymer resins, showing versatile applications and properties, attracted the attention of scientist and introduce the recent innovations in the polymer chemistry.S172 W B GURNULE et al.These terpolymers can be used as high energy material[1], ion-exchanger[2], semiconductors[3], antioxidants, fire proofing agent, optical storage data, binders, molding materials etc. No work seems to have been carried out on thermo analytical and kinetic studies of the terpolymer resins from 8-hydroxyquinoline 5sulphonic acid-oxamide and formaldehyde. Energy of activation (Ea), Kinetic parameter viz. Z, ∆S, ∆F, S*, and order of reaction (n) were determined by applying Freeman-Carroll Method.

Results

Conclusion