Record Details

<strong>Cure kinetics and thermodynamics of polyurethane network formation based on castor oil based polyester polyol and 4,4’-diphenyl methane diisocyanate</strong>

Online Publishing @ NISCAIR

View Archive Info
 
 
Field Value
 
Authentication Code dc
 
Title Statement <strong>Cure kinetics and thermodynamics of polyurethane network formation based on castor oil based polyester polyol and 4,4’-diphenyl methane diisocyanate</strong>
 
Added Entry - Uncontrolled Name Balakrishnan, Remya
 
Uncontrolled Index Term Activation Energy; DSC; Polyurethane; Viscosity build up
 
Summary, etc. <p><span>In this work, isothermal curing kinetics of a non-catalysed and non-blown reaction between castor oil based polyester polyol and polymeric 4, 4’-diphenyl methane diisocyanate (MDI) has been investigated using Differential Scanning calorimeter (DSC) and viscosity build up studies. Several phenomenological models like Ozawa, Kissinger and Kissinger- Akahira-Sunose (KAS) isoconversional methods has been adopted to study polymerisation kinetics through DSC. DSC cure kinetics is studied at different heating rates (5°C/min, 10°C/min, 15°C/min and 20°C/min). Viscosity build up studies are also done for evaluating the kinetic parameters. These studies have been conducted for an isocyanate index [NCO equivalents/OH equivalents] of 1:1 and 1:2. Dynamic viscosity is measured as a function of time and rate constant and activation energy of the curing system is evaluated. Activation energy obtained for 1:1 index through Ozawa and Kissinger methods is found to be in the range of 70kJ/mol and for 1:2 index it is found to be in the range of 50kJ/mol. Thermodynamic parameters like Gibb’s free energy (Activation Free Energy), activation enthalpy and activation entropy of the polymerisation kinetics is calculated using Wynne-Jones-Eyring-Evans Theory.</span></p>
 
Publication, Distribution, Etc. Indian Journal of Chemical Technology (IJCT)
2021-08-17 17:06:45
 
Electronic Location and Access application/pdf
http://op.niscair.res.in/index.php/IJCT/article/view/30562
 
Data Source Entry Indian Journal of Chemical Technology (IJCT); ##issue.vol## 28, ##issue.no## 3 (2021): Indian Journal of Chemical Technology
 
Language Note en