Isothermal cure kinetics and thermodynamics of an epoxy–nickel–diamine system

2006 ◽  
Vol 55 (3) ◽  
pp. 279-284 ◽  
Author(s):  
M Ghaemy ◽  
AA Rostami ◽  
A Omrani
Keyword(s):  
Cure Kinetics ◽  
Kinetics And Thermodynamics ◽  
Isothermal Cure

scholarly journals Non-isothermal cure kinetics of aerogel/epoxy composites using differential scanning calorimetry

2019 ◽  
Vol 58 (16) ◽  
pp. 1757-1765 ◽  
Author(s):  
Suryanarayanan Krishnaswamy ◽  
Veronica Marchante ◽  
Hrushikesh Abhyankar ◽  
Zhaorong Huang ◽  
James Brighton
Keyword(s):  
Differential Scanning Calorimetry ◽  
Cure Kinetics ◽  
Epoxy Composites ◽  
Scanning Calorimetry ◽  
Isothermal Cure ◽  
Kinetics Of

Cure Kinetics of Neat and Nanophased Polyurethane Foams

2008 ◽  
Author(s):  
Sriram Mohan ◽  
Anandh Balakrishnan ◽  
Mrinal C. Saha
Keyword(s):  
Rate Constants ◽  
Preliminary Investigation ◽  
Cure Kinetics ◽  
Testing Procedure ◽  
Reaction Rates ◽  
Polyurethane Foams ◽  
Second Phase ◽  
Foam Sample ◽  
Isothermal Cure ◽  
Nanocomposite Foams

In this work, the isothermal cure behavior of a two part polyurethane foam system has been evaluated at temperatures between 25°C–80°C via a rheokinetic method. An ATD CSS 1000-Advanced Polymer Analyzer (APA) rheometer operating in torsion mode was used for this purpose. In the first phase of our work, neat polyurethane foams were investigated and the effects of cure temperature on the final cure modulus and density were documented. The testing procedure consisted of measuring G* as a function of time. The data obtained was fit to a generalized cure kinetics model to evaluate various parameters such as rate constants, reaction orders and activation energies. The rate constants as a function of temperature exhibited a straight line Arrhenius relationship. In the second phase of the work, 1% by weight of cloisite-15A nanoclay was used to manufacture nanocomposite foams. Isothermal cure tests were performed on the nanocomposite foam sample at 25°C. A preliminary investigation of the effect of nanoclay infusion on the final cure properties revealed no significant change. However the nanoclay foam sample exhibited higher reaction rates than its neat counterpart at the same temperature. The cell structures of these foams were studied using a JEOL 960 Scanning Electron Microscope. The micrographs supported the observations that neat foam samples showed an increased density and modulus at lower temperatures than at higher temperatures. The nanoclay sample also showed a higher density relative to its neat counterpart.

scholarly journals Isothermal Cure Kinetics of Epoxy Resin/Montmorillionite Composites Cured by Acid Anhydride

2005 ◽  
Vol 21 (06) ◽  
pp. 681-685 ◽  
Author(s):  
YANG Chao ◽  
◽  
JIANG Xue-liang ◽  
SUN Kang
Keyword(s):  
Epoxy Resin ◽  
Cure Kinetics ◽  
Acid Anhydride ◽  
Isothermal Cure ◽  
Kinetics Of

Cure Kinetics Study of Unfilled and Carbon Black Filled Synthetic Isoprene Rubber

2009 ◽  
Vol 82 (2) ◽  
pp. 149-169 ◽  
Author(s):  
Ximei Sun ◽  
Avraam I. Isayev
Keyword(s):  
Carbon Black ◽  
Rate Constants ◽  
Induction Time ◽  
Cure Kinetics ◽  
Curing Temperature ◽  
Time Model ◽  
Isothermal Cure ◽  
Temperature Dependences ◽  
The Difference ◽  
Arrhenius Temperature

Abstract The reversion type cure kinetic and induction time models were successfully utilized to predict the isothermal and nonisothermal evolution of the state of cure in vulcanization of the unfilled and carbon black (CB)-filled IR compounds measured by APA 2000. The rate constants for the reversion reaction and the formation of the stable and unstable crosslinks and the parameters of the induction time function with the Arrhenius temperature dependences were determined from the isothermal cure measurements. The equation was proposed to adequately describe the measured dependence of the difference between the maximum and minimum torques as a function of isothermal curing temperature. The measured induction time as a function of heating rate and step temperature variation was successfully predicted based on parameters of the isothermal induction time model. Isothermal cure modeling at each curing temperature individually or at all the curing temperatures simultaneously showed the excellent agreement with the experimental data for both curing and reversion. More severe reversion in the CB-filled IR in comparison with the unfilled IR was explained by comparing their reversion rate constants.

Application of non-isothermal cure kinetics on the interaction of poly(ethylene terephthalate) — Alkyd resin paints

2007 ◽  
Vol 91 (2) ◽  
pp. 409-412 ◽  
Author(s):  
D. S. Dias ◽  
M. S. Crespi ◽  
C. A. Ribeiro ◽  
J. L. S. Fernandes ◽  
H. M. G. Cerqueira
Keyword(s):  
Alkyd Resin ◽  
Ethylene Terephthalate ◽  
Cure Kinetics ◽  
Isothermal Cure ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Effect of zinc oxide nanoparticles on isothermal cure kinetics, morphology and mechanical properties of EPDM rubber

2012 ◽  
Vol 527 ◽  
pp. 91-98 ◽  
Author(s):  
Shahin Akhlaghi ◽  
Mohammadreza Kalaee ◽  
Saeedeh Mazinani ◽  
Effat Jowdar ◽  
Ali Nouri ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Cure Kinetics ◽  
Oxide Nanoparticles ◽  
Epdm Rubber ◽  
Isothermal Cure ◽  
Morphology And Mechanical Properties
Sign in / Sign up

Export Citation Format

Share Document