Branching Kinetics of Epoxy Polymerization of 1,4-Butanediol Diglycidyl Ether with cis-1,2-Cyclohexanedicarboxylic Anhydride

1990 ◽  
pp. 65-69
Author(s):  
Benjamin Chu ◽  
Chi Wu
Keyword(s):  
Diglycidyl Ether ◽  
Kinetics Of

Investigating the relationship between tack and degree of conversion in DGEBA-based epoxy resin cured with dicyandiamide and diuron

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ali Kuliaei ◽  
Iraj Amiri Amraei ◽  
Seyed Rasoul Mousavi
Keyword(s):  
Epoxy Resin ◽  
Reaction Order ◽  
Theoretical Data ◽  
Cure Kinetics ◽  
Diglycidyl Ether ◽  
Degree Of Conversion ◽  
Ozawa Method ◽  
Heating Rates ◽  
Scanning Calorimetry ◽  
Kinetics Of

Abstract The purpose behind this research was to determine the optimum formulation and investigate the cure kinetics of a diglycidyl ether of bisphenol-A (DGEBA)-based epoxy resin cured by dicyandiamide and diuron for use in prepregs. First, all formulations were examined by the tensile test, and then, the specimens with higher mechanical properties were further investigated by viscometry and tack tests. The cure kinetics of the best formulation (based on tack test) in nonisothermal mode was investigated using differential scanning calorimetry at different heating rates. Kissinger and Ozawa method was used for determining the kinetic parameters of the curing process. The activation energy obtained by this method was 71.43 kJ/mol. The heating rate had no significant effect on the reaction order and the total reaction order was approximately constant ( m + n ≅ 2.1 $m+n\cong 2.1$ ). By comparing the experimental data and the theoretical data obtained by Kissinger and Ozawa method, a good agreement was seen between them. By increasing the degree of conversion, the viscosity decreased; as the degree of conversion increased, so did the slope of viscosity. The results of the tack test also indicated that the highest tack could be obtained with 25% progress of curing.

Kinetics of polycondensation of allyl bromide and monoethanolamine vinyl ether with resorcinol diglycidyl ether

2009 ◽  
Vol 82 (5) ◽  
pp. 871-874
Author(s):  
K. Kh. Khakimbolatova ◽  
E. E. Ergozhin ◽  
T. K. Chalov ◽  
T. V. Kovrigina ◽  
A. I. Nikitina
Keyword(s):  
Vinyl Ether ◽  
Allyl Bromide ◽  
Diglycidyl Ether ◽  
Kinetics Of

Reaction kinetics of a novel thermoset nanocomposite: the glycerol diglycidyl ether/3,3-dimethylglutaric anhydride/nano-Al2O3 system

2011 ◽  
Vol 143 (5) ◽  
pp. 739-746 ◽  
Author(s):  
Abdollah Omrani ◽  
Abbas Ali Rostami ◽  
Fatemeh Ravari ◽  
Arezou Mashak
Keyword(s):  
Reaction Kinetics ◽  
Diglycidyl Ether ◽  
Kinetics Of

scholarly journals Dynamic Cure Kinetics and Physical-Mechanical Properties of PEG/Nanosilica/Epoxy Composites

2020 ◽  
Vol 2020 ◽  
pp. 1-10 ◽  
Author(s):  
Haleh Nowruzi Varzeghani ◽  
Iraj Amiri Amraei ◽  
Seyed Rasoul Mousavi
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Cure Kinetics ◽  
Diglycidyl Ether ◽  
Solid Particles ◽  
Scanning Calorimetry ◽  
Cure Reaction ◽  
Cure Kinetic ◽  
Cure Temperature ◽  
Kinetics Of

This study investigated the effect of polyethylene glycol (PEG) and nanosilica (NS) on the physical-mechanical properties and cure kinetics of diglycidyl ether of bisphenol-A-based epoxy (DGEBA-based EP) resin. For this purpose, tensile and viscometry tests, dynamic mechanical thermal analysis (DMTA), and differential scanning calorimetry (DSC) were carried out under dynamic conditions. The results showed that adding NS and PEG enhances the maximum cure temperature as well as the heat of cure reaction (ΔH) in EP-NS, while it decreases in EP-PEG and EP-PEG-NS. The cure kinetic parameters of EP-PEG-NS were calculated by Kissinger, Ozawa, and KSA methods and compared with each other. The Ea calculated from the Kissinger method (96.82 kJ/mol) was found to be lower than that of the Ozawa method (98.69 kJ/mol). Also, according to the KAS method, the apparent Ea was approximately constant within the 10-90% conversion range. Tensile strength and modulus increased by adding NS, while tensile strength diminished slightly by adding PEG to EP-NS. The glass transition temperature (Tg) was calculated using DMTA which was increased and decreased by the addition of NS and PEG, respectively. The results of the viscometry test showed that the viscosity increased with the presence of both PEG and NS and it prevented the deposition of solid particles.

Kinetics of the curing reaction of a diglycidyl ether of bisphenol A with a modified polyamine

2005 ◽  
Vol 438 (1-2) ◽  
pp. 126-129 ◽  
Author(s):  
Alessia Catalani ◽  
Maria Grazia Bonicelli
Keyword(s):  
Bisphenol A ◽  
Diglycidyl Ether ◽  
Curing Reaction ◽  
Kinetics Of

Kinetics of formation and relaxation characteristics of crosslinked polymers prepared from resorcinol diglycidyl ether

1976 ◽  
Vol 18 (7) ◽  
pp. 1828-1837 ◽  
Author(s):  
V.V. Kochervinskii ◽  
V.G. Shevchenko ◽  
A.T. Ponomarenko ◽  
V.G. Sokolov ◽  
M.A. Akhmamet'ev ◽  
...  
Keyword(s):  
Diglycidyl Ether ◽  
Crosslinked Polymers ◽  
Kinetics Of Formation ◽  
Kinetics Of ◽  
Relaxation Characteristics
Sign in / Sign up

Export Citation Format

Share Document