A dynamic DSC study of the curing process of epoxy resin

1997 ◽  
Vol 49 (1) ◽  
pp. 123-129 ◽  
Author(s):  
Susumu Tatsumiya ◽  
Katsumasa Yokokawa ◽  
Kyosuke Miki
Keyword(s):  
Epoxy Resin ◽  
Curing Process

Curing Process and Heat-Resistance of Polyethersulfone Toughened Epoxy Resins

2017 ◽  
Vol 898 ◽  
pp. 2302-2308
Author(s):  
Jin Li Zhou ◽  
Shu Zhu ◽  
Wen Pin Jia ◽  
Chao Cheng ◽  
Elwathig A.M. Hassan ◽  
...  
Keyword(s):  
Heat Resistance ◽  
Epoxy Resin ◽  
Thermo Gravimetric Analysis ◽  
Exothermic Peak ◽  
Curing Temperature ◽  
Gravimetric Analysis ◽  
Curing Process ◽  
Thermo Gravimetric ◽  
Rich Phase ◽  
Curing Reaction

In order to improve the toughness of epoxy resin, hydroxyl-terminated polyethersulfone (PES) with various amounts (0 wt.%, 5 wt.%, 10 wt.%, 15 wt.%, 20 wt.%) were added to bisphenol A epoxy resin (DER331)/ curing agent DETDA (E100) systems, and the influence of PES contents on curing process and heat-resistance was studied. Non-isothermal DSC was used to determine the curing process of uncured DER331/E100/PES systems at heating rate of 2°C/min, 5°C/min, 7°C/min, 10°C/min and 15°C/min separately, and the apparent activation energy was calculated based on Kissinger method. The morphology of the etched cured DER331/E100/PES systems with different PES contents was observed by SEM. The heat-resistance of these systems was investigated by DSC and TGA. The results showed that with the increasing of PES content the curing exothermic peak, the heat of curing reaction, the initial and final curing temperature all decreased at the first and then increased, indicating that when the PES content was low (5 wt.%, 10 wt.%), PES can facilitate the curing process, while, when PES content up to 15 wt.%, PES can prevent or weaken the curing reaction. SEM results indicated that the phase structure changed drastically depending on the PES content. The systems with 5 wt.% and 10 wt.% PES were epoxy-rich phase, with 15 wt.% PES was co-continuity phase, and with 20 wt.% PES showed complete phase inversion (PES rich phase). The glass transition temperature and thermo gravimetric analysis demonstrated that the addition of PES can increase the heat resistance of cured DER331/E100/PES systems.

scholarly journals Fluorescence investigation of epoxy resin LG 285 and mathematical description of the curing process

2019 ◽  
Vol 292 ◽  
pp. 01025
Author(s):  
Michaela Mikuličová ◽  
Vladimír Vašek ◽  
Vojtěch Křesálek
Keyword(s):  
Steady State ◽  
Fluorescence Spectroscopy ◽  
Epoxy Resin ◽  
Mathematical Description ◽  
Curing Process ◽  
Steady State Fluorescence ◽  
Two Component ◽  
Different Temperatures ◽  
Increasing Temperature ◽  
Steady State Fluorescence Spectroscopy

In this paper, steady-state fluorescence spectroscopy is used to investigate the curing of two-component epoxy resin LG 285. Moreover, the process of curing is mathematically described. The mixture of resin and hardener HG 287 is measured at five different temperatures (50 °C, 60 °C, 70 °C, 80 °C and 90 °C) for five and a half hours. The results indicate that the process of curing of epoxy resin decelerates with time and accelerates with increasing temperature. Furthermore, the energy of the barrier is calculated.

scholarly journals Effect of curing conditions on the cutting resistance of fabrics coated with inorganic-powder-reinforced epoxy composite

RSC Advances ◽  
2020 ◽  
Vol 10 (55) ◽  
pp. 33576-33584
Author(s):  
Xuefeng Yan ◽  
Leilei Wu ◽  
Shanshan Jin ◽  
Wei Zhao ◽  
Haijian Cao ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Polyethylene Terephthalate ◽  
Epoxy Composite ◽  
Curing Process ◽  
Curing Conditions ◽  
Cutting Resistance ◽  
Thermosetting Epoxy

Inorganic powders, SiO2 and Al2O3, were used as reinforcements and thermosetting epoxy resin was utilized as a matrix to manufacture IP/epoxy preform, which was coated on the surfaces of 2/1 twill woven polyethylene terephthalate fabrics before the final curing process.

Influence of aluminosilsesquioxane on epoxy resin curing process (Rapid Communication)

Polimery ◽  
2014 ◽  
Vol 59 (11/12) ◽  
pp. 855-858 ◽  
Author(s):  
Danuta Matykiewicz ◽  
Beata Dudziec ◽  
Tomasz Sterzynski
Keyword(s):  
Epoxy Resin ◽  
Curing Process ◽  
Rapid Communication ◽  
Resin Curing

scholarly journals Effect of Modification with Various Epoxide Compounds on Mechanical, Thermal, and Coating Properties of Epoxy Resin

2016 ◽  
Vol 2016 ◽  
pp. 1-13 ◽  
Author(s):  
Alaaddin Cerit ◽  
Mustafa Esen Marti ◽  
Ulku Soydal ◽  
Suheyla Kocaman ◽  
Gulnare Ahmetli
Keyword(s):  
Thermal Stability ◽  
Atomic Force Microscopy ◽  
Tensile Strength ◽  
Epoxy Resin ◽  
Curing Process ◽  
Coating Properties ◽  
Corrosive Media ◽  
Force Microscopy ◽  
Atomic Force ◽  
Thermal Stability Of

Epoxy resin (ER) was modified with four different epoxide compounds, 4,5-epoxy-4-methyl-pentane-2-on (EMP), 3-phenyl-1,2-epoxypropane (PhEP), 1-chloro-2,3-epoxy-5-(chloromethyl)-5-hexene (CEH), and a fatty acid glycidyl ester (FAGE), to improve its chemical and physical properties. The effects of the addition and amount of these modifiers on mechanical, thermal, and coating properties were investigated. Atomic force microscopy was used to observe the changes obtained with the modification. The influence of the modifying agents on the curing process was monitored through FTIR spectroscopy. The curing degrees of ER and modified ERs (M-ERs) were found to be over 91%. The results showed that tensile strength of ER improved till 30% (wt.) with addition of the modifier content. Modification with EMP and PhEP remarkably enhanced the thermal stability of ER to be highly resistant to the corrosive media.

Interaction between Polyaramidic Electrospun Nanofibers and Epoxy Resin for Composite Materials Reinforcement

2017 ◽  
Vol 748 ◽  
pp. 39-44 ◽  
Author(s):  
Stefano Merighi ◽  
Emanuele Maccaferri ◽  
Juri Belcari ◽  
Andrea Zucchelli ◽  
Tiziana Benelli ◽  
...  
Keyword(s):  
Composite Materials ◽  
Epoxy Resin ◽  
Electrospun Nanofibers ◽  
Cross Linking ◽  
Curing Process ◽  
Electrospinning Technique ◽  
Epoxy Matrix Composite ◽  
The Cross ◽  
Kinetics Of ◽  
Composite Properties

Interaction between poly (m-phenylene isophtalamide) (PMIA) electrospun nanofibers and commercial epoxy resin precursor during the cross-linking process was investigated, in order to use such polyaramidic nanofibers for composite materials reinforcement. Hence nanofibrous PMIA mats were produced via electrospinning technique to be used for the functional modification of the epoxy matrix composite properties. When adding such fibers to an epoxy resin precursor, it was observed a strong influence on the kinetics of its curing process. The final results, however, demonstrates that boosting the reaction condition (raising the temperature and the reaction time) the curing is pushed to completion, indicating that the cross-linking process of the resin is just delayed and not completely hampered. It will be therefore necessary to rethink the composite cure cycle when PMIA nanofibers are added to the composite material, in order to attain significant improvement of the final composite performance.

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