Effect of epoxy monomer structure on the curing process and thermo-mechanical characteristics of tri-functional epoxy/amine systems: a methodology combining atomistic molecular simulation with experimental analyses

2017 ◽  
Vol 8 (13) ◽  
pp. 2016-2027 ◽  
Author(s):  
Liang Gao ◽  
Qingjie Zhang ◽  
Hao Li ◽  
Siruo Yu ◽  
Weihong Zhong ◽  
...  
Keyword(s):  
Molecular Simulation ◽  
Experimental Research ◽  
Mechanical Characteristics ◽  
Curing Process ◽  
Epoxy Amine ◽  
Monomer Structure ◽  
System P ◽  
Epoxy Monomer ◽  
Amine System ◽  
Experimental Analyses

A methodology, which combined molecular simulation with experimental research, was established to expound the performance of a tri-functional epoxy/amine system.

Mesoscopic Heterogeneity in the Curing Process of an Epoxy–Amine System

2019 ◽  
Vol 52 (5) ◽  
pp. 2075-2082 ◽  
Author(s):  
Mika Aoki ◽  
Atsuomi Shundo ◽  
Riichi Kuwahara ◽  
Satoru Yamamoto ◽  
Keiji Tanaka
Keyword(s):  
Curing Process ◽  
Epoxy Amine ◽  
Amine System

scholarly journals New Epoxy Thermosets Derived from Clove Oil Prepared by Epoxy-Amine Curing

Polymers ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 44 ◽  
Author(s):  
David Santiago ◽  
Dailyn Guzmán ◽  
Xavier Ramis ◽  
Francesc Ferrando ◽  
Àngels Serra
Keyword(s):  
Renewable Resources ◽  
Crosslinking Density ◽  
Curing Process ◽  
Scanning Calorimetry ◽  
Compact Structure ◽  
Good Thermal Stability ◽  
Epoxy Amine ◽  
Epoxy Monomer ◽  
Amine Curing ◽  
Crosslinking Agents

New thermosets from a triglycidyl eugenol derivative (3EPOEU) as a renewable epoxy monomer were obtained by an epoxy-amine curing process. A commercially-available Jeffamine® and isophorone diamine, both obtained from renewable resources, were used as crosslinking agents, and the materials obtained were compared with those obtained from a standard diglycidylether of bisphenol A (DGEBA). The evolution of the curing process was studied by differential scanning calorimetry and the materials obtained were characterized by means of calorimetry, thermogravimetry, thermodynamomechanical analysis, stress–strain tests and microindentation. 3EPOEU formulations were slightly less reactive, and the thermosets obtained showed higher Tgs than those prepared from DGEBA, since they had higher crosslinking density than formulations with DGEBA because of the more compact structure and higher functionality of the eugenol derivative. 3EPOEU thermosets showed good thermal stability and mechanical properties. The results obtained in this study allow us to conclude that the triglycidyl derivative of eugenol, 3EPOEU, is a safe and environmentally friendly alternative to DGEBA.

EXPERIMENTAL RESEARCH OF PHYSICO-MECHANICAL CHARACTERISTICS OF INSTALLATION ARRIVALS

2020 ◽  
pp. 45-57
Author(s):  
Igor Iordanov ◽  
◽  
Yuliia Simonova ◽  
Andriy Petrenko ◽  
Anton Korol ◽  
...  
Keyword(s):  
Experimental Research ◽  
Mechanical Characteristics

scholarly journals Cure Kinetics and Inverse Analysis of Epoxy-Amine Based Adhesive Used for Fastening Systems

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3853
Author(s):  
Bilen Emek Abali ◽  
Michele Zecchini ◽  
Gilda Daissè ◽  
Ivana Czabany ◽  
Wolfgang Gindl-Altmutter ◽  
...  
Keyword(s):  
Inverse Analysis ◽  
Building Materials ◽  
Cure Kinetics ◽  
Accurate Estimation ◽  
Curing Process ◽  
Degree Of Cure ◽  
Material Parameters ◽  
Epoxy Amine ◽  
Thermosetting Polymers ◽  
Material Equation

Thermosetting polymers are used in building materials, for example adhesives in fastening systems. They harden in environmental conditions with a daily temperature depending on the season and location. This curing process takes hours or even days effected by the relatively low ambient temperature necessary for a fast and complete curing. As material properties depend on the degree of cure, its accurate estimation is of paramount interest and the main objective in this work. Thus, we develop an approach for modeling the curing process for epoxy based thermosetting polymers. Specifically, we perform experiments and demonstrate an inverse analysis for determining parameters in the curing model. By using calorimetry measurements and implementing an inverse analysis algorithm by using open-source packages, we obtain 10 material parameters describing the curing process. We present the methodology for two commercial, epoxy based products, where a statistical analysis provides independence of material parameters leading to the conclusion that the material equation is adequately describing the material response.

CRIMPS in an Epoxy–Amine System as Studied by ESR

2020 ◽  
pp. 279-287
Author(s):  
Boris E. Krisyuk ◽  
Boris A. Rozenberg
Keyword(s):  
Epoxy Amine ◽  
Amine System

Temperature Dependence of the Behavior of a Reactive Epoxy−Amine System by Means of Dynamic Rheology. 2. High-TgEpoxy−Amine System

1996 ◽  
Vol 29 (21) ◽  
pp. 6917-6927 ◽  
Author(s):  
Jean-Pascal Eloundou ◽  
Jean-François Gerard ◽  
Daniel Harran ◽  
Jean Pierre Pascault
Keyword(s):  
Temperature Dependence ◽  
Dynamic Rheology ◽  
Epoxy Amine ◽  
Amine System

scholarly journals The Curing Process of Epoxy/Amino-Functionalized MWCNTs: Calorimetry, Molecular Modelling, and Electron Microscopy

2010 ◽  
Vol 2010 ◽  
pp. 1-11 ◽  
Author(s):  
S. G. Prolongo ◽  
M. R. Gude ◽  
A. Ureña
Keyword(s):  
Molecular Simulation ◽  
Electron Microscopic ◽  
Reaction Heat ◽  
Simulation Tools ◽  
Curing Reaction ◽  
Morphological Studies ◽  
Epoxy Monomer ◽  
Curing Kinetic ◽  
Amine Groups ◽  
Functionalized Mwcnts

Curing kinetic of an epoxy resin reinforced with amino-functionalized MWCNTs has been studied by DSC and the obtained results were explained through morphological studies carried out by SEM, TEM, FEG-SEM, and molecular simulation tools. The presence of MWCNTs in the curing reaction induces a retardation effect of curing reaction and a decrease of the reaction heat. Both are associated with the adsorption of curing agent molecules inside carbon nanotubes, which was proved through the application of electron microscopic techniques and molecular simulation tools. It has been also demonstrated that there is a chemical reaction between amine groups anchored to the nanotubes and oxirane rings of epoxy monomer, which improves the nanoreinforcement/matrix interfacial adhesion, appearing a chemical interphase. The glass transition temperature (Tg) of epoxy matrix increases by the addition of MWCNTs due to the restriction of its mobility.

scholarly journals Design and Assessment of a Lightweight Polymer Concrete Utility Manhole

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Luciano Leonardi ◽  
Teresa M. Pique ◽  
Tomas Leizerow ◽  
Humberto Balzamo ◽  
Celina Bernal ◽  
...  
Keyword(s):  
Portland Cement ◽  
Wall Thickness ◽  
Chemical Resistance ◽  
Mechanical Performance ◽  
Minimum Weight ◽  
Polymer Concrete ◽  
Portland Cement Concrete ◽  
Epoxy Amine ◽  
Amine System ◽  
Typical Soil

Polymer concrete is a composite using polymer instead of portland cement as a binder. It allows optimizing the tensile and cracking strength and the chemical resistance of a concrete structure. In this study, different formulations were assessed in order to optimize a polymer concrete underground utility manhole with minimum weight. Formulations were based on an epoxy-amine system mixed with fine regular-weight aggregates and ultralightweight aggregates. The objective was to design and assess an underground utility structure with the epoxy chemical resistance, strength, and lightweight and to study whether the replacement of regular-weight aggregates by ultralightweight aggregates would contribute to improve the strength and reduce the structure weight. Two polymer concrete systems were designed from its formulation, and their mechanical performance was evaluated experimentally. A numerical model was developed for a polymer concrete underground utility structure made from the different formulations. It was simplified as a box subjected to typical soil loads. The size of the box is a standard one. Its minimum wall thickness is specified for sustaining the in-use service pressures obtained from numerical simulation. The model predicted that the epoxy/regular-weight aggregate formulation could be used with a wall thickness significantly smaller than the formulation with ultralightweight aggregates. In addition, the underground utility structure made with this formulation would weigh six times less than the same box made with a traditional portland cement concrete.

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