scholarly journals Studies on curing of epoxy resins. XV. Effect of accelerators on epoxy-amine curing reaction.

1985 ◽  
Vol 42 (9) ◽  
pp. 577-583
Author(s):  
Takashi KAMON
Keyword(s):  
Epoxy Resins ◽  
Curing Reaction ◽  
Epoxy Amine ◽  
Amine Curing

Acid-aided epoxy-amine curing reaction as reflected in epoxy/Fe3O4 nanocomposites: Chemistry, mechanism, and fracture behavior

2018 ◽  
Vol 125 ◽  
pp. 384-392 ◽  
Author(s):  
Maryam Jouyandeh ◽  
Meisam Shabanian ◽  
Mahroo Khaleghi ◽  
Seyed Mohammad Reza Paran ◽  
Samira Ghiyasi ◽  
...  
Keyword(s):  
Fracture Behavior ◽  
Curing Reaction ◽  
Epoxy Amine ◽  
Amine Curing

scholarly journals MODIFICATION OF EPOXY-AMINE POLYMERS BY OLIGOHEXAMETHYLENEGUANIDINES

2016 ◽  
Vol 11 (6) ◽  
pp. 98-102
Author(s):  
I. N. Senchikhin ◽  
E. S. Zhavoronok ◽  
E. V. Kharitonova ◽  
V. I. Roldugin
Keyword(s):  
Epoxy Resins ◽  
Homogeneous System ◽  
Water Soluble ◽  
Good Solubility ◽  
Epoxy Amine ◽  
Insoluble Material ◽  
The Matrix ◽  
Amine System ◽  
Amine Curing Agent ◽  
Amine Curing

Methods of introducing a water-soluble biocide modifier, oligohexamethyleneguanidine hydrochloride, into epoxy-amine systems were studied. The obvious way is the introduction of the modifier in the waterborne epoxy-amine systems. However, this leads to cured systems with reduced mechanical properties. Introduction of oligohexamethyleneguanidine hydrochloride solutions in organic solvents into epoxy-amine systems allows obtaining a homogeneous system, but their application is limited by the presence of a volatile solvent. Finally, introduction of oligohexamethyleneguanidine hydrochloride solutions in a water-soluble amine curing agent into epoxy-amine systems has good prospects. It is shown that the analyzed modifier has good solubility in ethylenediamine, but poor solubility in oligooxypropylenediamine. It was found that the modifier is capable of interacting chemically with epoxy resins at 22°C to form an elastic insoluble material. In an epoxy-amine system with a more active hardener (ethylenediamine) oligohexamethyleneguanidine hydrochloride acts as a plastifier (flexibilizer). This significantly reduces the glass transition temperature of the matrix (from 53 to 37ºC).

Theoretical Study on Mechanisms of the Epoxy−Amine Curing Reaction

2007 ◽  
Vol 40 (12) ◽  
pp. 4370-4377 ◽  
Author(s):  
Jan-Eric Ehlers ◽  
Nelson G. Rondan ◽  
Lam K. Huynh ◽  
Ha Pham ◽  
Maurice Marks ◽  
...  
Keyword(s):  
Theoretical Study ◽  
Curing Reaction ◽  
Epoxy Amine ◽  
Amine Curing

Synthesis and characterization of some polyimide-epoxy composites

e-Polymers ◽  
2011 ◽  
Vol 11 (1) ◽  
Author(s):  
Toheed Akhter ◽  
Humaira Masood Siddiqi ◽  
Zareen Akhter ◽  
M. Saeed Butt
Keyword(s):  
Thermal Behavior ◽  
Epoxy Resins ◽  
Analytical Techniques ◽  
Char Yield ◽  
Epoxy Composites ◽  
Hydroxyl Group ◽  
Synthesis And Characterization ◽  
Tetracarboxylic Acid ◽  
Epoxy Amine

AbstractComposites from some novel polyimide and commercial epoxy were prepared aiming to improve the thermal behavior of epoxy resins. Two diamines namely 4-4'-diamino-4''-hydroxytriphenyl methane (DHTM) and 4-4'- diaminotriphenyl methane (DTM) were synthesized by reacting aniline and aldehydes according to a reported method. The synthesized diamines were blended with commercially available epoxy 1, 4-butanedioldiglycidylether (BDDE) to synthesize model epoxy amine networks which were compared with polyimideepoxy composites. The polyimides were synthesized by reaction of these diamines with aromatic anhydride namely 3,3',4,4'-benzophenone tetracarboxylic acid dianhydride (BTDA). These synthesized polyimides were dispersed in epoxy diamine networks to prepare composites. All the monomers and composites were characterized by making use of various analytical techniques including FTIR, NMR, TGA, DSC and XRD. Presence of hydroxyl group in the diamine helped in better dispersion of polyimide leading to high Tg and high char yield at 600 °C.

Synthesis of Three Novel Aromatic Biazomethine Liquid- Crystalline Epoxy Resins and Curing Reaction with Aromatic Diamine

2011 ◽  
Vol 216 ◽  
pp. 34-38
Author(s):  
Jun Gang Gao ◽  
Xiao Na Zhang ◽  
Yong Gang Du
Keyword(s):  
Melting Point ◽  
Epoxy Resins ◽  
Liquid Crystalline ◽  
Diphenyl Ether ◽  
Hydroxyl Group ◽  
Aromatic Diamine ◽  
Curing Reaction ◽  
Ozawa Equation ◽  
Liquid Crystalline Epoxy ◽  
Clearing Temperature

Three class of novel liquid crystalline epoxy resins containing azomething groups: N,N’-Bis[4-(2,3-epoxypropoxy)benzylidene]-4,4-diamino-diphenyl ether (p-BEPBDDE), N,N’-Bis[4-(2,3-epoxypropoxy)benzylidene]-4,4-diamino-diphenyl methane (p-BEPBDDM) and N,N’-Bis[(4-(2,3-epoxypropoxy)-benzyliden)-1,4- phenylene diamine] (p-BEPBPD) were synthesized and characterized. The results show that p-BEBDDE and p-BEBDDM belong to smectic texture and melting point is 239.5 and 178 oC, respectively. The p-BEPBD is nematic texture between its melting temperature (Tm) of 192 oC and clearing temperature (Ti) of 238 oC. The curing reaction can be described by Ozawa equation, and the alcohol-hydroxyl group can accelerate the curing reaction and decrease Ea in DSC experiment.

scholarly journals CHEMICALLY RESISTANT FLAME RETARDING COATINGS BASED ON EPOXY-AMINE COMPOSITES MODIFIED WITH COPPER(II) CARBONATE

Fire Safety ◽  
2019 ◽  
pp. 66-71
Author(s):  
P. V. Pastuhov ◽  
V. V. Kochubei ◽  
O. I. Lavrenyuk ◽  
B. M. Mykhalichko
Keyword(s):  
Flame Propagation ◽  
Epoxy Resins ◽  
Experimental Studies ◽  
Gravimetric Method ◽  
Fire Retardant ◽  
Propagation Rate ◽  
Binding Agent ◽  
Corrosive Media ◽  
Epoxy Amine ◽  
Effect Of Copper

Introduction. The development of modern technologies and the elaboration of new materials facilitates the wide use of epoxy resins for instance in industries. Particular attention deserves the various fire retardant coatings making. These coatings are increasingly used to increase fire resistance of details and designs made of metals, plastics, wood in various industrial and civil constructions, and in transport. The very perspective mode producing the effective fire retardant coatings is the direct introduction into the polymeric matrix of epoxy resins of reactive fire retardant agents. Purpose. The aim of this work is to study the effect of the elaborated fire retardant on the ability of epoxy-amine composites modified with copper(II) carbonate to resist the spread of the flame, as well as the effects of water and chemicals. Metods. The flame propagation rate on the surface of horizontally located experimental samples was determined according to all-State Standard 28157-89. Water and chemical resistance were evaluated by a gravimetric method on the polymer mass film change after exposure to distilled water and corrosive media for a certain period of time. Results. The results of experimental studies have shown that samples of the epoxy-amine composites containing 20, 40 and 80 mass parts of CuCO3 per 100 mass part of the binding agent do not propagate the flame horizontally at all. At that, duration of free combustion of these polymer samples did not exceed 2 min. It has been found too that the penetrability of water and chemicals through films based on epoxy-amine composites modified with CuCO3 is reduced due to the formation of chemical bonds between copper(II) carbonate and polyethylenepolyamine. The lowest level of the equilibrium absorption in water and 10% aqueous solutions of H2SO4 and NaOH was watched for samples of those composites that contained 20 mass parts of CuCO3 per 100 mass parts of binder. Conclusion. When studying the effect of copper(II) carbonate on the flame propagation rate, it was found that the epoxy-amine composites containing >20 mass parts of CuCO3 per 100 mass parts of the binding agent, do not propagate the flame and so these are self-extinguishing. The copper(II) carbonate addition to epoxy polymers reduces their sorption capacity in water and solutions of alkalis and acids. These data are the basis to future develop the chemically resistant fire retarding coatings based on epoxy-amine composites modified with copper(II) carbonate. Keywords

Warpage Behaviors of System-in-Packages on a Substrate Strip

2018 ◽  
Vol 2018 (1) ◽  
pp. 000344-000348
Author(s):  
Eric Ouyang ◽  
Billy Ahn ◽  
SeonMo Gu ◽  
Jim Hsu ◽  
Yonghyuk Jeong ◽  
...  
Keyword(s):  
Material Characterization ◽  
Epoxy Resins ◽  
Curing Process ◽  
Molding Compound ◽  
Advanced Material ◽  
Curing Reaction ◽  
Different Types ◽  
The Impact ◽  
Compound Materials ◽  
Kinetics Of

Abstract In this paper, the impact of two different types of warpage, strip warpage and system-in-packages (SiP) module warpage, are considered and studied, both experimentally and numerically. An advanced material characterization method is also conducted to study the curing reaction and Pressure-Volume-Temperature-Cure (PVTC) kinetics of the packages. The curing reaction of epoxy resins, as a function of temperature and activation energies, is experimentally determined. During the curing process, the viscosity of epoxy resins change with temperature and conversion rate. The Castro-Macosko model is adopted to describe the rheological properties of epoxy resins. Experimentally, we have prepared substrate strip samples with different component density and molding compound materials. Each substrate strip contains eighteen system-in-packages. The warpages of all substrate strips and all the system-in-package modules were measured, compared, and correlated.

Adducts of Epoxy Resins with Oligohexamethyleneguanidine and Their Based Modified Epoxy-Amine Films

2019 ◽  
Vol 61 (5) ◽  
pp. 610-618
Author(s):  
E. S. Zhavoronok ◽  
I. P. Sedishev ◽  
A. V. Safonov ◽  
I. N. Senchikhin
Keyword(s):  
Epoxy Resins ◽  
Epoxy Amine ◽  
Modified Epoxy

Model reactions of amine curing of glycidylamine epoxy resins: Homopolymerization of N-methylglycidylaniline

1992 ◽  
Vol 30 (10) ◽  
pp. 2109-2120 ◽  
Author(s):  
Libor Mat??jka ◽  
S˘t??pán Podzimek ◽  
William J. Simonsick ◽  
Pavel ??pa??ek ◽  
Karel Du??ek
Keyword(s):  
Epoxy Resins ◽  
Amine Curing ◽  
Model Reactions
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