Kinetic method by using calorimetry to mechanism of epoxy-amine cure reaction

The aim of this work is development of method to determine the conversion of epoxy groups in the epoxy amine resins based on the epoxy oligomer ED-20 and hardener DDM. The studies were carried out in the NIR range. The mathematical division of the spectrum of the resins into individual peaks was used and concentrations of the functional groups were calculated on them. The dependence of the maximum conversion of epoxy groups in the resins after curing at 140 оС was obtained.

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Using two-dimensional time resolved light scattering to study the cure reaction induced phase separation process of epoxy-amine-polyethersulfone blend with secondary phase separation

Chinese Journal of Polymer Science ◽

10.1007/s10118-010-8201-3 ◽

2009 ◽

Vol 28 (1) ◽

pp. 63-68 ◽

Cited By ~ 1

Author(s):

Xiao-lin Tang ◽

Liang Li ◽

Lin Zhao ◽

Hong-dong Zhang ◽

Pei-yi Wu

Keyword(s):

Phase Separation ◽

Light Scattering ◽

Secondary Phase ◽

Separation Process ◽

Two Dimensional ◽

Cure Reaction ◽

Time Resolved ◽

Epoxy Amine ◽

Phase Separation Process ◽

Secondary Phase Separation

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Experimental Studies on Epoxy-Amine System Using Microwave and Conventional Curing Approaches

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.501.174 ◽

2012 ◽

Vol 501 ◽

pp. 174-178 ◽

Cited By ~ 5

Author(s):

Tao Sun ◽

Xin Long Chang ◽

Jian Wei Lai

Keyword(s):

Glycidyl Ether ◽

Experimental Studies ◽

Thermal Heating ◽

Scanning Calorimetry ◽

Cure Reaction ◽

Epoxy Amine ◽

Ft Ir ◽

Amine System ◽

The Difference ◽

Scanning Electron

In this present work attempts have been made to study the difference between microwave heating and conventional thermal heating in curing the epoxy-amine system of di-glycidyl ether bisphenol-A(DGEBA) with the curing agent of 4,4′Diamino diphenyl methane(DDM). Curing behaviors and mechanical properties of the system were studied through a number of experiments. Differential scanning calorimetry (DSC) technique was implemented to measure the glass transition temperature and kinetic parameters, and fourier transform infrared spectroscopy(FT-IR) was used to analyse the cure reaction mechanism of the resin system. Finally, microstructure of microwave-cured materials was also studied by using a scanning electron microscope(SEM) in order to analyze the morphology of cured specimens.

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Plasma Fibrin Stabilising Factor (F. S. F.) Activity in Normal Subjects and Patients with Chronic Liver Disease

Thrombosis and Haemostasis ◽

10.1055/s-0038-1653516 ◽

1969 ◽

Vol 21 (01) ◽

pp. 134-143 ◽

Cited By ~ 9

Author(s):

W. D Walls ◽

M. S Losowsky

Keyword(s):

Liver Disease ◽

Chronic Liver Disease ◽

Clinical Improvement ◽

Quantitative Estimation ◽

Kinetic Method ◽

Normal Subjects ◽

Chronic Liver ◽

Clinical Severity ◽

Plasma Fibrinogen ◽

Normal Range

SummaryA kinetic method for the quantitative estimation of plasma F.S.F. activity is described and discussed.This method was applied to normal subjects and to patients with chronic liver disease. The plasma F.S.F. activity was uninfluenced by either sex or age, and the normal range has been defined.A significant decrease in plasma F.S.F. activity was observed in patients with chronic liver disease. Subnormal levels of activity were found in 25% of such patients but were unrelated to episodes of abnormal haemorrhage. Plasma F.S.F. activity tended to be lower in patients with disease of greater clinical severity. In 2 patients showing clinical improvement there was an increase in plasma F. S. F. activity.It was confirmed that plasma fibrinogen levels increase with age.

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Radiotechnical hot pressed glass fiber plastics for ship aerial fairings and antennas protection in radio connection and radio location systems

Voprosy Materialovedeniya ◽

10.22349/1994-6716-2018-93-1-143-158 ◽

2019 ◽

pp. 143-158

Author(s):

V. E. Bakhareva ◽

I. V. Nikitina ◽

A. A. Churikova

Keyword(s):

Glass Fiber ◽

Silica Glass ◽

High Strength ◽

Scientific Problem ◽

Epoxy Amine ◽

Dielectric Glass ◽

Radio Location ◽

Location Systems

The article is devoted to the urgent scientific problem of creation and introduction in shipbuilding of high-strength, water-resistant dielectric glass-reinforced hot pressed plastics on the basis of bi- and polyfunctional epoxy-amine binders and glass fabrics from alkali, quartz and silica glass.

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Synthesis and characterization of some polyimide-epoxy composites

e-Polymers ◽

10.1515/epoly.2011.11.1.244 ◽

2011 ◽

Vol 11 (1) ◽

Cited By ~ 2

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.

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