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Polymerization kinetics of boron carbideepoxy composites

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Date
2014-01-10
Author
Abenojar Buendía, Juana
Encinas García, Noemí
del Real Romero, Juan Carlos
Martínez Casanova, Miguel Ángel
Estado
info:eu-repo/semantics/publishedVersion
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Abstract
 
 
This study employs Differential Scanning Calorimetry (DSC) technique and focuses on the curing kinetics and the activation energy of the commercial epoxy resin (which cures at room temperature for 12 h) filled with boron carbide particles (B4C) in different amount (6 and 12 wt) and particle size (60 nm, 7 and 23 ?m). An isothermal dwell at different temperatures (25, 35 and 50 °C) was used for 180 min. Thereafter, the temperature is increased by 5 °C min?1 up to 200 °C to complete the curing process. Conversion degree is calculated by combining both methods. The kinetic constant and the reaction order are calculated using Kamal's equation with diffusion control. Consequently, the activation energy is computed assuming Arrhenius’ equation.The results show a significant influence of the temperature on the reaction mechanism. Furthermore, polymerization kinetics is affected by B4C additions depending on the amount and size of the added particles.
 
URI
https:doi.org10.1016j.tca.2013.10.030
Polymerization kinetics of boron carbideepoxy composites
Tipo de Actividad
Artículos en revistas
ISSN
0040-6031
Materias/ categorías / ODS
Instituto de Investigación Tecnológica (IIT)
Palabras Clave

Epoxy resin; Curing process kinetics; Boron carbide; Diffusion control
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