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Investigating the relationship between tack and degree of conversion in DGEBA-based epoxy resin cured with dicyandiamide and diuron

  • Ali Kuliaei , Iraj Amiri Amraei and Seyed Rasoul Mousavi
Published/Copyright: June 18, 2021
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Journal of Polymer Engineering
From the journal Journal of Polymer Engineering Volume 41 Issue 7

Abstract

The purpose behind this research was to determine the optimum formulation and investigate the cure kinetics of a diglycidyl ether of bisphenol-A (DGEBA)-based epoxy resin cured by dicyandiamide and diuron for use in prepregs. First, all formulations were examined by the tensile test, and then, the specimens with higher mechanical properties were further investigated by viscometry and tack tests. The cure kinetics of the best formulation (based on tack test) in nonisothermal mode was investigated using differential scanning calorimetry at different heating rates. Kissinger and Ozawa method was used for determining the kinetic parameters of the curing process. The activation energy obtained by this method was 71.43 kJ/mol. The heating rate had no significant effect on the reaction order and the total reaction order was approximately constant (m+n≅2.1). By comparing the experimental data and the theoretical data obtained by Kissinger and Ozawa method, a good agreement was seen between them. By increasing the degree of conversion, the viscosity decreased; as the degree of conversion increased, so did the slope of viscosity. The results of the tack test also indicated that the highest tack could be obtained with 25% progress of curing.

Keywords: cure kinetics; degree of conversion; DGEBA-based epoxy; dicyandiamide; tack
Corresponding author: Iraj Amiri Amraei, Department of Materials Science and Manufacturing Technology, Malek Ashtar University of Technology, Tehran158751774, Iran, E-mail:

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: The author(s) received no financial support for the research, authorship, and/or publication of this article.

  3. Conflict of interest statement: The author(s) declare no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

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Received: 2020-12-16
Accepted: 2021-04-29
Published Online: 2021-06-18
Published in Print: 2021-08-26

© 2021 Walter de Gruyter GmbH, Berlin/Boston

Articles in the same Issue

  1. Frontmatter
  2. Material properties
  3. Solid–liquid–liquid phase envelopes from temperature-scanned refractive index data
  4. Application of the Folgar–Tucker model to predict the orientation of particles of different aspect ratios in polymer suspensions
  5. Investigating the relationship between tack and degree of conversion in DGEBA-based epoxy resin cured with dicyandiamide and diuron
  6. Synergistic effect of oxidized low-dimensional carbon nanomaterials on the properties of polysulfone composite membrane
  7. Investigations of the characteristics and performance of modified polyethersulfones (PES) as membrane oxygenator
  8. Preparation and assembly
  9. In vitro biocompatibility study of microwave absorbing conducting polymer blend films for biomedical applications
  10. Design and characterization of ramie fiber-reinforced composites with flame retardant surface layer including iron oxide and expandable graphite
  11. Reducing lactose content of milk from livestock and humans via lactose imprinted poly(2-hydroxyethyl methacrylate-N-methacryloyl-i-aspartic acid) cryogels
  12. Engineering and processing
  13. PVA coating of ferrite nanoparticles triggers pH-responsive release of 5-fluorouracil in cancer cells
  14. Miscible blend polyethersulfone/polyimide asymmetric membrane crosslinked with 1,3-diaminopropane for hydrogen separation
  15. Pyrolysis and combustion of polystyrene composites based on graphene oxide functionalized with 3-(methacryloyloxy)-propyltrimethoxysilane
https://doi.org/10.1515/polyeng-2020-0340
Keywords for this article
cure kinetics; degree of conversion; DGEBA-based epoxy; dicyandiamide; tack

Articles in the same Issue

  1. Frontmatter
  2. Material properties
  3. Solid–liquid–liquid phase envelopes from temperature-scanned refractive index data
  4. Application of the Folgar–Tucker model to predict the orientation of particles of different aspect ratios in polymer suspensions
  5. Investigating the relationship between tack and degree of conversion in DGEBA-based epoxy resin cured with dicyandiamide and diuron
  6. Synergistic effect of oxidized low-dimensional carbon nanomaterials on the properties of polysulfone composite membrane
  7. Investigations of the characteristics and performance of modified polyethersulfones (PES) as membrane oxygenator
  8. Preparation and assembly
  9. In vitro biocompatibility study of microwave absorbing conducting polymer blend films for biomedical applications
  10. Design and characterization of ramie fiber-reinforced composites with flame retardant surface layer including iron oxide and expandable graphite
  11. Reducing lactose content of milk from livestock and humans via lactose imprinted poly(2-hydroxyethyl methacrylate-N-methacryloyl-i-aspartic acid) cryogels
  12. Engineering and processing
  13. PVA coating of ferrite nanoparticles triggers pH-responsive release of 5-fluorouracil in cancer cells
  14. Miscible blend polyethersulfone/polyimide asymmetric membrane crosslinked with 1,3-diaminopropane for hydrogen separation
  15. Pyrolysis and combustion of polystyrene composites based on graphene oxide functionalized with 3-(methacryloyloxy)-propyltrimethoxysilane
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