The effect of nanoclay on the cure kinetics of glass/waterborne epoxy nanocomposites is investigated. First step in sample preparation involves dispersing Cloisite® Na+, a natural montmorillonite, in distilled water at 70°C with the aid of a sonicator. Then, desired amounts of dicyandiamide and 2-methyl imidazole, serving as cross-linkers, are mixed to the aqueous nanoclay solution. As the mixing continues, Epi-Rez 3522-W-60 waterborne epoxy resin is introduced to the solution and the compound is mixed for an additional 30 minutes. The nanoclay content of this batch is adjusted to be at 2wt%. An identical second batch, which does not comprise nanoclay, is also prepared to serve as the baseline data. Glass/waterborne epoxy prepregs containing 30% glass fibers are prepared from these batches and used to characterize the effects of nanoclay. The evolution of viscoelastic properties during curing are characterized by the APA2000 rheometer. Using the storage and loss moduli profiles during curing, gel time and maximum storage modulus are characterized. Effect of nanoclay on the glass transition temperature is determined by applying an additional temperature cycle following the cure cycle. In addition, mechanical performances of the samples are characterized by three point bending tests. Nanoclay is observed to yield 2-fold higher storage modulus during curing. Rate of curing is measured to be substantially slower for the samples comprising nanoclay. In addition, glass transition temperature improved by 5% to 99°C with the addition of nanoclay compared to 94.5°C for the samples without nanoclay. Flexural stiffness of the samples containing nanoclay is measured to be 20% higher than the samples without nanoclay while the strength remained virtually unaffected.
Skip Nav Destination
ASME 2006 Multifunctional Nanocomposites International Conference
September 20–22, 2006
Honolulu, Hawaii, USA
Conference Sponsors:
- Nanotechnology Institute
ISBN:
0-7918-4761-6
PROCEEDINGS PAPER
Cure Kinetics of Nanocomposites Prepared From Aqueous Dispersion of Nanoclay
Levent Aktas,
Levent Aktas
University of Oklahoma, Norman, OK
Search for other works by this author on:
M. Cengiz Altan
M. Cengiz Altan
University of Oklahoma, Norman, OK
Search for other works by this author on:
Levent Aktas
University of Oklahoma, Norman, OK
M. Cengiz Altan
University of Oklahoma, Norman, OK
Paper No:
MN2006-17080, pp. 133-139; 7 pages
Published Online:
October 2, 2008
Citation
Aktas, L, & Altan, MC. "Cure Kinetics of Nanocomposites Prepared From Aqueous Dispersion of Nanoclay." Proceedings of the ASME 2006 Multifunctional Nanocomposites International Conference. Multifunctional Nanocomposites. Honolulu, Hawaii, USA. September 20–22, 2006. pp. 133-139. ASME. https://doi.org/10.1115/MN2006-17080
Download citation file:
5
Views
Related Proceedings Papers
Related Articles
Post-Curing Effects on Marine VARTM FRP Composite Material Properties for Test and Implementation
J. Eng. Mater. Technol (January,2006)
Effects of Graphene Oxide Thin Films and Nanocomposite Coatings on Flame Retardancy and Thermal Stability of Aircraft Composites: A Comparative Study
J. Eng. Mater. Technol (July,2019)
Effect of Resin Formulation on Thermoset Viscoelasticity
J. Eng. Mater. Technol (October,2006)
Related Chapters
Chitosan-Based Drug Delivery Systems
Chitosan and Its Derivatives as Promising Drug Delivery Carriers
Viscoelastic Parameters of Epoxy Resin from Thermomechanical and Electrical Conductivity Measurements
Composite Materials: Testing and Design (Fifth Conference)
Characterization of Ultra-High Temperature and Polymorphic Ceramics
Advanced Multifunctional Lightweight Aerostructures: Design, Development, and Implementation