Effect of nanosilica on the kinetics of cure reaction and thermal degradation of epoxy resin

Ghaemy, Mousa; Bazzar, Maasoomeh; Mighani, Hossein

doi:10.1007/s10118-010-1003-9

Cited by 23 publications

(17 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The differential scanning calorimetry (DSC) technique was used to study the kinetics of curing reactions under non-isothermal modes [24][25][26][27][28]. A variety of kinetic models have been proposed to investigate kinetic parameters, such as Kissinger's [29,30], FlynnWall-Ozawa's [31], Kamal's [32], autocatalytic [33], and Borchardt Daniels's [34] methods. Camille et al [35] reported that montmorillonite is responsible for the decrease in the T max and the heat of the reaction of a nanocomposite compared with those of a diglycidyl ether of bisphenol A (DGEBA) system.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nanoclay on the Mechanical, Thermal, and Water Absorption Properties of an UP-toughened Epoxy Network

Paluvai

Mohanty

Nayak

2015

The Journal of Adhesion

View full text Add to dashboard Cite

Unsaturated polyester (UP) toughened epoxy nanocomposites were prepared, and their effective mechanical and thermal properties were studied. Two types of organo-modified montmorillonite (OMMT) clays were used to prepare the nanocomposites. X-ray diffraction (XRD) and Transmission electron microscope (TEM) analysis showed the formation of exfoliated silicate layers in the UP-toughened epoxy matrix. Mechanical tests revealed that nanocomposites (containing 1 wt % OMMT clay) showed an increase in tensile strength to 13.8%, flexural strength to 10% and impact strength to 4% compared with an UP-toughened epoxy blend. The effect of different heating rates on the curing behavior of UP toughened epoxy nanocomposites was investigated using nonisothermal differential scanning calorimetry. The data were interpreted using the Kissinger and Flynn-Wall-Ozawa models to find the curing reaction parameter. The water uptake behavior for nanocomposites increased with the addition of OMMTs.Scanning electron microscopy (SEM) micrographs indicated morphological changes in the impact fractured samples of UP-toughened epoxy nanocomposites. Downloaded by [New York University] at 10:15 14 June 2015 2 KEYWORDS: adhesives with nanoparticles; epoxy/epoxides; mechanical properties of adhesives, thermal analysis, cure/hardening, hydrogen bonding.Highlights:1. Toughened epoxy blends did not shown a reduction in mechanical properties.2. Two types of organo modified montmorillonite (OMMT) clays were incorporated at 0.5, 1, 2 and 3 wt % within a toughened epoxy system, and their effective mechanical, thermal and water absorption properties were systematically investigated.3. The nanoclay content was optimized at 1 wt % based on the mechanical performance of the toughened epoxy nanocomposites.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Nanoclay on the Mechanical, Thermal, and Water Absorption Properties of an UP-toughened Epoxy Network

Paluvai

Mohanty

Nayak

2015

The Journal of Adhesion

View full text Add to dashboard Cite

show abstract

“…In each case the peak temperature shifts from a higher value to a lower value with the change in heating rate from higher side to lower side. Slower heating rates give the sample more time to cure resulting a smaller value of peak temperature [16]. However, many equations have been developed to calculate the activation energy (E a ) for non-isothermal curing process.…”

Section: Non-isothermal Curingmentioning

confidence: 99%

“…However, many equations have been developed to calculate the activation energy (E a ) for non-isothermal curing process. In our present study, we have used Ozawa-Flynn-Wall method based on Doyle's approximation [16] for the calculation of Ea and is expressed as follows:…”

Section: Non-isothermal Curingmentioning

confidence: 99%

Steel Cord Skim Compound for Radial Tyre Based on Natural Rubber-Carbon Black-Organoclay Nanocomposites

Mohanty¹,

Chandra²,

Bhandari³

et al. 2016

JMSE-B

View full text Add to dashboard Cite

A novel carbon black (CB) and nanoclay (NC) filled system in Natural rubber (NR) matrix has been developed for steel cord tyre ply compound with optimized performance properties. The effect of partial replacement of CB (N-220) by two different kinds of nanoclay (Cloisite-20A and Cloisite-30B) on the adhesion properties has been extensively investigated. The nanocomposites have shown improved adhesion properties between steel cord and rubber (aged and unaged) i.e. pull out force and rubber coverage (%), for relatively lower loading of both Cloisite 20A and Cloisite 30B (3 phr). The addition of nanoclay at lower loading (upto 3 phr) leads to an increase in the overall performance of the rubber compound. Due to nano filler reinforcement, the cohesive strength of the nanocomposites increases, but it is still lower than the adhesive force between steel cord and rubber. As a result the failure is mostly cohesive with higher pull out force. The adhesion improvement is more significant in case of 3phr Cloisite 30B. Cloisite 30B contains polar modified quaternary alkyl ammonium ions as intercalants in its gallery spacing, which may form hydrogen bonding with the resin network available near the copper sulphide bonding layer and leads to better rubber reinforcement and higher pull out force. Dynamic contact angle measurement, transmission electron microscopy (TEM) and low angle X-ray diffraction (XRD) studies have been carried out to explain these phenomena.

show abstract

“…[5,8] Epoxy-silica nanocomposites can be used in adhesives, coatings, packaging materials for electronic devices, matrices of advanced composites with improved performance, and many other fields. [6,9,10] Liu et al have reported that nanoscale colloidal silica particles act as a curing agent in the curing state of epoxy-silica nanocomposite formation. It was showed an interesting reactivity of silica nanoparticles (SN) toward epoxy resins without the need of adding other catalyst in cure reaction.…”

Section: Introductionmentioning

confidence: 98%

“…It is important to study the cure kinetics and the correlation between the degree of cure and the thermal and mechanical properties to design the optimum curing conditions. [1][2][3][4][5][6][7] To provide organic-inorganic hybrid materials, we can mix the nanoscale particles with polymeric materials. [8] The hybrid materials are also known as nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

The effect of silica nanoparticles, thermal stability, and modeling of the curing kinetics of epoxy/silica nanocomposite

Arabli

Aghili

2014

Advanced Composite Materials

View full text Add to dashboard Cite

A nanocomposite was synthesized using silica nanoparticles (SN) and Epoxy Vinyl Ester Resin (VE671). Nanoparticles were dispersed in the mixture by ultrasonic equipment to prevent the agglomeration. Transmission electron microscopy was used to investigate the dispersion of the SN in the mixture. Non-isothermal differential scanning calorimetry technique was used to study the cure kinetics of VE671 resin with and without adding SN. The activation energy (E a ) was determined using Kissinger and Ozawa equations. The E a values of curing for VE671/4 wt% SN system showed a decrease with respect to the neat resin. It means that there is a catalytic effect of SN in the cure reaction. The dynamic curing process was modeled to predict the degree of cure and cure rate of resin using the Sun method. In this method, the results showed a good agreement between the model and the experimental data for different heating rates. Thermal degradation of nanocomposite using thermogravimetric analysis technique was studied. The char yields increased with the addition of 4 wt% of SN to the epoxy resin and improved the polymer flame retardancy and thermal resistance at high temperatures.

show abstract

Effect of nanosilica on the kinetics of cure reaction and thermal degradation of epoxy resin

Cited by 23 publications

References 29 publications

Effect of Nanoclay on the Mechanical, Thermal, and Water Absorption Properties of an UP-toughened Epoxy Network

Effect of Nanoclay on the Mechanical, Thermal, and Water Absorption Properties of an UP-toughened Epoxy Network

Steel Cord Skim Compound for Radial Tyre Based on Natural Rubber-Carbon Black-Organoclay Nanocomposites

The effect of silica nanoparticles, thermal stability, and modeling of the curing kinetics of epoxy/silica nanocomposite

Contact Info

Product

Resources

About