Epoxy self-polymerization in smectite clays

Lan, Tie; Kaviratna, Padmananda D.; Pinnavaia, Thomas J.

doi:10.1016/0022-3697(95)00388-6

Cited by 220 publications

(166 citation statements)

References 6 publications

Supporting

Mentioning

160

Contrasting

Order By: Relevance

“…With the addition of the organoclay (T.30E) to the original Epon862/W resin, the nanocomposite system produces more exothermal heat (49.2 vs 45.7 cal/g) at lower curing onset temperature (102.5 vs 122.5°C). This demonstrates that the organoclay has some catalytic effect on the cross-linking polymerization of Epon862 with curing agent W. This catalytic effect of the organoclay is consistent with the report for the rubber state epoxy system [10]. During processing, the morphology of the system changes.…”

Section: Resultssupporting

confidence: 90%

Processing, Dynamic Studies and Properties of Exfoliated Aerospace Epoxy-Organoclay Nanocomposites

Chen

Curliss

2001

MRS Proc.

View full text Add to dashboard Cite

Epoxy nanocomposites were prepared from the montmorillonite after organic treatment with a high Tg epoxy resin (Shell Epon 862 and curing agent W). Investigation of the rheological characteristics showed that the addition of clay to the resin did not significantly alter the viscosity or cure kinetics and that the modified resin would still be suitable for liquid composite molding techniques such as resin transfer molding. DSC was performed to study the kinetics of the curing reactions in the modified resin. An in situ small-angle x-ray scattering (SAXS) experiment was used to try to understand the structural development during cure. Based on the in situ SAXS data, structural changes were monitored in real time during cure and analyzed. Results from wide-angle x-ray diffraction, SAXS, and transmission electron microscopy of the polymer-silicate nanocomposites were used to characterize the morphology of the layered silicate in the epoxy resin matrix. The glassy and rubbery moduli of the polymersilicate nanocomposites were found to be greater than the unmodified resin due to the high aspect ratio and high stiffness of the layered silicate filler. The solvent absorption in methanol was also slower for the polymer-silicate nanocomposites.

show abstract

Section: Resultssupporting

confidence: 90%

Processing, Dynamic Studies and Properties of Exfoliated Aerospace Epoxy-Organoclay Nanocomposites

Chen

Curliss

2001

MRS Proc.

View full text Add to dashboard Cite

show abstract

“…showed that chemical reactions in the intergallery can drive They possess elongated structure, whereas one dimension the layers to delaminate [53]. Of the many strategies devel-(diameter, d) is in the nanometer scale as illustrated in oped to fabricate epoxylclay nanocomposites, the most irn- In 1995, Pinnavaia et al [54] reported the exfoliated nanocomposites formed by clay modified with primary and secondary onium ions, whereas those modified with tertiary and quaternary onium ions retained the intercalated structure.…”

Section: Epoxy-based Nanocompositesmentioning

confidence: 99%

From clay to graphene for polymer nanocomposites—a survey

et al. 2014

View full text Add to dashboard Cite

The development of aerospace and automotive industries requests lightweight, high-paformance materials, and polymer nanocomposites are ideal candidates in this case, which is shown by the increasingly more publications in this research field over the past two decades. However, the performance of nanocompositenot only depend on the properties of their individual constituents, but on their morphology and surface characteristics of fillers as well. Selections of nanofille~ geometries, e.g. particulate, fibrous or layered have a tremendous influence on the properties of nanocomposites and their processing methods. In this paper, we review the chronological works performed in the field of polymer nanocomposites, in particular epoxy nanocomposites reinforced with layered fillers, such as clay and gitiphene. Surprisingly layered fillers are commercially available and more costeffective than nanoparticles and carbon nanofibres, and these make them to the most extensively studied fillers that can be geared toward future applications, particularly in large-scale polymer nanocomposite production.

show abstract

“…While the layered exfoliated structure and the platelet shape of the nanographite is responsible for the enhanced tensile properties [31][32][33][34]. The reinforcing mechanisms of ceramic fillers like the titanium dioxide and the montmorillonite clay that were used in the present study have been attributed to their large surface area and surface reactivity of the inorganic phase, the corresponding restricted mobility of the polymer chains and to the increase in the effective particle volume fraction in the nanocomposite [35][36][37]. The fracture properties of the gelcoats can be seen in Figure 3.…”

Section: Resultsmentioning

confidence: 90%

“…CNTs are able to create a critical path to diffuse thermal energy at this loading level. Based on an experimental study on thermally conductive composites filled with platelet-shaped boron nitride particles, it was suggested that fillers with platelet shape offer advantages over other spherical or cylindrical morphologies because they can overlap with a large contact area permitting much closer contact between adjacent platelets and reducing the thermal contact resistance [17,[34][35][36][37][38][39]. In addition, Table 4 depicts the data obtained for the coefficient of linear thermal expansion (CLTE) tests.…”

Section: Resultsmentioning

confidence: 99%

Effect of nanofillers on the properties of a state of the art epoxy gelcoat

Karapappas¹,

Tsotra²,

Scobbie³

2011

Express Polym. Lett.

View full text Add to dashboard Cite

Abstract. In this work, the effect of the inclusion of electrically conductive and non-conductive nanofillers in a state of the art epoxy gelcoat was studied. The conductive fillers used were multi-wall carbon nanotubes and exfoliated nanographite. The non-conductive ones were nanoclay and nano-titanium dioxide. The content of the nanofillers was 0.65% per weight and their inclusion took place using high shear mixing devices. The conductive fillers showed an increase in tensile and fracture properties, as well as in the thermal properties whereas the non-conductive fillers did not show any improvement on the fracture properties. The glass transition temperature was practically unaffected by the presence of the nanofillers while conversly, the coefficient of thermal expansion was decreased for all the nanofillers for temperatures above the glass transition temperature. Finally, weatherometer tests showed that the nanofillers contribute into less weight losses in comparison with the reference epoxy gelcoat.

show abstract

Epoxy self-polymerization in smectite clays

Cited by 220 publications

References 6 publications

Processing, Dynamic Studies and Properties of Exfoliated Aerospace Epoxy-Organoclay Nanocomposites

Processing, Dynamic Studies and Properties of Exfoliated Aerospace Epoxy-Organoclay Nanocomposites

From clay to graphene for polymer nanocomposites—a survey

Effect of nanofillers on the properties of a state of the art epoxy gelcoat

Contact Info

Product

Resources

About