Effect on the Mechanical Properties and Water Absorption of Granite Powder Composites on Toughening Epoxy with Unsaturated Polyester and Unsaturated Polyester with Epoxy Resin

Ramakrishna, H. V.; K., S.

doi:10.1177/0731684406055450

Cited by 27 publications

(21 citation statements)

References 13 publications

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“…The water absorption behavior of polymer composites in a humid environment is determined by many factors, such as processing techniques, matrix filler characteristics, composition of the composites, and so on [33]. Kinloch has studied the mechanical adhesion between epoxy and silica [10].…”

Section: Discussionmentioning

confidence: 99%

The effect of water absorption on the dielectric properties of epoxy nanocomposites

Zou

Fothergill

Rowe

2008

IEEE Trans. Dielect. Electr. Insul.

240

167

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This is the unspecified version of the paper.This version of the publication may differ from the final published version. Permanent repository link ABSTRACTIn this research, the influence of water absorption on the dielectric properties of epoxy resin and epoxy micro-composites and nano-composites filled with silica has been studied. Nanocomposites were found to absorb significantly more water than unfilled epoxy. However, the microcomposite absorbed less water than unfilled epoxy: corresponding to reduced proportion of the epoxy in this composite. The glass transition temperatures of all the samples were measured by both differential scanning calorimetry and dielectric spectroscopy. The T g decreased as the water absorption increased and, in all cases, corresponded to a drop of approximately 20K as the humidity was increased from 0% to 100%. This implied that for all the samples, the amount of water in the resin component of the composites was almost identical. It was concluded that the extra water found in the nanocomposites was located around the surface of the nanoparticles. This was confirmed by measuring the water uptake, and the swelling and density change, as a function of humidity as water was absorbed. The water shell model, originally proposed by Lewis and developed by Tanaka, has been further developed to explain low frequency dielectric spectroscopy results in which percolation of charge carriers through overlapping water shells was shown to occur. This has been discussed in terms of a percolation model. At 100% relative humidity, water is believed to surround the nanoparticles to a depth of approximately 5 monolayers. A second layer of water is proposed that is dispersed by sufficiently concentrated to be conductive; this may extend for approximately 25 nm. If all the water had existed in a single layer surrounding a nanoparticle, this layer would have been approximately 3 to 4 nm thick at 100%. This "characteristic thickness" of water surrounding a given size of nanoparticle appeared to be independent of the concentration of nanoparticles but approximately proportional to water uptake. Filler particles that have surfaces that are functionalized to be hydrophobic considerably reduce the amount of water absorbed in nanocomposites under the same conditions of humidity. Comments are made on the possible effect on electrical aging.

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Section: Discussionmentioning

confidence: 99%

The effect of water absorption on the dielectric properties of epoxy nanocomposites

Zou

Fothergill

Rowe

2008

IEEE Trans. Dielect. Electr. Insul.

240

167

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“…Every parameter is important in the course of casting. Therefore, the acceptable binder rates are 16,18,20,22,24,26, and 28% for the polyester resin, and 14.3%, 18%, and 22% for the epoxy resin, as the fillers could be completely moisturized without any additives upon Compression Strength by Granulometry in Cement the preliminary studies appropriate for our own design structure. The filler is quartz for the remaining section.…”

Section: Methodsmentioning

confidence: 98%

Optimization of Compression Strength by Granulometry and Change of Binder Rates in Epoxy and Polyester Resin Concrete

Ateş

2008

Journal of Reinforced Plastics and Composites

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Polymer concretes are composite materials comprised of two or more different materials. The fillers are compounds such as resin, hardener, accelerator, colorant, or matrix structure reinforcing materials. When it is considered as a building component for the body of a machine tool, machine or application, different compounds are prepared for the target application. By means of an appropriate design, production and tests that can resist the working conditions, it is possible for any composite to obtain the desired result. For this purpose, it is necessary to determine many mechanical properties. The pressure strength is therefore a basic feature to know. Within the framework of this study, the change in pressure strength was elaborated on the basis of the different aggregate distribution and binder rates designed on the standard cement granulometric curves. The used binders and fillers were polyester and epoxy resin and quartz respectively. The results comply with the literature, and it was found that an appropriate mixture optimization is possible for the desired strength.

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“…The concrete structures were studied based on two types of resins: (1) polyester resin [13][14][15][16][17][18][19] and (2) epoxy resin [11,[20][21][22][23][24][25][26]. A hardener/toughener is added to improve the resin properties.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Mechanical Characteristics for Mineral Cast Materials with Varying Resin Content

Selvakumar

Mohanram

2013

J Eng Technol

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Effect on the Mechanical Properties and Water Absorption of Granite Powder Composites on Toughening Epoxy with Unsaturated Polyester and Unsaturated Polyester with Epoxy Resin

Cited by 27 publications

References 13 publications

The effect of water absorption on the dielectric properties of epoxy nanocomposites

The effect of water absorption on the dielectric properties of epoxy nanocomposites

Optimization of Compression Strength by Granulometry and Change of Binder Rates in Epoxy and Polyester Resin Concrete

Evaluation of Mechanical Characteristics for Mineral Cast Materials with Varying Resin Content

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