Synthesis and characterization of epoxy-modified cement slurries—Kinetic data at hardened slurries/HCl interfaces

Cestari, Antonio R.; Vieira, Eunice F.S.; Pinto, Alane A.; Rocha, Fabio Carlos da

doi:10.1016/j.jcis.2008.08.008

Cited by 18 publications

(21 citation statements)

References 20 publications

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“…Generally, epoxy was mixed with cement mortar and been widely used as a type of polymer cement mortar due to its high bond strength to cement concrete, high inherent strength, water resistance, chemical resistance, weather-ability (Cestari et al, 2008). In Fig.…”

Section: Modification Of Sawdustmentioning

confidence: 99%

Preparation of bio-composite from wood sawdust and gypsum

Dai

Fan

2015

Industrial Crops and Products

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Section: Modification Of Sawdustmentioning

confidence: 99%

Preparation of bio-composite from wood sawdust and gypsum

Dai

Fan

2015

Industrial Crops and Products

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“…Powder cement (200-325 mesh, Class A) from Cimesa (Laranjeiras-SE, Brazil) was used. The characteristics of the cement powder were shown earlier [10]. The bisphenol F epoxy resin, commercially available as Araldite PY340, and its hardener (Versamid 125) were supplied by The Huntsman Co. Special Resins.…”

Section: Materials and Reagentsmentioning

confidence: 99%

“…The mixing procedure adopted was in accordance with the American Petroleum Institute (API) practice, and consisted of mixing the cement, epoxy resin, and hardener at 4000 rpm for 20 s, and then mixing for 30 s at 12,000 rpm [10,13]. Two epoxy-modified slurries were synthesized using 10% and 30% of the epoxy resin in relation to the cement mass.…”

Section: Preparation Of the Cement Slurriesmentioning

confidence: 99%

“…The cement and water were used to obtain the standard cement slurry. The amounts of the components of the slurries were calculated in relation to a final density of the cured slurries from 1.50 to 2.00 g cm À3 [10,13]. The cement slurries were cast into cylindrical molds with each 10.0 Â 20.0 mm for 6 h at room temperature before use.…”

Section: Preparation Of the Cement Slurriesmentioning

confidence: 99%

“…The conventional epoxy cement mortars with a hardener must have a polymer content higher than 40% to achieve good mechanical properties and durability. The epoxy resins can also harden in the presence of alkalis formed from the hydration of cement [10].…”

Section: Introductionmentioning

confidence: 99%

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Cement–epoxy/water interfaces – Energetic, thermodynamic, and kinetic parameters by means of heat-conduction microcalorimetry

Cestari

Vieira

Tavares

et al. 2010

Journal of Colloid and Interface Science

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Hydration phenomena at cement/water interfaces drive the characteristics of oil-well cement slurries. In this study, new epoxy-modified cement slurries were synthesized. The slurries characterization has suggested the presence of low amounts of portlandite in the slurry with the higher content of polymerized epoxy resin. The hydration processes of the cement slurries were studied by heat-conduction microcalorimetry. The energetic and enthalpic hydration data were all exothermic in nature. The cumulative heat release curves have shown the presence of multilinearity of the kinetic processes. The hydration microcalorimetric data were well fitted to the multistep Avrami kinetic model. It was found that the epoxy-modified cement slurries present a good potential to be used in environmental-friendly oil-well operations.

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Preparation of exfoliated clay/polymer nanocomposites via organosilane grafting and in situ ATRP of glycidyl methacrylate

Djouani

Herbst

Chehimi

et al. 2010

Surface & Interface Analysis

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Clay/polymer nanocomposites, of the type montmorillonite/poly(glycidyl methacrylate) (MMT/PGMA), were synthesized via atom transfer radical polymerization (ATRP). MMT was amino-silanized and then reacted with 2-bromoisobutyryl bromide (BIB) to provide -NH-C( O)-C(CH 3 ) 2 Br groups attached to the clay. The latter (MMT-SiBr) served as macroinitiator for the in situ ATRP of GMA. The resulting MMT/PGMA nanocomposites were found to be highly exfoliated, as judged by X-ray diffraction (XRD) measurements. Thermogravimetric analysis (TGA) and XPS analyses suggest that the nanocomposites have PGMA-rich bulk and surface. Indeed, the mass loading of PGMA reached 65 wt. % while XPS spectra, particularly the high-resolution C1s region, resemble those of pure PGMA.These clay/PGMA nanocomposites are suitable as nanofillers for epoxy adhesives, since PGMA chains are both compatible with epoxy resins and reactive towards crosslinkers via the pendant glycidyl groups from PGMA grafts.

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Synthesis and characterization of epoxy-modified cement slurries—Kinetic data at hardened slurries/HCl interfaces

Cited by 18 publications

References 20 publications

Preparation of bio-composite from wood sawdust and gypsum

Preparation of bio-composite from wood sawdust and gypsum

Cement–epoxy/water interfaces – Energetic, thermodynamic, and kinetic parameters by means of heat-conduction microcalorimetry

Preparation of exfoliated clay/polymer nanocomposites via organosilane grafting and in situ ATRP of glycidyl methacrylate

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