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Polycarboxylate ester adsorption on cement grains: Influence of polydispersity
Cement and Concrete Research, 2021Abstract Although in academic and industrial practice polymers are typically described by their average molecular parameters, most often they display a polydispersity both in size and in properties. In this paper, we focus on the influence of polydispersity on the adsorption of polycarboxylate ester on cement grains and on its influence on the ...
Bessaies-Bey, Hela +8 more
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Studies on thermal stability of modified polycarboxylate cements [PDF]
Die Angewandte Makromolekulare Chemie, 1995 AbstractDental cement compositions made by mixing poly(acrylic acid‐co‐acrylamide) and mixtures of zinc oxide and cryolite (Na3AIF6) in various proportions of 10–50 wt.‐% (w/w) were cured at room temperature. From thermogravimetric analyses of the samples, the integral procedural decomposition temperatures (IPDT), maximum decomposition temperatures ...
D.V.S. Murthy +3 more
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The nature of the zinc polycarboxylate cement matrix
Journal of Biomedical Materials Research, 1982AbstractThe matrix of a stoichiometric zinc polycarboxylate cement has been shown to be identical with zinc polycarboxylate salt, which consists principally of neutralized carboxylate groups with a few free acid groups. When excess zinc oxide is present, as in practical cements, there are no free acid groups present.
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Adsorption Behavior of Polycarboxylate Superplasticizer on Cement Particles
Applied Mechanics and Materials, 2013In this paper, the adsorption behavior of polycarboxylate superplasticizer (PC) on cement was examined. Through adsorption of PC, adsorption area of the molecule was calculated, and it is found that PC molecule would maintain curled shape when it was adsorbed on the surface of cement particles.
Jia Hui Peng, Zhi Kun Li
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Influence of Polycarboxylate Superplasticizer on Cement Hydration Products
Applied Mechanics and Materials, 2014This paper studied the effect of polycarboxylate superplasticizer on cement hydration products through XRD, DTA/TG, ESEM, IR, XPS and adsorption test, and suggested that the new hydration products were not discovered in the adding PC sample; the adding of PC delayed the formation of hydration product of Aft; with the hydration, the PC molecules were ...
Zhi Kun Li, Jia Hui Peng
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The Influence of Various Admixes on the Physical Properties of a Polycarboxylate Cement
Journal of Dental Research, 1983Aluminum oxide, aluminum hydroxide, aluminum fluoride-trihydrate, and titanium dioxide hydrate were added to a commercial polycarboxylate cement. The first substance increased the setting time and certain physical properties. The others decreased the same properties to varying degrees.
G. Øilo, I.E. Ruyter
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Bond strength of polycarboxylic acid cements to treated dentine
Dental Materials, 1985Abstract The effect of some dentine surface pretreatments proposed in the literature to enhance the bond strengths of one or more polycarboxylic acid cements, has been examined. Few of these pretreatments have been independently investigated. The bond strengths of two polycarboxylic acid cements, one of which contained SnF2, and a glass-ionomer ...
D.R. Beech, R. Bernier, A. Solomon
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Some Mechanical Properties of Dental Polycarboxylate Cements
Polymer-Plastics Technology and Engineering, 1993Abstract The mechanical properties of three commercial zinc polycarboxylate dental cements were studied. The interaction of these cements with tooth structure was investigated by following the change in their tensile and shear stress. The results also showed that the cements may interact with dentin but to a lower extent than with enamel.
M. A. Moharram +2 more
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On the electrical conductivity of dental zinc polycarboxylate cement
Journal of Materials Science Letters, 1988Le ciment commercial Lumicon (Bayer) utilise a pour composition un liquide qui est une solution aqueuse d'acide polyacrylique a 45%, la poudre consiste en un melange de ZnO 2 (30%) et MgO (10% en poids).
Kh. Tahon, A. Sawaby, M. A. Moharam
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Physical Properties of Some Zinc Phosphate and Polycarboxylate Cements
Acta Odontologica Scandinavica, 1983Several physical properties were measured for two zinc phosphate and three polycarboxylate cements. The specimens were tested in compression 24 h after they had been made. Two series of specimens were examined. In one series the cement powders were given a correct treatment, protected from atmospheric humidity.
Trond Hegdahl, Rogério Branco
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