Results 201 to 210 of about 387,480 (278)

Effect of polycarboxylate-based water-reducing admixture chains length on portland cement-admixture compatibility

Journal of Sustainable Cement-Based Materials, 2023
This study investigated, the effect of polycarboxylate-based water-reducing admixture (PCE) molecule chain length modification on the cementadmixture compatibility. Seven PCEs with varying chain lengths were synthesized for this aim.
Veysel Kobya, Kemal Karakuzu, A. Mardani, B. Felekoğlu, K. Ramyar   +4 more
semanticscholar   +1 more source

Tissue reactions to polycarboxylate cements

Journal of Endodontics, 1976
Root canals of the teeth of two dogs were filled with polycarboxylate cements, with and without additives. After 120 to 225 days, histologic examination showed the presence of severe, persistent inflammatory lesions around the materials. The results indicated that there would be no advantages to using polycarboxylates as root canal filling materials.
Ronald R. Wollard, Joseph D. Maggio, Abram Barnett, Samuel Seltzer, Steven O. Brough   +4 more
openaire   +3 more sources

The bonding of polycarboxylate cement to gold

Australian Dental Journal, 1977
Abstract— A comparison is made of several types of treatment of the surface of gold which will promote greater bonding with polycarboxylate cement.
Olbert W. Rogers, Jack R. Griffith
openaire   +3 more sources

Influence of talc on the properties of polycarboxylate cement

Journal of Oral Rehabilitation, 1997
summary Zinc oxide, the inorganic component of polycarboxylate cement, was mixed with talc in various proportions from 10% to 50%. These powder mixtures were spatulated with poly(acrylic acid) in three powder to liquid (P/L) ratios of 1:1, 1‐5:1 and 2:1 (w/w).
D.V.S. Murthy, U.S. Tewari, R. K. Bansal, P. Singh   +3 more
openaire   +3 more sources

Study on the Impact of Na/Ca Bentonites on the Dispersion Performance of Conventional and Modified Phosphate Polycarboxylate Superplasticizers in Cement Mortar.

Langmuir, 2022
Through molecular structure design, modified polycarboxylate superplasticizers (PCEs) were synthesized via copolymerization using isoprenyl oxy poly(ethylene glycol) ether (TPEG), acrylic acid, and hydroxyethyl methacrylate phosphate.
Hui Feng, Yucheng Mao, Zhongjun Feng, Zuiliang Deng, Baicun Zheng   +4 more
semanticscholar   +1 more source

Influence of cryolite on the properties of polycarboxylate cement

The Journal of Prosthetic Dentistry, 1995
Zinc oxide, the inorganic component of polycarboxylate cement, was mixed with the filler cryolite (Na3A1F6) in various proportions that ranged from 10% to 50%. These powder combinations were mixed with polyacrylic acid in three powder-to-liquid ratios of 1:1, 1.5:1, and 2:1 (w/w).
D.V.S. Murthy, U.S. Tewari, P. Singh, R. K. Bansal   +3 more
openaire   +3 more sources

Studies on polycarboxylates and related cements

Journal of Dentistry, 1972
Abstract Ten polycarboxylate cement powders have been analysed for their major constituents and have been classified into four main categories. Zinc oxide appears to be the principal component of all the powders. Some contain magnesium oxide up to about 10 per cent. One material contains alumina, and three of the powders contain polyacrylic acid.
E.C. Combe, B.W. Bertenshaw
openaire   +3 more sources

Pulp Reaction to a Polycarboxylate Cement in Monkeys

Journal of Dental Research, 1974
Pulp response to a polycarboxylate cement was evaluated microscopically in 48 teeth with intact dentin floors, and in 55 teeth with exposed pulps. The innocuous effect of polycarboxylate cements on the pulp was substantiated, although its use for pulp capping is not recommended.
David F. Mitchell, D.M. Dickey, Ralph W. Phillips, Abdel H. El-Kafrawy   +3 more
openaire   +2 more sources

Synthesis of Modified Polycarboxylate Superplasticizer and Effect on Properties of Cement

Advances in Cement Research, 2022
In this work, polyether, acrylic acid and oleic acid were used as raw materials to synthesize oleic acid modified polycarboxylate superplasticizer (OA-PCE) by emulsion polymerization, and the synthesis process was optimized by orthogonal experiment.
Xiaoyu Zhang, W. Zhen, S. Guan, Junliang Chen   +3 more
semanticscholar   +1 more source

Punch shear strength of polycarboxylate cements

The Journal of Prosthetic Dentistry, 1978
Two general conclusions are drawn which apply to all the four commercial polycarboxylate cements: First, the effect of storage condition upon shear strength was much more pronounced after 24 hours than after 1 hour of storage time; second, the effect of storage condition was most extreme when the specimens were tested free of their matrices ...
Lincoln Steagall, José Fortunato Ferreira Santos, José Itamar M. Silveira   +2 more
openaire   +3 more sources