نتایج جستجو برای: polycarboxylate ether

تعداد نتایج: 22000  

2014
Tailong Zhang Jianming Gao Bing Qi Yanling Liu

A new kind of retarding polycarboxylate superplasticizer (M20S80) was prepared through the modification of black liquor and polycarboxylate superplasticizer (S) through an Fe-H2O2 reaction system. The synthesis process of M20S80 was introduced. Infrared spectrum analysis (FT-IR) was used to investigate the changes in functional groups in M20S80. At the same time, a mixture of LM20S80 was made b...

Journal: :The Angle orthodontist 1996
D P Wood G J Paleczny L N Johnson

A variety of luting cements are available for use with orthodontic bands. This in vitro study was conducted to evaluate the force required to cause debanding when zinc phosphate, polycarboxylate and glass ionomer cements are used as the luting agents; and to determine whether sandblasting the inner surface of orthodontic bands affects the force required to deband. The data were obtained by deba...

Journal: :Düzce Üniversitesi bilim ve teknoloji dergisi 2021

Self-compacting concretes (SCC), a new type of concrete, were realized with the development polycarboxylate-based chemical additives. The interaction these additives powder materials in nano and micro scales affects fresh hardened properties concrete meso macro scales. To change improve macro-dimensional it is necessary to better analyze nano-micro-dimensional interaction. aim this study examin...

2018
Wu-Jian Long Hao-Dao Li Chang-Le Fang Feng Xing

The properties of graphene oxide (GO)-based cement paste can be significantly affected by the state of GO dispersion. In this study, the effects of uniformly dispersed and re-agglomerated GO on the rheological, mechanical properties and microstructure of cement paste were systematically investigated. Two distinct dispersion states can be achieved by altering the mixing sequence: Polycarboxylate...

Journal: :journal of dentistry, tehran university of medical sciences 0
h. hajmiragha associate professor, department of prosthodontics, school of dentistry, tehran university of medical s. nokar associate professor, department of prosthodontics, school of dentistry, tehran university of medical m. alikhasi assistant professor, department of prosthodontics, school of dentistry, tehran university of medical s. nikzad assistant professor, department of prosthodontics, school of dentistry, tehran university of medical h. dorriz assistant professor, department of prosthodontics, school of dentistry, tehran university of medical

objective: the purpose of this study was to evaluate the solubility of three luting cements in artificial saliva. materials and methods: twenty disks (10×4 mm) of polycarboxylate, zinc phosphate and glass ionomer cements were prepared according to manufactures’ instructions. after setting, they were desiccated and each ten specimens were immersed in artificial saliva with special ph (3 or 5), c...

Journal: :Construction and Building Materials 2022

• Magneto-responsive rheology of highly flowable cement paste with PCE is studied. Flowable magnetic particles and can exhibit MR response. increases relative effect while slightly decreases absolute effect. Applying field plays a major role in stiffness for PCE. Magneto-rheology control, by means adding magnetizable applying field, potential approach to satisfy the contradicting requirements f...

2007
Filiz KEYF

Results: All materials tested demonstrated different degrees of sorption and solubility. The glass ionomer cement had the best value for sorption. The zinc oxide eugenol and eugenol free cements had lower water sorption than the zinc polycarboxylate and zinc phosphate cements were evaluated. Some materials retained water in their structure and thus compensated for any loss of mass due to dissol...

Journal: :Construction and Building Materials 2022

Belite-Ye’elimite-Ferrite (BYF) cements have received increasing attention in view of their lower CO2 footprint and interesting performances. This work deals with the effect polycarboxylate superplasticizer (SP) on BYF cement paste. It was found that SP dosage must be low order to avoid destabilization, thus improve resistance bleeding segregation. Also, good affinity polycarboxylate-based surf...

Journal: :Chemical communications 2015
S Wongsakulphasatch F Nouar J Rodriguez L Scott C Le Guillouzer T Devic P Horcajada J-M Grenèche P L Llewellyn A Vimont G Clet M Daturi C Serre

The scalable and environmentally-friendly synthesis of mixed Fe(III)/M(II) (M = Ni, Co, Mg) polycarboxylate porous MOFs based on the Secondary Building Unit approach is reported. A combination of in situ infrared spectroscopy, (57)Fe Mössbauer spectrometry and adsorption microcalorimetry confirms the direct accessibility of the iron(III) and metal(II) sites under low temperature activation cond...

Journal: :Australian orthodontic journal 1973
N Sakai

THE CHALLENGE OF GROSS MALOCCLUSIONS WITH THE BEGG TECHNIQUE Sakai . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 A LABORATORY INVESTIGATION OF THE BOND STRENGTHS OF SOME DENTAL CEMENTS. INCLUDING THREE ZINC POLYCARBOXYLATE CEMENTS .... M a n n i n g . . . . . . . . . . .... .... . . . . . . 94 ORTHODONTIC EDUCATION IN THE UNITED STATES Grewe. Freer and Little . . . . . . EDITORIAL ...

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