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1

Galactose monoacrylate as a new monomer in gelcasting process

Szudarska A., Mizerski T., Szafran M.

Archives of Metallurgy and Materials

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2011

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Vol. 56, iss. 4

1211-1215

EN

The present work shows the results of following the recently developed trend to design new low toxic monomers which can be applied in gelcasting process. New compound, 6-O-acryloyl-D-galactose (galactose monoacrylate) has been synthesised and its effectiveness as processing agent has been studied. The results are compared with those reported so far regarding applying some other new monomers - 3-O-acryloyl-D-glucose and glycerol monoacrylate in gelcasting technology. The influence of spatial structure of obtained monomers on rheological properties of alumina suspensions and properties of green bodies is discussed as well.

PL

Artykuł przedstawia wyniki badań dotyczących zastosowania nowozsyntezowanej akrylowej pochodnej galaktozy jako monomeru w procesie odlewania żelowego. Opracowano metode syntezy 6-O-akryloilogalaktozy oraz zbadano jej role i efektywność w procesie. Wyniki porównano z wcześniejszymi pracami z tego zakresu, dotyczącymi zastosowania innych nowych nietoskycznych monomerów – 3-O-akryloiloglukozy oraz monoakrylanu glicerolu, szukając wpływu budowy przestrzennej cząsteczek monomeru na właściwości reologiczne mas lejnych z tlenku glinu i właściwosci odlanych z nich wyrobów.

2

Dodatki organiczne we współczesnej ceramice - cz. I

Wiśniewski P.

Szkło i Ceramika

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2008

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R. 59, nr 1

9-14

PL

W artykule przedstawiono podstawowe informacje dotyczące dodatków organicznych stosowanych w nowoczesnej technologii ceramiki, tj. plastyfikatory, upłynniacze czy spoiwa polimerowe. W pracy będącej przeglądem literatury szczególną uwagę skupiono na właściwościach spoiw polimerowych i różnicach pomiędzy spoiwami wodorozcieńczalnymi (dyspersjami polimerowymi) a spoiwami wodorozpuszczalnymi tj. poli(alkohol winylowy).

EN

In this paper fundamental informations related organic additives in modern ceramic technology i.e. plasticizers, deflocculants and polymeric binders were presented. In literature review attention has been focused on parameters of polymeric binders and differences between water thinnable (polymeric dispersions) and water soluble i.e. poly(vinyl alcohol).

3

Rheological properties of calcium carbonate concentrated suspensions: effects of solid content and dispersant concentration

Papo A., Piani L.

Applied Mechanics and Engineering

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1999

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Vol. 4, no spec.

393-397

EN

The aim of the present work is to study the flow behaviour of calcium carbonate suspensions in order to determine the effectiveness of some commercial dispersing agents. Three commercial deflocculants were used: a sodium polyphosphate, a sodium salt of benzenedisulfonic acid, and a sodium polyacrylate. Calcium carbonate aqueous suspensions were prepared at various solid volume fractions (0.31 to 0.46). Rheological tests were carried out at 25oC by using the rate controlled coaxial cylinder viscometer Rotovisko-Haake 20, system M5-osc., measuring device MV1P with serrated surfaces. The tests were performed under both continuous and oscillatory flow conditions. All the suspensions prepared without deflocculant show a rheological behaviour of the shearthinning type; good correlations between relative viscosity and shear rate data were found by applying the Quemada model. The application of both static and oscillatory techniques permitted to evaluate the efficiency of dispersing agents. The sodium polyacrylate proved to be the most effective deflocculant for calcium carbonate slurries; the highest efficiency of sodium polyacrylate can be explained on the basis of its polymeric nature.