The rheological properties of coal bitumens modified by polyesters.

W. Ciesińska

doi:10.14314/polimery.2015.144

Published : 2015-02-28

Vol. 60 No. 2 (2015)

The rheological properties of coal bitumens modified by polyesters.

W. Ciesińska

DOI: https://doi.org/10.14314/polimery.2015.144

Abstract

The purpose of testing was to find changes of rheological properties of coal-tar pitch (CTP) due to modification with chosen polyesters. Poly(ethylene terephthalate) (PET), unsaturated polyester resin (UP) and polycarbonate (PC) were selected for testing. Polymers, in the amounts of 10 and 25 wt %, were mixed with CTP under conditions considered optimal for each modifier type. Properties of CTP-polymer compositions were assessed based on their softening point, content of components insoluble in toluene and quinoline and on rheological properties. Distinct changes of rheological properties, especially changes in viscosity versus shear rate and temperature, as well as viscoelastic properties were observed as results of modifications with all used polyesters. The modification effects became more intensive with increasing amount of the modifier added to CTP.

Keywords

coal-tar pitch ; polyesters ; modification ; rheological properties pak węglowy ; poliestry ; modyfikacja ; właściwości reologiczne

The rheological properties of coal bitumens modified by polyesters.

Abstract

Keywords

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