Radiolytic modification of polymer filler for cement compositions

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Abstract

The influence of preliminary irradiation (3 MeV electron beam) of powdered (≤0.2 mm) synthetic polymers (polyethylene, polypropylene, polyvinyl chloride, polycarbonate, polyethylene terephthalate, or polystyrene) on the compressive strength of cement-sand-polymer compositions has been studied. The surface oxidation of the powders was ensured by irradiation in air or in a water-air mixture. It is shown that the oxidation of the powder in an aqueous medium, as well as the post-radiation alkalization of the powders, contribute to a higher strength of the composites. Oxidation of the powder in air leads to a relative decrease in the strength of the composite due to a higher yield of acid formation.

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About the authors

E. M. Kholodkova

A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences

Email: ponomarev@ipc.rssi.ru
Russian Federation, Leninsky prospekt 31(4), Moscow, 119071

Yu. M. Nevolin

A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences

Email: ponomarev@ipc.rssi.ru
Russian Federation, Leninsky prospekt 31(4), Moscow, 119071

A. V. Shapagin

A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences
Leninsky prospekt 31(4), Moscow, 119071 Russia

Email: ponomarev@ipc.rssi.ru
Russian Federation, A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences Leninsky prospekt 31(4), Moscow, 119071

O. Yu. Grafov

A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences

Email: ponomarev@ipc.rssi.ru
Russian Federation, Leninsky prospekt 31(4), Moscow, 119071

A. V. Ponomarev

A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences

Author for correspondence.
Email: ponomarev@ipc.rssi.ru
Russian Federation, Leninsky prospekt 31(4), Moscow, 119071

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Supplementary files

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2. Fig. 1. Compressive strength s for CPPK as a function of [P] content and processing mode of HDPE powder. Similar dependences are observed for PP, PS and PET powders.

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3. Fig. 2. Compressive strength  for CPPK as a function of [p] content and treatment mode of LDPE powder. Similar dependencies are observed in the case of PVC and PC powders.

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4. Scheme

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5. Fig. 3. G yields of carboxyl group formation and total yields of oxygen-containing groups on the surface of the films.

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6. Fig. 4. IR spectra of PS and HDPE before (powders) and after (films) radiolytic oxidation.

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