Radiolytic modification of polymer filler for cement compositions

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Аннотация

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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Авторлар туралы

E. Kholodkova

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

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

Yu. Nevolin

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

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

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

O. Grafov

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

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

A. Ponomarev

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

Хат алмасуға жауапты Автор.
Email: ponomarev@ipc.rssi.ru
Ресей, Leninsky prospekt 31(4), Moscow, 119071

Әдебиет тізімі

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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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