Naslov
Thermally stimulated depolarization study of natural rubber and polystyrene mixtures

Autori
Topić, Mladen ; Veksli, Zorica

Izvornik
Polymer (0032-3861) 34 (1993), 10; 2118-2121

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
thermally stimulated depolarization; glass transition; mixtures; interface; activation energy distribution; natural rubber; polystyrene

Sažetak
The glass transition of natural rubber (NR) in a mixture with polystyrene (PS) was investigated by global thermally stimulated depolarization current (t.s.d.c.) measurements and by the partial polarization technique. The experiments were carried out on samples with different NR/PS ratios and different PS particle dispersion. The activation energy (E(alpha)) and the approximate number of dipoles (N) which take part in alpha relaxation were determined. A simple method for approximating the N(E(alpha)) distribution was proposed. The results show that the presence of PS significantly decreases N as well as the width of the distribution. The agglomeration of PS particles reduces their activity. The specific influence of PS is expressed most at low PS concentrations. The results confirm the existence of attractive interactions at the NR-PS interfaces.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA