Ricardo Acosta, Maricela García, Alfredo Rosales
Apr 1, 1996
Citations
0
Influential Citations
6
Citations
Journal
Polymer Degradation and Stability
Abstract
Abstract Six novel additives have been synthesised by substitution of benzophenone in the 4-position with 2-hydroxybenzophenone or 4-amino-2,2,6,6-tetramethyl piperidine groups. The spacing between the chromophores was varied by alkyl groups of n = 4, 6 and 8 CH 2 units. The additives were incorporated into polyethylene and the rates of thermal and photo-oxidation monitored using FTIR spectroscopy. The data show a number of interesting features that appear to be dependent not only on the nature of the stabiliser moiety but also the value of n . Their behaviour is compared with mixed compositions based on benzophenone with 2-hydroxy-4-octoxybenzophenone and 2,2,6,6-tetramethyl-4-piperidinyl sebacate. The possibility of these compounds for the control of thermal and photo-oxidation of polyolefins is discussed.