LLDPE-based nanocomposites undergo faster photo-oxidation than the unfilled matrix and the extent of their physical properties deterioration, namely elongation at break and tensile strength, is dependent on the organo-nanoclay loading. The observed acceleration is not due to faster photo-oxidation but rather due to a reduction of the oxidation induction time. The presence in the organoclays of trace amounts of metal ions may be promoting catalytic photodegradation. While UV absorbers provide useful protection, use of a metal deactivator has been found to greatly enhance the photo-stability of the LLDPE-based nanocomposites. Combinations of a metal deactivator and UVabsorber yield synergistic effects.
LA MANTIA, F.P., DINTCHEVA, N.T., MALATESTA, V., PAGANI, F. (2006). Improvement of photo-stability of LLDPE-based nanocomposites. POLYMER DEGRADATION AND STABILITY, 91, 3208-3213 [doi:10.1016/j.polymdegradstab.2006.07.014].
Improvement of photo-stability of LLDPE-based nanocomposites
LA MANTIA, Francesco Paolo;DINTCHEVA, Nadka Tzankova;
2006-01-01
Abstract
LLDPE-based nanocomposites undergo faster photo-oxidation than the unfilled matrix and the extent of their physical properties deterioration, namely elongation at break and tensile strength, is dependent on the organo-nanoclay loading. The observed acceleration is not due to faster photo-oxidation but rather due to a reduction of the oxidation induction time. The presence in the organoclays of trace amounts of metal ions may be promoting catalytic photodegradation. While UV absorbers provide useful protection, use of a metal deactivator has been found to greatly enhance the photo-stability of the LLDPE-based nanocomposites. Combinations of a metal deactivator and UVabsorber yield synergistic effects.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
