Improvement of photo-stability of LLDPE-based nanocomposites
- Authors: LA MANTIA, FP; DINTCHEVA, NT; MALATESTA, V; PAGANI, F
- Publication year: 2006
- Type: Articolo in rivista
- OA Link: http://hdl.handle.net/10447/17133
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.