TY - JOUR
T1 - Novel strategic approach for the thermo- and photo- oxidative stabilization of polyolefin/clay nanocomposites
AU - Arrigo, Rossella
AU - Morici, Elisabetta
AU - Dintcheva, Nadka Tzankova
AU - Dintcheva, Nadka Tzankova
AU - Al-Malaika, Sahar
PY - 2017
Y1 - 2017
N2 - Polyolefin/clay nanocomposites were prepared by melt mixing and their oxidative stability was studied under long-term thermo- and photo-oxidative test conditions in the absence and presence of a modified organo montmorillonite clay (OM-MMt) containing a chemically-bound hindered phenol antioxidant function, (AO)OM-Mt. It was found that nanocomposites based on both polyethylene (PE) and polyethylene-grafted-maleic anhydride (PEgMA) containing the (AO)OM-Mt gave a higher oxidative stability, along with better clay dispersion, compared to analogous PE or PEgMA-based nanocomposites containing an added (free) conventional antioxidant with a similar hindered phenol function (using the commercial hindered phenol Irganox®1076). These findings can be explained in terms of the ability of the organo-modifier containing the in-built antioxidant function to act locally at the interface between the clay silicate layers and the polymer macromolecules thus contributing to the improved stability of the polymer observed both during long-term thermal- and photo-oxidative treatments.
AB - Polyolefin/clay nanocomposites were prepared by melt mixing and their oxidative stability was studied under long-term thermo- and photo-oxidative test conditions in the absence and presence of a modified organo montmorillonite clay (OM-MMt) containing a chemically-bound hindered phenol antioxidant function, (AO)OM-Mt. It was found that nanocomposites based on both polyethylene (PE) and polyethylene-grafted-maleic anhydride (PEgMA) containing the (AO)OM-Mt gave a higher oxidative stability, along with better clay dispersion, compared to analogous PE or PEgMA-based nanocomposites containing an added (free) conventional antioxidant with a similar hindered phenol function (using the commercial hindered phenol Irganox®1076). These findings can be explained in terms of the ability of the organo-modifier containing the in-built antioxidant function to act locally at the interface between the clay silicate layers and the polymer macromolecules thus contributing to the improved stability of the polymer observed both during long-term thermal- and photo-oxidative treatments.
KW - Clay Polymer Nanocomposites (CPN)
KW - Condensed Matter Physics
KW - Hindered phenols
KW - Materials Chemistry2506 Metals and Alloys
KW - Mechanics of Materials
KW - Polymers and Plastics
KW - Polyolefins
KW - Stabilised organo montmorillonite
KW - Thermo- and photo- oxidative stabilization
KW - Clay Polymer Nanocomposites (CPN)
KW - Condensed Matter Physics
KW - Hindered phenols
KW - Materials Chemistry2506 Metals and Alloys
KW - Mechanics of Materials
KW - Polymers and Plastics
KW - Polyolefins
KW - Stabilised organo montmorillonite
KW - Thermo- and photo- oxidative stabilization
UR - http://hdl.handle.net/10447/260130
M3 - Article
VL - 145
SP - 41
EP - 51
JO - Polymer Degradation and Stability
JF - Polymer Degradation and Stability
SN - 0141-3910
ER -