The oxygen permeability of composite materials, consisting of a LDPE substrate coated with a thin layer (0.7–1 lm) of new hybrid organic/inorganic materials based on SiO2 and PE-PEG block copolymers, has been characterized at 35 and 50 C. The effect of adding a second organic component capable to form hydrogen bonds, namely either poly(4-hydroxystyrene) (PHS) or malic acid, has been studied. While the addition of PHS leads to a further significant decrease (50–70%) of the oxygen permeability both at 35 and 50°C , on the contrary, the addition of malic acid leads to poorer barrier properties. A slight decrease of the permeability was obtained after plasma treatment of the LDPE surface.
M. Toselli, F. Pilati, M. Marini, F. Doghieri, M.G. De Angelis, M. Minelli (2008). Oxygen permeability of novel organic–inorganic coatings: II. Modification of the organic component with a hydrogen-bond forming polymer. EUROPEAN POLYMER JOURNAL, 44, 3256-3263 [10.1016/j.eurpolymj.2008.07.037].
Oxygen permeability of novel organic–inorganic coatings: II. Modification of the organic component with a hydrogen-bond forming polymer
TOSELLI, MAURIZIO;DOGHIERI, FERRUCCIO;DE ANGELIS, MARIA GRAZIA;MINELLI, MATTEO
2008
Abstract
The oxygen permeability of composite materials, consisting of a LDPE substrate coated with a thin layer (0.7–1 lm) of new hybrid organic/inorganic materials based on SiO2 and PE-PEG block copolymers, has been characterized at 35 and 50 C. The effect of adding a second organic component capable to form hydrogen bonds, namely either poly(4-hydroxystyrene) (PHS) or malic acid, has been studied. While the addition of PHS leads to a further significant decrease (50–70%) of the oxygen permeability both at 35 and 50°C , on the contrary, the addition of malic acid leads to poorer barrier properties. A slight decrease of the permeability was obtained after plasma treatment of the LDPE surface.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
