In this paper the formation of a partially ordered amorphous phase in PET/precipitated calcium carbonate (PCC) nanocomposites is highlighted and its effects on physical properties are discussed. PET/PCC nanocomposites are prepared by melt mixing, using an anhydride-modified PET (TPET) coupling agent synthesized on purpose. The effect of TPET/PCC interactions on PET amorphous phase conformation is revealed by solid state NMR and further investigated realizing a model of polymer/filler interface, by adsorbing TPET onto PCC. As a consequence of the interactions with the inorganic surface, the adsorbed polymer forms a trans-rich amorphous phase unable to crystallize. Addition of TPET also leads to an increase in the glass transition temperature and a reduction in the oxygen permeability of the nanocomposites. �� 2012 Elsevier Ltd. All rights reserved.
Polymer-filler interactions in PET/CaCO3 nanocomposites: Chain ordering at the interface and physical properties / R., Avolio; G., Gentile; M., Avella; Carfagna, Cosimo; M., Errico. - In: EUROPEAN POLYMER JOURNAL. - ISSN 0014-3057. - 49:(2013), pp. 419-427. [10.1016/j.eurpolymj.2012.10.008]
Polymer-filler interactions in PET/CaCO3 nanocomposites: Chain ordering at the interface and physical properties
CARFAGNA, COSIMO;
2013
Abstract
In this paper the formation of a partially ordered amorphous phase in PET/precipitated calcium carbonate (PCC) nanocomposites is highlighted and its effects on physical properties are discussed. PET/PCC nanocomposites are prepared by melt mixing, using an anhydride-modified PET (TPET) coupling agent synthesized on purpose. The effect of TPET/PCC interactions on PET amorphous phase conformation is revealed by solid state NMR and further investigated realizing a model of polymer/filler interface, by adsorbing TPET onto PCC. As a consequence of the interactions with the inorganic surface, the adsorbed polymer forms a trans-rich amorphous phase unable to crystallize. Addition of TPET also leads to an increase in the glass transition temperature and a reduction in the oxygen permeability of the nanocomposites. �� 2012 Elsevier Ltd. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
