The dispersion of phyllosilicates into polymer or blends at nanometer scale [1] allows improving the properties of the polymer matrix [2] including thermal stability and flame retardancy .Indeed the dispersion of nanoclays favors char formation on the burning surface [3]. Poly(ethylene terephthalate) (PET), which is one of the most diffused polymers, is used in a wide variety of applications. PET-based nanocomposites which contain phyllosilicates are considered superior for providing improved gas barrier properties, due mainly to the strong effect of confinement as the result of a high surface: volume ratio (i.e., reducing chain mobility and permeability [4]), as well as to the enhancement of tortuosity [5] of the path required for small molecules to permeate through the polymer film due to the presence of silicate lamellae. Flame retardancy and gas barrier functions are much-required properties in the area of textiles and civil engineering, the main aim being to develop fabrics or security panels and interior decorations with flame self-extinguishing properties [6]. PET based micro-composites can also show flame estinguishing properties when filled with phosphorous derivatives which are quite effective for imparting flame estinguishig properties to PET blends [7]. In the present contribution some insights on the preparation of PET nanocomposites with modified nanosilicates (dellite) and ipophosphite based microcomposites are reported.
POLYESTER BLENDS NANOCOMPOSITES AND COMPOSITES WITH INCREASED THERMAL STABILITY OR FLAME ESTINGUISHING PROPERTIES
COLTELLI, MARIA BEATRICE;CASTELVETRO, VALTER;CIARDELLI, FRANCESCO
2014-01-01
Abstract
The dispersion of phyllosilicates into polymer or blends at nanometer scale [1] allows improving the properties of the polymer matrix [2] including thermal stability and flame retardancy .Indeed the dispersion of nanoclays favors char formation on the burning surface [3]. Poly(ethylene terephthalate) (PET), which is one of the most diffused polymers, is used in a wide variety of applications. PET-based nanocomposites which contain phyllosilicates are considered superior for providing improved gas barrier properties, due mainly to the strong effect of confinement as the result of a high surface: volume ratio (i.e., reducing chain mobility and permeability [4]), as well as to the enhancement of tortuosity [5] of the path required for small molecules to permeate through the polymer film due to the presence of silicate lamellae. Flame retardancy and gas barrier functions are much-required properties in the area of textiles and civil engineering, the main aim being to develop fabrics or security panels and interior decorations with flame self-extinguishing properties [6]. PET based micro-composites can also show flame estinguishing properties when filled with phosphorous derivatives which are quite effective for imparting flame estinguishig properties to PET blends [7]. In the present contribution some insights on the preparation of PET nanocomposites with modified nanosilicates (dellite) and ipophosphite based microcomposites are reported.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
