During the last ten years, great attention has been paid to the effects of interfaces and geometrical confinement on the polymer molecular dynamics1,2,3. One of the characteristic parameters describing the glass transition is the cooperativity length, providing the average dimension of the alpha relaxation process. To investigate the cooperativity length from calorimetric measurements, the Donth's approach 4,5 is the most appropriated. In this work we propose to study polylactide-based nanocomposites with the presence of polybutyrate adipate terephthalate (PBAT) compatibilizer. Polylactide (PLA) is a semi-crystalline polymer which thermal crystallization can easily be tailored due to its slow kinetic, and can induce different crystalline forms (? and ?) depending on the crystallization temperature6,7. This study aims at picturing the dissociated or cumulated impact of compatibilization and crystallization on the characteristic parameters describing the amorphous phase as the cooperativity length
Calorimetric investigations on semi-crystalline compatibilized polylactide/clay nanocomposites
F Cicogna;W Oberhauser;L Conzatti;E Passaglia;
2015
Abstract
During the last ten years, great attention has been paid to the effects of interfaces and geometrical confinement on the polymer molecular dynamics1,2,3. One of the characteristic parameters describing the glass transition is the cooperativity length, providing the average dimension of the alpha relaxation process. To investigate the cooperativity length from calorimetric measurements, the Donth's approach 4,5 is the most appropriated. In this work we propose to study polylactide-based nanocomposites with the presence of polybutyrate adipate terephthalate (PBAT) compatibilizer. Polylactide (PLA) is a semi-crystalline polymer which thermal crystallization can easily be tailored due to its slow kinetic, and can induce different crystalline forms (? and ?) depending on the crystallization temperature6,7. This study aims at picturing the dissociated or cumulated impact of compatibilization and crystallization on the characteristic parameters describing the amorphous phase as the cooperativity lengthI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
