Bio-based aliphatic polyesters have attracted the scientific and industrial interest due to the combination of biodegradability, biocompatibility and their physical and/or chemical properties, which are, in many cases, comparable to the respective properties of more common and widely utilized polymers. Moreover, polymer dynamics in the bulk and under confinement, is of great interest both because it greatly affects many of their macroscopic properties and because of the complexity it exhibits over many length- and time-scales. The structure and the dynamics of two bio-based polyester polyols are investigated in the bulk and close to surfaces in polymer/layered silicate nanocomposites. The morphology of the neat polymers as well as the structure of the nanohybrids are investigated with X-ray diffraction and their thermal properties are studied by differential scanning calorimetry. One of the investigated polyesters is amorphous whereas the second one is a semi-crystalline polymer with an intriguing thermal behavior. Hybrids have been synthesized over a broad range of compositions and intercalated structures are always obtained.
Biobased Polyesters in the Bulk and Under Confinement
M Labardi;
2019
Abstract
Bio-based aliphatic polyesters have attracted the scientific and industrial interest due to the combination of biodegradability, biocompatibility and their physical and/or chemical properties, which are, in many cases, comparable to the respective properties of more common and widely utilized polymers. Moreover, polymer dynamics in the bulk and under confinement, is of great interest both because it greatly affects many of their macroscopic properties and because of the complexity it exhibits over many length- and time-scales. The structure and the dynamics of two bio-based polyester polyols are investigated in the bulk and close to surfaces in polymer/layered silicate nanocomposites. The morphology of the neat polymers as well as the structure of the nanohybrids are investigated with X-ray diffraction and their thermal properties are studied by differential scanning calorimetry. One of the investigated polyesters is amorphous whereas the second one is a semi-crystalline polymer with an intriguing thermal behavior. Hybrids have been synthesized over a broad range of compositions and intercalated structures are always obtained.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
