Solid-State NMR Study of Poly(3-Hydroxybutyrate) and Ecoflex reser Blends

Abstract

Biodegradable blends of poly(3-hydroxybutyrate) and aromatic-aliphatic co-polyester Ecoflex ® were studied by means of basic solid-state NMR techniques.13 C NMR spectra pointed at existence of individual components in blends, however, existence of regions in which components affect each other was also deduced from changes of shape of some spectral lines. Analysis of proton spin-lattice relaxation process in laboratory frame running in blends with different fractions of components revealed poor miscibility of these polymers. The domain size of components was calculated based on the values of spin-lattice relaxation times in laboratory frame. Spin-lattice relaxation process in the rotating frame of Ecoflex ® proton spin system was only slightly influenced by the blending. Incompatibility of these polymers was confirmed by all realized experiments.

Use of a chain extender as a dispersing agent of the CaCO3 into PBAT matrix

“…Nuclear magnetic resonance spectroscopy 26 The CE spectra presented the chain segment of epoxy propane ether, which is also potential interacting sites, around 45 ppm. 5 Furthermore, 13 C solid-state NMR shows no degradation of the structure of the PBAT or CE in the PBAT/CE.…”

Polyhydroxybutyrate: a review of experimental and simulation studies of the effect of fillers on crystallinity and mechanical properties

“…Because of the steric constraints resulting from part of the polymer chain being incorporated in the crystallites, the rigid amorphous phase is in the glassy state, [94][95][96] characterised by a different conformation of the polymer chains compared to mobile amorphous phase. 95,[97][98][99][100] The fraction of rigid amorphous phase is dependent on the internal properties of polymer chains (flexibility), crystallisation conditions (temperature) and properties of the created crystals (size, degree of irregularity of the lamellar crystal stacking, crystal morphology). 101,102 Overall, the amorphous region is characterised by the presence of only short-range order, and this irregular arrangement results in density changes compared to a crystalline region.…”

Influence of Gamma Radiation on the Properties of Biodegradable PBAT – Poly (butylene Adipate co‐terephthalate) Active Films with Orange Essential Oil

“…Packaging can be produced from several polymers and PBAT ‐ poly (butylene adipate co‐terephthalate), developed by BASF under the commercial name ECOFLEX has been increasingly studied [ 4–6 ] as a viable substitute in the manufacturing of food packaging because of its good processability for film formation, [ 7 ] being, thus, an alternative for the usage as active packaging, [ 8 ] among them, antimicrobial active packaging.…”