Morphology and Properties of Thermoplastic Sugar Beet Pulp and Poly(butylene adipate-co-terepthalate) Blends

Abstract

In this work, sugar beet pulp (SBP), the residue remaining after sugar extraction, was first turned into a thermoplasticlike compound by extrusion in the presence of water and glycerol. The resulting thermoplastic SBP (TSBP) was then blended with poly(butylene adipate-co-terepthalate) (PBAT) and extruded into sheets in a single process. The effects of polymeric diphenyl methane diisocyanate (pMDI) as compatibilizer and TSBP content on rheological properties, phase morphology, mechanical properties, and water absorption of the extruded sheets were studied. In comparison, dried SBP powder was also blended with PBAT by extrusion. It was found that when SBP was used as a plastic in compounding, it yielded blends with much finer dispersion of the SBP phase than when SBP was used as a filler in compounding. The dispersion of SBP in the blends was greatly improved with the addition of pMDI. The PBAT/SBP blends with fine phase morphology showed enhanced mechanical properties and moisture resistance.

Influence of melt processing on biodegradable nisin‐PBAT films intended for active food packaging applications

“…This transition is attributed to the motion of poly(butylene adipate) units, the flexible aliphatic domain. The second one, at 50°C is ascribed to the motion of poly(butylene terephthalate) units, which is a rigid aromatic domain …”

“…The second one, at 508C is ascribed to the motion of poly(butylene terephthalate) units, which is a rigid aromatic domain. 54,55 Mechanical Properties The mechanical properties of PBAT and PBAT/nisin samples are shown in Table III. Young's modulus (E), tensile strength (r) and deformation at break (e) were determined.…”

Nanoclay‐reinforced poly(butylene adipate‐co‐terephthalate) biocomposites for packaging applications

“…Tan δ curve shows two peaks at around −20°C and around 50°C. The first peak is ascribed to the motion of poly(butylene adipate) units and is normally associated to the glass transition, and the second peak is ascribed to the motion of poly(butylene terephthalate) units [23, 25]. By the addition of clay, the glass transition temperature T g of PBAT is increased very slightly.…”

Biodegradable composites from polyester and sugar beet pulp with antimicrobial coating for food packaging

“…Composite thermoplastics, PLA/TSBP and PBAT/TSBP, were prepared by converting SBP to TSBP followed by co‐extrusion with PLA or PBAT 15, 16. Briefly, SBP was first mixed with glycerol and water (5 : 1 : 1; w/w) by blending the three parts in a kitchen mixer, and stored in sealed plastic bags at room temperature for at least 8 h. This formulated SBP was then extruded to obtain thermoplastic SBP (TSBP) using a corotating twin‐screw extruder (Leistritz ZSE‐18).…”

“…Recently, we converted SBP to a thermoplastic‐like material (TSBP), and then coextruded it with either PLA or PBAT to obtain novel biodegradable composites,15, 16 PLA/TSBP, and PBAT/TSBP. The composites thus prepared can retain the mechanical properties of their parent plastics, even at higher SBP contents up to at least 50% by weight.…”