Thermo stabilisation of poly (butylene adipate-co-terephthalate)

Abstract

SbstractPoly (butylene adipate-co-terephthalate) -PBAT is a synthetic biodegradable polymer commonly used for plastic film production from neat polymer or nanocomposites. The PBAT is submitted to high temperatures and shear rate during its processing. In the present study, the thermo stabilisation of PBAT by the addition of two types of stabilisers was studied using a torque rheometer at 60 rpm and two levels of temperature. The stabilisers were used as master batches with a percentage of 10% by weight of additive in the PBAT. Molecular weight, torque values after 10 minutes of mixing, and absorbance at 400 nm were used to evaluate the process of stabilisation. The primary and secondary antioxidant used here had a positive effect on both processing temperatures, 180 and 200 °C. The best results indicate that the primary antioxidant could be used alone to protect PBAT against thermodegradation reactions.

New Biodegradable Materials for Re-Thought Packaging from Pre-Consumer Wastes by Controlling the Storage Time as Method to Increase the Mechanical Recycling Efficiency

“…The degradation during the processing of PBAT occurs via hydrolysis of the ester bond through a predominant mechanism of chain breakage and β-C-H hydrogen transfer. The process cannot be stopped by using a stabilizer, with drying being a safe way to control the destruction [ 46 ]. The presence of starch in the studied compounds increases the biodegradation rate by intensifying the hydrolysis reactions for both PCL and PBAT [ 47 , 48 , 49 , 50 , 51 ].…”

Recyclable and (Bio)degradable Polyesters in a Circular Plastics Economy

“…Their results demonstrated that the inclusion of antioxidants effectively maintained the molar mass and viscosity of PBAT during the reprocessing with a torque rheometer operated at 60 rpm and processing temperatures of 180 and 200 °C, highlighting the influence of oxygen in the degradation process. 381 Exploring other strategies, Scaffaro et al investigated the effect of incorporating organoclay into PBAT subjected to UV radiation. The resulting material exhibited enhanced polymer cross-linking and the formation of porous structures.…”

Influence of scutellaria baicalensis extract on the thermo‐oxidative and composting stability of poly(butylene adipate‐co‐terephthalate)

“…32 Moreover, synthetic antioxidants are used to improve the thermo-oxidative stability of PBAT, which mainly act on the deactivation of free radicals. 33 Based on the concept of environmental conservation and sustainable development, natural antioxidants have been considered as a safe and environmentally friendly alternative to synthetic ones. Several works have been reported on the antioxidant modification of PBAT by natural substances.…”

“…The addition of chain extenders can achieve equilibrium in degradation, chain extension, and branching, thereby enhancing the thermal stability of PBAT 32 . Moreover, synthetic antioxidants are used to improve the thermo‐oxidative stability of PBAT, which mainly act on the deactivation of free radicals 33 …”