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

Chaves, Rodrigo Paulino; Fechine, Guilhermino J. M.

doi:10.1590/0104-1428.2196

Cited by 13 publications

(7 citation statements)

References 12 publications

(13 reference statements)

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“…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 ].…”

Section: Discussionmentioning

confidence: 99%

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

et al. 2023

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The influence of storage conditions on the mechanical recycling of pre-consumer waste (PRE-CW) from the manufacture of multilayer packaging films starting from starch compounds using a renewable-based polymer with PCL and PBAT, which are biodegradable conventional-based polyesters, was studied. It was found that, unlike materials based on conventional-origin polymers that accumulate in the environment for hundreds of years, the studied compounds degraded, even in the solid state, duringstorage in unventilated spaces and during the rainy hot summers with alternatingheat and rain. The degradation of the mechanically recycled compounds obtained from PRE-CW stored in such conditions was highlighted by the comparative analysis with the primary compounds, which proved the following: specific FTIR spectra changes; 2–3-times higher melt fluidity than for primary compounds; melting in successive processes over the entire positive temperatures range, up to 115 °C, such as in cases of compositional de-mixing of incompatible blends, faced to a single melting endotherm with a maximum at around 120 °C for the primar thermal degradation with the movement of the main destruction stages towards higher temperatures; a high quantity residue at 750 °C in air; dispersed mechanical resistance properties y compounds; crystallization at temperatures 10 °C–15 °C higher. The elimination of storage before the mechanical recycling of the pre-consumer waste from this type of polymeric compound fabrication is a way to increase the mechanical recycling efficiency while obtaining new materials with functional properties required by the applications.

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Section: Discussionmentioning

confidence: 99%

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

et al. 2023

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“…4 Furthermore, PBAT can be processed using conventional equipment such as mixers, extruders, and injection molding machines, rendering this polymer highly promising for various packaging applications. 5 However, PBAT biodegradability reduces its mechanical resistance, 6 leading to several disadvantages in its use. The oxidative chain scission during storage and after processing determines PBAT degradation.…”

Section: Introductionmentioning

confidence: 99%

Characterization of extruded films based on poly (butylene succinate) blends to utilize a partially degraded poly (butylene adipate‐co‐terephthalate)

Conceição,

Lemos,

Santana

et al. 2024

J of Applied Polymer Sci

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Polymer blends can improve material processability and can be used to extrude partially degraded materials, such as expired poly (butylene adipate‐co‐terephthalate) (PBAT), which cannot be normally extruded. Therefore, in this study, the extrudability of PBAT that has passed its expiration date was restored by blending it with poly (butylene succinate) (PBS). Various polymer blends were extruded and characterized to achieve high‐efficiency extrusion. The carbonyl indices in partially degraded PBAT and the corresponding control sample detailed the effects of 98 months of aging on molecular properties. The semicrystalline structure consisted of a mixed ordered arrangement of PBS and PBAT chains dispersed in an amorphous matrix. The microscopic images of the surfaces of the polymer films revealed defects and roughness, followed by an increase in the PBAT concentration in blends. Changes in mechanical properties and water vapor permeability correlated with the PBAT concentration in the blends. To avoid polymer loss, we reported a simple method for using PBAT that has passed its expiration date and cannot be extruded. The results revealed that the polymer films could be used in the packaging industry, especially in food and agricultural sectors.

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“…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.…”

Section: Introductionmentioning

confidence: 99%

“…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 …”

Section: Introductionmentioning

confidence: 99%

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

Li,

Kong,

Zhang

et al. 2023

Vinyl Additive Technology

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Scutellaria baicalensis extract (SBE), as a natural phenolic antioxidant, was added to poly(butylene adipate‐co‐terephthalate) (PBAT) matrix. With the addition of SBE, both the short‐term and long‐term antioxidant activity of PBAT samples noticeably improved. The results showed that the oxidation onset temperature (OOT) value of the modified sample (PBAT‐SBE2.5 sample) is increased by 62°C versus neat PBAT. Compared with neat PBAT with decreased OOT value after 240 days of storage, the OOT values of modified samples showed no significant change after long‐term storage. The excellent antioxidant activity is attributed to the high total phenolic content in SBE, which provides significant free radical scavenging efficiency. Additionally, the introduction of SBE could effectively enhance the processing performance of the PBAT matrix, the melt flow rate of PBAT‐SBE2.5 increased by ca. 42.6%. Compared with neat PBAT, the addition of SBE has no obvious effect on the mechanical properties of the matrix, the tensile strength remains unchanged and the elongation at break of PBAT‐SBE2.5 retains 74%. Composting degradation experiment indicated that the SBE promoted the degradation of PBAT. Moreover, SBE could reduce the surface hydrophilic tendency of the film materials. All results reveal that SBE was a good natural multifunctional stabilizer for PBAT.Highlights SBE shows high total phenolic content and free radical scavenging activity. SBE improves the short‐term and long‐term antioxidant activity of PBAT. The addition of SBE promoted the degradation of PBAT films. SBE could effectively enhance the processing performance of the PBAT matrix.

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

Cited by 13 publications

References 12 publications

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

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

Characterization of extruded films based on poly (butylene succinate) blends to utilize a partially degraded poly (butylene adipate‐co‐terephthalate)

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

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