Reactive biodegradable extruded blends of thermoplastic starch and polyesters

Beluci, Natália de Camargo Lima; Santos, Juliana dos; Carvalho, Fabíola Azanha de; Yamashita, Fábio

doi:10.1016/j.carpta.2022.100274

Cited by 11 publications

(10 citation statements)

References 57 publications

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“…The films were prepared with starch, PBS, PBAT, CA as a compatibilizing agent, and glycerol as a plasticizer, according to Table 1. The polyesters/TPS ratio and the amount of CA were defined based on the work of Beluci et al 14 …”

Section: Methodsmentioning

confidence: 99%

“…Siracusa et al 11 reported that PBS has a very high selectivity ratio of CO 2 /O 2 , where the transmission rate of CO 2 is 10 times greater than that of O 2 , which could benefit the preservation of food inside the package, extending its shelf life 12 . However, it has a lower biodegradability than its copolymers, 13 additionally to lower ductility and flexibility 14 …”

Section: Introductionmentioning

confidence: 99%

“…For instance, Wei et al 34 and Yap et al 35 developed ternary blends with melted and compression‐molded techniques. Beluci et al 14 developed PBAT, PBS, and TPS films, but the focus was only on studying the mechanical and chemical properties of the material.…”

Section: Introductionmentioning

confidence: 99%

“…The process's economic efficiency and diverse packaging format creation underscore its effectiveness and adaptability in modern industries 36,37 . Additionally, the machinery accommodates the production of starch‐based biodegradable films 14 …”

Section: Introductionmentioning

confidence: 99%

“…12 However, it has a lower biodegradability than its copolymers, 13 additionally to lower ductility and flexibility. 14 In this sense, PBAT is a viable alternative to remedy PBS deficiencies. This material is an aliphatic-aromatic copolyester, commercially synthesized by polycondensation between butanediol, adipic acid, and terephthalic acid.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Tailored biodegradable films via extrusion blow molding using PBS, PBAT, and TPS

de Beluci,

dos Santos,

de Carvalho

et al. 2023

J of Applied Polymer Sci

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Research to replace synthetic polymers with biodegradable polymers is on the rise because common plastics have generated serious ecosystem problems. Films with thermoplastic starch (TPS), poly(butylene succinate) (PBS), poly(butylene adipate‐co‐butylene terephthalate (PBAT), and citric acid (CA) were produced by blown extrusion. They were characterized by blow‐up ratio (BUR), water vapor permeability (WVP), soluble ratio (SR), water sorption isotherm, and thermogravimetric (TG) techniques. Films were uniform and showed BUR > 205%. The different proportions of PBS and PBAT significantly influenced the WVP of the films. All samples had WVP with an order of magnitude similar to other blends with high starch content (10−6 g m−1 day−1 Pa−1). CA efficiently decreased the WVP of the PBS/PBAT/TPS formulations (15/15/70% and 20/10/70% by mass) by 25.2% and 24.7% compared to the acid‐free formulations. There was no significant difference in SR (19.0%–20.1%). These materials were sensitive to moisture since the equilibrium moisture content increased pronouncedly from water activity of 0.5. Films showed good thermal stability, with a maximum decomposition temperature close to pure polyesters. CA did not increase the thermal stability of blends, probably because of the low content used (0.1%). Given the outcomes of this study, these films could be deemed appropriate for applications in food packaging.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Tailored biodegradable films via extrusion blow molding using PBS, PBAT, and TPS

de Beluci,

dos Santos,

de Carvalho

et al. 2023

J of Applied Polymer Sci

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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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Molecular Weight Distribution of Lactic Acid Oligomer from the Polycondensation Without Catalyst and Its Application for the Starch Modification

Triwulandari,

Ghozali,

Restu

et al. 2023

J Polym Environ

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Reactive biodegradable extruded blends of thermoplastic starch and polyesters

Cited by 11 publications

References 57 publications

Tailored biodegradable films via extrusion blow molding using PBS, PBAT, and TPS

Tailored biodegradable films via extrusion blow molding using PBS, PBAT, and TPS

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

Molecular Weight Distribution of Lactic Acid Oligomer from the Polycondensation Without Catalyst and Its Application for the Starch Modification

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