Biodegradable Polymer Blends: Studies on Performance Control through Droplet to Co-continuous Morphology

Pesaranhajiabbas, Ehsan; Pal, Akhilesh Kumar; Rodriguez‐Uribe, Arturo; Mohanty, Amar K.; Misra, Manjusri

doi:10.1021/acsapm.2c00603

Cited by 14 publications

(8 citation statements)

References 52 publications

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“…The first drop represents the degradation of PHBV with a degradation onset temperature of $273 C, and the second drop is the degradation of PBAT with an expected degradation temperature of $350 C. This is consistent with the thermal degradation behaviour noted in other studies utilizing these polymers, both within a blend and as neat polymers. [7,20,52] The 60/40 blend with no additives has the lowest degradation onset temperature for PHBV yet has the highest degradation onset temperature for PBAT compared to the other blends. As seen in the previous study by Zytner et al, there is a residual amount of PBAT left after the majority of degradation occurs.…”

Section: Dynamic Mechanical Analysis (Dma)mentioning

confidence: 99%

Performance evaluation of biodegradable polymer PHBV and PBAT blends with adjustable melt flow behaviour, heat deflection temperature, and morphological transition

Zytner,

Pal,

Mohanty

et al. 2024

Can J Chem Eng

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Melt blending is a reliable and well‐demonstrated strategy for improving the mechanical, thermal, rheological, and surface properties of biopolymers. Poly(hydroxy‐3‐butyrate‐co‐3‐hydroxyvalerate) (PHBV) and poly(butylene adipate‐co‐terephthalate) (PBAT) are the two popular choices for blending polymers due to their diverse properties and complementary soil biodegradable behaviour. Due to their immiscibility, however, blending with the help of processing additives is necessary to reap the most significant benefits from this process and to avoid immiscibility issues. This study utilized the additives (peroxides and epoxy‐based chain extender) to compatibilize the biodegradable polymers PHBV and PBAT in a 60:40 blending ratio. The tensile strength and Young's modulus of the PHBV/PBAT(60/40) blend were improved by 32% and 64%, respectively, after adding a combination of peroxide (0.02 phr) and chain extender (0.3 phr) due to the formation of a complex network structure with increased chain length. The positive effect of an additive addition was also reflected by a 30°C increment in heat deflection temperature of biodegradable blend due to its high modulus value as supported by mechanical properties. The combined action of a peroxide and chain extender demonstrated a significantly higher complex viscosity of the PHBV/PBAT(60/40) blend due to the formation of a crosslinked polymer network as analyzed by rheological analysis. Our research demonstrated the effect of additives and their combined impact on analytical properties of PHBV/PBAT(60/40) blend to guide future work in improving their candidature to serve as a drop‐in solution in replacing non‐biodegradable petro‐based plastic products.

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Section: Dynamic Mechanical Analysis (Dma)mentioning

confidence: 99%

Performance evaluation of biodegradable polymer PHBV and PBAT blends with adjustable melt flow behaviour, heat deflection temperature, and morphological transition

Zytner,

Pal,

Mohanty

et al. 2024

Can J Chem Eng

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Section: Introductionmentioning

confidence: 99%

“…Most widely used commercial bioplastics for packaging applications include thermoplastic starch, polyhydroxyalkanoates, poly(lactic acid) (PLA), poly(butylene succinate-co-adipate) (PBSA), and poly(butylene succinate) (PBS) which can be used depending on their specific requirement. [2] PBSA is a biodegradable aliphatic polyester that is prepared commercially using polycondensation of dicarboxylic acid (succinic acid and adipic acid) and 1,4-butanediol. [3] It has high impact strength, high flexibility, and high thermal and chemical resistance properties.…”

Section: Introductionmentioning

confidence: 99%

“…[4] In contrast to PBS, PBSA demonstrates a higher rate of biodegradation in different environments due to the increased flexibility of polymer chains and reduced crystallinity. [2,3] In numerous studies, it has been demonstrated that PBSA degraded within months in seawater, soil, and soil with activated sludge. [5,6] Due to its biodegradability and material properties, PBSA is widely used in flexible packaging.…”

Section: Introductionmentioning

confidence: 99%

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Biodegradable Blown Film Composites from Bioplastic and Talc: Effect of Uniaxial Stretching on Mechanical and Barrier Properties

Nath,

Pal,

Misra

et al. 2023

Macro Materials & Eng

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As public awareness about climate change grows, there is an increase in the research on bioplastic packaging films. This is the first‐ever scientific report on uniaxially stretched biobased‐polybutylene succinate‐co‐adipate (BioPBSA) and talc (15 and 25 wt%) based blown film composites at different stretch ratios (SR). The water vapor barrier properties of BioPBSA+25%Talc film at SR 4 shows an improvement of 40% compared to its unstretched counterpart, while an overall improvement of 48% is observed compared to the unstretched BioPBSA film. The successful dispersion of talc in the BioPBSA matrix, the orientation of talc filler during stretching, and the polymer chains orientation are responsible for such improvement. Additionally, XRD analysis shows that during uniaxial stretching, the crystallinity of the films increases by up to 26% as a result of strain‐induced crystallization, with BioPBSA+25%Talc at SR 4 having the highest crystallinity (≈75%). Furthermore, the inclusion of 25% talc in BioPBSA considerably enhances the tensile modulus by 246% compared to its unstretched counterpart. Hence biodegradable films with balanced barrier and tensile properties may be promising alternatives to petroleum‐based plastic materials used in flexible packaging applications.

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“…To the various biodegradable polymeric materials mentioned above, polymer blends of the appropriate components should be added [ 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Photochemical and Thermal Stability of Bionanocellulose/Poly(Vinyl Alcohol) Blends

2022

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This research focuses on novel ecological materials for biomedical and cosmetic applications. The cellulose of bacterial origin is well suited for such purposes, but its functional properties must be modified. In this work, the blends of bionanocellulose and poly(vinyl alcohol), BNC/PVA, were prepared based on in situ and ex situ methodology combined with impregnation and sterilization, using different concentrations of PVA. The main purpose of this work was to check the influence of UV radiation and high temperature, which can be sterilizing factors, on the properties of these mixtures. It was found that the crystallinity degree increases in UV-irradiated samples due to the photodegradation of the amorphous phase. This changes the mechanical properties: the breaking stress and Young’s modulus decreased, while the strain at break increased in most UV-irradiated samples. The surface morphology, which we observed by using AFM, did not change significantly after exposure, but the roughness and surface free energy changed irregularly in samples obtained by different methods. However, the effects induced by UV-irradiation were not so crucial as to deteriorate the materials’ properties designed for medical applications. Thermogravimetric analysis exhibited good thermal stability for all samples up to at least 200 °C, which allows for the prediction of these systems also in industrial sectors.

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Biodegradable Polymer Blends: Studies on Performance Control through Droplet to Co-continuous Morphology

Cited by 14 publications

References 52 publications

Performance evaluation of biodegradable polymer PHBV and PBAT blends with adjustable melt flow behaviour, heat deflection temperature, and morphological transition

Performance evaluation of biodegradable polymer PHBV and PBAT blends with adjustable melt flow behaviour, heat deflection temperature, and morphological transition

Biodegradable Blown Film Composites from Bioplastic and Talc: Effect of Uniaxial Stretching on Mechanical and Barrier Properties

Photochemical and Thermal Stability of Bionanocellulose/Poly(Vinyl Alcohol) Blends

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