Toughening of Biodegradable Poly(3-hydroxybutyrate-<i>co</i>-3-hydroxyvalerate)/Poly(ε-caprolactone) Blends by In Situ Reactive Compatibilization

Zytner, Peter; Wu, Feng; Misra, Manjusri; Mohanty, Amar K.

doi:10.1021/acsomega.9b04379

Cited by 42 publications

(28 citation statements)

References 61 publications

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“…Figure 7 A,B, both show the decrease in the loss and storage modulus of the PPA with added PA410, probably due to the lower storage/loss modulus of the neat PA410. According to Zytner et al [ 32 ], the tan δ is more sensitive than either loss or storage modulus and can help to understand the viscoelastic properties of polymer blends. Therefore, the ratio of loss modulus/storage modulus, called tan δ, is shown in Figure 7 C. As all blends have a tan δ above 1, all blends show predominantly viscous properties.…”

Section: Resultsmentioning

confidence: 99%

Evaluating the Performance of a Semiaromatic/Aliphatic Polyamide Blend: The Case for Polyphthalamide (PPA) and Polyamide 4,10 (PA410)

Gortari

Mohanty

et al. 2021

Polymers

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This paper studies the structure–property–processing relationship of polyphthalamide (PPA) PPA/polyamide 4,10 (PA410) blends, via co-relating their thermal-mechanical properties with their morphology, crystallization, and viscoelastic properties. When compared to neat PPA, the blends show improved processability with a lower processing temperature (20 °C lower than neat PPA) along with a higher modulus/strength and heat deflection temperature (HDT). The maximum tensile modulus is that of the 25PPA/75PA410 blend, ~3 GPa, 25% higher than neat PPA (~2.4 GPa). 25PPA/75PA410 also exhibits the highest HDT (136 °C) among all the blends, being 11% more than PPA (122 °C). The increase in the thermo-mechanical properties of the blends is explained by the partial miscibility between the two polymers. The blends improve the processing performance of PPA and broaden its applicability.

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Section: Resultsmentioning

confidence: 99%

Evaluating the Performance of a Semiaromatic/Aliphatic Polyamide Blend: The Case for Polyphthalamide (PPA) and Polyamide 4,10 (PA410)

Gortari

Mohanty

et al. 2021

Polymers

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“…This parameter shows more sensitivity toward changes in viscoelastic properties of polymer melts. 47 Generally, loss modulus is interpreted as an indication of energy dissipation, showing viscous behavior of the polymer melt, while storage modulus is an indication of the ability of a material to retain energy during deformation, showing elastic behavior of the polymer melt. As we can see in Figure 2c, for both neat polymers and their blends, tan(δ) values are higher than 1, implying that viscous behavior is the dominant behavior in all samples.…”

Section: Rheological Studiesmentioning

confidence: 99%

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

Pesaranhajiabbas

Pal

Rodriguez‐Uribe

et al. 2022

ACS Appl. Polym. Mater.

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This is the first-ever scientific report on melt blending of two tough home-compostable bioplastics, namely, bio-based poly(butylene succinate-co-adipate) (BioPBSA) and poly(butylene adipate-co-terephthalate) (PBAT). The micrographs from scanning electron microscopy showed that the morphology changed from a droplet-matrix to a co-continuous one as the PBAT concentration was increased in blends. Rheological studies revealed an increase in viscosity and storage modulus of some blends, specifically, the one with 30 wt % of PBAT, as compared to neat biopolymers, as evidence of compatibilization between two bioplastics. The crystallization temperature of PBAT reduced in the presence of BioPBSA, but the presence of a solid PBAT phase did not affect the crystallization of BioPBSA significantly. PBAT showed high capability to enhance the %elongation at break of BioPBSA except in blends with an equal concentration of biopolymers. The appropriate blends having balanced melt elasticity and %elongation show promise for flexible packaging uses as sustainable alternatives to their non-biodegradable plastics such as polyethylene.

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“…In the second case, the incorporation of biowastes or agro-based byproducts such as vegetable fibers as fillers have been widely studied and appears to be an effective strategy to reduce costs while maintaining or even improving the properties of PHAs [17][18][19]. Regarding the limitations in mechanical behavior, reactive blending with elastomeric thermoplastics seems to be an efficient approach to enhance the toughness of brittle polymers by rubber toughening, where the dispersed elastomeric secondary phase acts as an impact modifier, increasing the impact-absorbed energy of the resin [20][21][22]. Reactive blending could also play an important role in improving the thermal stability if the compositions are properly formulated [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

In Service Performance of Toughened PHBV/TPU Blends Obtained by Reactive Extrusion for Injected Parts

et al. 2022

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Moving toward a more sustainable production model based on a circular economy, biopolymers are considered as one of the most promising alternatives to reduce the dependence on oil-based plastics. Polyhydroxybutyrate-co-valerate (PHBV), a bacterial biopolyester from the polyhydroxialkanoates (PHAs) family, seems to be an attractive candidate to replace commodities in many applications such as rigid packaging, among others, due to its excellent overall physicochemical and mechanical properties. However, it presents a relatively poor thermal stability, low toughness and ductility, thus limiting its applicability with respect to other polymers such as polypropylene (PP). To improve the performance of PHBV, reactive blending with an elastomer seems to be a proper cost-effective strategy that would lead to increased ductility and toughness by rubber toughening mechanisms. Hence, the objective of this work was the development and characterization of toughness-improved blends of PHBV with thermoplastic polyurethane (TPU) using hexamethylene diisocyanate (HMDI) as a reactive extrusion agent. To better understand the role of the elastomer and the compatibilizer, the morphological, rheological, thermal, and mechanical behavior of the blends were investigated. To explore the in-service performance of the blends, mechanical and long-term creep characterization were conducted at three different temperatures (−20, 23, 50 °C). Furthermore, the biodegradability in composting conditions has also been tested. The results showed that HMDI proved its efficiency as a compatibilizer in this system, reducing the average particle size of the TPU disperse phase and enhancing the adhesion between the PHBV matrix and TPU elastomer. Although the sole incorporation of the TPU leads to slight improvements in toughness, the compatibilizer plays a key role in improving the overall performance of the blends, leading to a clear improvement in toughness and long-term behavior.

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Toughening of Biodegradable Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/Poly(ε-caprolactone) Blends by In Situ Reactive Compatibilization

Cited by 42 publications

References 61 publications

Evaluating the Performance of a Semiaromatic/Aliphatic Polyamide Blend: The Case for Polyphthalamide (PPA) and Polyamide 4,10 (PA410)

Evaluating the Performance of a Semiaromatic/Aliphatic Polyamide Blend: The Case for Polyphthalamide (PPA) and Polyamide 4,10 (PA410)

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

In Service Performance of Toughened PHBV/TPU Blends Obtained by Reactive Extrusion for Injected Parts

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