Novel bioresource‐based poly(3‐Hydroxybutyrate‐co‐4‐Hydroxybutyrate)/poly(LacticAcid) blend fibers with high strength and toughness via melt‐spinning

Chen, Ziyang; Zhao, Zuoxian; Hong, Jing; Pan, Zhijuan

doi:10.1002/app.48956

Cited by 22 publications

(23 citation statements)

References 35 publications

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“…Neat P(3HB)(4HB) film sample features only Tg and unclear melting point, indicating that the P(3HB)(4HB) film samples were indeed in amorphous state as observed in other studies 11,17,28 …”

Section: Resultssupporting

confidence: 65%

“…The XRD scans of P(3HB)(4HB)/PLA cast films are presented in Figure 10. The diffraction peaks registered in the XRD analysis of CL blends are the following; 13.8°, 16.9°, 27.5°, and 29.1° associated with planes (020) for P(3HB)(4HB), (110) for PLA and P(3HB)(4HB), (040) and (002) for P(3HB)(4HB), respectively 28,42,43 . The results show that CL 10 exhibited only a slightly hinted peak located at 17° associated to (110) planes of PLA 43 .…”

Section: Resultsmentioning

confidence: 91%

“…Therefore, it appears P(3HB)(4HB) indeed promotes crystallization of PLA, as previously discussed in the DSC results section. The peak at 13.6°, related to (020) lattice plane that is a characteristic peak for P(3HB)(4HB), 28 appears with inclusion of 20% and higher content of P(3HB)(4HB). The relative intensity of this diffraction peak increases with the increase in the percentage of P(3HB)(4HB) in accordance with the study by Li et al 42 However, it is also visible that the broader peak centred at 16° for CL10, shifted towards higher degrees for CL30 and CL40 sample.…”

Section: Resultsmentioning

confidence: 99%

“…The crystallinity degree of PLA was calculated by using the following formula:

χ (%) = \frac{∆ H m}{{Δ H}_{normalm}^{0} \times φ_{PLA}} .

where Δ H m (J/g) is the measured melting enthalpy for PLA and

{Δ H}_{normalm}^{0}

= 93.7 J/g is the melting enthalpy of 100% crystalline PLA 28 …”

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Processing PLA/P(3HB)(4HB) blends for the manufacture of highly transparent, gas barrier and fully bio‐based films for compostable packaging applications

Aversa

Barletta

Koca

2023

J of Applied Polymer Sci

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In this study, the extrusion process of PLA/P(3HB)(4HB) blends was studied and the effect on mechanical, thermal and physical properties of the blends containing increasing amounts of P(3HB)(4HB) was evaluated. The blends were prepared by means of a twin screw extruder and subsequently film samples were manufactured using a lab scale cast extruder. A potential industrial application of the studied materials was also validated by testing the films on a pilot thermoforming machine for the production of food containers. The extrusion process demonstrated good processability of blends containing 10%, 20%, and 30% of P(3HB)(4HB). Increasing the amount of P(3HB)(4HB) up to 40% and 50%, processability problems occurred related to tackiness of the materials both during extrusion compounding and during cast extrusion. Both granules and films were characterized and thermo-physical and mechanical properties of the samples are hereinafter reported. The novel polymeric blends are found to be suitable for extrusion compounding, cast extrusion and thermoforming processes. Moreover, the blends exhibit enhanced performances in terms of flexibility and impact resistance as well as protection against gas permeation and boast exceptional transparency. Therefore, the innovative PLA/P(3HB) (4HB) blends prove to be suitable for the production of compostable single-use packaging requiring high transparency and gas barrier.

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“…Neat P(3HB)(4HB) film sample features only Tg and unclear melting point, indicating that the P(3HB)(4HB) film samples were indeed in amorphous state as observed in other studies 11,17,28 …”

Section: Resultssupporting

confidence: 65%

Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 99%

“…The crystallinity degree of PLA was calculated by using the following formula:

χ (%) = \frac{∆ H m}{{Δ H}_{normalm}^{0} \times φ_{PLA}} .

where Δ H m (J/g) is the measured melting enthalpy for PLA and

{Δ H}_{normalm}^{0}

= 93.7 J/g is the melting enthalpy of 100% crystalline PLA 28 …”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Processing PLA/P(3HB)(4HB) blends for the manufacture of highly transparent, gas barrier and fully bio‐based films for compostable packaging applications

Aversa

Barletta

Koca

2023

J of Applied Polymer Sci

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“…29 To further tailor and improve the crystallinity of PLLA, it is necessary to obtain an in-depth understanding on the true mechanism of nucleation and growth of PLLA in the PLLA/PHAs blends. It has been frequently reported that the PHAs phases in the PLLA/PHAs blends served as nucleating agents to accelerate the overall crystallization of PLLA, such as PHB, 30,31 P34HB, 32 and PHBV. [33][34][35] Besides, the PHAs phases including PHB and P34HB were found to act as spherulite growth-accelerating or plasticizing agents, enhancing the crystallization of PLLA.…”

mentioning

confidence: 99%

Polylactide/poly[(R)‐3‐hydroxybutyrate] (PHB) blend fibers with superior heat‐resistance: Effect ofPHBon crystallization

Huang

Shi

Wang³

et al. 2023

Polymers for Advanced Techs

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Blending low content of poly[(R)‐3‐hydroxybutyrate‐co‐4‐hydroxybutyrate] (P34HB ≤8 wt %) with poly(L‐lactide) (PLLA) has proven effective in enhancing heat resistance of PLLA fibers. Unfortunately, the enhancement is relatively limited with boiling water shrinkage of PLLA/P34HB blend fibers reduced to 9.9% at most. In this study, a series of PLLA/poly[(R)‐3‐hydroxybutyrate] (PHB) blend fibers with low PHB content (≤8 wt %) was prepared with sound spinnability. Surprisingly, the PLLA/PHB blend fibers showed much lower boiling water shrinkage than the PLLA/P34HB blend fibers with the same blend ratio. In particular, the boiling water shrinkage was dropped from ca. 80% for neat PLLA fibers to 9.9% for the PLA/P34HB blend fibers and further to 3.8% for the PLA/PHB blend fibers with 8 wt % P34HB or PHB added. Such an exceptionally improved heat resistance of the PLLA/PHB blend fibers could be closely related to an increase in crystallinity (Xc,PLLA) of the PLLA phase. Specifically, the mobility of the PLLA segments was promoted in the presence of PHB, along with notably improved orientation of the PLLA phase in the PLLA/PHB blend fibers. More importantly, investigation on crystallization behaviors revealed that the PHB phase served as an effective nucleating agent to accelerate the overall crystallization of PLLA. By contrast, the P34HB phase only acted as spherulite growth‐accelerating and/or nucleation‐assisting agents. These findings help provide a facile and effective strategy to improve heat resistance of PLLA fibers more significantly.

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Blown film extrusion of poly(lactic)acid/poly(3‐hydroxybutyrate‐4‐hydroxybutyrate) blends for improved toughness and processability

Koca

Aversa

Barletta

2023

Polymer Engineering & Sci

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Poly(lactic acid) is one of the most commonly used bioplastics thanks to its mechanical performance and low environmental impact. Strategies to overcome excessive rigidity of PLA are constantly investigated. Poor viscoelastic behavior and brittleness of PLA seriously limit its potential application as a common film material. Herein highly amorphous Poly(3‐hydroxybutyrate‐4‐hydroxybutyrate) (P(3HB)(4HB)) was introduced to improve toughness and reduce brittleness of PLA. Anti‐blocking (silica) and anti‐slipping agent (Ethylene bis‐stearamide (EBS)) were added to improve the processability of the blends, specifically to solve winding issues of the blown film and unfolding of the layflat. In this study three formulations containing PLA and different ratios of P(3HB)(4HB), specifically 10–20–30% were extruded. The mechanical, thermal and surface characterization of the films was performed. The tensile and the tear strength test results show that P(3HB)(4HB) increased the ductility of PLA based films. Increasing amounts of P(3HB)(4HB) provide a toughening effect on PLA/P(3HB)(4HB) blown films without altering transparency of PLA. Moreover, the processing additives proved to be efficient in improving film blowing stability and avoiding tackiness during the winding phase of the film.

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Novel bioresource‐based poly(3‐Hydroxybutyrate‐co‐4‐Hydroxybutyrate)/poly(LacticAcid) blend fibers with high strength and toughness via melt‐spinning

Cited by 22 publications

References 35 publications

Processing PLA/P(3HB)(4HB) blends for the manufacture of highly transparent, gas barrier and fully bio‐based films for compostable packaging applications

Processing PLA/P(3HB)(4HB) blends for the manufacture of highly transparent, gas barrier and fully bio‐based films for compostable packaging applications

Polylactide/poly[(R)‐3‐hydroxybutyrate] (PHB) blend fibers with superior heat‐resistance: Effect ofPHBon crystallization

Blown film extrusion of poly(lactic)acid/poly(3‐hydroxybutyrate‐4‐hydroxybutyrate) blends for improved toughness and processability

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