Mechanical and bead foaming behavior of PLA-PBAT and PLA-PBSA blends with different morphologies

Nofar, Mohammadreza; Tabatabaei, Alireza; Sojoudiasli, Helia; Park, Chul; Carreau, Pierre J.; Heuzey, M. C.; Kamal, Musa R.

doi:10.1016/j.eurpolymj.2017.03.031

Cited by 159 publications

(103 citation statements)

References 67 publications

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“…It could be found that the G′ curves of CE‐PBAT samples were higher than that of torqued PBAT sample and the slope of the G′ curves decreased at the low‐frequency region after the chain extension owing to the increasing molecular weight and a longer relaxing process. Meanwhile, the G′ values of CE‐PBAT samples increased slightly with the increasing content CE, indicating that the melt strength of CE‐PBAT samples had been improved by the chain extension and/or crosslinking reaction . Thus, it could be expected that the foamability of CE‐PBAT samples would be improved in the foaming process, owing to the enhancement of the melt elasticity of the CE‐PBAT samples.…”

Section: Resultsmentioning

confidence: 97%

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Role of chain extension in the rheological properties, crystallization behaviors, and microcellular foaming performances of poly (butylene adipate‐co‐terephthalate)

Jia

Zhou

Wang

et al. 2018

J of Applied Polymer Sci

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Currently, the fabrication of microcellular semicrystalline polymer foam using supercritical CO2 as a blowing agent constitutes a worldwide interest. In this work, a facile approach of chain extension and batch foaming was proposed to prepare microcellular semicrystalline poly (butylene adipate‐co‐terephthalate) (PBAT) foam using CO2 as a physical blowing agent. With the introduction of chain extender (CE), the weight‐average molecular weight and gel fraction of PBAT samples increased; their crystallization temperature increased from 74.2 to 86.9 °C and their viscoelasticity was improved greatly. Microcellular PBAT foams with the cell size <4 μm and the cell density more than 1010 cells cm−3 were fabricated successfully. With increasing concentration of CE, the cell density and volume expansion ratio (VER) of various PBAT foams increased from 3.4 × 1010 to 8.7 × 1010 cells cm−3 and from 1.5 to 2.0 times, respectively. With increasing foaming temperature, the cell size and VER increased and the cell density decreased. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47322.

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Section: Resultsmentioning

confidence: 97%

“…A trend that the tanδ values of torqued PBAT and CE‐PBAT samples became smaller with increasing CE content was observed. It could be explained that the relaxing time of torqued PBAT and CE‐PBAT samples became longer with the increment of CE . When the CE content reached 0.6 phr, the tanδ curve of CE‐PABT0.6 was the lowest, near 1.…”

Section: Resultsmentioning

confidence: 99%

Role of chain extension in the rheological properties, crystallization behaviors, and microcellular foaming performances of poly (butylene adipate‐co‐terephthalate)

Jia

Zhou

Wang

et al. 2018

J of Applied Polymer Sci

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“…Due to its continuous manufacturing process and excellent properties of final product, the development of bead foam has been continually attracting attention. Especially, expanded poly(lactic acid) (EPLA) has become a hot spot in both research and industry . Since EPLA is made from renewable sources and can be biodegraded in the environment, it is considered as a potential substitute for widely used expanded polystyrene.…”

Section: Introductionmentioning

confidence: 99%

Effect of stereocomplex crystal on foaming behavior and sintering of poly(lactic acid) bead foams

Liu

Yang

2018

Polymer International

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Poly(lactic acid) (PLA) bead foams with stereocomplex (Sc)/α crystals were prepared by melt mixing and solid‐state foaming methods, independently. A systematic method was applied to evaluate the effect of Sc/α crystals on rheological properties and foaming behavior of PLA. The results indicated that the presence of Sc/α crystals affected the foaming behavior and the melt elasticity of PLA. Hence, the enhanced rheological properties of PLA had a significant effect on controlling the foaming behavior. As a result, PLA bead foam with an expansion ratio of 24‐fold was developed. And, the presence of Sc/α crystals could also facilitate the sintering behavior and broaden the sintering process window. Sintered PLA bead foam with finer cellular morphology and strong sintering effect was obtained by inducing an appropriate Sc/α crystalline structure. © 2018 Society of Chemical Industry

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“…Therefore, PHB can be applied as a suitable material in food packaging and wound dressings, controlled drug delivery, and tissue engineering scaffolds . However, PHB and other polymers from polyhydroxyalkanoates family have poor mechanical and thermal properties, for example, low elongation and a narrow window of processability, which restricts their application, while poly(butyleneadipate‐ co ‐terephthalate) (PBAT) is an aliphatic and aromatic copolymer, which has excellent biodegradable properties from aliphatic polyesters and good mechanical properties from aromatic polyesters . So an alternative is the use of PBAT to act as reinforcements, to improve the PHB properties.…”

Section: Introductionmentioning

confidence: 99%

“…aromatic copolymer, which has excellent biodegradable properties from aliphatic polyesters and good mechanical properties from aromatic polyesters. 7,8 So an alternative is the use of PBAT to act as reinforcements, to improve the PHB properties.…”

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confidence: 99%

Preparation and characterization of PHB/PBAT–based biodegradable antibacterial hydrophobic nanofibrous membranes

Lin

Fan

et al. 2017

Polymers for Advanced Techs

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In this study, polyhydroxybutyrate/poly(butyleneadipate-co-terephthalate) (PHB/PBAT) nanofibrous membranes were produced by electrospinning the blends of biodegradable PHB and PBAT. The antibacterial hydrophobic nanofiber membranes were obtained by grafting 1-allylhydantoin and perfluorooctyl acrylate onto the PHB/PBAT membranes. The prepared nanofibrous membranes were chlorinated with chlorine bleach and characterized by scanning electron microscopy, Fourier transform infrared, and thermogravimetric analysis. The chlorinated nanofibrous membranes exhibited efficient antimicrobial activity against Escherichia coli O157:H7 (ATCC 43895) and Staphylococcus aureus (ATCC 6538) with 6.08 and 5.78 log reduction, respectively. The contact angle of this antibacterial membrane was 123.1°± 1.9°. The treated membranes showed good stability and durability towards UV-A light exposure and storage. To effectively block the entry of water and moisture and slow down food spoilage, food packaging materials need to be hydrophobic.Hydrophobic agents including wax, aluminum soap, zirconium soap, | ElectrospinningEight percent (wt) of PHB and PBAT (PHB/PBAT, 1:1, w/w) were dissolved in a mixture of CHCl 3 and DMF (CHCl 3 /DMF, 10:1, w/w).Electrospinning was performed at 20 kV with a flow rate of 1.5 mL·h −1 at ambient temperature. The distance from tip to collector was 15 cm. The electrospun fibrous membranes were collected on a rotating drum covered with an aluminum foil at a speed of 50 rpm. | Grafting AH and PFAThe mechanism scheme of AH and PFA grafting on PHB/PBAT surfaces is shown in Scheme 1. Initially, AH (1, 2, 3, 4, 5, 7, and 9 wt%) and AIBN (10 wt% of AH) were dissolved in ethanol solution in an ultrasonic bath for 20 minutes. Ethanol solution was at a bath ratio of 50:1 on the weight of fibrous membranes. Then, a certain amount of PHB/PBAT fibrous membranes was immersed in the above solution in a water bath at 75°C for 3 hours. Subsequently, fibrous membrane was extracted in ethanol for 24 hours using a Soxhlet extractor.Perfluorooctyl acrylate (3, 5, 7, 9, 11, and 13 wt%), AIBN (10 wt% of PFA), and OP-10 (2 wt% of PFA) were dissolved in ethanol solution by ultrasonic vibration for 20 minutes at room temperature. The PHB/PBAT fibrous membranes were added into the solution in a water bath at 75°C for 3 hours. Subsequently, fibrous membrane was extracted in ethanol for 24 hours using a Soxhlet extractor. | Chlorination and titrationThe PHB/PBAT-AH/PFA fibrous membranes were immersed in a 0.05% of NaOCl solution, pH 7, at ambient temperature for 1 hour to become an antimicrobial material. Then, the chlorinated fibrous membranes were washed thoroughly with deionized water and dried at 45°C for 1 hour to remove the unbound chlorine. The loaded active chlorine content on the membranes was measured by the modified iodometric/thiosulfate titration method. The chlorine weight percent of the membranes was calculated according to the equation below:where Cl + (%) is the weight percent of active chlorine on the sample; N and V are...

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Mechanical and bead foaming behavior of PLA-PBAT and PLA-PBSA blends with different morphologies

Cited by 159 publications

References 67 publications

Role of chain extension in the rheological properties, crystallization behaviors, and microcellular foaming performances of poly (butylene adipate‐co‐terephthalate)

Role of chain extension in the rheological properties, crystallization behaviors, and microcellular foaming performances of poly (butylene adipate‐co‐terephthalate)

Effect of stereocomplex crystal on foaming behavior and sintering of poly(lactic acid) bead foams

Preparation and characterization of PHB/PBAT–based biodegradable antibacterial hydrophobic nanofibrous membranes

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