Super-toughened poly(lactic acid)/thermoplastic poly(ether)urethane nanofiber composites with in-situ formation of aligned nanofibers prepared by an innovative eccentric rotor extruder

He, Yue; Yang, Zhitao; Qu, Jinping

doi:10.1016/j.compscitech.2018.11.002

Cited by 66 publications

(47 citation statements)

References 37 publications

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“…It is known that the morphology, including particle size and distribution of the dispersed phase in the matrix, play an important role in the mechanical properties of polymers. In order to more deeply investigate the relationship between toughness mechanism and microstructure evolution of PLA/PBS/EGMA ternary blends, the cryo-fractured surfaces were etched by a sodium hydroxide–methanol−water solution in order to eliminate the PLA amorphous in the blends from being implemented [30]. The SEM images of cryofracture surfaces and PLA amorphous etched cryofracture surfaces of the PLA/PBS blend and the PLA/PBS/EGMA blends with different weight fraction EGMA are shown in Figure 5.…”

Section: Resultsmentioning

confidence: 99%

A Facile Fabrication of High Toughness Poly(lactic Acid) via Reactive Extrusion with Poly(butylene Succinate) and Ethylene-Methyl Acrylate-Glycidyl Methacrylate

Xue

Zhu

et al. 2018

Polymers

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As is an excellent bio-based polymer material, poly(lactic acid) (PLA)’s brittle nature greatly restricts its extensive applications. Herein, poly(butylene succinate) (PBS) was introduced to toughening PLA by melt blending using a self-made triple screw extruder through in situ reactive with ethylene-methyl acrylate-glycidyl methacrylate (EGMA). The effect of EGMA concentrations on the mechanical properties, morphology, interfacial compatibility of PLA/PBS blends were studied. Fourier transform infrared (FT-IR) results demonstrated that the epoxy group of EGMA reacts with the hydroxyl groups of PLA and PBS, which proved the occurrence of interfacial reactions among the tri-component. The significantly improved compatibility between PLA and PBS after EGMA incorporation was made evident by scanning electron microscope (SEM) characterization results. Meanwhile, the contact angle test predicted that the EGMA was selectively localized at the interface between PLA and PBS, and the result was verified by morphological analysis of cryofracture and etched samples. The EGMA improves the compatibility of PLA/PBS blends, and consequently leads to a significantly increased toughness with the elongation at break occurring 83 times more when 10 wt % EGMA was introduced than neat PLA, while impact strength also enhanced by twentyfold. Ultimately, the toughening mechanism of PLA based polymers was established based on the above analysis, exploring a new way for the extensive application for degradable material.

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Section: Resultsmentioning

confidence: 99%

A Facile Fabrication of High Toughness Poly(lactic Acid) via Reactive Extrusion with Poly(butylene Succinate) and Ethylene-Methyl Acrylate-Glycidyl Methacrylate

Xue

Zhu

et al. 2018

Polymers

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“…The material transport between the stator and the eccentric rotor in the eccentric rotor extruder depends on the pulsed volume deformation during periodic compression and release based on elongation flow field, rather than the friction between the materials and the parts based on shear flow field. Compared with shear and elongation flow filed, when the elongation rate is equal to the shear rate, the dispersing and blending efficiency in the elongation flow field is significantly higher than that in the shear flow field 34 . With good dispersing and blending efficiency, the immiscible polymers can get a smaller size distribution, which is helpful to improve the miscibility of the polymer blends.…”

Section: Introductionmentioning

confidence: 99%

“…The eccentric rotor extruder is a new kind of extruder based on the elongation flow, was invented by Qu Jin‐Ping 33 . Compared with traditional screw extruders, the eccentric rotor extruder has a short thermal process and contributes to better mechanical properties of immiscible polymers due to elongation flow 33‐35 . The eccentric rotor extruder is a novel nonscrew extruder that contains a stator and an eccentric rotor disposed in the inner cavity of the stator.…”

Section: Introductionmentioning

confidence: 99%

Morphology, thermal behavior, rheological, and mechanical properties of polypropylene/polystyrene blends based on elongation flow

Chen

Liu

Lin

et al. 2020

Polymers for Advanced Techs

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Binary blends comprised of polypropylene (PP) and polystyrene (PS) were prepared by a novel eccentric rotor extruder based on elongation flow. The morphology, thermal behavior, rheological and mechanical properties were investigated. As the enhanced mixed dispersion based on the novel extruder, the dispersed PS phase were uniformly dispersed in the PP matrix when the PS not more than 40%, and a distinct cocontinuous phase structure emerged when the PS content was 50%. The size of the dispersed PS phase related to the PS content and the processing flow filed influenced the crystallization behavior and the thermal stability of the blends. The PS droplet with small size could act as a nucleating agent for PP to improve the crystallinity, and PS droplet with large size could promote the thermal and heat transfer between the PS droplets and PP matrix which decreased the thermal stability. The rheological results showed that the compounding with PS into the PP matrix increased the storage and loss modulus as well as the complex viscosity of the materials. When the PS content not more than 20%, the blends showed good impact resistance, and PP/PS blends 30% PS showed good tensile and flexural properties. This study gives a new perspective for the structure and properties of the binary PP/PS blends prepared based on elongation flow.

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“…Owing to the restriction of the surface, it is more difficult for the smaller particles to form ordered structures, resulting in a slow rate of crystallization and a long crystallization time. Secondly, the interdiffusion of immiscible polymers into each other at the interface can be enhanced by the elongational flow field, according to the literature [25]. Because of this, the chain entanglement of the two immiscible polymers is more serious at the interface, leading not only to the strengthening of the interface, but also to more difficulty in forming an ordered structure, i.e., crystallization, for the dispersed PET phase.…”

Section: Differential Scanning Calorimetry (Dsc) Testmentioning

confidence: 97%

“…Polymers 2020, 12, 585 12 of 17 according to the literature [25]. Because of this, the chain entanglement of the two immiscible polymers is more serious at the interface, leading not only to the strengthening of the interface, but also to more difficulty in forming an ordered structure, i.e., crystallization, for the dispersed PET phase.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Improved Properties of Metallocene Polyethylene/Poly(ethylene terephthalate) Blends Processed by an Innovative Eccentric Rotor Extruder

Xue

et al. 2020

Polymers

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In this investigation, metallocene polyethylene (m-PE) was melt blended with poly(ethylene terephthalate) (PET) with an effort to achieve improved mechanical properties using a novel eccentric rotor extruder (ERE) without the addition of any compatibilizers. The phase morphology, rheological properties, crystallization behavior, and mechanical properties of the fabricated blends were carefully studied to explore the effect of the elongational flow field on the dispersion and mixing of PET in the m-PE matrix and the interface of the two immiscible polymers. For comparison, a conventional twin-screw extruder (TSE) was used to prepare the same blends as references using the same processing condition. It shows that the elongational flow field in ERE is much more effective to disperse the immiscible PET in the m-PE matrix with a smaller particle size and a narrower particle size distribution, compared to the shear flow field in TSE. A compatibilizer, ethylene-co-methyl acrylate-co-glycidyl methacrylate (E-MA-GMA), was added to the m-PE/PET blends during the processing using TSE and ERE. It was observed that the improvement of the tensile property by adding the compatibilizer is marginal for the m-PE/PET blends processed using ERE, which indirectly proves the high effectiveness of the elongational flow field on the enhancement of the dispersion and mixing of PET in the m-PE matrix and the interface interaction.

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Super-toughened poly(lactic acid)/thermoplastic poly(ether)urethane nanofiber composites with in-situ formation of aligned nanofibers prepared by an innovative eccentric rotor extruder

Cited by 66 publications

References 37 publications

A Facile Fabrication of High Toughness Poly(lactic Acid) via Reactive Extrusion with Poly(butylene Succinate) and Ethylene-Methyl Acrylate-Glycidyl Methacrylate

A Facile Fabrication of High Toughness Poly(lactic Acid) via Reactive Extrusion with Poly(butylene Succinate) and Ethylene-Methyl Acrylate-Glycidyl Methacrylate

Morphology, thermal behavior, rheological, and mechanical properties of polypropylene/polystyrene blends based on elongation flow

Improved Properties of Metallocene Polyethylene/Poly(ethylene terephthalate) Blends Processed by an Innovative Eccentric Rotor Extruder

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