Preparation and Characterization of Super-Toughened PLA/CPU Blends via One-step Dynamic Vulcanization

Sheng, Mengjie; Wu, Li-Da; Li, Xiaolong; Yan, Han; Xiang, Lu; Xu, Yang; Li, Yi; Tong, Yi; Qu, Jinping

doi:10.30919/es8d591

Cited by 17 publications

(12 citation statements)

References 41 publications

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“…Toughness is a physical quantity that evaluates the ability of a material to absorb energy during plastic deformation and fracture. , In the organic sector, for example, graphene oxide (GO) has inherent toughness and stiffness, and researchers have achieved superb mechanical toughness by surface treating GO or by electrostatically self-assembling core–shell hybrid particles with other nanoparticles as fillers. , It is a combination of material strength and plasticity. The characters after fracture are obvious macroscopic plastic deformation and jagged-shaped breakage.…”

Section: Mechanical Performancesmentioning

confidence: 99%

Bioinspired Nanoheterogeneous Alternating Multiarched Architecture: Toward a Superior Strength–Toughness Integration

Dong

Zhu

Chang

et al. 2022

ACS Appl. Mater. Interfaces

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Strength and toughness are at odds with each other in coating design. Constructing strength–toughness-integrated coatings has long been a pursuit in materials design but is a challenge to achieve. Conventional wisdom suggests that growth of coatings is only a uniform cumulative growth on a two-dimensional plane. However, by constructing growth templates and controlling the alternation of heterogeneous materials, it subverts the traditional perception of cumulative growth in planes and creates the fact that the coating grows on a curved surface. Regulating the microstructure of the coating autonomously and matching the strength and toughness of heterogeneous materials, drawing inspiration from the multiarched structure in the nacre of red abalone, are crucial for achieving strength–toughness integration. Herein, we propose a new idea of coating deposition to achieve strength–toughness integration via preconstructing a nanoscale island-like discontinuous seed layer as a template for coating growth and then growing a nanoscale hard/soft heterogeneous multiarched architecture in situ. We refer to this architecture with intrinsic mechanical advantage as the “Nanoheterogeneous Alternating Multiarched” (NHAM) architecture. We design a nacre-like multiarched coating with a strength of 12.42 GPa and a K IC value of 2.12 MPa·m1/2, depositing the hard phase (TiSiCN layer) and the soft phase (Ag layer) with the unique NHAM architecture via physical vapor deposition technology, which exhibits a superior improvement in the strength–toughness integration compared to that reported in other studies (increased strength by at least 1 GPa without sacrificing toughness). The NHAM architecture strategy provides a pathway to design strength–toughness-integrated coatings. Two heterogeneous materials with well-matched strength and toughness can be deposited to achieve the NHAM architecture to greatly reflect the effect of strength–toughness integration.

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Section: Mechanical Performancesmentioning

confidence: 99%

Bioinspired Nanoheterogeneous Alternating Multiarched Architecture: Toward a Superior Strength–Toughness Integration

Dong

Zhu

Chang

et al. 2022

ACS Appl. Mater. Interfaces

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“…Polymer blending is an efficient and cost-effective process to prepare polymeric materials with desired mechanical properties, as well as ease of processability and printability. − The development of FDM filament feedstocks from new polymer blends for FDM has been of great interest, as they often offer enhanced material performances and particularly unique functionalities when compared to their corresponding homopolymers. For instance, the study of Geng et al demonstrated that the blending of PLA and PC markedly improved the filament processability as well as FDM printability, with the resulting polymer blend filaments.…”

Section: Introductionmentioning

confidence: 99%

Acrylonitrile Butadiene Styrene/Thermoplastic Polyurethane Blends for Material Extrusion Three-Dimensional Printing: Effects of Blend Composition on Printability and Properties

Thavornyutikarn,

Aumnate,

Kosorn

et al. 2023

ACS Omega

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Blend filaments of acrylonitrile butadiene styrene (ABS) and thermoplastic polyurethane (TPU) were prepared at different weight ratios, i.e., 100:0, 70:30, 50:50, 30:70, and 0:100, for FDM printing; the prepared filaments, with an average diameter of 2.77 ± 0.19 mm, were encoded as A100, A70T30, A50T50, A30T70, and T100, respectively. The properties and printability of the filaments were thoroughly investigated. The blend composition, as well as the printing parameters, were optimized to obtain the FDM-printed objects with a well-defined surface structure and minimized warpages. The glass transition temperatures of ABS and TPU in the blends were not much altered from those of the parent filaments, whereas the thermal degradation characteristics of the blend filaments still fell between those of the neat filaments. The fractured surfaces of the filaments, observed by SEM, appeared smoother when higher amounts of TPU integrated; the smoothest surface of the ABS-based filament was found in A30T70, indicating the well-compatible blend characteristic. This was also confirmed by its rheological behavior examined by a parallel plate rheometer at 225 °C. Not only was the printability of the filaments improved, but also the warpages of the 3D-printed specimens were decreased when increasing amount of TPU was incorporated into the filaments. Among the printed objects, the A30T70 specimen exhibited the evenest surface morphology with the lowest surface roughness value of 32.9 ± 13.2 nm and the most uniform and consistent linear printing structure when being fabricated at the nozzle temperature of 225 °C and the printing bed temperature of 60 °C. However, the incorporation of TPU into the filaments markedly cut down both strength and modulus values of the fabricated materials up to about half but assisted the printed articles to absorb more energy, demonstrating that this polymer served as a good and effective toughener for ABS.

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“…Due to the great environmental impact that conventional petroleum-based polymers promote during its production, more and more biodegradable polymers based on renewable sources (biopolymers) arouse interest [1][2][3][4] in the production of new polymeric systems. Using of these biomaterials, considered eco-friendly, has been gaining prominence in the specialized polymers literature, in the polymeric blends processing, 3,[5][6][7] reactive mixtures, [8][9][10] composites and polymeric nanocomposites, [11][12][13][14][15] for instance.…”

Section: Introductionmentioning

confidence: 99%

Tailoring the performance of poly(lactic acid)‐based reactive blends: The effect of vinyl acetate and dicumyl peroxide content

Ferreira

Nascimento

Luna

et al. 2023

J of Applied Polymer Sci

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Poly(lactic acid) has been gaining prominence in academia and industry, mainly due to being a biopolymer and biodegradable material. Nevertheless, mainly due to its high fragility, work has been carried out in order to seek alternatives to improve this drawback. Hence, this work aims to evaluate the effect of the vinyl acetate content using two types of EVA (EVA1 with 28% and EVA2 with 19%) in dynamically vulcanized PLA/EVA blends, using several dicumyl peroxide (DCP) contents, that is, 0.3, 0.5, and 0.7 phr. Blends were produced using an internal mixer, and the tensile, impact and HDT specimens were injection molded. By FTIR and torque rheometry, it was verified that, upon DCP addition, there was evidences of reticulation, resulting in crosslinked PLA, crosslinked EVA, as well as PLA‐g‐EVA. Through tensile and impact strength tests, it was observed substantial increases in the elongation at break, and in impact strength, mainly for the compounds with higher content of vinyl acetate (EVA1). Impact specimens made with PLA/EVA120 0.7 DCP, PLA/EVA130 0.5 DCP, and 0.7 DCP, did not completely break, due to the probable development of the in situ PLA‐g‐EVA compatibilizer among the present phases. Therefore, it is believed that a more homogeneous microstructure was obtained, as observed by SEM images, highlighted upon the DCP content increase. It was verified that the highest vinyl acetate content is of paramount importance for obtaining PLA/EVA blends with better compatibility as well as EVA1 being more susceptible to crosslinking using DCP, resulting in blends with greater toughness.

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Preparation and Characterization of Super-Toughened PLA/CPU Blends via One-step Dynamic Vulcanization

Cited by 17 publications

References 41 publications

Bioinspired Nanoheterogeneous Alternating Multiarched Architecture: Toward a Superior Strength–Toughness Integration

Bioinspired Nanoheterogeneous Alternating Multiarched Architecture: Toward a Superior Strength–Toughness Integration

Acrylonitrile Butadiene Styrene/Thermoplastic Polyurethane Blends for Material Extrusion Three-Dimensional Printing: Effects of Blend Composition on Printability and Properties

Tailoring the performance of poly(lactic acid)‐based reactive blends: The effect of vinyl acetate and dicumyl peroxide content

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