Ultrasound‐induced nucleation in microcellular polymers

Gandhi, Abhishek; Asija, Neelanchali; Chauhan, Hemant; Bhatnagar, Naresh

doi:10.1002/app.40742

Cited by 33 publications

(31 citation statements)

References 22 publications

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“…However, microcellular foams need high pressure and a long time to saturate the gas into the material, and the procedure is complicated, i.e., both gas saturation and high foaming temperature are required . Moreover, after microcellular foaming, the mechanical property of ABS decreased, and a higher sonic power was needed to produce high quality foams (i.e., small cell size and high cell density) . If ABS can be economically foamed at atmospheric condition without gas saturation and the original strength can be preserved in this process, then it can be extensively applied in many areas, such as packaging, automotive, home construction, toys, aerospace, medical prostheses, and telecommunication…”

Section: Introductionmentioning

confidence: 94%

“…These microcellular foams were characterized by a cell density typically higher than 10 9 cells/cm 3 and small cells on the order 10 μm in diameter, which can significantly improve the thermal and sound insulation of the material . Moreover, by using ultrasonics, the foams became smaller and the porosity of the material was higher than the non‐sonicated samples . However, microcellular foams need high pressure and a long time to saturate the gas into the material, and the procedure is complicated, i.e., both gas saturation and high foaming temperature are required .…”

Section: Introductionmentioning

confidence: 99%

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Structural, mechanical, and thermal properties of 3D printed L‐CNC/acrylonitrile butadiene styrene nanocomposites

Feng

Yang

Rostom³

et al. 2017

J of Applied Polymer Sci

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3D printing has been extensively applied in human‐related activities, and therefore the 3D printed nanocomposites became more popular and important in end‐use products. In the present study, we use lignin‐coated cellulose nanocrystal (L‐CNC) to reinforce 3D printed acrylonitrile butadiene styrene (ABS) and explore the effect of L‐CNC on the structural, mechanical, and thermal properties of 3D printed L‐CNC/ABS nanocomposites. The results indicate that the addition of L‐CNC foams the ABS and decreases the density of 3D printed L‐CNC/ABS nanocomposites. However, the tensile modulus and storage modulus increase by adding 4% L‐CNC. The thermal stability of 3D printed L‐CNC/ABS nanocomposites is also significantly improved as indicated by an increase in the maximum degradation temperature. The morphology of the nanocomposites reveals good dispersion and interfacial adhesion between L‐CNC and ABS. The finding indicates that the 3D printed nanocomposites become lighter and stiffer with addition of L‐CNC, which will have great potential to be applied in end‐use products. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45082.

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Structural, mechanical, and thermal properties of 3D printed L‐CNC/acrylonitrile butadiene styrene nanocomposites

Feng

Yang

Rostom³

et al. 2017

J of Applied Polymer Sci

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“…Recently, researches made at the Indian Institute of Technology in Delhi have been published on new technologies based on ultrasounds for the development of high quality microcellular foams [38,39]. In [40], we can see a micrograph of a sample obtained by this Institute.…”

Section: Microcellular Plasticsmentioning

confidence: 99%

Image Segmentation Applied to the Study of Micrographs of Cellular Solids

Sparavigna¹

2017

ijSciences

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Abstract:The paper is proposing a method of image segmentation applied to the study of the micrographs of cellular solids. The segmentation is based on a thresholding which creates a binary (black and white) image of the micrograph. The binary image is divided in super-pixels which correspond to the microcells of the material. From the areas of the super-pixels it is easy to evaluate the distribution of the size of the cells and correlate this distribution to the properties of the material.

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“…Numerous researchers and diverse inter-disciplinary industries have been very active in the field of extrusion foaming in the last few years, primarily because it allows them to manufacture thermoplastic foams continuously [8][9][10][11][12][13][14]. Extruded thermoplastic foams are being utilized in several distinct industrial fields such as in filters, membranes, packaging, biomedical tissue engineering, thermal insulation and sound dampening applications [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Die opening-induced microstructure growth in extrusion foaming of thermoplastic sheets

Gandhi

Bhatnagar

2015

Journal of Polymer Engineering

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Abstract In this study, the influence of die opening gap on foam attributes during a microcellular extrusion foaming process was investigated. Lower die openings developed higher pressure drops on the foams, as a result of which greater thermodynamic instability was stimulated and, consequently, higher cell density foams along with enhanced expansion ratios were achieved. Further investigations were performed to study the synergistic influence of altering die opening with critical process parameters, namely, screw rotational speed and die temperature, on the foam expansion ratio and morphological transformations. Higher screw rotational speed induced shear nucleation phenomenon, which further enhanced the foaming process significantly. Also, an optimum die temperature was observed, which developed maximum expansion ratio at the lowest die opening gap. This study intends to enhance the understanding of extrusion foam processing among academia as well as among industries.

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Ultrasound‐induced nucleation in microcellular polymers

Abstract: In the published article cited above, the following error was discovered.The journal citation was incorrectly cited as: 8. Guo, H.; Nadella, K.; Kumar, V. J. Mater. Sci. 2013, 28, 2374 Below is the correct citation information: 8. Guo, H.; Nadella, K.; Kumar, V.

Cited by 33 publications

References 22 publications

Structural, mechanical, and thermal properties of 3D printed L‐CNC/acrylonitrile butadiene styrene nanocomposites

Structural, mechanical, and thermal properties of 3D printed L‐CNC/acrylonitrile butadiene styrene nanocomposites

Image Segmentation Applied to the Study of Micrographs of Cellular Solids

Die opening-induced microstructure growth in extrusion foaming of thermoplastic sheets

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