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Polymers
Special Issues
Additive Manufacturing and Rheology of Polymer Materials
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Additive Manufacturing and Rheology of Polymer Materials

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Processing and Engineering".

Deadline for manuscript submissions: closed (31 January 2023) | Viewed by 3742

Special Issue Editors

Dr. Xiang Lin

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Guest Editor
School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
Interests: polymer processing and technology; processing rheology of plastic and rubber; additive manufacturing of advanced polymer materials
Dr. Runguo Wang

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Guest Editor
College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
Interests: polymer chemistry; bio-material; additive manufacturing
Dr. Sisi Wang

E-Mail Website
Guest Editor
Key Laboratory of Urban Rail Transit Intelligent Operation and Maintenance Technology & Equipment of Zhejiang Province, College of Engineering, Zhejiang Normal University, Jinhua 321004, China
Interests: continuous fiber; 3D printing; biodegradable polymers
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Qingshi Meng

E-Mail Website
Guest Editor
College of Aerospace Engineering, Shenyang Aerospace University, Shenyang 110136, China
Interests: composite additive manufacturing; aircraft manufacturing engineering; impact-resistant composite coatings for aviation; graphene sensors and thermoelectric composites for aerospace application
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The precise control of the shape and performance of additively manufactured polymer parts is greatly dependent on the rheological properties of the adopted material. The wide application of additive manufacturing techniques in practical industry is largely limited by uncontrollable mechanical properties, dimension accuracy, printing efficiency etc., thus a thorough understanding of the additive manufacturing mechanism and its potential for performance improvement is required. The scope of this Special Issue ranges from novel printing technologies to new printable materials, material modification and the performance enhancement of printed objects, mainly focusing on insight into the processing–structure–properties relationships based on rheological regulation. 

We welcome the submission of papers on topics including but not limited to the following:

  • New techniques for the additive manufacturing of polymers;
  • Insights into the additive manufacturing of polymers;
  • Investigation of processing–structure–properties relationships;
  • Rheological analysis in printing processes;
  • Rheological regulation of printing materials;
  • Property enhancement based on rheological manipulation;
  • Discussion on the formation of interface layers;
  • Other topics in polymer additive manufacturing with the involvement of rheology.

Dr. Xiang Lin
Dr. Runguo Wang
Dr. Sisi Wang
Prof. Dr. Qingshi Meng
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Polymers is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • additive manufacturing
  • polymers and polymer composites
  • rheological properties
  • structure–function integration manufacturing
  • interface
  • mechanical properties
  • viscosity
  • viscoelasticity

Published Papers (2 papers)

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Research

18 pages, 5021 KiB  
Article
An Investigation of the Influence of Viscosity and Printing Parameters on the Extrudate Geometry in the Material Extrusion Process
by Shahriar Bakrani Balani, Hossein Mokhtarian, Tiina Salmi and Eric Coatanéa
Polymers 2023, 15(9), 2202; https://doi.org/10.3390/polym15092202 - 6 May 2023
Cited by 6 | Viewed by 1749
Abstract
The material extrusion process is one of the most popular additive manufacturing processes. The presence of porosity in the MEX printed parts, which ultimately deteriorates the mechanical properties, is one of the main drawbacks of the MEX process. The porosity in the structure [...] Read more.
The material extrusion process is one of the most popular additive manufacturing processes. The presence of porosity in the MEX printed parts, which ultimately deteriorates the mechanical properties, is one of the main drawbacks of the MEX process. The porosity in the structure is related to the shape of the adjacent beads and overlapping during the material deposition. Due to the deposition nature of the MEX process, the porosity cannot be entirely removed from the printed parts. Understanding the influence of process parameters on material deposition and the rheological properties is crucial to improving the quality of the final product. In this study, the two-phase-flow numerical approach with the level-set equations has been used for the first time to model the material deposition on the moving platform in 3D. The influence of the viscosity and printing parameters, including travel speed, inlet velocity, viscosity, nozzle diameter, and layer height, on the width of the deposited bead has been investigated. The simulation results are validated against experimental measurements with an average error of 5.92%. The width measured by the experimental study shows good agreement with the results of the numerical simulation. The comparison between the results of the 3D numerical simulation and 2D simulation reveals that the 2D simulation is not appropriate and accurate enough to predict the geometry of the deposited bead with the given set of parameter settings. The key novelty of this research paper is the application of the level-set method in a 3D context for material deposition on a moving substrate. Full article
(This article belongs to the Special Issue Additive Manufacturing and Rheology of Polymer Materials)
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13 pages, 4658 KiB  
Article
Rheological Behavior and Printability Study of Tri-Calcium Phosphate Ceramic Inks for Direct Ink Writing Method
by Belgin Paul D L, Ayyappan Susila Praveen, Lenka Čepová and Muniyandy Elangovan
Polymers 2023, 15(6), 1433; https://doi.org/10.3390/polym15061433 - 14 Mar 2023
Cited by 2 | Viewed by 1691
Abstract
In the biomedical industry, tricalcium phosphate is a bioceramic substance that is frequently employed in the fabrication of scaffolds and bone structures. Fabrication of porous ceramic structures using conventional manufacturing techniques is very challenging because of the brittle nature of the ceramics, which [...] Read more.
In the biomedical industry, tricalcium phosphate is a bioceramic substance that is frequently employed in the fabrication of scaffolds and bone structures. Fabrication of porous ceramic structures using conventional manufacturing techniques is very challenging because of the brittle nature of the ceramics, which has led to a newly adapted direct ink writing additive manufacturing method. This work investigates the rheology and extrudability of TCP inks to produce near-net-shape structures. Viscosity and extrudability tests found that stable TCP: Pluronic ink of 50 vol.% was more reliable compared to other tested inks prepared from a functional polymer group polyvinyl alcohol. A line study was carried out to identify the printing parameters suitable for printing structures from the selected ink with lesser dimensional error. Printing speed 5 mm/s and extrusion pressure 3 bar was found suitable to print a scaffold through a nozzle of 0.6 mm, keeping the stand-off distance equal to the nozzle diameter. The printed scaffold was further investigated for its physical and morphological structure of the green body. A suitable drying behavior was studied to remove the green body without cracking and wrapping before the sintering of the scaffold. Full article
(This article belongs to the Special Issue Additive Manufacturing and Rheology of Polymer Materials)
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