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Special Issue "Polymer Processing: Modeling and Correlations Finalized to Tailoring the Plastic Part Morphology and Properties"

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: 15 August 2018

Special Issue Editors

Guest Editor
Prof. Dr. Giuseppe Titomanlio

Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, I-84084 Fisciano, Italy
Website | E-Mail
Interests: polymer processing; flow induced crystallization and effect of crystallinity on rheology; morphology evolution during polymer processing; injection molding simulation
Guest Editor
Dr. Vito Speranza

Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, I-84084 Fisciano, Italy
Website | E-Mail
Interests: effect of thermomechanical history on final structure of polymeric materials; analysis and numerical simulation of the injection molding process of thermoplastic materials; polymeric materials characterization; atomic force microscopy

Special Issue Information

Dear Colleagues,

The analysis of polymer processing operations is a very wide and complex subject; indeed, during polymer processing, viscoelastic fluids are forced to deform into desired geometries using non-homogeneous velocity and temperature fields down to solidification. The objective of analysis is certainly the identification of processing conditions, which, more and more, are finalized to the optimization of product final properties, which, in their turn, are determined by the final part morphology.

Depending on the operating conditions, the properties of the final part can change even more than one order of magnitude. Properties of interest are certainly the mechanical, optical, barrier properties, the permeability, biodegradability and any other property of practical relevance including the characteristics of the surfaces as its finishing and wettability, which are connected one to the other.

The aim of this Special Issue is to select progresses or reviews in the understanding/description of the phenomena involved along the chain: Processing–morphology–properties. Obviously, along this virtual chain, the modeling may be a very useful approach  and within the objective of understanding  fundamental aspects it may also be relevant to compare selected characteristics of the process and of the material with characteristics of the resulting morphology and then with the properties of the final part. This approach suggested the title: “Polymer Processing: Modeling and Correlations Finalized to Tailoring the Plastic Part Morphology and Properties”.

Prof. Dr. Giuseppe Titomanlio
Dr. Vito Speranza
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 papers will be 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. Materials is an international peer-reviewed open access monthly 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 1600 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

  • polymer processing
  • modeling morphology evolution
  • morphology of polymeric parts in relation to their processing
  • morphology-properties relationships of polymeric parts
  • polymeric part properties

Published Papers (1 paper)

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Research

Open AccessArticle “Skin-Core-Skin” Structure of Polymer Crystallization Investigated by Multiscale Simulation
Materials 2018, 11(4), 610; doi:10.3390/ma11040610
Received: 16 March 2018 / Revised: 6 April 2018 / Accepted: 13 April 2018 / Published: 16 April 2018
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Abstract
“Skin-core-skin” structure is a typical crystal morphology in injection products. Previous numerical works have rarely focused on crystal evolution; rather, they have mostly been based on the prediction of temperature distribution or crystallization kinetics. The aim of this work was to achieve the
[...] Read more.
“Skin-core-skin” structure is a typical crystal morphology in injection products. Previous numerical works have rarely focused on crystal evolution; rather, they have mostly been based on the prediction of temperature distribution or crystallization kinetics. The aim of this work was to achieve the “skin-core-skin” structure and investigate the role of external flow and temperature fields on crystal morphology. Therefore, the multiscale algorithm was extended to the simulation of polymer crystallization in a pipe flow. The multiscale algorithm contains two parts: a collocated finite volume method at the macroscopic level and a morphological Monte Carlo method at the microscopic level. The SIMPLE (semi-implicit method for pressure linked equations) algorithm was used to calculate the polymeric model at the macroscopic level, while the Monte Carlo method with stochastic birth-growth process of spherulites and shish-kebabs was used at the microscopic level. Results show that our algorithm is valid to predict “skin-core-skin” structure, and the initial melt temperature and the maximum velocity of melt at the inlet mainly affects the morphology of shish-kebabs. Full article
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

1. Author: Giuseppe Titomamlio

2. Author: Mukerrem Cakmak

3. Author: Roberto Pantani

4. Author: Cengiz Altan

5. Type of the paper: Review

Tentative title: Additive Manufacturing of Metallic and Ceramic Components by Material Extrusion of Highly-Filled Polymers: A Review and Future Perspectives

Authors: Joamin Gonzalez-Gutierrez, Santiago Cano, Stephan Schuschnigg, Christian Kukla, Janak Sapkota, Clemens Holzer

Affiliations: Institute of Polymer Processing, Department of Polymer Engineering and Science, Montanuniversitaet Leoben.  and Industrial Liaison Department, Montanuniversitaet Leoben

Abstract: Additive manufacturing (AM) is the fabrication of real three dimensional objects from metals, ceramics or plastics by adding material usually as layers There are several variants of AM; among them material extrusion (ME) is one of the most versatile and widely used. In MEAM molten or viscous materials are pushed through an orifice and selectively deposited as strands to form stacked layers and subsequently a three dimensional object. The commonly used materials for MEAM are thermoplastic polymers and particulate composites; however recently innovative formulations of highly-filled polymers (HP) with metals or ceramics are also available. The MEAM with a HP is an indirect process which uses sacrificial polymeric binders to shape metallic and ceramic components. After removing the binder, the powder particles are fused together in a conventional sintering step. In this review the different types of MEAM techniques and relevant industrial approaches for the fabrication of metallic and ceramic components are described. The composition of certain HP binder systems and powders are presented; the methods of compounding and filament making HP are explained; the stages of shaping, debinding and sintering are discussed; and finally a comparison of the parts produced via MEAM-HP to other manufacturing techniques is presented.

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