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Polymers
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New Progress of Polymeric Materials in Advanced Manufacturing
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New Progress of Polymeric Materials in Advanced Manufacturing

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 August 2024) | Viewed by 9852

Special Issue Editor

Prof. Dr. Richard (Chunhui) Yang

E-Mail Website
Guest Editor
School of Engineering, Design and Built Environment, Western Sydney University, Penrith, NSW 2751, Australia
Interests: additive manufacturing; advanced manufacturing; multiscale modeling and simulations of advanced engineering materials and structures; engineering numerical methods and their applications; digital material representation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Advanced manufacturing under the 4th Industrial revolution (Industry 4.0) represents an important component of advanced materials, particularly concerning polymers, polymeric composites, and nanocomposites. This Special Issue aims to serve as an influential collection of high-quality articles contributed from both practitioners and researchers in relevant fields of research on advanced manufacturing and polymer science in addition to engineering—from the fundamentals to applications via analytical modelling, numerical modelling and simulations, and experimental study. Topics of interest for publication include but are not limited to:

  • New polymers, polymeric composites, and nanocomposites
  • Preparation, fabrication, and characterisation of new polymers, polymeric composites, and nanocomposites
  • New manufacturing technologies of polymers, polymeric composites, and nanocomposites, e.g., additive manufacturing (3D printing)
  • New applications of polymers, polymeric composites, and nanocomposites in advanced manufacturing, e.g., for sensors, robots, automation components, etc.

Prof. Dr. Richard (Chunhui) Yang
Guest Editor

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

  • polymers
  • polymeric composites
  • polymeric nanocomposites
  • advanced manufacturing
  • material fabrication and characterisation
  • numerical modelling and simulations
  • analytical modelling
  • experimental study

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (5 papers)

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Research

21 pages, 10677 KiB  
Article
Hot Embossing to Fabricate Parylene-Based Microstructures and Its Impact on the Material Properties
by Florian Glauche, Franz Selbmann, Markus Guttmann, Marc Schneider, Stefan Hengsbach, Yvonne Joseph and Harald Kuhn
Polymers 2024, 16(15), 2218; https://doi.org/10.3390/polym16152218 - 3 Aug 2024
Viewed by 1416
Abstract
This study aims to establish and optimize a process for the fabrication of 3D microstructures of the biocompatible polymer Parylene C using hot embossing techniques. The different process parameters such as embossing temperature, embossing force, demolding temperature and speed, and the usage of [...] Read more.
This study aims to establish and optimize a process for the fabrication of 3D microstructures of the biocompatible polymer Parylene C using hot embossing techniques. The different process parameters such as embossing temperature, embossing force, demolding temperature and speed, and the usage of a release agent were optimized, utilizing adhesive micropillars as a use case. To enhance compatibility with conventional semiconductor fabrication techniques, hot embossing of Parylene C was adapted from conventional stainless steel substrates to silicon chip platforms. Furthermore, this adaptation included an investigation of the effects of the hot embossing process on metal layers embedded in the Parylene C, ensuring compatibility with the ultra-thin Parylene printed circuit board (PCB) demonstrated previously. To evaluate the produced microstructures, a combination of characterization methods was employed, including light microscopy (LM) and scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Fourier-transform infrared spectroscopy (FTIR). These methods provided comprehensive insights into the morphological, chemical, and structural properties of the embossed Parylene C. Considering the improved results compared to existing patterning techniques for Parylene C like plasma etching or laser ablation, the developed hot embossing approach yields a superior structural integrity, characterized by increased feature resolution and enhanced sidewall smoothness. These advancements render the method particularly suitable for diverse applications, including but not limited to, sensor optical components, adhesive interfaces for medical wearables, and microfluidic systems. Full article
(This article belongs to the Special Issue New Progress of Polymeric Materials in Advanced Manufacturing)
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13 pages, 3588 KiB  
Article
Injection Pultrusion of Glass-Reinforced Epoxy: Cure Kinetics, Rheology, and Force Analysis
by Fausto Tucci, Vitantonio Esperto, Germana Pasquino and Pierpaolo Carlone
Polymers 2024, 16(12), 1642; https://doi.org/10.3390/polym16121642 - 10 Jun 2024
Viewed by 841
Abstract
Pultrusion is a highly efficient continuous process to manufacture advanced fiber-reinforced composites. The injection pultrusion variant permits a higher control of the resin flow, enabling the manufacturing of a high reinforcement volume fraction. Moreover, it reduces the emission of volatile compounds that are [...] Read more.
Pultrusion is a highly efficient continuous process to manufacture advanced fiber-reinforced composites. The injection pultrusion variant permits a higher control of the resin flow, enabling the manufacturing of a high reinforcement volume fraction. Moreover, it reduces the emission of volatile compounds that are dangerous for the operators and for the working environment. The present study proposes an experimental analysis of injection pultrusion in three different operative conditions. In particular, the activity focused on the effects of the temperature setup on the thermochemical and rheological behaviors of the resin system and on the interaction between the processed materials and the pultrusion die wall. The setup of the parameters was selected to evidence the behavior of the viscous interaction during the thermoset transition to the solid state, which is particularly challenging due to the localization of high adhesive forces related to the sharp increase in resin viscosity. Microscope observations of the cross-sections were performed to discuss the effects of the process parameters. Full article
(This article belongs to the Special Issue New Progress of Polymeric Materials in Advanced Manufacturing)
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17 pages, 4262 KiB  
Article
Control of Particle Properties in Thermally-Induced Precipitation of Polyetherimide
by Laura Unger, Sybille Fischer, Jens P. W. Sesseg, Andreas Pfister, Jochen Schmidt and Andreas Bück
Polymers 2023, 15(8), 1944; https://doi.org/10.3390/polym15081944 - 19 Apr 2023
Cited by 2 | Viewed by 1590
Abstract
The feasibility of thermally-induced phase separation and crystallization for the production of semi-crystalline polyetherimide (PEI) microparticles from an amorphous feedstock has been reported recently. Here, we investigate process parameter dependencies for designing and control of particle properties. A stirred autoclave was used to [...] Read more.
The feasibility of thermally-induced phase separation and crystallization for the production of semi-crystalline polyetherimide (PEI) microparticles from an amorphous feedstock has been reported recently. Here, we investigate process parameter dependencies for designing and control of particle properties. A stirred autoclave was used to extend the process controllability, as the applied process parameters, e.g., stirring speed and cooling rate, were adjusted. By increasing the stirring speed, the particle size distribution was shifted to larger values (correlation factor ρ = 0.77). Although, the enhanced droplet breakup, induced by the higher stirring speed, led to the formation of smaller particles (ρ = −0.68), broadening the particle size distribution. The cooling rate showed a significant influence on the melting temperature, reducing it with a correlation factor of ρ = −0.77, as confirmed by differential scanning calorimetry. Lower cooling rates led to larger crystalline structures and enhanced the degree of crystallinity. The polymer concentration mainly affected the resulting enthalpy of fusion, as an increased polymer fraction enhanced the latter (correlation factor ρ = 0.96). In addition, the circularity of the particles was positively correlated to the polymer fraction (ρ = 0.88). The structure assessed via X-ray diffraction, was not affected. Full article
(This article belongs to the Special Issue New Progress of Polymeric Materials in Advanced Manufacturing)
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17 pages, 3237 KiB  
Article
Rational Design and Characterization of Materials for Optimized Additive Manufacturing by Digital Light Processing
by Rajat Chaudhary, Raziyeh Akbari and Carlo Antonini
Polymers 2023, 15(2), 287; https://doi.org/10.3390/polym15020287 - 6 Jan 2023
Cited by 8 | Viewed by 2478
Abstract
Additive manufacturing technologies are developed and utilized to manufacture complex, lightweight, functional, and non-functional components with optimized material consumption. Among them, vat polymerization-based digital light processing (DLP) exploits the polymerization of photocurable resins in the layer-by-layer production of three-dimensional objects. With the rapid [...] Read more.
Additive manufacturing technologies are developed and utilized to manufacture complex, lightweight, functional, and non-functional components with optimized material consumption. Among them, vat polymerization-based digital light processing (DLP) exploits the polymerization of photocurable resins in the layer-by-layer production of three-dimensional objects. With the rapid growth of the technology in the last few years, DLP requires a rational design framework for printing process optimization based on the specific material and printer characteristics. In this work, we investigate the curing of pure photopolymers, as well as ceramic and metal suspensions, to characterize the material properties relevant to the printing process, such as penetration depth and critical energy. Based on the theoretical framework offered by the Beer–Lambert law for absorption and on experimental results, we define a printing space that can be used to rationally design new materials and optimize the printing process using digital light processing. The proposed methodology enables printing optimization for any material and printer combination, based on simple preliminary material characterization tests to define the printing space. Also, this methodology can be generalized and applied to other vat polymerization technologies. Full article
(This article belongs to the Special Issue New Progress of Polymeric Materials in Advanced Manufacturing)
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19 pages, 3619 KiB  
Article
Predicting Material Properties of Additively Manufactured Acrylonitrile Butadiene Styrene via a Multiscale Analysis Process
by Phan Quoc Khang Nguyen, Nima Zohdi, Patrick Kamlade and Richard (Chunhui) Yang
Polymers 2022, 14(20), 4310; https://doi.org/10.3390/polym14204310 - 13 Oct 2022
Cited by 10 | Viewed by 2490
Abstract
Additive manufacturing (AM) has inherent mechanical strength inconsistencies when the build orientation changes. To address this issue, theoretical models, including analytical and numerical models, can be developed to predict the material properties of additively manufactured materials. This study develops a systematic finite element [...] Read more.
Additive manufacturing (AM) has inherent mechanical strength inconsistencies when the build orientation changes. To address this issue, theoretical models, including analytical and numerical models, can be developed to predict the material properties of additively manufactured materials. This study develops a systematic finite element (FE)-based multiscale numerical model and simulation process for the polymer acrylonitrile butadiene styrene (ABS). ABS samples are fabricated using fused deposition modelling (FDM) to determine the material properties and mechanical behaviours. For macroscale analysis, good agreement between the numerical and experimental tensile strength of transverse samples proved that the FE model is applicable for applying a reverse engineering method in simulating the uniaxial tension of samples. The FE modelling method shows its capability to consider infill density effects. For mesoscale analysis, two methods are developed. The first method is a representative volume element (RVE)-based numerical model for all longitudinal samples. The second method is analytical and based on the rule of mixtures (ROM). Modified rule of mixtures (MROM) models are also developed, which demonstrate an improvement compared to the original ROM models. The research outcomes of this study can facilitate the AM process of parts in various engineering fields. Full article
(This article belongs to the Special Issue New Progress of Polymeric Materials in Advanced Manufacturing)
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