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Smart Polymers and Mechanical Metamaterials

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

Deadline for manuscript submissions: 30 September 2025 | Viewed by 1239

Special Issue Editors


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Guest Editor
School of Civil Aviation, Northwestern Polytechnical University, Xi’an 710072, China
Interests: smart materials; mechanical metamaterials; soft robots; additive manufacturing
Special Issues, Collections and Topics in MDPI journals
School of Civil Aviation, Northwestern Polytechnical University, Xi’an 710072, China
Interests: smart materials; mechanical metamaterials; additive manufacturing
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The field of smart polymers and mechanical metamaterials has seen remarkable advancements, with applications ranging from biomedical devices to aerospace engineering. This Special Issue aims to bring together cutting-edge research that explores the design, synthesis, characterization, and application of smart polymers and metamaterials. Topics of interest include but are not limited to (1) the synthesis and functionalization of smart polymers with customizable properties; (2) the design, fabrication, and characterization of novel mechanical metamaterials; (3) the use of smart polymers in the development of innovative mechanical metamaterials; (4) additive manufacturing techniques for smart polymers and their integration into metamaterial structures; (5) applications of smart polymers and metamaterials in fields such as biomedical devices, robotics, and aerospace engineering.

Dr. Xiaojun Tan
Dr. Bo Cao
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

  • smart polymers
  • mechanical metamaterials
  • additive manufacturing
  • lightweight structures
  • shape memory polymer
  • design and optimization
  • preparation processes
  • mechanical tests
  • soft robots

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Published Papers (1 paper)

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Research

12 pages, 6839 KiB  
Article
The Influence of Mixed Powder Ageing on the Structural, Chemical, and Crystalline Morphological Properties of the PA12 Used to Manufacture Laser Sintering
by Alejandro García Rodríguez, Edgar Espejo Mora, Marco Antonio Velasco Peña and Carlos Alberto Narváez Tovar
Polymers 2025, 17(5), 577; https://doi.org/10.3390/polym17050577 - 22 Feb 2025
Viewed by 679
Abstract
This study investigated the effects of multiple laser sintering (LS) cycles on a polyamide 12 powder mixture of 70% recycled material and 30% virgin polymer. This research aimed to understand how repeated LS processing influences this specific powder mixture’s thermal and structural properties, [...] Read more.
This study investigated the effects of multiple laser sintering (LS) cycles on a polyamide 12 powder mixture of 70% recycled material and 30% virgin polymer. This research aimed to understand how repeated LS processing influences this specific powder mixture’s thermal and structural properties, which is crucial for optimising its performance in additive manufacturing applications. A thermal analysis revealed significant changes in the thermal behaviour of the powder over successive build cycles. Specifically, there was an observed increase in both the melting temperature and the crystallinity of the powder, alongside a notable decrease in the crystallisation temperature. These alterations suggest that the repeated LS cycles affect the thermal profiles and potentially enhance the material’s stability and usability in additive manufacturing processes. Additionally, a particle size distribution analysis indicated statistically significant differences between the initial and post-sintering states of the powder. These differences are significant as they can influence factors such as flowability and packing density, which are critical for the efficiency of additive manufacturing applications. Microscopic observations further revealed a strong correlation between the crystal morphologies and particle shapes, indicating that the structural changes occurring during processing are inter-related. The relationship underscores the importance of understanding microstructural evolution and the mechanical properties of the final printed products. These findings provide crucial insights into the microstructural evolution and thermal behaviour of recycled PA12 powder during multiple LS processing cycles. This study aids in developing practical strategies for sustainable and efficient powder recycling within the realm of additive manufacturing. By examining the intricate dynamics at play, the research opens avenues for enhancing the performance and environmental sustainability of 3D printing technologies, making them more accessible for various industrial applications. Full article
(This article belongs to the Special Issue Smart Polymers and Mechanical Metamaterials)
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