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Polymers
Special Issues
Advanced Spectroscopy for Polymers: Design and Characterization
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Advanced Spectroscopy for Polymers: Design and Characterization

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

Deadline for manuscript submissions: 31 January 2026 | Viewed by 232

Special Issue Editor

Dr. Takayasu Kawasaki

E-Mail Website
Guest Editor
Accelerator Laboratory, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba 305-0801, Ibaraki, Japan
Interests: amyloid; biopolymers; infrared laser; terahertz radiation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Analytical techniques are essential in polymer research and have been continuously developed today. In particular, the research and development of bio-degradation polymers and recyclable polymers and the monomerization techniques are emphasized from the perspective of realizing a sustainable society, and the roles of analytical methods in these research fields are very important. Also, the analytical techniques for biological polymers such as proteins, polysaccharides, fatty acids, and aromatic biopolymers can be utilized in the developments of foods, pharmaceutical drugs, and cosmetic materials. In this Special Issue, the spectroscopic methods are a major focus of many analytical techniques. For example, analytical studies using near-, mid-, and far-infrared spectroscopies, Raman spectroscopy, ultra-violet and visible spectroscopies, NMR, and mass spectrometry are welcome. Also, synchrotron radiation-based analytical technologies for structural biology such as X-ray spectroscopy, small-angle X-ray scattering, and electron microscopy are accepted.

Dr. Takayasu Kawasaki
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

  • infrared spectroscopy
  • synchrotron radiation
  • mass spectrometry
  • ESI-MS
  • MALDI-TOFMS
  • laser
  • terahertz spectroscopy
  • electron microscopy
  • optical microscopy
  • X-ray

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Published Papers (1 paper)

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Research

16 pages, 756 KiB  
Article
New Insight into the Microstructure Changes and Molecular Mobility of Polyamides Exposed to H2S Scavengers
by Marina Perassoli de Lazari, Antonio Henrique Monteiro da Fonseca Thomé da Silva, Rodrigo Henrique dos Santos Garcia, Sylvia Correa dos Santos Teixeira, João Eduardo de Oliveira, Érica Gervasoni Chaves, Luiz Antônio de Oliveira Nunes, Hercílio de Angeli Honorato, Sonia Maria Cabral de Menezes, Aline Pinde Lima, Luiz Silvino Chinelatto Junior and Eduardo Ribeiro de Azevedo
Polymers 2025, 17(12), 1634; https://doi.org/10.3390/polym17121634 - 12 Jun 2025
Abstract
Polyamides (PAs) are widely used as barrier materials in offshore oil and gas (O&G) equipment due to their mechanical strength and chemical resistance. However, long-term exposure to hydrogen sulfide scavengers (H2S-SCVs) may significantly affect their physicochemical properties. Previous studies using thermal [...] Read more.
Polyamides (PAs) are widely used as barrier materials in offshore oil and gas (O&G) equipment due to their mechanical strength and chemical resistance. However, long-term exposure to hydrogen sulfide scavengers (H2S-SCVs) may significantly affect their physicochemical properties. Previous studies using thermal analysis and 1H time-domain NMR (1H TD-NMR) suggest that ethoxylated H2S-SCVs impose molecular constraints, increasing the glass transition temperature (Tg) and reducing chain mobility above Tg. The present study builds upon these findings using a multi-technique analytical approach, including FTIR, Raman, 1H DQ-TD-NMR, and 13C solid-state NMR (ssNMR), to provide a more comprehensive understanding of the molecular alterations in PA materials. The results clearly demonstrate that H2S-SCV exposure leads to the progressive exudation of plasticizers from the PA matrix. This plasticizer loss is a key factor contributing to the observed shift in Tg and the reduction in molecular mobility. 1H DQ-TD-NMR data confirmed an increase in the density of dynamically constrained chains over time and allowed for the characterization of heterogeneity in these constraints throughout the PA matrix. Moreover, 13C ssNMR spectra revealed the presence of immobilized H2S-SCV chemical groups within the polymer matrix, strongly supporting the early statement that the mobility constraints observed in 1H DQ-TD-NMR are associated with the formation of crosslinks induced by the H2S-SCV: H2S-SCV acts as a crosslinking agent. Taken together, our findings indicate that both plasticizer loss and H2S-SCV-induced crosslinking contribute significantly to the microstructural evolution of PAs when exposed to ethoxylated H2S-SCVs, offering important insights into their degradation mechanisms and long-term behavior in aggressive operational environments. Full article
(This article belongs to the Special Issue Advanced Spectroscopy for Polymers: Design and Characterization)
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