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Polymers
Special Issues
Additives in Action
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Additives in Action

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

Deadline for manuscript submissions: closed (25 August 2023) | Viewed by 4856

Special Issue Editor

Dr. Béla Fiser

E-Mail Website
Guest Editor
Institute of Chemistry, University of Miskolc, Miskolc-Egyetemváros, 3515 Miskolc, Hungary
Interests: polymers; computational chemistry; polycyclic aromatic hydrocarbons; reaction mechanisms; catalysis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Pure polymeric materials are faced with several problems, including stability and durability issues, and so additives are widely used in polymer production in order to achieve the desired properties. Therefore, the development and research of polymers cannot be separated from additive technologies. Additives can be incorporated into the formulation of the base polymers, thus improving processability, prolonging the lifespan, and enhancing the physical and chemical behaviour of the final product.

The aim of this Special Issue of Polymers, entitled “Additives in Action”, is to cover the most recent progress in the field of polymer additives. This Special Issue will consider green solutions, new applications of synthetic, natural, and bio-additives, as well as the experimental and theoretical characterization of the final products. Both research and review papers are welcome.

Dr. Béla Fiser
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
  • characterization
  • molecular modelling
  • additives
  • plasticizers
  • flame-retardants
  • antioxidants
  • UV stabilizers
  • colorants

Published Papers (2 papers)

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Research

13 pages, 3654 KiB  
Article
A Theoretical Study on the Phosgenation of 2,4-Toluenediamine (2,4-TDA)
by Ravikumar Thangaraj, Tamás Horváth, R. Zsanett Boros, Béla Viskolcz and Milán Szőri
Polymers 2022, 14(11), 2254; https://doi.org/10.3390/polym14112254 - 31 May 2022
Cited by 6 | Viewed by 1970
Abstract
Industrially relevant phosgenation mechanisms of 2,4-toluenediamine (2,4-TDA) were investigated using G3MP2B3 model chemistry. Six reaction pathways had been explored, which resulted in the formation of toluene diisocyanate (2,4-TDI) including different scenarios of the ‘phosgenations first’ and ‘consecutive phosgenations’ mechanisms in both gas and [...] Read more.
Industrially relevant phosgenation mechanisms of 2,4-toluenediamine (2,4-TDA) were investigated using G3MP2B3 model chemistry. Six reaction pathways had been explored, which resulted in the formation of toluene diisocyanate (2,4-TDI) including different scenarios of the ‘phosgenations first’ and ‘consecutive phosgenations’ mechanisms in both gas and condensed phases. Two possible ‘phosgenations first’ mechanisms show superior to the others in terms of energy, regardless of which phases are considered. Due to the o-dichlorobenzene (ODCB) solvation, the reaction barriers are dramatically reduced compared to the gas-phase reaction mechanism and the solvent effect can be described by linear relationship. Standard enthalpy of formation value was also recommended for 2,4-TDA (59.3 kJ/mol) and 2,4-TDI (−94.1 kJ/mol), as well as for the gas-phase intermediates (IM). Full article
(This article belongs to the Special Issue Additives in Action)
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14 pages, 4255 KiB  
Article
Prediction of Durability of Thermal Insulating Epoxy Coatings with Regard to Climatic Ageing
by Zhanar O. Zhumadilova, Vladimir P. Selyaev, Ruslan E. Nurlybayev, Yelzhan S. Orynbekov, Indira B. Sangulova and Erzhan I. Kuldeyev
Polymers 2022, 14(9), 1650; https://doi.org/10.3390/polym14091650 - 19 Apr 2022
Cited by 5 | Viewed by 1643
Abstract
It is generally accepted that the color and performance characteristics of liquid thermal insulation coatings are affected by the combined effect of various climatic factors such as solar radiation, temperature fluctuations, moisture, precipitation and others. This work presents the results of a scientific [...] Read more.
It is generally accepted that the color and performance characteristics of liquid thermal insulation coatings are affected by the combined effect of various climatic factors such as solar radiation, temperature fluctuations, moisture, precipitation and others. This work presents the results of a scientific study of the full-scale exposure of coatings with regard to climatic ageing. Methods have been carried out, such as: spectrophotometry and direct scanning; determining adhesion, determining the adhesion strength of facing and protective coatings; and thermal conductivity and thermal resistance. As the results of the research work have shown, only in situ climatic tests, accompanied by the obligatory recording of the aggressive factors affecting the coating, make it possible to assess changes in the properties of epoxy coatings in full-scale conditions and, consequently, their climatic resistance by the methods of spectrophotometry and direct scanning. The ageing of polymer composites is known to be accompanied by a change not only in elasticity but also in color. Of the epoxy coatings tested, Etal-45M showed the greatest color variation during the in situ climate test. The most decorative resistant coatings are obtained using epoxy resin ED-20 + modified epoxy resin Etal-1440N. Full article
(This article belongs to the Special Issue Additives in Action)
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