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Special Issue "Synthesis of Advanced Polymer Materials 2.0"

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A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Macromolecules".

Deadline for manuscript submissions: 10 April 2024 | Viewed by 1951

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Prof. Dr. Haiyang Gao

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Guest Editor

School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
Interests: polymer chemistry; polymer synthesis; catalytic olefin polymerization; organometallic catalysts; metal-catalyzed polymerization; polyolefins
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Dear Colleagues,

Polymer materials are found in almost every material used in daily life, and their importance has been highlighted because of their wide applications. With the rapid development of modern society, developing new and/or advanced polymer materials is constantly required. Therefore, the synthesis of advanced polymers has attracted considerable attention. This Special Issue of the International Journal of Molecular Sciences will focus on a collection of excellent research articles and review papers related to the synthesis of advanced polymer materials involving polymer synthesis, polymer chemistry, and polymer functionalization and modification. Every paper submitted for consideration is welcomed to report novel synthesis techniques, new synthesis methods and approaches (especially catalytic systems for polymer synthesis), new polymer materials originating from new monomers or comonomers, chemical modifications of polymers, etc.

Due to the success of the first edition of this Special Issue, we would like to add more results and new insights from recent research projects.

https://www.mdpi.com/journal/ijms/special_issues/XP94U2A650

Prof. Dr. Haiyang Gao
Guest Editor

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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. International Journal of Molecular Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

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Keywords

polymer synthesis
polymer chemistry
coordination polymerization
organometallic catalysts
polyolefin
degradable polymer materials
green and sustainable polymeric materials
homogeneous polymerization
heterogeneous polymerization

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Synthesis of Advanced Polymer Materials in International Journal of Molecular Sciences (9 articles)

Published Papers (3 papers)

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Research

18 pages, 7895 KiB

Open AccessArticle

Constant Magnetic Field as a Tool for Modification of the Properties of Polymer Composites with Silicone Rubber Matrix

Dorota Czarnecka-Komorowska

Dariusz Sroczyński

and

Anna Fenyk

Int. J. Mol. Sci. 2023, 24(23), 16625; https://doi.org/10.3390/ijms242316625 - 22 Nov 2023

Viewed by 269

Abstract

The aim of this research was to obtain new polymer composites with a silicone rubber matrix, having favorable mechanical and functional properties. They contained admixtures in the amount of 10% by weight of expanded graphite (EG) or birch bark (BB). Additionally, some composites contained magnetic particles in the form of carbonyl iron in the amount of 20% by weight. The tensile strength, water absorption, frost resistance, surface contact angle, and free surface energy were examined. Microscopic images were taken using the SEM method and the content of some elements in selected microareas was determined using the EDXS method. In the study, a constant magnetic field with magnetic induction B was used, by means of which the properties and structure of polymer composites were modified. Scientific research in the field of polymers is the driving force behind the progress of civilization. Smart materials are able to respond to external stimuli, such as magnetic fields, with significant changes in their properties. The magnetic field affects not only chemical reactions, but also the crystallographic structure and physicochemical properties of the final products. Owing to their unique properties, such materials can be used in the space industry, automotive industry, or electrical engineering. Full article

(This article belongs to the Special Issue Synthesis of Advanced Polymer Materials 2.0)

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12 pages, 2053 KiB

Open AccessArticle

Experimental–Density Functional Theory (DFT) Study of the Inhibitory Effect of Furan Residues in the Ziegler–Natta Catalyst during Polypropylene Synthesis

Joaquín Hernández-Fernández

Esneyder Puello-Polo

and

Edgar Marquez

Int. J. Mol. Sci. 2023, 24(18), 14368; https://doi.org/10.3390/ijms241814368 - 21 Sep 2023

Viewed by 791

Abstract

In this experimental–theoretical study, the effect of furan on Ziegler–Natta catalyst productivity, melt flow index (MFI), and mechanical properties of polypropylene were investigated. Through the analysis of the global and local reactivity of the reagents, it was determined that the furan acts as an electron donor. In contrast, the titanium of the ZN catalyst acts as an electron acceptor. It is postulated that this difference in reactivity could lead to forming a furan–titanium complex, which blocks the catalyst’s active sites and reduces its efficiency for propylene polymerization. Theoretical results showed a high adsorption affinity of furan to the active site of the Ti catalyst, indicating that furan tends to bind strongly to the catalyst, thus blocking the active sites and decreasing the availability for propylene polymerization. The experimental data revealed that the presence of furan significantly reduced the productivity of the ZN catalyst by 10, 20, and 41% for concentrations of 6, 12.23, and 25.03 ppm furan, respectively. In addition, a proportional relationship was observed between the furan concentration and the MFI melt index of the polymer, where the higher the furan concentration, the higher the MFI. Likewise, the presence of furan negatively affected the mechanical properties of polypropylene, especially the impact Izod value, with percentage decreases of 9, 18, and 22% for concentrations of 6, 12.23, and 25.03 ppm furan, respectively. Full article

(This article belongs to the Special Issue Synthesis of Advanced Polymer Materials 2.0)

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17 pages, 6273 KiB

Open AccessArticle

A Rigid–Flexible and Multi-Siloxane Bridge Strategy for Toughening Epoxy Resin with Promising Flame Retardancy, Mechanical, and Dielectric Properties

and

Int. J. Mol. Sci. 2023, 24(18), 14059; https://doi.org/10.3390/ijms241814059 - 13 Sep 2023

Viewed by 588

Abstract

Developing highly efficient and multifunctional epoxy resins (EPs) that overcome the shortcomings of flammability and brittleness is crucial for pursuing sustainable and safe application but remains a huge challenge. In this paper, a novel biomass-containing intumescent flame retardant containing a rigid–flexible and multi-siloxane bridge structure (DPB) was synthesized using siloxane; 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO); and biomass vanillin. DPB could facilitate the formation of a carbon residual with an intumescent structure, which effectively blocked the propagation of heat and oxygen. As a result, the peak heat release rate (pHRR) and total heat release (THR) of DPB/EP-7.5 decreased by 38.8% and 45.0%, respectively. In terms of mechanical properties, the tensile and flexural elongations at break of DPB/EP-7.5 increased by 77.2% and 105.3%, respectively. Impressively, DPB/EP-7.5 had excellent dielectric properties, with a dielectric constant of 2.5–2.9. This was due to the Si-O bonds (multi-siloxane bridges) contained in DPB/EP, which can quench the polarization behavior of the hydroxyl group. This paper provides a facile strategy for the preparation of multifunctional EP, which will pave the way for the promotion and application of EP in the high-end field. Full article

(This article belongs to the Special Issue Synthesis of Advanced Polymer Materials 2.0)

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