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Polymers
Special Issues
Interpenetrating Polymer Networks as Versatile Materials
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Interpenetrating Polymer Networks as Versatile Materials

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

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 3285

Special Issue Editor

Dr. Daniel P. Otto

E-Mail Website
Guest Editor
Laboratory for Analytical Services, Research Focus Area for Chemical Resource Beneficiation, North-West University, Potchefstroom, South Africa
Interests: drug delivery; LbL nanocoating; surfactants; colloids; NMR
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Interpenetrating polymer networks (IPN) are easily manufactured and therefore have multiple applications. IPNs can also readily incorporate non-polymeric materials such as metal nanoparticles, drugs, sensors, nanoclays, dendrimers, etc. Numerous techniques can be employed to produce IPNs and include, amongst others, LbL nanocoating, spin coating, spray coating, or mixing.

An IPN construct is produced from at least two polymers that are combined through non-covalent intermolecular force interactions. However, the non-covalent combinations of IPNs do not exclude polymer reactivity. If the appropriate stimulus is applied to the IPN, it might form covalent bonds.

The applications of IPNs are virtually unlimited. Recently, solar panel technology has benefitted significantly from IPNs. Hydrogels are also a lucrative field of investigation for drug delivery, stimuli-responsive materials, the production of conductive materials, batteries, tissue engineering ,and biopolymer technology.

This Special Issue explores some of the latest developments in IPN science and its applications.

Dr. Daniel P. Otto
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.

Published Papers (2 papers)

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Research

18 pages, 3184 KiB  
Article
Research on the Fatigue Properties of Rejuvenated Asphalt Prepared by Waste Cooking Oil Pre-Desulfurized Crumb Tire Rubber
by Ruikun Dong, Zhiyu Zhang, Tao Zhou, Weitong Deng and Hong You
Polymers 2023, 15(3), 740; https://doi.org/10.3390/polym15030740 - 31 Jan 2023
Cited by 3 | Viewed by 1403
Abstract
Fatigue cracking has hitherto been a crucial constraint on the development of reclaimed asphalt pavements attributed to the performance of rejuvenated asphalt binder. Therefore, it is extremely significant to evaluate the fatigue performance of rejuvenated asphalt precisely and objectively and to improve the [...] Read more.
Fatigue cracking has hitherto been a crucial constraint on the development of reclaimed asphalt pavements attributed to the performance of rejuvenated asphalt binder. Therefore, it is extremely significant to evaluate the fatigue performance of rejuvenated asphalt precisely and objectively and to improve the fatigue life of rejuvenated asphalt binders. With preceding research in our group, this paper investigated the fatigue properties of waste rubber/oil (WRO) rejuvenated asphalt and universal rejuvenated asphalt by dynamic shear rheometer test (DSR). The applicability of common fatigue life evaluation indexes and the response to internal and external influences on the fatigue performance of rejuvenated asphalt were analyzed. It is demonstrated that Np20 corresponding to the mutagenesis of phase angle is physically significant and independent of the parameters including rejuvenator type, loading mode and loading level, which was recommended as the evaluation index for fatigue life of rejuvenated asphalt in this paper. The fatigue performance of both WRO and universal rejuvenated asphalt is found to decrease with loading frequency and loading level, but the fatigue life of WRO rejuvenated asphalt is comparatively superior to the latter, particularly at high loading frequencies and levels. Influenced by waste tire crumb rubber (WTCR), increasing the proportion of WTCR can improve the fatigue life of rejuvenated asphalt. When compared to other rejuvenated asphalt, RWRO@55 rejuvenated asphalt shows better fatigue performance and its fatigue life rebounds at high loading frequency. Consequently, the recommended mastic–oil ratio is 5:5. However, when the rheological recoverability compensation is considered, the fatigue lifetime evaluation of rejuvenated asphalt will be changed significantly, and therefore the fatigue performance evaluation of rejuvenated asphalt should consider the influence of rheological recoverability to develop a comprehensive evaluation system. Full article
(This article belongs to the Special Issue Interpenetrating Polymer Networks as Versatile Materials)
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18 pages, 9962 KiB  
Article
Semi-Interpenetrating Polymer Networks Based on Hydroxy-Ethyl Methacrylate and Poly(4-vinylpyridine)/Polybetaines, as Supports for Sorption and Release of Tetracycline
by Aurica Ionela Gugoasa, Stefania Racovita, Silvia Vasiliu and Marcel Popa
Polymers 2023, 15(3), 490; https://doi.org/10.3390/polym15030490 - 17 Jan 2023
Cited by 3 | Viewed by 1512
Abstract
Semi-interpenetrating polymer networks (semi-IPN) represent a type of polymeric material that has gained increasing amount of interest for their potential biomedical application. This study presents the synthesis, characterization and tetracycline loading/release capacities of semi-IPNs based on hydroxyethyl methacrylate (HEMA) and poly(4-vinylpyridine) (P4VP) or [...] Read more.
Semi-interpenetrating polymer networks (semi-IPN) represent a type of polymeric material that has gained increasing amount of interest for their potential biomedical application. This study presents the synthesis, characterization and tetracycline loading/release capacities of semi-IPNs based on hydroxyethyl methacrylate (HEMA) and poly(4-vinylpyridine) (P4VP) or poly (1-vinyl-4-(1-carboxymethyl) pyridinium betaine) (P4VPB-1) and poly (1-vinyl-4-(2-carboxyethyl) pyridinium betaine) (P4VPB-2). The optimization of the semi-IPNs synthesis was achieved by studying the influence of reaction parameters (chemical structure of the cross-linking agent, HEMA:crosslinker ratio, HEMA:linear polymers ratio and the type of solvent of the linear polymers) on the yield of obtaining semi-IPNs and swelling capacity of these systems. Fourier-transform infrared analysis and scanning electron microscopy highlighted the chemical structures and morphologies of the semi-IPNs. The higher swelling capacity was observed in the case of the PHEMA/P4VPB-2 network due to the increased hydrophilicity of P4VPB-2 compared with P4VP and P4VPB-1 polymers. In vitro release studies of tetracycline reveal that the release mechanism is represented by non-Fickian diffusion being controlled by both diffusion and swelling processes. The antimicrobial activity of semi-IPN–tetracycline systems was tested against E. coli and S. aureus, demonstrating that tetracycline is released from the semi-IPN and retains its bactericidal activity. An increased value of the inhibition zone diameter compared with that of tetracycline indicates the possibility that the semi-IPN containing P4VPB-2 also exhibits intrinsic antimicrobial activity due to the presence of the polybetaine in the network structure. Full article
(This article belongs to the Special Issue Interpenetrating Polymer Networks as Versatile Materials)
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