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Hypercrosslinked Polymers: Preparation, Characterization and Applications

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

Deadline for manuscript submissions: closed (30 October 2024) | Viewed by 1300

Special Issue Editors


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Guest Editor
Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea
Interests: hybrid aerogels; porous polymers; self-cleaning coatings; sol–gel process; thin films; functional materials; superhydrophobic coatings; photocatalysis; low-k dielectrics
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea
Interests: hybrid aerogels; porous polymers; self-cleaning coatings; sol–gel process; thin films; functional materials; superhydrophobic coatings; photocatalysis; low-k dielectrics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue on polymer-based aerogels is devoted to disseminating high-quality original research articles or comprehensive reviews on cutting-edge developments in this interdisciplinary field. Over the past years, polymer science and technology has been driven by scientific breakthroughs in thermal insulation applications. Many polymeric aerogel materials have been developed for mechanically strong, flexible, thermal insulation applications, and new advances are being made to use different applications, promoting high-temperature thermal stability. The increasing interest in polymeric materials may be due to their synthesis, which is often relatively low-cost and easy, and the possibility of obtaining a wide range of properties and functionalities for aerospace applications. Thus, an in-depth understanding of physical, biological, and/or digital cues is highly relevant to the performance and development of any polymer-based aerogels. Both original contributions and comprehensive reviews are welcome.

Dr. Varsha D. Phadtare
Dr. Vinayak G. Parale
Guest Editors

Manuscript Submission Information

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Keywords

  • polymer aerogels
  • organic-inorganic aerogels
  • functional polymeric aerogels
  • flexible and mechanically strong polymer scaffolds
  • biodegradable polymer aerogels
  • recyclable self-healing aerogels
  • synthesis of porous polymers
  • high-temperature stable polymers

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Published Papers (1 paper)

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14 pages, 3738 KiB  
Article
Improving the Elastic Response of Tanned Leather by Treatment with a Carboxylic Elastomer
by Daniele Marinai, Cristiana Borchi, Lorenzo Marinai, Gustavo Adrián Defeo, Antonella Manariti, Pierpaolo Minei, Valter Castelvetro and Francesco Ciardelli
Polymers 2024, 16(23), 3411; https://doi.org/10.3390/polym16233411 - 4 Dec 2024
Viewed by 959
Abstract
The elastic response of chromium-tanned leather was successfully improved by treatment with XSBR, a carboxylated styrene-butadiene copolymer. The carboxylic groups pending from a styrene-butadiene rubber (SBR) backbone were found to promote penetration of the aqueous polymer dispersion into the fibrous tanned leather and [...] Read more.
The elastic response of chromium-tanned leather was successfully improved by treatment with XSBR, a carboxylated styrene-butadiene copolymer. The carboxylic groups pending from a styrene-butadiene rubber (SBR) backbone were found to promote penetration of the aqueous polymer dispersion into the fibrous tanned leather and participated in pH-reversible physical crosslinking by H-bonding. The different penetrations of XSBR or SBR were investigated using a micro-FTIR cross-sectional analysis from the grain (outer) to the flesh (inner) side of 18 wt% elastomer-treated samples, based on the shaved leather weight. In particular, the profile of the diagnostic out-of-plane =C-H bending of butadiene and styrene units was consistent with a more effective penetration of XSBR. The leather with XSBR showed a comparatively lower elastic modulus of 10–15% and roughly a 10% increase in elongation at the break, indicating better flexibility and shape recovery. Also, the leather was characterized by a 15% higher burst strength. These results suggest the better swelling of the ionomeric XSBR in the initial stage of retanning performed at a pH higher than the isoelectric point of the leather when both the tanned leather and the XSBR ionomer had a negative surface charge. The high pH favored the penetration of XSBR due to a poor attractive interaction with the tanned fibrous leather network. Subsequent processing in an acid bath caused further physical crosslinking through hydrogen bonding between XSBR and the leather. Full article
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