2025 - Sustainable Industrial Processing Summit
SIPS2025 Volume 4. Matyjaszewski Intl. Symp. / Polymers
| Editors: | F. Kongoli, R.C. Advincula, B.Z. Tang, S. Thomas |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2025 |
| Pages: | 208 pages |
| ISBN: | 978-1-998384-44-0 (CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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MATERIAL RECYCLING OF NETWORK POLYMERS BASED ON BIO-DERIVED JUGLONE NEW CROSSLINKERS
Takeo Suga1;1WASEDA UNIVERSITY, Tokyo, Japan;
Type of Paper: Regular
Id Paper: 300
Topic: 62
Abstract:
Polymers with dynamic covalent bonds have attracted much attention in recent years because of their self-healing, recyclability, and shape-memory properties, which can be achieved by repeated cleavage and regeneration of covalent bonds upon thermal or photo-stimulation. However, many reports have shown that dynamic covalent bond units, including Diels-Alder (DA) adducts, dissociate at around 100°C, and although they show repairability in the room temperature to medium temperature range, their application to practical materials is limited. Here we focus on anthracene-naphthoquinone (juglone) adduct, which shows bond recombination reactions in the high-temperature range compared to well-known furan- maleimide adduct, and synthesized the crosslinked polymers with anthracene-naphthoquinone moiety. The crosslinks of the network polymer showed high thermal stability ~150°C, but still reprocessable > 170°C. Crosslink density, Tg of matrix polymer, spacer length, etc were systematically investigated to understand reversible crosslinking behavior. Reversible crosslinking was evaluated by the temperature dependence of rheological behavior. Finally, we introduced DA unit for the crosslinked polyethylene, which is promising material for recyclable electric cables.