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Redesigned Nylon 6 Variants with Enhanced Recyclability, Ductility, and Transparency.
- Source :
- Angewandte Chemie International Edition; 4/22/2024, Vol. 63 Issue 17, p1-6, 6p
- Publication Year :
- 2024
-
Abstract
- Geminal (gem−) disubstitution in heterocyclic monomers is an effective strategy to enhance polymer chemical recyclability by lowering their ceiling temperatures. However, the effects of specific substitution patterns on the monomer's reactivity and the resulting polymer's properties are largely unexplored. Here we show that, by systematically installing gem‐dimethyl groups onto ϵ‐caprolactam (monomer of nylon 6) from the α to ϵ positions, both the redesigned lactam monomer's reactivity and the resulting gem‐nylon 6's properties are highly sensitive to the substitution position, with the monomers ranging from non‐polymerizable to polymerizable and the gem‐nylon properties ranging from inferior to far superior to the parent nylon 6. Remarkably, the nylon 6 with the gem‐dimethyls substituted at the γ position is amorphous and optically transparent, with a higher Tg (by 30 °C), yield stress (by 1.5 MPa), ductility (by 3×), and lower depolymerization temperature (by 60 °C) than conventional nylon 6. [ABSTRACT FROM AUTHOR]
- Subjects :
- WASTE recycling
NYLON
DUCTILITY
YIELD stress
CHEMICAL recycling
LACTAMS
Subjects
Details
- Language :
- English
- ISSN :
- 14337851
- Volume :
- 63
- Issue :
- 17
- Database :
- Complementary Index
- Journal :
- Angewandte Chemie International Edition
- Publication Type :
- Academic Journal
- Accession number :
- 176607716
- Full Text :
- https://doi.org/10.1002/anie.202320214