A5060021853- Epoxy Resin Curing Processes
- Synthesis and properties of polymers
- Polymer composites and self-healing
- Injection Molding Process and Properties
- Catalytic Processes in Materials Science
- Oxidative Organic Chemistry Reactions
- Photopolymerization techniques and applications
- Lignin and Wood Chemistry
- Ginkgo biloba and Cashew Applications
- Polymer Nanocomposites and Properties
- Catalysis and Oxidation Reactions
- Advanced Polymer Synthesis and Characterization
- biodegradable polymer synthesis and properties
- Flame retardant materials and properties
- Phosphorus compounds and reactions
- Design Education and Practice
- Dendrimers and Hyperbranched Polymers
- Advanced Battery Technologies Research
- Botanical Research and Applications
- Supercapacitor Materials and Fabrication
- Architecture and Computational Design
- Polysaccharides Composition and Applications
- Nanocomposite Films for Food Packaging
- Phytochemistry and biological activity of medicinal plants
- Silicone and Siloxane Chemistry
Luxembourg Institute of Science and Technology
2015-2024
This paper reports the development of first vitrimer based on polybenzoxazines containing disulfide bonds and cardanol.
Asymmetric di-benzoxazine monomers from naturally occurring phenolic compounds – cardanol and vanillin were synthesized to obtain a processable self-supported bio-thermoset with valuable properties. Such strategy constitutes an efficient versatile route for the elaboration of biobased thermoset wide range derived renewable resources.
This work describes new fully bio-based vitrimers prepared from isosorbide, a renewable sugar-based chemical. Isosorbide was reacted with 4-hydroxypropionic acid, paraformaldehyde, mono-ethanolamine, and/or furfurylamine via consecutive solvent-free Fischer esterification and Mannich-like ring-closure reactions. The two-step synthesis led to the formation of di-telechelic benzoxazine-terminated isosorbide monomer, containing ester bonds aliphatic hydroxyl furan groups. atom economy factor...
This work explores a new strategy, aiming for the synthesis of catalyst-free vitrimers by taking advantage abundant number tertiary amines covalently bound into polybenzoxazine network.
The meaningful concept of circular economy has prompted the scientific community to re-think design materials. In this work, lignin-based benzoxazines (LBZs) thermosets with tuneable properties were synthesized in agreement principles Green Chemistry, following a straightforward two-step synthetic route. reactivity soda lignin was enhanced by its esterification phloretic acid, naturally occurring phenolic acid. Thereafter, resulting structure enriched rings no ortho substituents, used...
The use of internal catalysts has emerged as a pivotal design principle to facilitate dynamic exchanges within covalent adaptable networks (CANs). Polybenzoxazines, specifically, have shown considerable potential in generating vitrimers through thermally induced transesterification reactions catalyzed internally by tertiary amines. This study aims investigate the chemical complexities benzoxazine vitrimers. To achieve this, model molecules using various phenolic acids and amino-alcohol...
Nonisocyanate polyurethanes (NIPUs) are broadly investigated as a potential replacement for conventional (PUs) to eliminate the use of toxic isocyanates and reduce occupational hazards. One most popular approaches NIPU synthesis is polyaddition cyclic bis(carbonate)s diamines form poly(hydroxyurethane)s (PHUs). However, such PHUs highly hydrophilic due presence two hydroxyl groups per repeat unit, resulting moisture absorption significantly degrades their thermomechanical performance...
Phloretic acid: a sustainable building block to promote the solvent-free elaboration of benzoxazine and its polymerization into fully bio-based thermosets.
Benzoxazines represent a class of thermoset resins known for their exceptional thermal, fire, and mechanical properties. These find wide applications in various industries, including composites electronic components. However, like conventional thermosets, benzoxazines have limitations terms end-of-life options, typically being landfilled or incinerated. To address this concern, researchers been exploring the incorporation dynamic bonds into structure polybenzoxazines to add functionalities...
This study aims to investigate the self-healing capability of a composite laminate composed novel bio-based benzoxazine vitrimers when subjected delamination-healing cycles. The is manufactured using compression resin transfer moulding. To quantify interlaminar shear strength (ILSS) and induced damage, three-point bending tests were conducted on short-beam specimens. healing interfacial damages was achieved by applying pressure (1 MPa) at 170 °C. Three experiments performed with different...
The proliferation of high-performance thin-film electronics depends on the development highly conductive solid-state polymeric materials. We report synthesis and properties investigation well-defined cationic anionic poly(ionic liquid) AB-C type block copolymers, where AB was formed by random copolymerization or monomers with poly(ethylene glycol) methyl ether methacrylate, while C obtained post-polymerization 2-phenylethyl methacrylate. resulting ionic copolymers were found to self-assemble...
The choice of ionic-liquid-like monomers (ILM) for single-ion conducting polyelectrolytes (SICPs) is crucial the performance all-solid-state lithium batteries. In current study, we propose a novel approach development SICPs via design and synthesis new ILM with long poly(ethylene oxide) spacer between methacrylic group (trifluoromethane)sulfonylimide anion. Its homopolymer shows an ionic conductivity that ∼5 orders magnitude higher (9.2 × 10–8 S cm–1 at 25 °C), in comparison previously...
This work reports the synthesis and successful use of novel benzoxazines as reinforcing resins in polyisoprene rubber compounds. For this purpose, three new dibenzoxazines containing one (4DTP-fa) or two heteroatoms sulfur (3DPDS-fa 4DPDS-fa) were synthesized following a Mannich condensation reaction. The structural features each benzoxazine precursor characterized by 1H 13C nuclear magnetic resonance (NMR), Fourier transform infrared (FTIR) Raman. precursors showed well suited reactivity...
Aerobic oxidation of (C<sub>4</sub>–C<sub>6</sub>) α,ω-diols in water produces the corresponding α,ω-diacids high 83–96% yields over a Au–Pt/ZrO<sub>2</sub> catalyst.
Photoageing of cardanol and its limitation by methoxylation the side chain to produce photocrosslinkable copolymers tunable reactivity.
This work explores the strategy of incorporating a highly substituted reactive flame retardant into benzoxazine moiety. For this purpose, DOPO-based received chain extension via reaction with ethylene carbonate. It was then reacted phloretic acid to obtain diphenol end-capped molecule, and further furfurylamine paraformaldehyde monomer Mannich-like ring closure reaction. four-step synthesis yielded partly bio-based halogen-free (DOPO-PA-fa). The successful proven NMR, IR MS analysis....