Results 71 to 80 of about 11,639 (211)

Better Material Properties and Faster Catalyzed Chemical Recycling for Poly(L‐Lactide) Using a Simple Commercial Glycerol Ethoxylate Additive

Chemistry – A European Journal, EarlyView.
Glycerol ethoxylate (GEO), a branched ethylene glycol derivative, both toughens commercial PLLA and accelerates its chemical recycling to L‐lactide. The lead sample, containing 10 wt.% GEO, shows 9x higher elongation at break and 6x higher tensile toughness than pure PLLA. The GEO–PLLA samples are efficiently chemically recycled to L‐lactide, even when
Madeleine L. Smith, Thomas M. McGuire, Kam C. Poon, Alexander R. Craze, Charlotte K. Williams   +4 more
wiley   +1 more source

Nonlinear Active Site Dynamic Behavior Over In Situ Generated Working Zeolites

Chemie Ingenieur Technik, EarlyView.
The methoxymethyl mechanism over α, β, and γ site ensembles and the dynamic site‐interconversion mechanism reduce the induction period of propylene formation. The methoxymethyl mechanism acts on site ensemble α generating surface methoxy species (SMS), which, through the dynamic site‐interconversion mechanism, lead to SMS on site ensembles β and γ that
Toyin Omojola
wiley   +1 more source

Mechano-chemical dynamics of active gels: interplay between spatial bistability and volume variations

Journal of the Mechanical Behavior of Materials, 2011
The mechano-chemical dynamics of a spherical bead of gel immersed in an autocatalytic bistable chemical reaction are examined. The spheres exhibit autonomous volume self-oscillation dynamics.
Villain Sébastien, Borckmans Pierre, Métens Stéphane   +2 more
doaj   +1 more source

3D Polymeric Nanonetworks: From Self‐Assembly to Advanced Fabrication

Macromolecular Materials and Engineering, EarlyView.
This review provides the first systematic cross‐method comparison of fabrication techniques for 3D polymeric nanonetworks. It evaluates five key strategies—block copolymer self‐assembly, hyper‐crosslinking, template‐assisted methods, 3D printing, and nanolithography—across critical metrics including resolution, throughput, scalability, and material ...
Carlos G. Cobos, Xiang Yan, Marisol Martín‐González   +2 more
wiley   +1 more source

Strain Development During Cure of Partially Pre‐Cured Thermosetting Composites Measured With Distributed Fiber Optic Sensors

Polymer Composites, EarlyView.
Schematic representation of the beneficial effect of ply pre‐curing on temperature overshoot, internal strain and warpage during cure of thin and thick thermosetting composites. ABSTRACT Detection of manufacturing‐induced defects in thermosetting composites is crucial to guarantee part quality, safety, and improve manufacturing efficiency.
Francesco Taddei, Giacomo Struzziero, Valentin Ott, Véronique Michaud   +3 more
wiley   +1 more source

Sustainable Photoinduced Frontal Polymerization of Acrylic Resins Reinforced by Biofillers

Polymer Composites, EarlyView.
Top left: Chemical structures of the monomers and initiators used. Top right: Effect of monomer ratios on frontal velocity. Bottom left: Schematic overview of the PIFP process as the reaction front moves within the mold. Bottom right: Application of PIFP for wood repair.
Huseyin Mirac Dizman, Alessandra Vitale, Roberta Bongiovanni   +2 more
wiley   +1 more source

Computational role of the heat transfer phenomenon in the reactive dynamics of catalytic nanolubricant flow past a horizontal microchannel

Applied Rheology
A numerical simulation is conducted to examine the impact of heat source on reactive dynamics of catalytic nanolubricant flow through a horizontal microchannel with convective boundary conditions.
Roja Ajjanna, Khan Umair, Venkadeshwaran K., Madhukesh Javali Kotresh, Kumar Raman, Ishak Anuar, Hussain Syed Modassir   +6 more
doaj   +1 more source

A Study on Preventing Thermal Runaway of Contaminated Ammonium Nitrate Prill in Bulk Storage

Propellants, Explosives, Pyrotechnics, EarlyView.
Schematic illustration of a contaminated region of ammonium nitrate prill undergoing exothermic decomposition, producing gases containing NOx. The interstitial flow of these heated gases rapidly raises the temperature of ammonium nitrate along the flow path.
Pramith Priyananda, Alex M. Djerdjev, Nathan Paris, Brian S. Hawkett   +3 more
wiley   +1 more source

Copper-catalysed autocatalytic reactions

, 2021
The work contained within this thesis describes the development and study of self-reproducing systems, created from simple chemical building blocks, that exhibit emergent, life-like properties. Several different autocatalytic systems that are driven by copper-catalysed azide-alkyne cycloaddition (CuAAC) reactions are reported.
openaire   +1 more source

Structure and Mechanism of PhdC, a Prenylated‐Flavin Maturase

Proteins: Structure, Function, and Bioinformatics, EarlyView.
ABSTRACT Prenylated flavin mononucleotide (prFMN) is a modified flavin cofactor required by the UbiD family of (de)carboxylase enzymes. While the reduced prFMNH2 form is produced by the flavin prenyltransferase UbiX, the corresponding two‐electron oxidized prFMNiminium form is required to support UbiD catalysis. Thus, oxidative maturation of prFMNH2 is
Dominic R. Whittall, Henry G. Box, Karl A. P. Payne, Stephen A. Marshall, David Leys   +4 more
wiley   +1 more source