Results 111 to 120 of about 121,502 (357)

Introduction of functional groups on polyethylene surfaces by a carbon dioxide plasma treatment [PDF]

, 1995
Poly(ethylene) (PE) films were treated with a carbon dioxide (CO2) plasma to study the formation of oxygen-containing functional groups at the surface. Modified and nonmodified films were characterized by X-ray photoelectron spectroscopy (XPS) and water ...
Feijen, Jan, Gerritsen, Hermina F.C., Hoffman, Allan S., Terlingen, Johannes G.A.   +3 more
core   +2 more sources

Dielectric Barrier Discharge Electrothermal Heating and Additive Manufacturing of Thermoset Parts

Advanced Materials Technologies, EarlyView.
3D printing of thermosets is difficult due to the low yield stress of most uncured resins. However, by locally heating resin using a non‐equilibrium plasma, layers can be partially cured and printing enabled. Plasma application to a liquid epoxy/carbon nanotube composite is observed to cause rapid surface heating and oxidation of the cured layers ...
Ethan M. Harkin, Sayyam Deshpande, Smita Shivraj Dasari, Micah J. Green   +3 more
wiley   +1 more source

Reactive precursor particles as synthetic platform for the generation of functional nanoparticles, nanogels, and microgels [PDF]

, 2019
Precise control of the chemical functionality of polymer nanoparticles is a key requirement in tailoring their (dynamic) colloidal properties toward advanced applications.
Gruber, Alexandra, Klinger, Daniel, Navarro, Lucila   +2 more
core   +1 more source

Dual‐Wavelength Vat Photopolymerization With Dissolvable, Recyclable Support Structures

Advanced Materials Technologies, EarlyView.
Selective solubility vat photopolymerization (SSVP) uses a single resin to produce dissolvable thermoplastics and insoluble thermosets in a single 3D print. Wavelength‐selective curing and thermal post‐processing provide 3D spatial control over dissolution kinetics, enabling dissolvable support structures and programmable dissolution profiles.
Nicholas S. Diaco, Carl J. Thrasher, Max M. Hughes, Kevin A. Zhou, Michael N. Durso, Saechow Yap, Robert J. Macfarlane, A. John Hart   +7 more
wiley   +1 more source

Chemo-Enzymatic Synthesis of Chiral Epoxides Ethyl and Methyl (S)-3-(Oxiran-2-yl)propanoates from Renewable Levoglucosenone: An Access to Enantiopure (S)-Dairy Lactone

Molecules, 2016
Chiral epoxides—such as ethyl and methyl (S)-3-(oxiran-2-yl)propanoates ((S)-1a/1b)—are valuable precursors in many chemical syntheses. Until recently, these compounds were synthesized from glutamic acid in four steps (deamination, reduction, tosylation ...
Aurélien A. M. Peru, Amandine L. Flourat, Christian Gunawan, Warwick Raverty, Martyn Jevric, Ben W. Greatrex, Florent Allais   +6 more
doaj   +1 more source

Total synthesis of aurofusarin: studies on the atropisomeric stability of bis-naphthoquinones [PDF]

, 2018
An efficient annulation involving pyrone addition to a quinone and Dieckmann condensation was developed for rapid assembly of a γ-naphthopyrone monomeric precursor to the bis-naphthoquinone natural product aurofusarin.
Allen, Ashley, Bao, Berkessel, Birchall, Bringmann, Bringmann, Chen, Corey, Crimmins, Dao, Donner, Dwyer, Flegel, Frandsen, Gao, Gray, Helder, Jew, Konkol, Lee, Leeper, Liau, Masson, Morishita, Natori, Romaine, Shi, Shibata, Shibata, Shibata, Shirakawa, Shirakawa, Sperry, Sun, Takeya, Takizawa, Varun, Wu, Yeung, Zeeck, Zhang, Ōki   +42 more
core   +1 more source

Dearomative, Intramolecular Bromoetherification of Carbohydrate‐derived Glycosyl Furans: Access to Enantiopure 6‐Bromo‐Furo[3,2‐b]furans

Advanced Synthesis &Catalysis, EarlyView.
Abstract Glycosyl furans represent versatile chiral platform molecules that can be readily accessed via the Garcia Gonzalez reaction. Herein, we report a dearomative, intramolecular bromoetherification of carbohydrate‐derived glycosyl furans to generate enantiopure 6‐bromo‐furo[3,2‐b]furans in up to 69% yield. The method employs N‐Br aromatic amides as
William J. Berkey, Lindsey R. C. Bryson, Russell Kirkland, Kaitlyn S. Otte, Christopher W. Jones, Stefan France   +5 more
wiley   +1 more source

Green tea polyphenol-reduced graphene oxide: derivatisation, reduction efficiency, reduction mechanism and cytotoxicity [PDF]

, 2014
This paper reports on the derivatisation, reduction efficiency, reduction mechanism and cytotoxicity of green tea polyphenol-reduced graphene oxide (GTP-RGO).
Abdullah, M. F., Zakaria, R., Zein, S. H. S.   +2 more
core   +1 more source

Lignin modification by epoxidation

BioResources, 2008
The chemical modification of lignin through hydroxymethylation and epoxidation is a way to develop new application fields and improvement of lignin performances. In this paper the influence of reaction conditions was studied using different samples of unmodified and modified lignins from annual plants (Wheat straw and Sarkanda grass).
Theodor Malutan, Raluca Nicu, Valentin I. Popa   +2 more
openaire   +3 more sources

C–H Homocoupling of Arenes via Pd/S,O‐Ligand Catalysis

Advanced Synthesis &Catalysis, EarlyView.
An efficient C‐H homocoupling of arenes via Pd/S,O‐ligand catalytic system is reported. This method can be applied to a series of arenes using O2 as oxidant under room temperature and is also applicable for late‐stage homocoupling of pharmaceutical derivatives.
Ke‐Zuan Deng, Sam Pikavet, Paola Riente, María Ángeles Fernández‐Ibáñez   +3 more
wiley   +1 more source