Results 41 to 50 of about 126,507 (309)

Synthesis and Structural Characterization of Amidine, Amide, Urea and Isocyanate Derivatives of the Amino-closo-dodecaborate Anion [B₁₂H₁₁NH₃]⁻

Molecules, 2018
The synthesis and structural characterization of new derivatives of [B12H12]2− is of fundamental interest and is expected to allow for extended applications.
Yuanbin Zhang, Yuji Sun, Tao Wang, Jiyong Liu, Bernhard Spingler, Simon Duttwyler   +5 more
doaj   +1 more source

Effects of Isocyanate Structure on the Properties of Polyurethane: Synthesis, Performance, and Self-Healing Characteristics

Polymers
Polyurethane (PU) plays a critical role in elastomers, adhesives, and self-healing materials. We selected the most commonly used aromatic isocyanates, 4,4′-methylene diphenyl diisocyanate (MDI) and tolylene-2,4-diisocyanate (TDI), and the most commonly ...
Hai-Rui Wang, Lan Cao, Xiaolei Wang, Xiu-Rui Lang, Wenwen Cong, Long Han, Hong-Yu Zhang, Huibin Zhou, Ju-Jie Sun, Cheng-Zhong Zong   +9 more
semanticscholar   +1 more source

Hydraulicity in Organic Polymers Enabled by Hydrophobization Upon Water‐Triggered Curing of Hydrophilic Chains

Angewandte Chemie, EarlyView.
Cement‐mimetic hydraulicity is realized in an organic polymer through a counterintuitive reaction in which a hydrophilic linear polymer reacts with water to undergo hydrophobization during curing via silatrane sol–gel chemistry. This polarity‐inverting curing process turns a water‐plasticized putty into a water‐tolerant rigid material, enabling ...
Rei Tokumitsu, Shio Uebo, Akira Takahashi, Hideyuki Otsuka   +3 more
wiley   +2 more sources

On the Versatility of Urethane/Urea Bonds: Reversibility, Blocked Isocyanate, and Non-isocyanate Polyurethane

, 2016
On the Versatility of Urethane/Urea Bonds: Reversibility, Blocked Isocyanate, and Non-isocyanate ...
Jean-Pierre Pascault (2005108), Bernard Boutevin (2005105), Etienne Delebecq (2005111), François Ganachaud (2005114)   +3 more
core   +1 more source

Demonstration of a Two‐Electron Pathway in Piezoelectric Mechanochemistry: Synthesis and Mechanical Adaptation of Polythiourethane

Angewandte Chemie, EarlyView.
A mechano‐triggered polythiourethane (PTU) synthesis mediated by a two‐electron pathway. The polymerization proceeds efficiently (<1 h) under focused ultrasound, achieving >90% conversion without any conventional base catalyst. The approach demonstrates broad compatibility with various thiol/isocyanate monomer combinations, highlighting its synthetic ...
Yixiao Dong, Farsa Ram, John Brownridge, Thalia Haines, Pin‐Ruei Huang, María José Román‐Vasquez, Jun Wang, Aaron P. Esser‐Kahn   +7 more
wiley   +2 more sources

Synthesis of 2-Azetidinones via Cycloaddition Approaches: An Update

Reactions
The present review is a comprehensive update of the synthesis of monocyclic β-lactams via cycloaddition reactions. According to the IUPAC definition of cycloaddition, both elementary and stepwise processes (formal cycloadditions) have been considered ...
Franca Maria Cordero, Donatella Giomi, Fabrizio Machetti   +2 more
doaj   +1 more source

Bio-based light-healing isocyanate-free polyurethanes derived from carbonated soybean oil and coumarin

Green Chemistry Letters and Reviews, 2023
In response to environmental concerns and restrictions on isocyanate-based materials, researchers and the coatings industry are focused on developing eco-friendly isocyanate-free polyurethanes.
Karteek Boga, Nikhil Rambharosh Dhore, Aruna Palanisamy, Antonio F. Patti, John C. Warner, George P. Simon, Kei Saito   +6 more
doaj   +1 more source

Reactions and synthesis of isocyanate on platinum(111).

, 2010
Reactions and synthesis of isocyanate on platinum(111)
James E. Jones (2401447)
core   +5 more sources

Control of Helix Screw‐Sense Preference in Dynamic Foldamers of meso Symmetry Built From Chiral Monomeric Units

Angewandte Chemie, EarlyView.
Sequence‐diverse meso and “near‐meso” oligourea foldamers are reported and exhibit stimulus‐responsive helix screw‐sense control governed by terminal‐group desymmetrization and sequence‐encoded helix stability. ABSTRACT Meso oligoureas are dynamic hydrogen‐bonded foldamers capable of reversible helix polarity inversion but have so far been limited to ...
Naveen Gupta, Mégane Bornerie, Bo Li, Antoine Hacihasanoglu, Orlando Villegas Bello, Stéphanie Antunes, Estelle Morvan, Jean‐Marc Sotiropoulos, Philippe Carbonnière, Morgane Pasco, Brice Kauffmann, Céline Douat, Sung Hyun Yoo, Gilles Guichard   +13 more
wiley   +2 more sources

Identification of Isocyanate Number on IPDI and TDI Due to Storage Period and Their Impact on Composite Solid Propellant

Reaktor
Isocyanate compounds serve as a curing agent in the production of composite propellants, playing a crucial role in determining their characteristics. Due to its high reactivity with moisture, it is essential to determine the isocyanate number of stored ...
Anita Pinalia, Ratnawati Ratnawati
doaj   +1 more source