Results 31 to 40 of about 23,225 (270)
Pd-Catalyzed Cycloaddition of Bicyclic Aziridine with Isocyanates
Medical Sciences Forum, 2022 Nitrogen-containing heterocycles can have several applications in the pharmaceutical industry since they contain a wide spectrum of biological activities. Imidazolidinones have shown activity against leukemia, lung cancer, and metabolic disorders.
Mariana Crespo Monteiro +2 more
doaj +1 more source
Statistical experimental design screening strategies for free-monomeric isocyanates determination by UPLC in materials used in cork stoppers manufacturing [PDF]
, 2017 A statistical experimental design was used to screen variables of the analytical procedure to quantify free monomeric isocyanates presented in polyurethane based pre-polymers in trace amounts.
André, Catarina +4 more
core +2 more sources
Angewandte Chemie, EarlyView.Cross‐coupling/homologation sequence between a stable three‐membered‐ring carbene and isocyanides enables facile and rapid access to novel methyleneketenimines and the first bis(methyleneketenimine). Reactivity studies gave rise to the first methyleneketenimine‐transition metal complexes, unique multimodal reactivity ranging from CO2, isocyanate ...
Taichi Koike +3 more
wiley +2 more sources
Catalysts for polyimide foams from aromatic isocyanates and aromatic dianhydrides [PDF]
, 1979 Polyimide foam products having greatly improved burn-through and flame-spread resistance are prepared by the reaction of aromatic polyisocyanates with aromatic dianhydrides in the presence of metallic salts of octoic acid. The salts, for example stannous
Estrella, C. A. +2 more
core +1 more source
Dynamic Bonds Enable Repair and Reprocessing of Glycol‐Modified PET
Advanced Functional Materials, EarlyView.Dynamic hindered urea bonds enable rapid healing in glycol‐modified PET‐based polyurethanes. Tuning the hindered‐amine content allows these polymers to balance mechanical integrity with fast repair, achieving complete scratch disappearance in 30 s at 130°C.
Chaninya Mak‐iad +3 more
wiley +1 more source
Angewandte Chemie, EarlyView.Anionic α‐silyl alkyl is one of the most used organometallic building blocks and funtional groups. Traditionally, the C─Si bond in these complexes is considered as inert. In this work, we report a series of reactions between mononuclear organo‐lithium and ‐sodium complexes with CO, CO2, or heteroallenes.
Xiao Yang +8 more
wiley +2 more sources
Main Group Metal Chemistry, 2018 Substances like 3-aminopropyltriethoxysilane are often used as adhesive promoters in various formulations for coatings or to adjust the properties of siloxanes and other polymers.
Herbig Marcus +3 more
doaj +1 more source
Molecules, 2019 Nanocellulose has been subjected to a wide range of chemical modifications towards increasing its potential in certain fields of interest. These modifications either modulated the chemistry of the nanocellulose itself or introduced certain functional ...
Hatem Abushammala, Jia Mao
doaj +1 more source
Fractionation of CIMV wheat straw lignin as an approach for promoting it interaction with isocyanates and characteristic of products obtained [PDF]
, 2012 The reactivity of CIMV lignin fractions with MDI has been investigated in extra dry dioxane (DOX) in argon atmosphere at 25 degrees of Celsius, using FTIR spectroscopy (absorbance band at 2273 cm^-1) for monitoring the NCO group disappearance during ...
Arshanitsa, Alexandr +4 more
core
Dynamic covalent chemistry in polymer networks : a mechanistic perspective [PDF]
, 2019 The incorporation of dynamic covalent linkages within and between polymer chains brings new properties to classical thermosetting polymer formulations, in particular in terms of thermal responses, processing options and intrinsic recycling abilities ...
Du Prez, Filip +2 more
core +1 more source