Polímeros, 1998 Este estudo descreve uma série de reações envolvendo os grupos isocianatos (NCO) e os grupos hidroxílicos do acetato de celulose com grau de substituição (DS) igual a 2,4.
Vagner R. Botaro, Alessandro Gandini
doaj +1 more source
Methyl isocyanate CH3NCO: An important missing organic in current astrochemical networks [PDF]
, 2017 Methyl isocyanate (CH3NCO) is one of the important complex organic molecules detected on the comet 67P/Churyumov-Gerasimenko by Rosetta's Philae lander. It was also detected in hot cores around high-mass protostars along with a recent detection in the solar-type protostar IRAS 16293-2422.
arxiv +1 more source
Kinetic and chemorheological modeling of thermosetting polyurethanes obtained from an epoxidized soybean oil polyol crosslinked with glycerin [PDF]
arXiv, 2022 Thermosetting polyurethanes were obtained using an aromatic isocyanate and a hydrophobic polyol formulation obtained from epoxidized soybean oil (ESO) crosslinked with glycerin. A systematic DSC analysis of the effect of catalyst type, crosslinker concentration, isocyanate index and ESO crystallization on the cure kinetics was conducted.
arxiv
Identification of Methyl Isocyanate and Other Complex Organic Molecules in a Hot Molecular Core, G31.41+0.31 [PDF]
, 2020 G31.41+0.31 is a well known chemically rich hot molecular core (HMC). Using Band 3 observations of Atacama Large Millimeter Array (ALMA), we have analyzed the chemical and physical properties of the source. We have identified methyl isocyanate (CH3NCO), a precursor of prebiotic molecules, towards the source.
arxiv +1 more source
Isocyanate emissions from pyrolysis of mattresses containing polyurethane foam [PDF]
, 2017 This study examined the emissions of powerful asthmatic agents called isocyanates from small-scale pyrolysis experiments of two common foams employed in mattress production such as flexible polyurethane foam (FPUF) and viscoelastic memory foam (VMF).
Conesa, Juan A. +4 more
core +2 more sources
Nickel/Photoredox-Catalyzed Amidation via Alkylsilicates and Isocyanates.
ACS Catalysis, 2017 A nickel/photoredox, dual-catalyzed amidation reaction between alkylsilicate reagents and alkyl/aryl isocyanates is reported. In contrast to the previously reported reductive coupling process, this protocol is characterized by mild reaction conditions ...
Shuai Zheng, D. Primer, G. Molander
semanticscholar +1 more source
Re-exploring Molecular Complexity with ALMA (ReMoCA): Interstellar detection of urea [PDF]
A&A 628, A10 (2019), 2019 Urea, NH2C(O)NH2, is a molecule of great importance in organic chemistry and biology. Two searches for urea in the interstellar medium were reported in the past, but neither were conclusive. We want to take advantage of the increased sensitivity and angular resolution provided by ALMA to search for urea toward the hot cores embedded in the high-mass ...
arxiv +1 more source
Cell Membrane Vesicle Camouflaged Artificial Cells
Advanced Functional Materials, EarlyView.Artificial cells camouflaged with a cell membrane vesicle coating are able to assemble into synthetic aggregates that exhibit rudimentary communication capabilities. Additionally, when these artificial cells are equipped with antioxidant capabilities, they are able to protect the intracellular homeostasis in HepG2 cells present in semi‐synthetic ...
Paula De Dios Andres +11 more
wiley +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
Chemoselective Schwartz Reagent Mediated Reduction of Isocyanates to Formamides.
Organic Letters, 2016 Addition of the in situ generated Schwartz reagent to widely available isocyanates constitutes a chemoselective, high-yielding, and versatile approach to the synthesis of variously functionalized formamides.
Vittorio Pace +3 more
semanticscholar +1 more source