Results 91 to 100 of about 57,276 (400)
Beilstein Journal of Organic Chemistry, 2015 The two isomeric bis(isocyanates) 4,12- and 4,16-di-isocyanato[2.2]paracyclophane, 16 and 28, have been prepared from their corresponding diacids by simple routes.
Henning Hopf +2 more
doaj +1 more source
Reactions of 3-amino-1,2,4-triazine with coupling reagents and electrophiles
Heterocyclic Communications, 2022 Analogs of a new heterocyclic system were obtained from the reactions of 3-amino-1,2,4-triazine with coupling reagents such as boronic acids, and terminal alkynes in the presence of a palladium catalyst.
Bvumbi Mpelegeng Victoria +3 more
doaj +1 more source
Interstellar Detection of Methyl Isocyanate CH$_3$NCO in Sgr B2(N): A Link from Molecular Clouds to Comets [PDF]
, 2015 A new interstellar molecule, CH$_3$NCO (methyl isocyanate), has been detected using the 12 m telescope of the Arizona Radio Observatory (ARO). CH$_3$NCO was identified in spectra covering 48 GHz (68-116 GHz) in the 3 mm segment of a broadband survey of Sgr B2(N).
arxiv +1 more source
The role of isocyanates in fire toxicity
, 2016 Isocyanates are a group of low molecular weight, highly reactive compounds with a functional isocyanate group. The main human exposure route is via inhalation of airborne isocyanates, although dermal exposure has also been reported.
Linda Bengtström, M. Salden, A. Stec
semanticscholar +1 more source
The Latest Advances in Mechanically Robust Self‐Healing Polyurea Based on Dynamic Chemistry
Advanced Science, EarlyView.Solving the contradiction between strength, toughness, and self‐healing properties is extremely important to realize the breakthrough of polyurea applications. This review summarizes and discusses common strategies for the preparation of high‐performance and self‐healing polyurea materials based on dynamic chemistry, providing molecular‐level insights ...
Yujia Hao, Guangming Zhu
wiley +1 more source
Investigations of catalysis of urethane formation using organotin dicarboxylate
Heliyon, 2020 The reaction mechanism of the urethane formation for both aliphatic and aromatic isocyanates in the presence of organotin dicarboxylate as a catalyst is investigated theoretically and experimentally.
Ransi Devendra +2 more
doaj
Advanced Science, EarlyView.This study employs the Tishchenko coupling reaction to obtain bio‐based bisphenols containing degradable ester bonds with 100% atom utilization. Based on these bio‐based bisphenols, a fully bio‐based polyurethane Covalent Adaptable Networks are constructed, while simultaneously endowing the material with closed‐loop recyclability, degradability, and ...
Jiewen Wang +7 more
wiley +1 more source
Macromolecular Bioscience, Volume 22, Issue 12, December 2022., 2022 To accelerate biodegradation of stable poly(ethylene glycol)‐based hydrogels cross‐linked via the rapid inverse electron demand Diels–Alder reaction between norbornene and tetrazine groups, 3,6‐epoxy‐1,2,3,6‐tetrahydrophthalimide, phenyl carbamate, carbonate ester, and phenyl carbonate ester are synthesized into the hydrogel backbone.
Christian E. Ziegler +3 more
wiley +1 more source
The wheat straw lignin as renewable polyol for polyurethanes elastomers [PDF]
, 2012 The novel wheat straw) produced on CIMV pilot plant (France) was sequential extracted with organic solvents of different polarity (dichloromethane, methanol and dichloromethane/methanol mixture.
Arshanitsa, Alexandr +3 more
core
Advanced Science, EarlyView.⁻Inspired by the “brick wall” structure of pearl layer, FLICE‐110% liquid‐free ionic conductive elastomer had high mechanical strength (5.46 MPa), excellent ionic conductivity (3.29 × 10−4 S cm−1) and resilience. It can be used in smart music boxes, airplane wings and control manipulators.
Zequan Li +13 more
wiley +1 more source