Results 21 to 30 of about 2,286 (170)

Hydrochloric acid immobilized on nano‐titanium dioxide: a novel and efficient nanocatalyst for the synthesis of tetrahydrobenzo[b]pyrans [PDF]

شیمی کاربردی روز, 2017
Hydrochloric acid was immobilized onto the surface of amine functionalized nano‐titania. For this purpose, 2,4‐toluene diisocyanate (TDI) as a bi‐functional covalent linker was grafted onto a nano‐titania and next, the unreacted isocyanate groups were ...
Taiebeh Shamsi, Ali Amoozadeh, Elham Tabrizian   +2 more
doaj   +1 more source

Novel bio-based epoxy-polyurethane materials from modified vegetable oils – synthesis and characterization

eXPRESS Polymer Letters, 2017
Presented research shows the results of a study on mechanical properties of materials obtained in the course of innovatory application of epoxidized vegetable oil in the synthesis of new bio-based epoxy resins, crosslinked with curing agents which are ...
A. Sienkiewicz, P. Czub
doaj   +1 more source

Experiments and simulations on interactions between 2,3-bis(hydroxymethyl)-2,3-dinitro-1,4-butanediol tetranitrate (DNTN) with some energetic components and inert materials

FirePhysChem, 2021
In order to survey the application prospects of 2,3-bis(hydroxymethyl)-2,3-dinitro-1,4-butanediol tetranitrate (DNTN, NEST-1, SMX) in high - energy solid rocket propellants and explosives, the interactionsbetween DNTN with some energetic components and ...
Weiqiang Pang, Ke Wang, Luigi T. DeLuca, Djalal Trache, Xuezhong Fan, Junqiang Li, Huan Li   +6 more
doaj   +1 more source

Elimination kinetics of diisocyanates after specific inhalative challenges in humans: mass spectrometry analysis, as a basis for biomonitoring strategies

Journal of Occupational Medicine and Toxicology, 2011
Background Isocyanates are some of the leading occupational causes of respiratory disorders, predominantly asthma. Adequate exposure monitoring may recognize risk factors and help to prevent the onset or aggravation of these aliments.
Lemiere Catherine, Merget Rolf, Nowak Dennis, Budnik Lygia T, Baur Xaver   +4 more
doaj   +1 more source

Segmented linear shape memory polyurethanes with thermoreversible Diels-Alder coupling: Effects of polycaprolactone molecular weight and diisocyanate type

eXPRESS Polymer Letters, 2016
Segmented linear polyurethanes (PUs) containing Diels-Alder (DA) adduct were synthesized in toluene solution from poly(ε-caprolactone) (PCL, Mn = 10, 25 and 50 kg/mol), diisocyanate (methylene diphenyl diisocyanate (MDI), 2,4-toluene diisocyanate (TDI ...
Cs. Lakatos, K. Czifrak, R. Papp, J. Karger-Kocsis, M. Zsuga, S. Keki   +5 more
doaj   +1 more source

Application of Microstructured Reactor Technology for the Photochemical Chlorination of Alkylaromatics

CHIMIA, 2002
The advantageous application of a falling-film microreactor for a photochemical gas/liquid reaction was demonstrated by the selective photochlorination of toluene-2,4-diisocyanate (TDI). In the microstructured reactor the selectivity to the side-
Heike Ehrich, David Linke, Konrad Morgenschweis, Manfred Baerns, Klaus Jähnisch   +4 more
doaj   +1 more source

Hexamethylene diisocyanate, 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, isophorone diisocyanate and 4,4′-methylene diphenyl diisocyanate - Determination of hexamethylenediamine, 2,4-toluenediamine, 2,6-toluenediamine, isophoronediamine and 4,4′-me

, 2017
The working group “Analyses in Biological Materials” of the Permanent Senate Commission for the Investigation of Health Hazards of Chemical Compounds in the Work Area verified the present biomonitoring method.
K. Jones, Jones, K, J. Müller, Hartwig, A, Arand, Michael; https://orcid.org/, MAK Commission, G. Leng, L.T. Budnik, Göen, T, Budnik, L T, T. Göen, Leng, G, null null, Müller, J, et al, J. Cocker, Cocker, J, A. Hartwig, Gries, W, W. Gries   +19 more
core   +2 more sources

Silicas with Polyoxyethylene Branches for Modification of Membranes Based on Microporous Block Copolymers

Membranes, 2023
We have synthesized cubic and linear polysiloxanes containing polyoxyethylene branches (ASiP-Cu) using tetraethoxysilane, polyoxyethylene glycol, and copper chloride as precursors; the products are stable to self-condensation.
Ilsiya M. Davletbaeva, Zulfiya Z. Faizulina, Ekaterina D. Li, Oleg O. Sazonov, Sergey V. Efimov, Vladimir V. Klochkov, Alexander V. Arkhipov, Ruslan S. Davletbaev   +7 more
doaj   +1 more source

Microstructural Changes of Aramid Fiber Due to Reaction with Toluene 2,4-diisocyanate under Tension in scCO2 [PDF]

Polymers, 2019
High modulus aramid fiber, such as Kevlar 49, is conventionally prepared by the heat annealing of high strength aramid fiber under a suitable tension at high temperature, especially higher than 500 °C. This enables the mobility of a rigid molecule chain to be rearranged into a more perfect crystalline or orientation structure under tension.
Haijuan Kong, Qian Xu, Muhuo Yu
openaire   +2 more sources

Literature review and evaluation of biomarkers, matrices and analytical methods for chemicals selected in the research program Human Biomonitoring for the European Union (HBM4EU)

Environment International, 2022
Humans are potentially exposed to a large amount of chemicals present in the environment and in the workplace. In the European Human Biomonitoring initiative (Human Biomonitoring for the European Union = HBM4EU), acrylamide, mycotoxins (aflatoxin B1 ...
Gabriele Sabbioni, Argelia Castaño, Marta Esteban López, Thomas Göen, Hans Mol, Margaux Riou, Romuald Tagne-Fotso   +6 more
doaj   +1 more source