Results 11 to 20 of about 3,344 (226)

Recycling of Polyurethane Waste: Facile Hydrothermal Conversion Using Acidic and Basic Additives. [PDF]

ChemSusChem
Ethylenediamine efficiently catalyses the hydrothermal recycling of polyurethane (PU) into monomers. The NH functional groups promote carbamic acid decomposition via zwitterion interactions, outperforming inorganic acids and bases, and enabling selective depolymerisation of PU under mild conditions for circular chemical utilisation.
Wang H, Gupta H, Shiju NR.
europepmc   +2 more sources

Curing Characteristics of Urethane-Dimethacrylate Homopolymers and Their Composites for Potential Application in Bone Cement

Engineering Proceedings, 2022
The polymerization of methacrylate compositions used in bone cement is often accompanied by a strong exothermic effect. The polymerizing mass heats up to very high temperatures at the cement application site, irritating the adjacent tissues and even cell
Marta W. Chrószcz-Porębska, Izabela M. Barszczewska-Rybarek   +1 more
doaj   +1 more source

β-Cyclodextrin conjugated bifunctional isocyanate linker polymer for enhanced removal of 2,4-dinitrophenol from environmental waters [PDF]

Royal Society Open Science, 2018
In this work, we reported the synthesis, characterization and adsorption study of two β-cyclodextrin (βCD) cross-linked polymers using aromatic linker 2,4-toluene diisocyanate (2,4-TDI) and aliphatic linker 1,6-hexamethylene diisocyanate (1,6-HDI) to ...
J. M. Anne, Y. H. Boon, B. Saad, M. Miskam, M. M. Yusoff, M. S. Shahriman, N. N. M. Zain, V. Lim, M. Raoov   +8 more
doaj   +1 more source

Synthesis and Characterization of Novel Nanoporous Gl-POSS-Branched Polymeric Gas Separation Membranes

Membranes, 2020
Novel nanoporous Gl-POSS-branched polymers based on the macroinitiator of anionic nature, 2,4-toluene diisocyanate, and octaglycidyl polyhedral oligomeric silsesquioxane (Gl-POSS) were obtained as gas separation membranes.
Ilnaz I. Zaripov, Ilsiya M. Davletbaeva, Zulfiya Z. Faizulina, Ruslan S. Davletbaev, Aidar T. Gubaidullin, Artem A. Atlaskin, Ilya V. Vorotyntsev   +6 more
doaj   +1 more source

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

Synthesis of novel urethanes from a castor oil derived C22-acyloin [PDF]

, 2011
The synthesis of new bio-based chemical building blocks, resulting from the condensation of a renewable C-22 acyloin derived from non-edible castor oil, with mono- and bifunctional isocyanates is reported. The condensation with aliphatic mono-isocyanates
Stevens, Christian, Van der Steen, Marijke, Vilums, Maris   +2 more
core   +2 more sources