Results 101 to 110 of about 134,814 (297)
Ultraviolet-curable Silicone/Urethane Elastomer and Its Selective Modulus Enhancement [PDF]
, 2018 Department of Chemical EngineeringThermosets usually have brittle structure, but thermosetting polyurethane (PU) is classified as elastomer due to its urethane linkage in the backbone.
Kim, Dajeong
core
Chemical Engineering Journal, 2018 Production of polyurethane is increasing since the recent years. Nevertheless, this production uses hazardous chemicals, which is isocyanate. Academy has put a lot of effort to develop some non-isocyanate polyurethane routes. One of the most promising is
Wander Y. Pérez-Sena +6 more
semanticscholar +1 more source
Oil and fat absorbing polymers [PDF]
, 1977 A method is described for forming a solid network polymer having a minimal amount of crosslinking for use in absorbing fats and oils. The polymer remains solid at a swelling ratio in oil or fat of at least ten and provides an oil absorption greater than ...
Marsh, H. E., Jr.
core +1 more source
Frontiers in Chemistry, 2019 Using isocyanate-functionalized Kraft lignin as a reactive macromonomer for the preparation of polyurethane foams by a prepolymer technique is a well-known strategy to incorporate the biomacromolecule into a higher value polymer material.
Mareike Zieglowski +9 more
semanticscholar +1 more source
Frontiers in Medicine, 2019 Introduction: Di-isocyanates TDI (toluene di-isocyanate), MDI (diphenylmethane di-isocyanate), and HDI (hexamethylene di-isocyanate) are the most common chemicals causing occupational asthma. Di-isocyanate inhalation has been reported to induce oxidative
Jussi Leppilahti +8 more
doaj +1 more source
The Challenging P‐Alkylation of Aromatic Phosphorus Heterocycles and Follow‐Up Reactions
ChemistryEurope, EarlyView.P‐alkylation of λ3σ2‐phosphinines is hindered by weak nucleophilicity and scarce synthetic access, previously requiring multistep routes or extreme electrophiles. A direct ambient‐condition method is reported using 3,5‐bis(trimethylsilyl)‐phosphinine/B(C6F5)3 with esters or iso(thio)cyanates to generate stable 1‐R‐phosphininium salts.
Samantha Frank +6 more
wiley +1 more source
Chemistry – A European Journal, EarlyView.Three 2‐phosphinophenylaluminum dichloride complexes were synthesized and characterized as novel intramolecular FLPs. These FLP systems exhibit high Lewis acidity and effectively activate challenging substrates including aliphatic ketones, imines, and esters. DFT analysis revealed that strain release and Al–P dynamics govern their reactivity. Abstract (
Yoshihiro Nishimoto +2 more
wiley +1 more source
Urethane Formation with an Excess of Isocyanate or Alcohol: Experimental and Ab Initio Study
Polymers, 2019 A kinetic and mechanistic investigation of the alcoholysis of phenyl isocyanate using 1-propanol as the alcohol was undertaken. A molecular mechanism of urethane formation in both alcohol and isocyanate excess is explored using a combination of an ...
Wafaa Cheikh +6 more
semanticscholar +1 more source
It's a Gas: Bioconjugation With Vapor‐Phase Reagents
Chemistry – A European Journal, EarlyView.Gaseous reagents are an emerging class of bioconjugation reagents that can offer alternative selectivity paradigms for the construction of precise bioconjugates. A variety of both inert and highly reactive gases have recently been developed for bioconjugation use.
Yuxuan Ding, Jun Ohata, Zachary T. Ball
wiley +1 more source
Learning Strategies from Nature's Blueprint to Cyclic Carbonate Synthesis
ChemSusChem, Volume 18, Issue 6, March 15, 2025.The development of sustainable synthetic methods for cyclic carbonates draws inspiration from nature, focusing on eco‐friendly processes and renewable resources like CO2 and biomass. This review explore various CO2 activation mechanisms, green chemistry principles, and green catalysts.
Erika Saccullo +4 more
wiley +1 more source