Results 101 to 110 of about 3,396 (226)
Self-foaming diphenolic acid benzoxazine
Polymer, 2012 10.1016/j.polymer.2012.05.044 This work concerns the investigation of porous polybenzoxazines based on the non-toxic renewable diphenolic acid. The approach described relies on the in situ generation of foaming agent (CO2) during the thermal curing.
Zuñiga, C. +4 more
openaire +2 more sources
Photochemical Polymerization of N‑Phenyl Mono-1,3-benzoxazines in Aqueous Media
, 2018 Some N-phenyl monosubstituted mono-1,3-benzoxazines can be polymerized under appropriate UV irradiation in aqueous solutions at room temperature. Photoinduced intramolecular electron transfer from the amine to the phenyl ring in aqueous media produces ...
Rosa María Sebastián (1795849) +2 more
core +1 more source
Novel epoxy-benzoxazine water-based emulsions with reactive benzoxazine surfactants for coatings
Express Polymer Letters, 2014 Novel epoxy-benzoxazine emulsions designed for water-based coatings were prepared and investigated. Bisphenol A-based epoxy resins with molar weights of 340, 377 and 1750 g/mol along with epoxidized soybean oil were emulsified using mono- and bi-functional benzoxazine surfactants, which are able to react with epoxy resins at their cure temperature. The
M. Krajnc, R. Ambrozic, U. Sebenik
openaire +2 more sources
Enantiopure 1,4-Benzoxazines via 1,2-Cyclic Sulfamidates. Synthesis of Levofloxacin
, 2016 1,2-Cyclic sulfamidates undergo efficient and regiospecific nucleophilic cleavage with 2-bromophenols (and related anilines and thiophenols), followed by Pd(0)-mediated amination to provide an entry to substituted and enantiomerically pure 1,4 ...
John F. Bower (1294365) +2 more
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Multifunctional Biobased Benzoxazines: Synthesis, Copolymerization, and Thermal Stability Studies
In accordance with the principle of green synthesis, two biobased benzoxazines with high-purity bifunctional groups, diethylstilbestrol-laurylamine (D-la) and diethylstilbestrol-furfurylamine (D-fa), were prepared by the solution method from laurylamine ...
Tianyu Lan (5139758) +9 more
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Synthesis and antimicrobial activity of new isoxazolyl-1,3-benzoxazines
, 2008 112-116New isoxazolyl-1,3-benzoxazines 4 are synthesized from 4-amino-3,5-dimethyl isoxazole 1 by condensation with different salicylaldehydes, followed by reduction and subsequent smooth ring closure in presence of ...
Rajanarendar, E +2 more
core
, 2003 A straightforward and efficient synthesis of 2-substituted 3,4-dihydro-2H-1,4-benzoxazines 6-9 has been carried out in excellent overall yields through the ring opening of epoxides 1 with arylsulfonamides 2 and 3, followed by cyclization of the ...
D. Landini +3 more
core +1 more source
, 2005 A protocol for regioselective one-pot synthesis of 2-alkyl-3,4-dihydro-3- oxo-2H-1,4-benzoxazines under controlled microwave heating has been developed. Starting from commercially available 2-aminophenols, a base-mediated regioselective O-alkylation took
Dai, Wei Min, Wang, Xuan, Ma, Chen
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BatteriesThis review explores the structural and electrochemical characteristics of carbon materials derived from polybenzoxazines, emphasizing their potential in supercapacitors. A detailed analysis of thermal degradation by-products during carbonization reveals
Thirukumaran Periyasamy +2 more
doaj +1 more source
Synthesis and preliminary bioassays of some bis -1,3 - benzoxazines
Revista Colombiana de Química, 2010 Se hicieron ensayos preliminares con miras a establecer la posible actividad insecticida de cinco bis-l,3-benzoxazinas del tipo 3,3-etilen-bis(3,4-dihidro-6R-2H-1,3-benzoxazina).
A. Rivera +4 more
doaj