Epichlorohydrin (ECH, 98%), tetraethylenepentamine
(TEPA, 98%), and furfuryl alcohol (FAL, 99%) were purchased from Aladdin.
Common names CAS number Component A Polyamine epoxy-resin adduct 112-57-2 Tetraethylenepentamine
Bisphenol A-co-epichlorohydrin 25068-38-6 Bisphenol-F epichlorohydrin 28064-14-4 Component B Bisphenol A-co-epichlorohydrin 25068-38-6 Bisphenol-F epichlorohydrin 28064-14-4 2,3-Epoxypropyl neodecanoate 26761-45-5 % weight Acronym Component A [greater than or equal to]10, <20 TEPA [greater than or equal to]0.25, <1 DGEBA [greater than or equal to]0.25 DGEBF Component B [greater than or equal to]50, <75 DGEBA [greater than or equal to]20, <25 DGEBF [greater than or equal to]2.5, <25 Table 2: Nomenclature used to identify the different specimens.
investigated immobilizing copper chelating agent: triethylenetetramine and tetraethylenepentamine
onto macroporous poly (GMA-co-TMPTMA) microspheres.
The company added that the increase is necessary to offset higher raw materials costs, including recent price increases on tetraethylenepentamine
, triethylenetetramine and polyetheramines.
(TEPA, 25 wt%, 20 mL) is injected, and the interfacial polycondensation reaction is carried out by further shearing the emulsion at 800 rpm and lasted for 3 h at 50[degrees]C.
Compounds which are frequently used to meet the above include surfactants tetraethylenepentamine
, cetyltrimethylammonium bromide (CTAB) , tetraoctylammoniumbromide , andpolyelectrolytes such as polyethyleneimine (PEI) , polyethylene glycols (PEG) , polyvinylpyrrolidone (PVP) , polyetheretherketone (PEEK) , and polyallylamine (PAAm) .
Graft-copolymerization of the DPNR latex was carried out with styrene or acrylonitrile as a monomer, using tert-butyl hydroperoxide with tetraethylenepentamine
as an initiator.
Initial identification of carbohydrates in these samples was determined by HPLC using a Waters Radial-Pak silica cartridge modified with tetraethylenepentamine
according to the methods of Hendrix et al.
offers Bakelite epoxy curing agents, which include N-aminoethyl piperazine, diethylenetriamine, triethylenetotramine and tetraethylenepentamine
Diamines with short aliphatic chains (ethylene diamine and 1,4-diamino butane) and a relatively high number of amine functionalities (tetraethylenepentamine
) were chosen so that polymerization would occur at lower temperatures to produce PBzs with improved thermal stability.
The company added that these price increases were needed to recover higher operating and raw material costs such as the recent price increases for tetraethylenepentamine