Characterization of Methoxymethylmelamine Resins by Liquid Chromatography and Mass Spectrometry

Pyrolysis and THM reactions of melamine and its resins

“…Several studies have been carried out to investigate the composition of uncured melamine resins with HPLC-MS [2][3][4][5][6], but after curing the solubility of such a polycondensate is not given anymore. Wilcken and Schulten [7] have firstly observed, that pyrolysis of a polyester crosslinked with a melamine resin results in the formation of melamine and methylmelamine.…”

Rapid Melamine-Formaldehyde Resin Characterization by Means of Quantitative13C NMR with Polarization Transfer

“…Several analysis techniques can be applied for resin investigation, such as elemental analysis, wet-chemical methods, high-performance liquid chromatography (HPLC), gel permeation chromatography (GPC), capillary zone electrophoresis, mass spectrometry (MS), and infrared and Raman spectroscopy or nuclear magnetic resonance spectroscopy (NMR) and combinations thereof. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] In particular, NMR-based methods often suffer from long measurement times. [3][4][5]11,13,23] Chemical compositions of melamine resins (sum parameters: formaldehyde content per melamine and degree of etherification) are mostly determined by wet-chemical methods, which are usually time-consuming procedures.…”

“…[8,18,32] For investigations of resin structure, HPLC in combination with MS detection is the method of choice. [21,22] In industry, average molar masses of melamine resins are compared by their viscosity at a certain concentration or by their content of monomeric structures. [33] EXPERIMENTAL SECTION…”

Characterization of a Linear Melamine Formaldehyde Resin

“…The purpose of this study was to identify all species within the resins and to find suitable methods for the characterization of these new materials at all processing stages. The methods of choice were mass spectrometry for the identification of individual species, as has been shown to work for conventional melamine resins, [4][5][6][7][8][9] gel permeation chromatography (GPC) for the characterization of the molar masses, and pyrolysis-gas chromatography=mass spectrometry (GC=MS) to investigate a fully cured resin. [10] EXPERIMENTAL SECTION Materials 2,2,4,6-Tetramethylmelamine (TMM) was synthesized by reacting cyanuric chloride with methylamine and dimethylamine according to the literature.…”

“…Synthesis of 2,2,4,6-tetraalkylmelamine (2) from cyanuric chloride (1), formation of a resin(3,4), and structure of a cured resin(5).…”