0000000000121581

AUTHOR

J. Hetper

showing 2 related works from this author

Properties of trialkylamines as catalysts of resoles synthesis

2000

A series of the syntheses of phenol–formaldehyde resoles was carried out in the presence of trimethyl-, triethyl-, tripropyl-, and tributylamines and sodium hydroxide as catalysts for this process. The rate constants were calculated for the partial reactions identified in the synthesis. Also, the performance properties of the resins obtained and the hardened resin samples were estimated in simple tests. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 898–902, 2000

Condensation polymerPolymers and PlasticsTertiary amineTrimethylamineGeneral ChemistryTributylamineSurfaces Coatings and FilmsCatalysischemistry.chemical_compoundReaction rate constantchemistrySodium hydroxideMaterials ChemistryOrganic chemistryJournal of Applied Polymer Science
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Synthesis of phenol–formaldehyde resole resins in the presence of tetraalkylammonium hydroxides as catalysts

2000

Abstract We synthesised phenol–formaldehyde resole resins in the presence of tetraalkylammonium hydroxides as catalysts. The activity of these catalysts was compared with the activity of sodium hydroxide. Gas chromatography, thin layer chromatography, 13 C NMR spectrometry, potentiometric titration and a few simple physicochemical methods were used to estimate the composition of the obtained resins and their properties. It was concluded from these studies that tetraalkylammonium hydroxides are active catalysts and the resins obtained in their presence show some interesting properties.

Aqueous solutionPolymers and PlasticsOrganic ChemistryPotentiometric titrationFormaldehydeThin-layer chromatographyCatalysischemistry.chemical_compoundchemistrySodium hydroxideMaterials ChemistryPhenolOrganic chemistryGas chromatographyPolymer
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