Open AccessActivity of some disiloxanes toward the cation exchange resin-catalyst in the siloxane equilibration reaction
Author(s) -
Milutin N. Govedarica
Publication year - 2000
Publication title -
journal of the serbian chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.227
H-Index - 45
eISSN - 1820-7421
pISSN - 0352-5139
DOI - 10.2298/jsc0009639g
Subject(s) - catalysis , chemistry , siloxane , viscosity , hexamethyldisiloxane , function (biology) , reaction conditions , chemical engineering , polymer chemistry , thermodynamics , organic chemistry , polymer , physics , plasma , quantum mechanics , evolutionary biology , biology , engineering
The relative activities of four disiloxanes toward the cation exchange resin, which was used as an equilibration catalyst, were determined in such a way that the equilibrium initially present in an arbitrary chosen equilibrate was disturbed by adding the respective disiloxanes to it, and then by recording the viscosity of the equilibrating mixtures as a function of reaction time. As a result, a set of different viscosity-reaction time relationships was obtained, which implies different activities of disiloxanes toward the catalyst. In this way the following decreasing order of acitivites was established: 1,3-tetramethyldisiloxane > 1,3-divinyltetramethyldisiloxane > hexamethyldisiloxane > 1,3-bis(3-carboxypropyl)tetramethyldisiloxane.