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Monomers for low shrinking composites, 2. Synthesis of branched methacrylates and their application in dental composites
Author(s) -
Klee Joachim E.,
Neidhart Frank,
Flammersheim HansJürgen,
Mülhaupt Rolf
Publication year - 1999
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/(sici)1521-3935(19990301)200:3<517::aid-macp517>3.0.co;2-4
Subject(s) - methacrylate , shrinkage , materials science , acrylate , monomer , composite material , polymer chemistry , diluent , viscosity , ethylene glycol , chemistry , polymer , organic chemistry
A novel family of branched methacrylates was prepared by Michael addition reaction of various di‐ and polyamines with ethylene glycol acrylate methacrylate. Molecular masses of the resulting branched methacrylates were varied between 900 to 1 800 g/mol. Such branched methacrylates exhibit very low viscosity (50 to 500 mPa·s) and a low volume shrinkage (δ V = 1.5 to 6.0%) during photoinitiated cure. Dental composites with volume shrinkage of 1.0% were based upon blends of branched methacrylates and Bis‐GMA. In contrast to conventional reactive diluents, branched methacrylates give simultaneous improvement of low volume shrinkage and low viscosity.