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Photoinitiators with Functional Groups, 8
Author(s) -
Jauk Sigrid,
Liska Robert
Publication year - 2005
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200500507
Subject(s) - photoinitiator , photopolymer , benzophenone , photochemistry , triethanolamine , polymerization , polymer chemistry , thioxanthone , materials science , reactivity (psychology) , prepolymer , chemistry , polymer , organic chemistry , monomer , analytical chemistry (journal) , medicine , alternative medicine , pathology , polyurethane
Summary: Bimolecular type‐II photoinitiators for radical photopolymerization suffer from a diffusion‐controlled limitation of reactivity and from deactivation by back electron transfer. Here, a very efficient concept to increase the photoinitiator activity by the covalent binding of phenylglycine to benzophenone using a methylene spacer is presented. Photo‐DSC experiments proved that the rate of polymerization can be tripled in comparison to a physical mixture of the components or an industrially applied system with triethanolamine as coinitiator.Structure of the new photoinitiator synthesized here.