Bis(4‐methoxybenzoyl)diethylgermane: A Highly Efficient Photoinitiator for the Polymerization of Vinylcyclopropanes | Zendy

Catel Yohann | Zendy; Fischer Urs | Zendy; Fässler Pascal | Zendy; Moszner Norbert | Zendy

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Bis(4‐methoxybenzoyl)diethylgermane: A Highly Efficient Photoinitiator for the Polymerization of Vinylcyclopropanes

Author(s) -

Catel Yohann,

Fischer Urs,

Fässler Pascal,

Moszner Norbert

Publication year - 2016

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/macp.201600463

Subject(s) - photoinitiator , photopolymer , reactivity (psychology) , monomer , polymerization , polymer chemistry , amine gas treating , chemistry , materials science , photochemistry , organic chemistry , polymer , medicine , alternative medicine , pathology

Bis(4‐methoxybenzoyl)diethylgermane (BMDG) is used for the photopolymerization of six 1,1‐disubstituted 2‐vinylcyclopropanes (VCPs). A significantly higher photopolymerization reactivity compared to the conventional camphorquinone (CQ)/amine or CQ/amine/iodonium salt photoinitiator systems is observed. Furthermore, the influence of the electron‐withdrawing substituents on the monomer reactivity is investigated. 1‐Ethoxycarbonyl‐1‐ethylcarbamoyl‐2‐vinylcyclopropane 5 and 1‐ethoxycarbonyl‐2‐vinylcyclopropanecarboxylic acid 2 are found to be the most reactive monomers. 1,1‐Disubstituted VCP‐based dental composites containing BMDG are formulated. Those materials exhibit good mechanical properties as well as a low polymerization shrinkage.

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