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C. Gorsche, K. Seidler, M. Kury, J. Steindl, P. Dorfinger, J. Stampfl, N. Moszner, R. Liska:
"The power of chain transfer in the field of photopolymer applications";
Poster: 12th International Conference on Advanced Polymers via Macromolecular Engineering, Ghent; 05-21-2017 - 05-25-2017; in: "Advanced Polymers via Macromolecular Engineering", Advanced Polymers via Macromolecular Engineering, Nr.12, Ghent, Belgium (2017), 143.

Multifunctional (meth)acrylate-based thermosetting resins are state-of-the-art materials for modern photopolymer applications such as 3D structuring, dental medicine, tissue engineering, or microelectronics. However, highly-crosslinked, irregular photopolymer networks are created due to an unregulated, radical chain-growth curing mechanism. Resulting materials often suffer from low toughness and high polymerization-induced shrinkage stress.[1] Chain transfer strategies have been developed in order to regulate the radical curing process (e.g. thiol-ene chemistry[2]) and create tunable photopolymers with improved mechanical performance. We have adapted different chain transfer strategies (i.e. addition fragmentation chain transfer reagents,[3],[4] silane-ene chemistry[5]) for the advancement of this strategy. With the presented tools we were able to create photopolymer networks with reduced shrinkage stress, high final conversion, tunable thermomechanical properties and improved toughness. First application oriented tests outline the potential of such photopolymers for lithography-based 3D structuring.

Multifunctional (meth)acrylate-based thermosetting resins, photopolymer, 3D structuringdental medicine, tissue engineering, or microelectronics