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J. Steindl, A. Svirkova, T. Koch, M. Marchetti-Deschmann, N. Moszner, C. Gorsche:
"Silanes as promising chain transfer agents for radical photopolymerization";
Talk: RadTech Europe Conference & Exhibition 2017, Prag; 2017-10-17 - 2017-10-19; in: "RadTech Europe Conference & Exhibition 2017", (2017), 15.

Photopolymers are an important class of materials, but the evolution of high shrinkage stress during the reaction and very brittle behaviour of the resulting polymers remain challenging problems. These drawbacks can be attributed to the radical chain growth mechanism resulting in inhomogeneous network architectures [1]. A well-known approach for the regulation of this reaction are chain transfer agents (CTAs), whereby adjustable thermo-mechanical properties are achieved.
Aside from thiols as the most popular CTAs (thiol-ene-chemistry) [2] Lalevée and Allonas [3] proposed silanes as alternative. Based on this publication different substituted silanes were investigated regarding their reactivity with various enes. MALDI MS and GPC measurements confirmed the chain transfer mechanism [4]. Silane-acrylate-based photopolymer networks were produced with reduced shrinkage stress and tunable thermomechanical properties.

Photopolymers, the radical chain growth mechanism, thiols, silanes, reduced shrinkage stress and tunable thermomechanical properties