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J. Steindl, A. Svirkova, T. Koch, M. Marchetti-Deschmann, N. Moszner, C. Gorsche:
"Regulated Photopolymer Networks via Silane-Acrylate Chemistry";
Talk: Danube Vltava Sava Polymer Meeting 2017, Wien; 2017-09-05 - 2017-09-08; in: "Danube Vltava Sava Polymer Meeting 2017", Book of Abstracts.com, (2017), ISBN: 978-3-9504017-6-9; OP-3.

State-of-the-art photopolymer resins (e.g. multifunctional acrylates) are an important class of materials in applications ranging from protective and decorative coatings to more advanced fields such as biomedicine and 3D-printing. During the rapid radical curing reaction high shrinkage stress is formed and resulting polymer networks suffer from brittle material behavior, which represent the most pressing challenges with these materials. The stated drawbacks can be attributed to the radical chain growth mechanism resulting in inhomogeneous network architectures [1]. The implementation of chain transfer agents (CTAs) has been reported as powerful approach for the regulation of final network architecture and material properties.
Aside from thiols (thiol-ene-chemistry) [2], Allonas [3] proposed silanes as possible CTAs. Based on this work different substituted silanes were investigated regarding their reactivity with various enes, whereupon acrylates give the most promising results. MALDI MS and GPC measurements confirmed the chain transfer mechanism during the silane-acrylate photopolymerization [4]. Furthermore, silane-acrylate-based photopolymer networks were produced with reduced shrinkage stress and tunable thermomechanical properties.

photopolymer resins, biomedicine, 3D-printing, high shrinkage stress, brittle material behavior, chain transfer agents, silanes, the silane-acrylate photopolymerization, reduced shrinkage stress and tunable thermomechanical properties