Toughening of photo-curable polymer networks: a review
Top Cited Papers
- 20 November 2015
- journal article
- review article
- Published by Royal Society of Chemistry (RSC) in Polymer Chemistry
- Vol. 7 (2), 257-286
- https://doi.org/10.1039/c5py01631b
Abstract
Photo-curable resins based on multifunctional acrylate monomers are commonly applied as thin films (e.g. protective coatings, printing inks, etc.) and in recent years are also used for the fabrication of bulk objects such as dental fillings and 3D-printed parts. While rapid curing and good spatial resolution are advantages to these systems, brittleness and poor impact resistance due to inhomogeneous polymer architecture and high crosslink density are serious drawbacks. By comparison, epoxy thermoset resins suffered many years ago from similar problems, but since then are found in ever demanding applications thanks to a variety of approaches to increase polymer toughness. Based on these successes, researchers have tried to translate strategies for toughening epoxy resins to photopolymer networks. Therefore, this review surveys relevant scientific papers and patents on the development of crosslinked epoxy-based polymers and also photo-curable polymers based on multifunctional acrylates with improved toughness. Strategies developed to reduce brittleness include working with monomers, which intrinsically give tougher polymers, particulate additives, and alternate forms of polymerization and polymer architecture (e.g., dual-cure networks, interpenetrating networks, thiol–ene chemistry). All of these strategies have advantages and yet application specific rigours must also be considered before and during formulation development.Keywords
Funding Information
- Christian Doppler Forschungsgesellschaft (Laboratory for Digital and Restorative Dentistry)
- Austrian Science Fund (P27059)
This publication has 100 references indexed in Scilit:
- Efficient stabilization of thiol-ene formulations in radical photopolymerizationJournal of Polymer Science Part A: Polymer Chemistry, 2013
- An overview of tissue and whole organ decellularization processesBiomaterials, 2011
- Thiol–ene–methacrylate composites as dental restorative materialsDental Materials, 2011
- Thiol–Ene Click ChemistryAngewandte Chemie-International Edition, 2010
- Chain confinement in polymer nanocomposites and its effect on polymer bulk propertiesJournal of Polymer Science Part B: Polymer Physics, 2010
- Strain rate effect on toughening of nano-sized PEP–PEO block copolymer modified epoxyActa Materialia, 2009
- Strong, Tailored, Biocompatible Shape‐Memory Polymer NetworksAdvanced Functional Materials, 2008
- The influence of cure conditions on the morphology and phase distribution in a rubber-modified epoxy resin using scanning electron microscopy and atomic force microscopyPolymer, 2005
- Double‐Network Hydrogels with Extremely High Mechanical StrengthAdvanced Materials, 2003
- Addition-fragmentation processes in free radical polymerizationProgress in Polymer Science, 1996