Toughening of photo-curable polymer networks: a review
| Autor: | Robert Liska, Martin Schwentenwein, Samuel Clark Ligon-Auer, Jürgen Stampfl, Christian Gorsche |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Toughness Acrylate Polymers and Plastics Polymer science Organic Chemistry Thermosetting polymer Bioengineering Polymer architecture 02 engineering and technology Polymer Epoxy 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry 0104 chemical sciences chemistry.chemical_compound Photopolymer chemistry visual_art visual_art.visual_art_medium Organic chemistry 0210 nano-technology Curing (chemistry) |
| Zdroj: | Polymer Chemistry. 7:257-286 |
| ISSN: | 1759-9962 1759-9954 |
| DOI: | 10.1039/c5py01631b |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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