Please wait.'

Page is loading'


Home  > Raw materials & technologies  > Raw materials  > Coatings binders  > Toughening of photo-curable polymer networks

Sunday, 15 September 2019
pdf
Raw materials & technologies, Raw materials, Coatings binders

Toughening of photo-curable polymer networks

Monday, 18 January 2016

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.

Researchers have tried to translate strategies for toughening epoxy resins to photopolymer networks. Source: Sebastian Geimecke/pixelio.de

Researchers have tried to translate strategies for toughening epoxy resins to photopolymer networks. Source: Sebastian Geimecke/pixelio.de

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.

Review surveys scientific papers and patents

Therefore, a 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.

The study is published in: Polymer Chemistry, Issue 2, 2016

top of page
Comments (0)
Add Comment

Post comment

You are not logged in

register