Please wait.'

Page is loading'


Home  > Raw materials & technologies  > Raw materials  > Coatings binders  > Novel self-healing network and toughening...

Tuesday, 17 September 2019
pdf
Raw materials & technologies, Raw materials, Coatings binders

Novel self-healing network and toughening epoxy-novolac resin

Monday, 18 December 2017

A novel bioresin can be beneficial from smart materials to toughen hybrid epoxy thermosets with potential applications in composites, adhesives, and surface coatings.

Novel self-healing network and toughening epoxy-novolac resin. Source: ksenia bravo - Fotolia.com

Novel self-healing network and toughening epoxy-novolac resin. Source: ksenia bravo - Fotolia.com

Poly(furfuryl alcohol) bioresin (PFA) was synthesised and utilised through two distinct alloying strategies. It was crosslinked by a bismaleimide (BMI) via Diels-Alder reaction.

Improved tensile properties

The PFA-BMI polyadduct network showed a high pyrolytic thermostability (char yield ∼51% at 600 °C). PFA was also used for modification of epoxy-novolac resin (EP). EP hybrid resins containing 5, 10, and 15 wt% of PFA were cured by a polyamine hardener. Despite of different curing mechanisms, PFA had no effect on EP curing behaviour. PFA at the composition of 15 wt% improved tensile properties and toughness of EP, so that it almost doubled tensile modulus and elongation at break. However, PFA slightly deteriorated flexural properties of EP. PFA also decreased Tg of EP, with a maximum decrease of 22 °C. Besides, PFA disfavored initial thermostability of EP, but improved its pyrolytic char yield.

The study is published in: Applied Polymer Science, Volume 135, Issue 12, March 20, 2018.

top of page
Comments (0)
Add Comment

Post comment

You are not logged in

register