To increase the durability and reliability of thermosets, self-healing via a vascular network, is developed.
A judicious choice of healing agents proves to be necessary to achieve the best recovery of properties.
Four low viscosity two-component epoxy-amine healing systems were compared, to check which glass
transition temperature range would be best to recover mechanical properties (Tg ranging from -8 to
68 C). Interdiffusion experiments show that all systems react sufficiently slowly at room temperature to
allow interdiffusion of epoxy and amine over more than 1 mm before the diffusion is stopped by
vitrification. Swelling tests revealed that most of the selected healing agents diffuse into the surrounding
matrix and swell it. This might be beneficial for crack closure and improved adhesion between healing
system and matrix. Flexural tests demonstrated that, the higher the glass transition temperature of the
fully cured healing system, the higher the healing capability.
Original languageEnglish
Pages (from-to)302-310
Number of pages9
JournalPolymer Testing
StatePublished - Sep 2017

ID: 32856261