Polytriazole resins toughened by an azide-terminated polyhedral oligomeric silsesquioxane (OADTP)

Abstract

An azido-terminated polyhedral oligomeric silsesquioxane (POSS) compound, octakis(azidopropyl-3-oxycarbonyl-1-decyl-10-thiopropyl-3-)POSS (OADTP), is synthesized and characterized. POSS-polytriazole (PTA) resins are prepared from an azide, an alkyne monomer, and OADTP. The toughening effect of OADTP on PTA resins is analyzed by impact performance test and electronic microscope characterization, and the thermal performance of resins is measured by thermogravimetric analysis and dynamic mechanical analysis. The results show that the addition of the POSS can improve the mechanical properties of PTA resins. The impact strength of POSS-PTA resins first increases and then decreases with the increase in the POSS compound, and the maximum one arrives at 54.8 kJ m−2 which increases by 44.2% as compared to 38 kJ m−2 of the PTA resin. A good thermal stability remains in POSS-PTA resins.

Toughening of a polytriazole resin with diprogargyl poly(propylene glycol)s

“…In the past, our laboratory has prepared a series of PTA resins, and the structures and properties of the PTA resins have been systematically investigated. [ 4–7 ] The PTA resins demonstrated excellent thermal properties and mechanical properties and could be used as matrix resins of advanced composite materials. [ 8 ] The rapid advance of aerospace technology facilitates a high demand for PTA resins with high toughness.…”

“…However, there was an obvious decrease in heat resistance. Yu, et al [ 7 ] modified the PTA resin with POSS with terminal azide group (OADTP) and prepared OADTP‐PTA resins. They found that the impact strength of the cured OADTP‐PTA resins highly increased.…”