Abstract
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.
Highlights
Polytriazole (PTA) resins have shown potential application as matrices in advanced composites owing to their good thermal performance and mechanical properties
The impact strength of OADTP-PTA-16 resin increases by 44.2% compared with 38 kJ m−2 of the PTA resin
The effect of OADTP content on the thermal properties of cured polyhedral oligomeric silsesquioxane (POSS)-PTA resins was evaluated with Dynamic mechanical analysis (DMA) and Thermogravimetric analysis (TGA), and the typical DMA and TGA curves are shown in Figures 8 and 9
Summary
Polytriazole (PTA) resins have shown potential application as matrices in advanced composites owing to their good thermal performance and mechanical properties. Huang group [8,9,10,11] had developed a series of thermosetting PTA resins by 1,3-dipolar cycloaddition reaction of azides and alkynes since 2002. Laine et al [18,19] found that POSS with different organic groups have influence on the dynamic mechanical properties, fracture toughness, and thermal stability of the material produced from POSS. New organic–inorganic hybrid functional materials could be obtained using POSS as a nano-structured unit to modify polymers. Mohamed et al [20] reported some prepared mono-functionalized BZ ring-containing hybrid organic/inorganic (POSS) materials, and this polybenzoxazines (PBZ-POSS) displayed a higher value of Tg and a higher char yield. The structure, mechanical properties, and thermal properties of the OADTP-PTA resins are investigated
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