Preparation and characterization of POSS‐SiO₂/cyanate ester composites with high performance

Abstract

In this article, a hybrid filler based on polyhedral oligomeric silsesquioxane and silica, coded as POSS-SiO 2 , has been successfully synthesized. The structure of POSS-SiO 2 was studied by Fourier-transform infrared spectra, X-ray diffraction, and scanning electron microscopy. Then the POSS-SiO 2 was compounded with dicyclopentadiene bisphenol dicyanate ester (DCPDCE) resin to prepare composites. The effects of POSS-SiO 2 on the curing reaction, mechanical, thermal, dielectric and tribological properties of DCPDCE resin were investigated systematically. Results of differential scanning calorimetry show that the addition of POSS-SiO 2 can facilitate the curing reaction of DCPDCE and decrease the curing temperature of DCPDCE. Compared with pure DCPDCE resin, the impact and flexural strengths of the composites materials are improved markedly with up to 72 and 52% increasing magnitude, respectively. Meanwhile, the POSS-SiO 2 /DCPDCE systems exhibit lower dielectric constant and loss than pure DCPDCE resin over the testing frequency

Mechanical and thermal properties of microchannel insulating foams comprising a multifunctional epoxy/polyhedral oligomeric silsesquioxane nanocomposite

“…7 These strategies commonly employ silica-based additives, with increasingly smaller particulates showing improved environmental durability, thermal stability, and/or mechanical properties of the resin system due to the increase in specific surface area of the well-dispersed nano-additives. [5][6][7][8][9][10] In particular, hybridized inorganic-organic silica-polymer nanomaterials based on polyhedral oligomeric silsesquioxane (POSS) have shown excellent potential not only in improving mechanical properties [10][11][12][13][14][15][16][17] and thermal stability 10,11,[14][15][16][18][19][20][21][22][23] but also for enhanced dielectric performance, 15,16,[24][25][26][27][28] flammability resistance, [29][30][31] catalysis, 32 electrolytic capabilities, [33][34][35] thermal and electrical conductivities, 26,28,36 abrasion resistance, 10,16 shap...…”

Synthesis, structure, and properties of high‐impact polystyrene/octavinyl polyhedral oligomeric silsesquioxane nanocomposites

“…POSS shows outstanding rigidity and stability. The substituent groups of POSS, including vinyl , styryl , methacrylate , phenyl , epoxy , amine , aminophenyl , hydroxyl , norbornylene , silica , and graphene oxide , determine its reactivity. POSS with substituent groups can be used to prepare organic–inorganic copolymers and composites.…”

Tribo-Mechanical Characterization of Carbon Fiber-Reinforced Cyanate Ester Resins Modified With Fillers

“…The brittleness is caused due to the presence of triazine groups, which have a high crosslinking density. Thus, the frictional and wear behavior of these resins are not good, and the toughening of the CE resins to make them suitable for industrial applications has become a topic of interest in recent years [ 15 ]. Several researchers have investigated and identified methods to enhance the tribo-behavior of CEs at high temperatures [ 14 , 16 , 17 , 18 ].…”