Synthesis, structural characterization and properties of a cubic octa-n-propylsilsesquioxane inorganic–organic hybrid material

Synthesis of silanol-rich long-life polysilsesquioxane liquids by cosolvent-free hydrolytic polycondensation of organotrimethoxysilanes followed by aging

“…Second, the 29 Si NMR spectra exhibited a signal at −65.8 ppm, which is close to the peak position expected for the cubic octamer of poly(Pr-SQ) (−66.16, 14 −67.22, 15 and −66.93 ppm (ref. 47,48)) and poly(3-SP-SQ) (−66.16 ppm (ref. 14)).…”

Multifunctional POSS Cyclic Carbonates and Non-Isocyanate Polyhydroxyurethane Hybrid Materials

“…Polyhedral oligomeric silsesquioxanes (POSS), pioneered by Scott in 1946, comprise polymeric or cagelike organosilicons with the chemical formula (RSiO 1.5 ) n , in which cages are denoted as R n T n , n = 6, 8, 10, 12, ...., and R represents functional organic or aliphatic groups attached to the periphery of the nanometer-scaled molecular, silica-like core . The average POSS core diameter falls in the range of approximately 0.45–0.53 nm . The polarity and functionality of the organic substituents govern the POSS miscibility, dispersion, and self-assembly, which is the key to tailor a wide variety of nano- and microstructured organic/inorganic hybrid materials .…”

“…1 The average POSS core diameter falls in the range of approximately 0.45−0.53 nm. 2 The polarity and functionality of the organic substituents govern the POSS miscibility, dispersion, and self-assembly, which is the key to tailor a wide variety of nano-and microstructured organic/ inorganic hybrid materials. 3 In general, POSS is readily prepared by the controlled hydrolysis of R 1 Si(OR 2 ) 3 compounds, in which R 1 is alkyl with functional end groups and R 2 is methyl or ethyl.…”

Preparation and characterization of room temperature vulcanized silicone rubber using α-amine ketoximesilanes as auto-catalyzed cross-linkers

“…Silicone rubber has attracted considerable research interest because of the high thermal stability of poly(dimethylsiloxane)s (PDMS), their resistance to oxidative degradation, good lowtemperature performance as well as good non-stick properties, low toxicity and low chemical reactivity. [1][2][3] Thus, the commercial silicon rubber has been widely used in many elds, such as aviation, electrical industry, medical treatment, and automobile manufacturing. 4,5 It is also worth noticed that polysiloxane is derived from non-petrochemical route and could be widely applied to promote the low carbon economy.…”

“…6,7 Higher performance silicone rubber requires vulcanization process because this process could build highly three dimensional networks in the materials, making them more tougher than linear PDMS. [2][3][4][5][6][8][9][10][11][12][13][14][15][16] Vulcanization of silicone rubber can be carried out at both elevated and ambient temperatures, and the silicone rubber obtained is called high temperature vulcanization (HTV) silicone rubber and room temperature vulcanization (RTV) silicone rubber, respectively. 6,8,16 Although RTV silicon rubber have poorer mechanical properties compared to HTV silicones, they are easier to make and hence widely used.…”