Synthesis and characterizations of a vinyl-terminated benzoxazine monomer and its blending with polyhedral oligomeric silsesquioxane (POSS)

Thermally curable main-chain benzoxazine prepolymers via polycondensation route

“…Similar improvement in the thermal stability was also reported polyhedral oligomeric silsesquioxane (POSS) and polybenzoxazine composites [63][64][65][66]. In a following study, we have described the chain extension of main chain benzoxazine-siloxane oligomers by cyclic siloxanes in the presence of tetrabutylammonium hydroxide (TBAH) as catalyst through the anionic polymerization route.…”

Polyhedral Oligomeric Silsesquioxane (POSS) Nanoscale Reinforcement of Thermosetting Resin from Benzoxazine and Bisoxazoline

“…Moreover, the nanometer-scaled dispersion of POSS cages in the matrix is also an important factor that contributes to the enhanced thermal stability since the mass loss from segmental decomposition via gaseous fragments can be suppressed by well-dispersed POSS cubes at the molecular level. As described in previous papers, [19,20] these POSScontaining composite materials display reinforcement in their thermal properties relative to the pristine PBZ matrix. However, compared with the results of the earlier work on this system, it is found that the inclusion of PBO as a compatibilizer leads to a greater improvement of the properties of the POSS-containing PBZ.…”

“…[9][10][11][12][13][14][15][16][17][18] Most previous studies have been concerned with common polymers, and few concern the modification of PBZ with POSS. Lee et al [19,20] reported the synthesis and properties of a benzoxazine-containing POSS (BZ-POSS) monomer, Summary: The reaction between octaaminophenyl polyhedral oligomeric silsesquioxane (OAPS) and 2,2 0 -(1,3-phenylene)-bis(4,5-dihydro-oxazoles) (PBO) over different temperature ranges was confirmed by FT-IR spectroscopy. The OAPS was used to modify benzoxazine (BZ) in the presence of PBO.…”

Electric field dependence of thermal activation energy in poly(4TBU)/poly(methyl)methacrylate blend

“…The organic semiconductor studied here belong to class of polybenzoxazines and was synthesized using a cationic ring opening polymerization [4], [5]. To achieve better stability, as evident from the DSC (Differential Scanning Calorimetry) and TGA (Thermo Gravimetric Analysis) studies, a 1:1 blend of poly(4TBU) and poly(methyl)methacrylate was used.…”