Benzoxazine siloxanes as modifiers of epoxy resins for coatings

Tribological properties of bismaleimide reinforced with Si-containing benzoxazine monomer

“…The 1 H-NMR, 13 C-NMR, and 29 Si-NMR profiles of Si-BOZ are illustrated in Figures 4, 5, and 6, respectively. The two characteristic singlets at 3.70 ppm (H1) and 5.01 ppm (H6) in the 1 H-NMR profile were assigned to the resonance of the oxazine ring protons (Figure 4).…”

“…These results suggested that Si was present in the structure of Si-BOZ. The singlets at 52.8 and 85.2 ppm in the 13 C-NMR profile of Si-BOZ (Figure 5) were assigned to the N-C-Ar bonds and the N-C-O groups of the oxazine ring. The singlet at 92.1 ppm in the 29 Si-NMR profile of Si-BOZ (Figure 6) was assigned to the protons of Si in the Si-O-CH 2 groups.…”

“…Recently, numerous studies have focused on the remarkable effects of siloxane on the mechanical and thermal properties of polymers. 12,13 Because the Si-O bond possesses high dissociation energy, low rotation barrier energy, and high flexibility, 14 the incorporation of siloxane into polymers can endow polymers with high thermal stability, high pre-polymer flexibility, and excellent oxidation resistance. In addition, because Si presents a low surface energy, 15,16 it can migrate to the surface of the resins to form a carbon layer during thermal decomposition.…”

Tribological properties of bismaleimide alloy blend with a novel silicon dioxide-containing benzoxazine-monomer

“…Benzoxazine (BOZ) resin is a high-performance phenolic resin that can be obtained via a ring-opening reaction without any initiator and catalyst [17, 18], and exhibits outstanding properties, such as good mechanical properties, low water absorption, high-temperature stability, flame retardant, excellent chemical, and electrical resistance [17, 19, 20]. Furthermore, when blending with the BMI resin, the amine group from the ring-opening reaction of BOZ can further catalyse the reaction of BMI and form a more dense and uniform structure of the polymer alloys [19, 21, 22]. It can be predicted that when both the nano-SiO 2 and BOZ have been introduced into the BMI system, the advantages of organic and inorganic phases can endow BMI with excellent properties.…”

Synthesis of a benzoxazine monomer contained hyperbranched polysiloxane and the characteristics of its polymer alloys blend with bismaleimides

“…21,22 Moreover, when blending with bismaleimides (BMIs), the hydroxyl group can be produced by the ring opening process of BOZ monomer, which can further catalyze the reaction of BMI, thus, the BOZ/BMI copolymer with more dense and uniform structure. 23 –25…”