A method of atom transfer radical polymerization grafted polymer on the surface of explosives
An atom transfer and free radical technology, applied in the direction of aromatic nitration composition, etc., can solve the problem that the surface structure is difficult to control effectively, and achieve the effect that the surface structure can be adjusted and the surface properties are easy
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Embodiment 1
[0029] (1) Functional group pre-modification: Add 100.0 g of explosives to 2 L of dopamine hydrochloride aqueous solution with a concentration of 2.5 g / L and a pH of 9.0, stir at a rate of 350 rpm for 3 h, then suction filter and dry in vacuum;
[0030] (2) Initiator reaction: Add 50.0 g of the explosive obtained in step (1) to 100 mL of a mixture of n-hexane and pyridine at a volume ratio of 1:1, disperse by ultrasonication for 2 minutes, stir at a rate of 450 rpm, and slowly add 5.0 g of atomic Transfer the free radical polymerization initiator bromoisobutyryl bromide, pass through dry Ar, stir at room temperature for 2h, filter with suction, and rinse with ethanol / water with a volume ratio of 1:1, and dry with Ar purging;
[0031] (3) Catalyst solution preparation: After adding 10.0 g of catalyst ligand PMDETA to 20.0 g of absolute ethanol and mixing, pass through Ar purge, under the protection of Ar, add 0.1 g of catalyst CuBr, and ultrasonically obtain a catalyst solution;...
Embodiment 2
[0034] (1) Functional group pre-modification: add 100 g of explosives to 2 L of dopamine hydrochloride aqueous solution with a concentration of 2.5 g / L and a pH of about 9.0, stir at a rate of 450 rpm for 3 h, then suction filter and dry in vacuum;
[0035] (2) Initiator reaction: Add 100.0 g of the explosive obtained in step (1) to 100 mL of a mixture of n-hexane and pyridine with a volume ratio of 1:1, disperse by ultrasonication for 1 min, stir at a rate of 450 rpm, and slowly add 2.0 g of atomic Transfer the free radical polymerization initiator bromoisobutyryl bromide, pass through dry Ar, stir at room temperature for 1 h, filter with suction, and rinse with ethanol / water with a volume ratio of 1:1, and dry with Ar purging;
[0036] (3) Catalyst solution preparation: After adding 5.0 g of catalyst ligand PMDETA to 50.0 g of absolute ethanol and mixing, pass through Ar purge, under the protection of Ar, add 0.1 g of catalyst CuBr, and sonicate to obtain a catalyst solution;...
Embodiment 3
[0039] (1) Functional group pre-modification: add 100.0 g of explosives to 2 L of dopamine hydrochloride aqueous solution with a concentration of 2.5 g / L and a pH of about 9.0, stir at a rate of 450 rpm for 3 h, filter with suction, and dry in vacuum;
[0040] (2) Initiator reaction: Add 100.0 g of the explosive obtained in step (1) to 100 mL of a mixture of n-hexane and pyridine at a volume ratio of 1:1, disperse by ultrasonication for 1 min, stir at a rate of 450 rpm, and slowly add 5.0 g of atomic Transfer the free radical polymerization initiator bromopropylacyl bromide, pass through dry Ar, stir at room temperature for 1 h, filter with suction, and rinse with ethanol / water with a volume ratio of 1:1, and dry with Ar purging;
[0041] (3) Catalyst solution preparation: After adding 37.5g of catalyst ligand PMDETA to 150.0g of absolute ethanol and mixing, pass through Ar to purge, under the protection of Ar, add 0.5g of catalyst CuBr, and ultrasonically obtain the catalyst s...
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