Preparation method of polyphosphazene polymer microspheres
A technology of polymer microspheres and polyphosphazene is applied in the field of functional materials to achieve the effects of wide application prospect, convenient operation and simple reaction process
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[0015] Example 1
[0016] (1) Add 50 mL of acetonitrile, 0.1 g of 4,4'-dihydroxydiphenyl sulfone, 0.18 g of bisphenol AF and 0.5 mL of triethylamine into a three-necked flask, and heat at 90 o C, stirring at 200 r / min, condensing and refluxing;
[0017] (2) Add 0.2 g of hexachlorotrimeric phosphazene into the three-necked flask in step (1), stir, condense and reflux, and react for 1 h;
[0018] (3) The product of step (2) was cooled to room temperature, then centrifuged, washed with acetone, ethanol and distilled water, and finally dried in vacuum for 24 h.
[0019] The particle size of the prepared polyphosphazene microspheres was 500 nm.
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[0020] Example 2
[0021] (1) Add 50 mL of acetone-acetonitrile mixed solution (the volume ratio of acetone and acetonitrile is 1:1), 0.13 g of 4,4'-dihydroxydiphenyl sulfone, 0.1 g of bisphenol AF and 1.0 mL of trioctyl Amine, heating temperature is 20 o C, stirring at 200 r / min, condensing to reflux;
[0022] (2) Add 0.3 g of hexachlorotrimeric phosphazene into the three-necked flask in step (1), stir, condense and reflux, and react for 3 h;
[0023] (3) The product of step (2) was cooled to room temperature, then centrifuged, washed with acetone, ethanol and distilled water, and finally dried in vacuum for 24 h.
[0024] The prepared polyphosphazene microspheres had a particle size of 1.5 µm
Example Embodiment
[0025] Example 3
[0026] (1) Add 50 mL of acetone solution, 0.25 g of 4,4'-dihydroxydiphenyl sulfone, 0.05 g of bisphenol AF and 1.5 mL of trioctylamine into a three-necked flask, and heat at 50 o C, stirring at 200 r / min, condensing and refluxing;
[0027] (2) Add 0.2 g of hexachlorotrimeric phosphazene into the three-necked flask in step (1), stir, condense and reflux, and react for 4 h;
[0028] (3) The product of step (2) was cooled to room temperature, then centrifuged, washed with acetone, ethanol and distilled water, and finally dried in vacuum for 24 h.
[0029] The particle size of the prepared polyphosphazene microspheres was 2.7 µm.
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