A kind of degradable monodisperse polymer microsphere and its preparation method and application
A polymer and monodisperse technology, applied in chemical instruments and methods, medical preparations of non-active ingredients, organic compound/hydride/coordination complex catalysts, etc., can solve the problems of complex polymerization system and reduced product purity
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Embodiment 1
[0035] 2,3,5,6,2′,3′,5′,6′-octafluoro-4,4′-divinyl-1,1′diphenyl diselenide (FVPDSe, 0.2722 mmol, 0.1383 g), styrene (0.0681 mmol, 0.0071 g) and anhydrous acetonitrile (20 mL) were added into a round bottom flask. After the reaction solution was passed through argon gas for deoxygenation for 15 minutes, the reaction bottle was sealed and placed under LED blue light to react for 24 hours. After the reaction was completed, it was centrifuged, and the reaction product was washed with ethanol several times, and then vacuum-dried at 40°C until constant weight (product rate of 18%). The scanning electron micrographs of the obtained polymer microspheres are shown in figure 1 (number average diameter D n = 1.29µ, particle size polydispersity index U = 1.05); while ethanol only obtains agglomerates, and petroleum ether does not react.
Embodiment 2
[0037]Add FVPDSe (0.6534 mmol, 0.3320 g), styrene (0.1635 mmol, 0.0170 g) and anhydrous acetonitrile (20 mL) into a round bottom flask. After the reaction solution was passed through argon gas for deoxygenation for 15 minutes, the reaction bottle was sealed and placed under LED blue light to react for 24 hours. After the reaction was completed, it was centrifuged, and the reaction product was washed with ethanol several times, and then vacuum-dried at 40°C until constant weight (product rate of 13%). The scanning electron micrographs of the obtained polymer microspheres are shown in figure 2 (number average diameter D n = 1.71µ, particle size polydispersity index U = 1.05).
Embodiment 3
[0039] FVPDSe (0.4356mmol, 0.2213g), styrene (0.1090mmol, 0.0113g) and anhydrous acetonitrile (20mL) were added to a round bottom flask. After the reaction solution was passed through argon gas to deoxygenate for 15 minutes, the reaction bottle was sealed and placed under LED blue light to react for 12 hours. After the reaction was completed, it was centrifuged, and the reaction product was washed with ethanol several times, and then vacuum-dried at 40°C until constant weight (product rate of 22%). The scanning electron micrographs of the obtained polymer microspheres are shown in image 3 (number average diameter D n = 0.55µ, particle size polydispersity index U = 1.14).
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