A polymer microsphere
A polymer and microsphere technology, which is applied in the preparation of microspheres, microcapsule preparations, etc., can solve the problems of low epoxy group content, poor mechanical properties, and reduced mechanical properties, and achieve high mechanical strength, strong impact resistance, The effect of uniform particle size
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[0024] Example one:
[0025] This embodiment provides a method for preparing polymer microspheres, which includes the following steps:
[0026] 1. Surface bond and initiator molecule of microsphere
[0027] Combine monodisperse polystyrene-divinyl phenyl spheres with a crosslinking degree of 80% and a particle size of 10 microns with a-halogenated acid halide, catalyst (the molar ratio of catalyst to α-halogenated acid halide is 1:1) Mix with an appropriate amount of solvent and stir for 24 hours at a temperature of 40°C to obtain microspheres with surface bonds and initiator molecules.
[0028] In this embodiment, the α-halo acid halide can be α-bromobutyryl bromide, α-bromoisobutyryl bromide, α-bromopropionyl bromide, α-chlorobutyryl bromide, and α-chloride. One of isobutyryl bromide or α-chloropropionyl bromide. Catalyst can choose FeCl 3 , SnCl 4 , BF 3 , ZnCl 2 Or one of AlCl. The solvent can be selected from dichloromethane, 1,2-dichloroethane, carbon disulfide or nitrobenzen...
Example Embodiment
[0041] Embodiment two:
[0042] This embodiment provides a method for preparing polymer microspheres, which includes the following steps:
[0043] 1. Using Friedel-Crafts acylation reaction to prepare microspheres with surface bonds and initiator molecules
[0044] Add 8g of raw material microspheres into a dry 250ml two-necked flask. The microspheres are monodisperse polystyrene-divinylbenzene microspheres with a crosslinking degree of 60% and a particle size of 20 microns, and then add solvents 1, 2 -46ml of dichloroethane, slowly add 21.76g of anhydrous aluminum trichloride under magnetic stirring, and then add 7.2ml of acylation reagent chloropropionyl chloride dropwise, and then react for 24 hours at a temperature of 30°C. 4ml of concentrated hydrochloric acid and 144g of crushed ice were added to the reacted system, stirred for 20 minutes, filtered with suction, and washed with water, ethanol, and acetone several times, respectively. Perform surface element analysis on the ob...
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