Polymer microsphere and preparation method thereof
A polymer and microsphere technology, applied in the preparation of microspheres, microcapsule preparations, etc., can solve the problems of low epoxy group content, poor mechanical properties, reduced mechanical properties, etc., and achieve strong impact resistance, high mechanical strength, The effect of good stability
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Embodiment 1
[0025] This embodiment provides a method for preparing polymer microspheres, comprising the following steps:
[0026] 1. Microsphere surface bonds and initiator molecules
[0027] Monodisperse polystyrene-divinylphenyl spheres with a cross-linking degree of 80% and a particle size of 10 microns and α-haloacyl halide, catalyst (the molar ratio of catalyst to α-haloacyl halide is 1:1) and an appropriate amount of solvent, and stirred at 40° C. for 24 hours to obtain microspheres of surface bonds and initiator molecules.
[0028]In this example, the α-haloacyl halide can be selected from α-bromobutyryl bromide, α-bromoisobutyryl bromide, α-bromopropionyl bromide, α-chlorobutyryl bromide, α-chloro 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 one of dichloromethane, 1,2-dichloroethane, carbon disulfide or nitrobenzene.
[0029] 2. Grafting polyglycidyl methacrylat...
Embodiment 2
[0042] This embodiment provides a method for preparing polymer microspheres, comprising the following steps:
[0043] 1. Using Friedel-Crafts acylation reaction to prepare microspheres with surface bonds and initiator molecules
[0044] Add 8 g of raw material microspheres in a dry 250ml two-necked flask, the microspheres are polystyrene-divinylbenzene microspheres that are monodisperse, have a crosslinking degree of 60%, and a particle diameter of 20 microns, and then add solvent 1,2 - 46ml of dichloroethane, slowly add 21.76g of anhydrous aluminum trichloride under magnetic stirring, then dropwise add 7.2ml of acylating reagent chloropropionyl chloride, dropwise, and react at a temperature of 30°C for 24 hours. Add 4 ml of concentrated hydrochloric acid and 144 g of crushed ice to the reacted system, stir for 20 minutes, then filter with suction, and wash with water, ethanol, and acetone several times respectively. The obtained microspheres were subjected to surface element...
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