High molecule nano ball and its preparing method of quasi-critical polymerization
A nanosphere and polymer technology, applied in the field of polymer nanosphere and its quasi-critical polymerization preparation, to achieve the effect of a single product component
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[0016]The polymer nanosphere of the present invention, the polymer nanosphere is formed by the polymerization of organic monomers, has a diameter of a nanoscale polymer sphere, has a regular appearance, has a single component and has a highly loose polymer segment and high swelling active. The quasi-critical polymerization preparation method of the polymer nanosphere of the present invention is: mixing the medium phase and the dispersed phase solvent to prepare the total medium phase; the volume percentage of the dispersed phase and the total medium phase is 0-100%, and the dispersed phase and the medium phase Composed of one or more substances; the prepared monomer phase includes: (1) reactive monoene monomers, initiators or catalysts, under which conditions linear high molecular nanospheres or linear high molecular polymers can be prepared; such as reactive single When the olefinic monomer contains two or more monomers, copolymerized polymer nanospheres or copolymerized poly...
Embodiment 1
[0021] Example 1: Preparation of macromolecule cross-linked nanosphere polymer.
[0022] In a 500ml reactor, add 22ml of ethanol and 150ml of water, make it mix, under nitrogen protection and ultrasonic stirring, add dropwise the organic monomer phase solution prepared in advance, such as 9.6g of styrene (St), 0.4g The divinylbenzene (DVB, content is 50%), the benzoyl peroxide (BPO) of 0.2g. Stand at room temperature for 24 hours, seal the reaction system, raise the temperature to 70° C. and react for 24 hours to obtain cross-linked polystyrene nanospheres. Ethanol was distilled off under reduced pressure to obtain an aqueous solution of spheres. The water was further distilled off under reduced pressure to obtain about 10 g of cross-linked polystyrene product. The polymer was observed by a transmission electron microscope as a sphere with a diameter of about 50 nanometers and a regular shape. It is dissolved in tetrahydrofuran (THF), and its swollen state diameter is about...
Embodiment 2
[0024] Example 2: Preparation of macromolecule cross-linked nanosphere polymer.
[0025] In a 500ml reactor, add 200ml tetrahydrofuran (THF) and 150ml water, make it mix, and under nitrogen protection and stirring with an emulsifier, add a pre-prepared organic monomer phase solution dropwise, such as 8.2g of vinyl acetate , 1.6 g of divinylbenzene (DVB, content 50%), 0.2 g of azobisisobutyronitrile (AIBN). Stand at room temperature for 24 hours, seal the reaction system, raise the temperature to 70° C. and react for 24 hours to obtain cross-linked polyvinyl acetate nanospheres. THF was distilled off under reduced pressure to obtain an aqueous solution of spheres. The water was further distilled off under reduced pressure to obtain about 10 g of cross-linked polyvinyl acetate product. The polymer was observed by a transmission electron microscope as a sphere with a diameter of about 50 nanometers and a regular shape. Dissolve it in THF, its swollen state diameter is about 54...
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