A kind of method utilizing soap-free emulsion polymerization to prepare PMMA microspheres

A soap-free emulsion polymerization and microsphere technology, applied in the field of polymer chemistry, can solve the problems of reducing film water resistance, emulsifier migration, reducing surface energy, etc., and achieve the effect of improving adhesion performance, improving mechanical properties, and eliminating pollution
CN103342768BActive Publication Date: 2015-11-11KUNMING UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
KUNMING UNIV OF SCI & TECH
Publication Date
2015-11-11

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Abstract

The invention provides a method for preparing a PMMA (Polymethyl Methacrylate) microsphere with a core-shell structure through soap-free emulsion polymerization, and belongs to the technical field of high polymer chemistry. The method comprises the following steps of: carrying out reduced pressure distillation on an MMA (Methyl Methacrylate) monomer to obtain a fresh monomer; uniformly mixing the MMA monomer and water, heating in a water bath, then, adding a water-soluble initiator, and reacting while stirring under the condition of the water bath to obtain a colloid emulsion; filtering to remove impurities and conglobated macromolecular substances in the colloid emulsion; then, carrying out centrifugal separation, and drying the obtained solid product at constant temperature to obtain the PMMA microsphere with the core-shell structure. By using a soap-free emulsion, the affect from a micromolecular emulsifying agent is eliminated, and the physical-chemical, mechanical and adhesive properties of a polymer are improved; a defoaming agent is not used basically in the preparation process, so that the pollution of the emulsifying agent to the environment is eliminated; the microsphere with monodispersity and a clean surface can be prepared, and the microsphere is uniform in particle size and has the core-shell structure.
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Description

technical field

[0001] The invention relates to a method for synthesizing organic polymer PMMA microsphere particles, belonging to the technical field of polymer chemistry. Background technique

[0002] With the application of emulsion polymerization technology in many fields of industry today, emulsion polymerization has become one of the main methods for the production of synthetic rubber, synthetic resins, coatings, adhesives, etc. Every year, tens of millions of polymers are produced by emulsion polymerization in the world ton meter. Although the emulsifier is used in a small amount in the emulsion polymerization system, it plays an important role. The emulsifier stabilizes the emulsion before and after polymerization, guides monomers to polymerize according to the micellar mechanism during polymerization, and affects the polymerization rate, number of latex particles, particle size, and distribution. However, after polymerization, the emulsifier adsorbed on the surfac...

Claims

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