One question per week: Popularizing knowledge about polymers – What are the methods of polymerization?
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As we all know, polymer materials differ in their polymerization methods depending on their structure. Please feel free to share your thoughts – what are the various polymerization methods for polymer materials? Of course, it’s better to provide examples. Requirements: 1. All replies must be hidden; the best answer will be announced on the first floor after the event ends. 2. The scoring method remains unchanged. 3. For items that are not hidden, please refer to the image below. 4. All hidden content must be filled in; it will only be displayed when the viewer’s score is above 4000 points. 4. Please note that items that are not hidden will not earn any points; for more details on those that are not hidden, please visit http://bbs.hcbbs.com/thread-520233-1-1.html
This post was last edited by QXZ-1966 on 2009-8-11 at 21:46. Among the various polymerization methods used in polymers, free radical polymerization has always played a dominant role; it includes four types: bulk polymerization, solution polymerization, suspension polymerization, and emulsion polymerization. Furthermore, there is ion polymerization, which includes anionic polymerization and cationic polymerization; the polymerization methods involve solution polymerization and slurry polymerization. Then there is step-growth polymerization, which includes melt polymerization, solution polymerization, and interfacial polymerization. Among free radical polymerizations, the mechanism of emulsion polymerization has received considerable attention in recent years; its mechanism is somewhat more complex than that of other free radical mechanisms. It mainly includes issues such as the migration of monomers, the use of dispersants, and nucleation methods
Body... solution... emulsion... suspension... just these 4 types... PS: The hidden settings for LS are incorrect...
I. Classification according to changes in the structural composition of monomers and polymers: 1. Addition polymerization. For example, vinyl chloride is polymerized to form PVC. 2. Polycondensation reaction. PET is produced by the polycondensation of terephthalic acid and ethylene glycol. II. Classification by polymerization mechanism: 1. Chain polymerization. A. Radical polymerization. a. Bulk polymerization. PMMA is produced by batch bulk polymerization of methyl methacrylate. b. Solution polymerization. PAN is produced by continuous solution polymerization of acrylonitrile. c. Suspension polymerization. Styrene suspension polymerization yields PS. d. Emulsion polymerization. Production of ABS by emulsion polymerization B. Ionic polymerization. a. Cationic polymerization. Polyoxymethylene. b. Anionic polymerization. Polyisoprene. C. Coordination polymerization. Isopropylene polymer. 2. Stepwise polymerization. Most polycondensation reactions are types of step-growth polymerization, such as polyamides and polyesters.
There are mainly two categories: addition polymerization and condensation polymerization
1. Bulk polymerization 2. Solution polymerization 3. Emulsion polymerization 4. Suspension polymerization
There are mainly the following four types: 1. Suspension polymerization, 2. Emulsion polymerization, 3. Bulk polymerization, 4. Solution polymerization. There are many details, and typing them all would be cumbersome; the key factors involve the initiator as well as the different ways in which reactions take place within the dispersion system. The choice of polymerization method depends on the properties of the monomers.
1. Suspension polymerization 2. Emulsion polymerization 3. Bulk polymerization 4. Solution polymerization
Free radical polymerization, coordination polymerization, anionic polymerization, cationic polymerization
Chain polymerization includes bulk polymerization, emulsion polymerization, suspension polymerization, and solution polymerization. Stepwise polymerization includes melt polymerization, solution polymerization, solid-state polymerization, and interfacial polymerization.