Dendritic/hyperbranched polymers, intermediates and methods for their preparation

Abstract

The invention relates to a dendritic / hyperbranched polymer and a preparation method thereof. The structural formula of the polymer is as shown in a figure in the specification, wherein R in the chemical structural formula is a bromine or chlorine group. The preparation method comprises the steps of: firstly, synthesizing a monomer which contains a polyamide-amine (PAMAM) dendritic structural unitand can perform self-condensing vinyl polymerization, and obtaining the hyperbranched polymer containing the polyamide-amine dendritic structural unit by the self-condensing vinyl polymerization method. Because the polymer contains the polyamide-amine dendritic structural unit (DendronUnit) and also is a hyperbranched polymer, the polymer has wide application prospects in the aspects of coatings,surfactants, biomedical carriers, catalysis and the like. In the structural formula, the ring represents the polyamide-amine dendritic structural unit, and R represents Br or Cl.

Description

technical field [0001] The invention relates to a dendritic / hyperbranched functional polymer and a preparation method thereof. Background technique [0002] Dendritic polymers and hyperbranched polymers are a class of polymers with highly branched three-dimensional ellipsoidal structures and a large number of terminal functional groups. Compared with traditional linear polymers, dendritic polymers and hyperbranched polymers have lower viscosity and good solubility, which makes these polymers widely used in coatings, surfactants, biomedical carriers, catalysis, etc. The application prospect is broad. [0003] Currently, there are generally two methods for synthesizing dendrimers: "divergent method" and "convergent method". The "divergence method" is a divergent synthesis method from the inside to the outside through processes such as protection, reaction, and deprotection, starting from the central core of the dendritic polymer. The "convergence method" is a method of grad...

AI Technical Summary

Problems solved by technology

The method of synthesizing hyperbranched polymer usually has AB 2 Type monomer polymerization method and self-condensation vinyl polymerization method. These two methods are to first synthesize monomers that can be polymerized into hyperbranched polymers, and then obtain corresponding polymers through one-step polymerization. The synthesis steps are simple and fast. The process is relatively easy to industrialize, but the synthesized polymers are irregular and have large defects

Dendritic polymers have to go through multi-step reactions to obtain the target polymer, which is cumbersome and time-consuming, but the structure of the polymer is precise, and it is highly branched and highly geometrically symmetrical.

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