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A kind of water-soluble multi-block copolymer and preparation method thereof

A multi-block copolymer, water-soluble technology, applied in the field of polymer materials, can solve the problems of difficult practical application of block copolymers, narrow molecular weight distribution, etc., achieve excellent water solubility, narrow molecular weight distribution, and broaden application prospects Effect

Inactive Publication Date: 2018-06-12
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes it difficult to blindly pursue block copolymers with controllable molecular weight, narrow molecular weight distribution and designable structure.

Method used

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  • A kind of water-soluble multi-block copolymer and preparation method thereof
  • A kind of water-soluble multi-block copolymer and preparation method thereof
  • A kind of water-soluble multi-block copolymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] A kind of water-soluble multi-block copolymer, it is B-A-B type tri-block copolymer, with toluene diisocyanate (TDI), molecular weight M n The polyurethane block synthesized by polytetrahydrofuran of 1000 is a polyurethane segment A in the middle block, and the chains on both sides are composed of polyhydroxyethyl methacrylate segment B, which can be recorded as B x -A-B x , whose structural formula is as follows, and the molecular weight M is determined by gel chromatography n is 12656, the molecular weight distribution index PDI is 1.28, and n is an integer within (10-50), and x is an integer within (50-100).

[0058]

[0059] A water-soluble multi-block copolymer, which is a C-B-A-B-C type five-block copolymer, consists of a middle block polyurethane segment A (based on toluene diisocyanate (TDI), molecular weight M n Polyurethane block synthesized by polytetrahydrofuran of 1000), the chains on both sides are composed of polyhydroxyethyl methacrylate segment B a...

Embodiment 2

[0075] A kind of water-soluble multi-block copolymer, it is B-A-B type tri-block copolymer, with hexamethylene diisocyanate (HDI), molecular weight M n The polyurethane block synthesized by polytetrahydrofuran of 1000 is a polyurethane segment A in the middle block, and the chains on both sides are composed of polyhydroxyethyl methacrylate segment B. The general structural formula is as follows, and it is carried out by gel chromatography Determination of molecular weight M n is 13500, the molecular weight distribution index PDI is 1.32, and n is an integer within (10-50), and x is an integer within (50-100).

[0076]

[0077] A water-soluble multi-block copolymer, which is a C-B-A-B-C type five-block copolymer, consists of a middle block polyurethane segment A (in the form of hexamethylene diisocyanate (HDI), molecular weight M n Polyurethane block synthesized by polytetrahydrofuran of 1000), the chains on both sides are composed of polyhydroxyethyl methacrylate segment B...

Embodiment 3

[0091] A kind of water-soluble multi-block copolymer, it is B-A-B type tri-block copolymer, with toluene diisocyanate (TDI), molecular weight M n The polyurethane block synthesized by polytetrahydrofuran of 1000 is a polyurethane segment A in the middle block, and the chains on both sides are composed of polyhydroxyethyl methacrylate segment B. The general structural formula is as follows, and it is carried out by gel chromatography Determination of molecular weight M n is 10600, the molecular weight distribution index PDI is 1.59, and n is an integer within (10-50), and x is an integer within (50-100).

[0092]

[0093] A water-soluble multi-block copolymer, which is a C-B-A-B-C type five-block copolymer, consists of a middle block polyurethane segment A (based on toluene diisocyanate (TDI), molecular weight M n Polyurethane block synthesized by polytetrahydrofuran of 1000), the chains on both sides are composed of polyhydroxyethyl methacrylate segment B and polyglucosami...

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Abstract

The invention discloses a water-soluble multi-block copolymer which is a three-block copolymer. A middle block is a polyurethane chain section A and two side chains are composed of poly-hydroxyethyl methacrylate chain sections B; or the water-soluble multi-block copolymer is a five-block copolymer, a middle block is a polyurethane chain section A, and two side chains are sequentially composed of poly-hydroxyethyl methacrylate chain sections B and poly-glucose amino methacrylate chain sections B. The copolymer is clear in structure, controllable in molecular weight and narrow in molecular weight distribution, the number of blocks is creatively increased, novel methacrylate monomers are added, the number of hydroxyls is greatly increased, water solubility of the multi-block copolymer is substantially improved, heavy metal ions can be effectively adsorbed when the three-block copolymer or the five-block copolymer is used, stability of a dispersion system formed by the multi-block copolymer is high, and the dispersion system can be stored for a long time and will not settle for a year.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a water-soluble multi-block copolymer and a preparation method thereof. Background technique [0002] Since the first example of polymer synthesis at the beginning of this century, polymer chemists have been working hard to find a method to prepare polymer materials with clear molecular structure, controllable molecular weight and narrow molecular weight distribution. In 1956, Szwarc proposed the concept of living polymerization and living polymer. At that time, the living polymerization he defined was a chain polymerization process of irreversible chain transfer and chain termination. In the following 30 years, monomers were limited to anionic polymerization. In the 1960s and 1970s In the 1990s, the ring-opening polymerization of heterocyclic monomers was carried out, and in the late 1980s and early 1990s, a situation of vigorous development of chain living polymeriz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F293/00C08F220/28C08F220/36C08G18/83C08G18/48
CPCC08F220/28C08F220/281C08F220/36C08F293/005C08F2438/01C08G18/4854C08G18/831
Inventor 郑化廖健洪易英
Owner WUHAN UNIV OF TECH
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