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Brush-like block copolymer with macromolecules at chain ends and preparation method thereof

A technology of block copolymers and macromolecules, which is applied in the field of brush-like block copolymers and its preparation, and can solve problems such as difficulties in physical methods

Inactive Publication Date: 2014-08-20
CHANGCHUN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some difficulties in physical methods to make satisfactory three-dimensional photonic crystals

Method used

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  • Brush-like block copolymer with macromolecules at chain ends and preparation method thereof
  • Brush-like block copolymer with macromolecules at chain ends and preparation method thereof
  • Brush-like block copolymer with macromolecules at chain ends and preparation method thereof

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Embodiment Construction

[0020] The chain end of the present invention has the brush block copolymer of macromolecule, it is characterized in that, the chemical expression of this block copolymer is (N-PMMA) y -b-(N-PS) x , with a number average molecular weight of 3×10 5 ~4×10 6 ; In the formula: x=y; N-PMMA is norbornene polymethyl methacrylate macromer, and its number average molecular weight is 6000, and structural formula is:

[0021]

[0022] N-PS is a norbornene polystyrene macromer with a number average molecular weight of 6000 and a structural formula of:

[0023]

[0024] The structural formula of the block copolymer is:

[0025]

[0026] The preparation method of the brush-like block copolymer with macromolecules at the chain end of the present invention will be described in detail.

[0027] In the first step, N-(hydroxyethyl)-cis-5-norbornene-exo-2,3-dicarboximide is synthesized by the dehydration reaction of acid anhydride and alcohol amine. The specific method is:

[0028]...

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Abstract

The invention relates to a brush-like block copolymer with macromolecules at chain ends and a preparation method thereof, belonging to the technical field of high-polymer crystalline materials. The block copolymer provided by the invention can form ordered nano-structure photon crystals by self-assembly, and has the characteristic of adjustable chemical and mechanical properties. The chemical expression of the block copolymer is (N-PMMA)y-b-(N-PS)x, and the molecular weight is 3*10<5>-4*10<6>; in the expression, x=y; N-PMMA is norbornene polymethyl methacrylate macromolecule monomer of which the number-average molecular weight is 6000; and N-PS is norbornene polystyrene macromolecule monomer of which the number-average molecular weight is 6000. The preparation method of the brush-like block copolymer is a ring-opening metathesis polymerization method; and the block copolymer prepared by the method has very low winding of the side chain, and can quickly form the ordered nano-structure photon crystals by self-assembly.

Description

technical field [0001] The invention relates to a brush-like block copolymer with macromolecules at the chain end and a preparation method thereof. Using the brush-like block copolymer can reduce the characteristic that the chains are entangled together, and can make it form an organic Ordered nanostructures are photonic crystals, which can reflect long-wavelength light with zero addition, and belong to the technical field of polymer crystal materials. Background technique [0002] Block polymers are formed by linking polymer segments of different chemical structures through chemical bonds, and are a type of polymer formed by linking two or more different polymer segments through covalent bonds. Among them, each sequence is called a block, because different polymer segments have different physical and chemical properties. Therefore, block copolymers exhibit special and excellent properties that many homopolymer polymers do not possess. Block copolymers can self-assemble in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/02
Inventor 段潜姚芬李艳辉陈水颖张丽秋
Owner CHANGCHUN UNIV OF SCI & TECH
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