Thermal restoring net-structured hydrogen bond supermolecule elastomeric polymer and preparation method thereof

A network structure and supramolecular technology, applied in the field of oligomers constituting the polymer, to achieve good thermal recovery, low cost, and large-scale production

Inactive Publication Date: 2011-05-04
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, such self-assembled supramolecular network structures of such small molecules are in fluid states, liquid crysta

Method used

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  • Thermal restoring net-structured hydrogen bond supermolecule elastomeric polymer and preparation method thereof
  • Thermal restoring net-structured hydrogen bond supermolecule elastomeric polymer and preparation method thereof
  • Thermal restoring net-structured hydrogen bond supermolecule elastomeric polymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Add ethylenediamine to the dimerized fatty acid A, under 200mL / min nitrogen atmosphere, magnetically stir, heat the oil bath to 180°C, condense and reflux for 8 hours, the ratio of dimerized fatty acid A to ethylenediamine is 1:1.2 ;

[0036] (2) Remove the condensation reflux device, heat at 160°C oil temperature for 7h, and at the same time pass 500mL / min nitrogen gas to take away the remaining unreacted ethylenediamine and water.

[0037] (3) Granulation and impurity removal: After the above reaction is stopped, pour the product on the release paper while it is hot. After the material was cooled to room temperature, the material was granulated into pieces with a thickness of 1 mm, soaked in a mixed solution of methanol / water (2:1 by volume) for 72 hours, and dried in a vacuum oven at 60°C for 72 hours after soaking to obtain final sample.

Embodiment 2

[0039](1) Add ethylenediamine to the dimerized fatty acid A, under 200mL / min nitrogen atmosphere, magnetically stir, heat the oil bath to 180°C, condense and reflux for 8 hours, the ratio of dimerized fatty acid A to ethylenediamine is 1:1.2 ;

[0040] (2) Remove the condensation reflux device, heat at 160°C oil temperature for 7h, and at the same time pass 500mL / min nitrogen gas to take away the remaining unreacted ethylenediamine and water.

[0041] (3) Synthesis of monoisocyanate-terminated amide oligomers: After removing diamine monomers, add a certain amount of terephthalic acid monoisocyanate, and heat the reaction mixture to 180°C in a nitrogen atmosphere of 200mL / min, and react for 4h , The ratio of dimer fatty acid to terephthalic acid monoisocyanate is 1:0.2.

[0042] (4) Granulation and impurity removal: After the above reaction is stopped, pour the product on the release paper while it is hot. After the material was cooled to room temperature, the material was gr...

Embodiment 3

[0044] (1) Add ethylenediamine to dimerized fatty acid B, under 200mL / min nitrogen atmosphere, magnetically stir, heat up the oil bath to 180°C, condense and reflux for 8 hours, the ratio of dimerized fatty acid A to ethylenediamine is 1:1.2 ;

[0045] (2) Remove the condensation reflux device, heat at 160°C oil temperature for 7h, and at the same time pass 500mL / min nitrogen gas to take away the remaining unreacted ethylenediamine and water.

[0046] (3) Synthesis of monoisocyanate-terminated amide oligomers: After removing diamine monomers, add a certain amount of terephthalic acid monoisocyanate, and heat the reaction mixture to 180°C in a nitrogen atmosphere of 200mL / min, and react for 4h , The ratio of dimer fatty acid to terephthalic acid monoisocyanate is 1:0.2.

[0047] (4) Granulation and impurity removal: After the above reaction is stopped, pour the product on the release paper while it is hot. After the material was cooled to room temperature, the material was gr...

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Abstract

The invention provides a polymer with the following hydrogen bond supermolecule net-structure, which has significant thermal restoring performance and good mechanical strength and elasticity, and facilitates the low temperature shaping process and cyclic utilization of the material. The synthesized oligomer is used as the skeleton of the hydrogen bond net-structured supermolecule polymer, and themain chain of the synthesized oligomer is provided with groups of hydrogen bond-forming factors such as carbonyl group (C=O), amino-group (-NH- or -NH2), sulfonyl group (O=S=O) and the like. Because the acting force of the hydrogen bond is much smaller than the force of the covalent bond, the length of the hydrogen bond is increased and the association speed is accelerated during the process of raising the temperature, so that the hydrogen bond supermolecule polymer has a lower melting point, thereby having better thermal restoring performance. In addition, though the single hydrogen bond force is smaller, the hydrogen bond supermolecule net-structure has good mechanical strength and elasticity due to the stable structure of the hydrogen bond supermolecule net-structure.

Description

technical field [0001] The invention belongs to the field of supramolecular material science, and in particular relates to a polymer with thermal recovery performance and elasticity formed through a multiple weak hydrogen bond supramolecular network structure, a preparation method thereof, and an oligomer constituting the polymer. technical background [0002] Supramolecular systems are entities or aggregates associated by non-covalent bonds such as hydrogen bonds, van der Waals forces, electrostatic attraction, П-П interactions, and hydrophobic interactions. Although the hydrogen bond between organic molecules is not the strongest non-covalent bond, its high orientation and diversity make the research of hydrogen bonded supramolecular polymers get people's high attention and attention. The single hydrogen bond energy is small and the binding constant is low, while the mutual superposition and synergy between multiple hydrogen bonds can have a strong binding energy effect, s...

Claims

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Application Information

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IPC IPC(8): C08G69/48C08G69/42C08G69/26C08J3/24
Inventor 吴唯陈玉洁王佳玮
Owner EAST CHINA UNIV OF SCI & TECH
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