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Liquid crystal block copolymer elastomer with self-healing performance and preparation method thereof

A technology of block copolymers and elastomers, which is applied in the field of liquid crystal block copolymers and its preparation, can solve the problems of material performance degradation, influence of polymer material mechanical properties, etc., and achieve the effect of improving material fatigue

Inactive Publication Date: 2015-03-25
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, local micro-damages are easy to occur during its molding, processing and use. If these micro-damages cannot be repaired in time, they will have an impact on the mechanical properties of the polymer material, which will lead to the deterioration of the material properties.

Method used

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  • Liquid crystal block copolymer elastomer with self-healing performance and preparation method thereof
  • Liquid crystal block copolymer elastomer with self-healing performance and preparation method thereof
  • Liquid crystal block copolymer elastomer with self-healing performance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A liquid crystal block copolymer elastomer with self-healing properties, its structural formula is:

[0046]

[0047] A method for preparing a liquid crystal block copolymer elastomer with self-healing properties;

[0048] Raw materials: Potassium nitrite, phenol, hydrochloric acid, sodium hydroxide, 1,6-dibromohexane, methacrylic acid, p-butylaniline, tetrahydrofuran (THF), chlorobenzene, toluene

[0049] Liquid crystal monomer 1 with double bond: 6-[4-(4-phenoxy)-p-butylazobenzene]hexyl methacrylate

[0050] Monomer 2 with double bond and hydrogen bond group: (5-Acetamidopentanol) methacrylate

[0051] Initiator: Azobisisobutyronitrile (AIBN)

[0052] Chain transfer agent: Dibenzoyl persulfide (CPDB)

[0053]The liquid crystal monomer 1 (1g, 2.4mmol) containing the double bond, the chain transfer agent CPDB (0.01g, 0.045mmol) and the initiator AIBN (0.0016g, 0.01mmol) were sequentially added to a test tube equipped with a magneton, and tetrahydrofuran was added ...

Embodiment 2

[0057] A liquid crystal block copolymer elastomer with self-healing properties, its structural formula is:

[0058]

[0059] Raw materials: Potassium nitrite, phenol, hydrochloric acid, sodium hydroxide, 1,6-dibromohexane, methacrylic acid, p-butylaniline, tetrahydrofuran (THF), chlorobenzene, toluene

[0060] Liquid crystal monomer 1 with double bond: 6-[4-(4-phenoxy)-p-butylazobenzene]hexyl methacrylate

[0061] Monomer 2 with double bond and hydrogen bond group: (5-Acetamidopentanol) methacrylate

[0062] Initiator: Azobisisoheptanonitrile (ABVN)

[0063] Chain transfer agent: Dibenzoylsulfonyl persulfide (CPDB)

[0064] Plasticizer: Hexyl Methacrylate

[0065] Liquid crystal monomer 1 (1g, 2.4mmol), chain transfer agent (0.01g, 0.045mmol), plasticizer (0.2g, 1.5mmol) and initiator ABVN (0.0025g, 0.01mmol) were sequentially added to a magnetic In the sub-test tube, add THF 2ml as a solvent, after three times of freezing-pumping-thawing, the tube is sealed under vacuu...

Embodiment 3

[0069] A liquid crystal block copolymer elastomer with self-healing properties, the structural formula of which is shown in formula VII.

[0070] Raw materials: potassium nitrite, cuprous bromide, phenol, hydrochloric acid, sodium hydroxide, 1,6-dibromohexane, methacrylic acid, p-butylaniline, tetrahydrofuran (THF), chlorobenzene, toluene

[0071] Liquid crystal monomer 1 with double bond: 6-[4-(4-phenoxy)-p-butylazobenzene]hexyl methacrylate

[0072] Monomer 2 with double bond and hydrogen bond group: (5-Acetamidopentanol) methacrylate

[0073] Initiator: ethyl α-bromoisobutyrate

[0074] Ligand: Pentamethyldiethylenetriamine (PMDETA)

[0075] Plasticizer: Hexyl Methacrylate

[0076] Liquid crystal monomer 1 (1g, 2.4mmol), plasticizer (0.2g, 1.5mmol), initiator α-bromoisobutyrate ethyl (0.009g, 0.045mmol), ligand PMDETA (0.008g, 0.045 mmol) and cuprous bromide (0.006g, 0.045mmol) were sequentially added into a test tube equipped with a magneton, and 2ml of THF was added a...

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Abstract

The invention discloses a liquid crystal block copolymer elastomer with self-healing performance and a preparation method thereof. The liquid crystal block copolymer elastomer is rigid due to liquid crystal groups in a side chain, so as to have the characteristics of thermotropic liquid crystal properties; meanwhile the liquid crystal block copolymer elastomer also has the property of the copolymer due to crosslinking of a low-molecular flexible chain and a hydrogen bond so as to show the property of the self-healing elastomer on a macro-scale. As the liquid crystal self-healing elastomer with is rigid as well as elastic, the properties are determined by the structure, and application is determined by the properties, so that the block copolymer has unique application in industry, meanwhile can replace many current products, can improve phenomena such as breaking of an automobile tire, failure of a sealing ring or crack or fatigue of materials of a free-vibration plastic chair, and thereby produces great impact on our life.

Description

technical field [0001] The invention relates to a liquid crystal block copolymer and a preparation method thereof, belonging to the technical field of functional polymer materials. Background technique [0002] Liquid crystal elastomers have the dual characteristics of elastomers and liquid crystals (elasticity, order and fluidity), not only retaining the properties of the original non-crosslinked liquid crystal polymers, but also due to excellent soft elasticity, ferroelectricity, piezoelectricity Properties, optical nonlinearity, shape memory properties, light-induced or thermal-induced strain properties, etc., have become very active fields in the research of polymer materials. According to the position of mesogens in the polymer chain, liquid crystal elastomers can be divided into three categories, namely main chain liquid crystal elastomers (MC-LCEs), side chain liquid crystal elastomers (SC-LCEs) and mixed type liquid crystal elastomer. Among them, side chain liquid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F293/00C09K19/38
Inventor 谢鹤楼晏苗钟冠群张海良
Owner XIANGTAN UNIV
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