CN110885537A - Modified thermotropic liquid crystal polyester compound and processing method thereof - Google Patents
Modified thermotropic liquid crystal polyester compound and processing method thereof Download PDFInfo
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- CN110885537A CN110885537A CN201910558776.8A CN201910558776A CN110885537A CN 110885537 A CN110885537 A CN 110885537A CN 201910558776 A CN201910558776 A CN 201910558776A CN 110885537 A CN110885537 A CN 110885537A
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- liquid crystal
- crystal polyester
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
The invention provides a processing method of a modified thermotropic liquid crystal polyester compound. The method of the invention comprises the following steps: (1) preparing the graphene oxide subjected to ultrasonic treatment: suspending graphene in deionized water, fully stirring to obtain a suspension, carrying out ultrasonic treatment on the obtained suspension for 30-60 minutes, and drying; (2) taking 100 parts of liquid crystal polyester, 20-30 parts of ethylene-vinyl acetate copolymer and 5-10 parts of dibutyl phthalate according to parts by weight, heating to 320-45 ℃, melting and stirring, then adding 0.05-0.25 part of graphene oxide prepared in the step (1), uniformly mixing, extruding, granulating and drying. The invention can effectively improve the toughness of the liquid crystal polyester without reducing the strength and the heat resistance of the liquid crystal polyester.
Description
The technical field is as follows:
the invention relates to a modified thermotropic liquid crystal polyester compound and a processing method thereof, belonging to the technical field of organic chemistry.
Background art:
the liquid crystal polyester is a polyester resin capable of forming a liquid crystal state under certain conditions. Has a main chain liquid crystal polyester and a side chain liquid crystal polyester. The main varieties are polyacrylic acid (aryl) ester, polymethacrylic acid (aryl) ester, poly-p-hydroxybenzoate, aromatic polyester (homopolymer or copolymer), and the like. Has the characteristics of high strength, good thermal stability and good chemical stability. Prepared by condensation polymerization of dibasic acid or diacid chloride and dihydric phenol or dihydric alcohol. The method is mainly used for the aspects of electronics, electrical appliances, automobiles, machinery, aviation, aerospace, chemical engineering and the like.
Although liquid crystal polyesters have the advantages of excellent mechanical properties, excellent thermal expansion coefficient, excellent heat resistance, easy processing and the like, liquid crystal polymers have the disadvantages of insufficient toughness due to excessive rigidity, easy breakage during bending and low radial shear strength, so that the modification of liquid crystal polyesters to improve the toughness and expand the application range is urgently needed in practical application.
The invention content is as follows:
the present invention has been made in view of the above problems, and an object of the present invention is to provide a modified thermotropic liquid-crystalline polyester compound which is effective in improving the toughness of a liquid-crystalline polyester without lowering the strength and heat resistance thereof, and a method for processing the same.
The above purpose is realized by the following technical scheme:
the modified thermotropic liquid crystal polyester compound comprises, by weight, 100 parts of liquid crystal polyester, 20-30 parts of ethylene-vinyl acetate copolymer, 5-10 parts of dibutyl phthalate and 0.05-0.25 part of graphene oxide.
A method for processing a modified thermotropic liquid crystalline polyester composite, comprising the steps of:
(1) preparing the graphene oxide subjected to ultrasonic treatment: suspending graphene in deionized water, fully stirring to obtain a suspension, carrying out ultrasonic treatment on the obtained suspension for 30-60 minutes, and drying;
(2) taking 100 parts of liquid crystal polyester, 20-30 parts of ethylene-vinyl acetate copolymer and 5-10 parts of dibutyl phthalate according to parts by weight, heating to 320-45 ℃, melting and stirring, then adding 0.05-0.25 part of graphene oxide prepared in the step (1), uniformly mixing, extruding, granulating and drying.
The processing method of the modified thermotropic liquid crystal polyester compound comprises the following steps of (1) mixing the graphene and deionized water in a mass ratio of 1: (8-10).
The processing method of the modified thermotropic liquid crystal polyester compound comprises the step (1) of carrying out ultrasonic treatment at the ultrasonic frequency of 20-40 KHz.
In the processing method of the modified thermotropic liquid crystal polyester compound, the liquid crystal polyester in the step (2) is prepared by adopting p-hydroxybenzoic acid, 6-acetoxyl group-2-naphthoic acid, hydroquinone and terephthalic acid through a direct melt transesterification method.
Has the advantages that:
according to the invention, after the ethylene-vinyl acetate copolymer, the dibutyl phthalate and the graphene are added into the liquid crystal polyester, the toughness of the liquid crystal polyester is effectively improved, and the strength and the heat resistance of the liquid crystal polyester are not reduced.
The specific implementation mode is as follows:
a method for processing a modified thermotropic liquid crystalline polyester composite, comprising the steps of:
(1) preparing the graphene oxide subjected to ultrasonic treatment: suspending graphene in deionized water, fully stirring to obtain a suspension, carrying out ultrasonic treatment on the obtained suspension for 30-60 minutes, and drying;
(2) taking 100 parts of Liquid Crystal Polyester (LCP), 20-30 parts of ethylene-vinyl acetate copolymer (EVA) and 5-10 parts of dibutyl phthalate (DBP) according to parts by weight, heating to 320-45 ℃, melting and stirring, then adding 0.05-0.25 part of graphene oxide prepared in the step (1), uniformly mixing, extruding, granulating and drying.
The processing method of the modified thermotropic liquid crystal polyester compound comprises the following steps of (1) mixing the graphene and deionized water in a mass ratio of 1: (8-10).
The processing method of the modified thermotropic liquid crystal polyester compound comprises the step (1) of carrying out ultrasonic treatment at the ultrasonic frequency of 20-40 KHz.
In the processing method of the modified thermotropic liquid crystal polyester compound, the liquid crystal polyester in the step (2) is prepared by adopting p-hydroxybenzoic acid, 6-acetoxyl group-2-naphthoic acid, hydroquinone and terephthalic acid through a direct melt transesterification method.
The specific embodiment is as follows:
the liquid crystal polyester is prepared by adopting p-hydroxybenzoic acid, 6-acetoxyl-2-naphthoic acid, hydroquinone and terephthalic acid through a direct melt transesterification method.
Suspending graphene in deionized water, fully stirring to obtain a suspension, carrying out ultrasonic treatment on the obtained suspension for 30-60 minutes, and drying for later use;
adding the raw materials according to the proportion shown in the table 1 into a reactor, heating to 320-45 ℃, melting, stirring, adding graphene, uniformly mixing, extruding, granulating and drying. The tensile strength of the product was measured according to ASTM D-638, the heat distortion temperature of the product was measured according to ASTM D-648, and the tensile modulus was measured as follows:
| LCP (gram) | EVA (gram) | DBP (gram) | Graphene (gram) | Notched impact strength (J/m) | Heat distortion temperature (. degree. C.) | |
| Comparative example 1 | 100 | 0 | 0 | 0 | 504 | 232 |
| Comparative example 2 | 100 | 20 | 0 | 0 | 456 | 256 |
| Comparative example 3 | 100 | 30 | 0 | 0 | 428 | 247 |
| Comparative example 4 | 100 | 0 | 5 | 0 | 496 | 258 |
| Comparative example 5 | 100 | 0 | 8 | 0 | 508 | 267 |
| Comparative example 6 | 100 | 0 | 10 | 0 | 492 | 262 |
| Comparative example 7 | 100 | 0 | 0 | 0.05 | 500 | 278 |
| Comparative example 8 | 100 | 0 | 0 | 0.10 | 502 | 282 |
| Comparative example 9 | 100 | 0 | 0 | 0.15 | 506 | 280 |
| Comparative example 10 | 100 | 0 | 0 | 0.25 | 508 | 290 |
| Comparative example 11 | 100 | 10 | 5 | 0 | 518 | 235 |
| Comparative example 12 | 100 | 10 | 5 | 0.05 | 514 | 246 |
| Example 1 | 100 | 20 | 5 | 0.05 | 549 | 237 |
| Example 2 | 100 | 22 | 10 | 0.25 | 552 | 248 |
| Example 3 | 100 | 24 | 8 | 0.10 | 556 | 253 |
| Example 4 | 100 | 26 | 6 | 0.15 | 544 | 259 |
| Example 5 | 100 | 28 | 5 | 0.20 | 551 | 267 |
| Example 6 | 100 | 30 | 10 | 0.25 | 536 | 252 |
It can be seen from the above comparative examples and examples that the toughness of the liquid crystal polyester is effectively improved without reducing the strength and heat resistance thereof under the same reaction conditions and the same main material proportioning conditions.
The above are only the best embodiments of the present invention, and the method of the present invention includes but is not limited to the above embodiments, and the present invention is not limited to the matters described above, which belong to the common general knowledge of those skilled in the art.
Claims (5)
1. A modified thermotropic liquid crystal polyester composite, characterized by: the liquid crystal material comprises, by weight, 100 parts of liquid crystal polyester, 20-30 parts of ethylene-vinyl acetate copolymer, 5-10 parts of dibutyl phthalate and 0.05-0.25 part of graphene oxide.
2. A processing method of a modified thermotropic liquid crystal polyester compound is characterized by comprising the following steps: the method comprises the following steps:
(1) preparing the graphene oxide subjected to ultrasonic treatment: suspending graphene in deionized water, fully stirring to obtain a suspension, carrying out ultrasonic treatment on the obtained suspension for 30-60 minutes, and drying;
(2) taking 100 parts of liquid crystal polyester, 20-30 parts of ethylene-vinyl acetate copolymer and 5-10 parts of dibutyl phthalate according to parts by weight, heating to 320-45 ℃, melting and stirring, then adding 0.05-0.25 part of graphene oxide prepared in the step (1), uniformly mixing, extruding, granulating and drying.
3. The method of claim 1, wherein the method comprises the steps of: in the step (1), the mass ratio of the graphene to the deionized water is 1: (8-10).
4. The method of claim 1, wherein the method comprises the steps of: the ultrasonic frequency of the ultrasonic treatment in the step (1) is 20-40 KHz.
5. The method of claim 1, wherein the method comprises the steps of: the liquid crystal polyester in the step (2) is prepared from p-hydroxybenzoic acid, 6-acetoxyl-2-naphthoic acid, hydroquinone and terephthalic acid by a direct melt transesterification method.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910558776.8A CN110885537A (en) | 2019-06-26 | 2019-06-26 | Modified thermotropic liquid crystal polyester compound and processing method thereof |
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| CN201910558776.8A CN110885537A (en) | 2019-06-26 | 2019-06-26 | Modified thermotropic liquid crystal polyester compound and processing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112339384A (en) * | 2020-11-08 | 2021-02-09 | 合肥乐凯科技产业有限公司 | Optical polyester film and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020060309A1 (en) * | 2000-09-01 | 2002-05-23 | Jester Randy Douglas | Blends of stretchable liquid crystal polymers with thermoplastics |
| CN103804667A (en) * | 2014-03-05 | 2014-05-21 | 南通海迪化工有限公司 | Method for improving molecular weight of thermotropic liquid crystal polymer |
| CN104559145A (en) * | 2014-12-16 | 2015-04-29 | 惠州力王佐信科技有限公司 | High-toughness and high-thermal-conductivity polymer material and preparation method thereof |
| CN106349658A (en) * | 2016-08-22 | 2017-01-25 | 广东纳路纳米科技有限公司 | Three-dimensional graphene modification-based plastic composite material and preparation thereof |
-
2019
- 2019-06-26 CN CN201910558776.8A patent/CN110885537A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020060309A1 (en) * | 2000-09-01 | 2002-05-23 | Jester Randy Douglas | Blends of stretchable liquid crystal polymers with thermoplastics |
| CN103804667A (en) * | 2014-03-05 | 2014-05-21 | 南通海迪化工有限公司 | Method for improving molecular weight of thermotropic liquid crystal polymer |
| CN104559145A (en) * | 2014-12-16 | 2015-04-29 | 惠州力王佐信科技有限公司 | High-toughness and high-thermal-conductivity polymer material and preparation method thereof |
| CN106349658A (en) * | 2016-08-22 | 2017-01-25 | 广东纳路纳米科技有限公司 | Three-dimensional graphene modification-based plastic composite material and preparation thereof |
Non-Patent Citations (3)
| Title |
|---|
| 刘玲: "《土木工程材料》", 31 January 2018 * |
| 周文英: "《聚合物基导热复合材料》", 30 June 2017 * |
| 辛浩波: "《塑料合金及塑橡共混改性：配方·工艺·性能·应用技术》", 31 May 2000, 中国轻工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112339384A (en) * | 2020-11-08 | 2021-02-09 | 合肥乐凯科技产业有限公司 | Optical polyester film and preparation method thereof |
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