High-heat-resistance LCP material easy to form and process and preparation method thereof

A molding processing, high heat resistance technology, applied in the direction of liquid crystal materials, chemical instruments and methods, etc., can solve the problems of LCP material molding processing difficulties, high melting point, high thermal decomposition temperature, etc., to improve heat resistance and increase crosslinking density , Improve the effect of heat resistance

Pending Publication Date: 2021-11-30
NINGXIA QINGYAN POLYMER MATERIALS CO LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the melting point of most LCP materials is too high, above the thermal decomposition temperature
Therefore, they have been decomposed before melting, which makes the molding and processing of LCP materials difficult

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] One embodiment of the present invention provides a method for preparing a high heat-resistant LCP material that is easy to form and process, which includes the following steps:

[0042] (1) Mix 0.15mol PEPA and 5mol acetic acid, add them into a three-necked flask with a condensing device, heat in an oil bath at 120°C until PEPA is completely dissolved, slowly add 0.15mol ABA under stirring, heat to 135°C and keep it for 4h, 50 Cool naturally at ℃ until the crystals are completely precipitated, wash with acetic acid and ethanol, and dry at 160 ℃ for 24 hours to obtain PE-COOH.

[0043] (2) Mix 0.15mol PEPA and 5mol acetic acid, add them into a three-necked flask with a condensing device, heat in an oil bath at 120°C until the PEPA is completely dissolved, slowly add 0.15mol AP while stirring, heat to 135°C for 4 hours, 50 Cool naturally at ℃ until the crystals are completely precipitated, wash with acetic acid and ethanol, and dry at 160 ℃ for 24 hours to obtain PE-OAc. ...

Embodiment 2

[0047] One embodiment of the present invention provides a method for preparing a high heat-resistant LCP material that is easy to form and process, which includes the following steps:

[0048] (1) Mix 0.1mol PEPA and 4mol acetic acid, add them into a three-necked flask with a condensing device, heat in an oil bath at 110°C until PEPA is completely dissolved, slowly add 0.1mol ABA under stirring, heat to 130°C for 6h, 60 Cool naturally at ℃ until the crystals are completely precipitated, wash with acetic acid and ethanol, and dry at 150℃ for 48h to obtain PE-COOH.

[0049] (2) Mix 0.1mol PEPA and 4mol acetic acid, add them into a three-neck flask with a condensing device, heat in an oil bath at 110°C until PEPA is completely dissolved, slowly add 0.1mol AP while stirring, heat to 130°C and keep it for 6h, 60 Cool naturally at ℃ until the crystals are completely precipitated, wash with acetic acid and ethanol, and dry at 150 ℃ for 48 hours to obtain PE-OAc.

[0050] (3) 0.5mol ...

Embodiment 3

[0053] One embodiment of the present invention provides a method for preparing a high heat-resistant LCP material that is easy to form and process, which includes the following steps:

[0054] (1) Mix 0.1mol PEPA and 4mol acetic acid, add them into a three-necked flask with a condensing device, heat in an oil bath at 120°C until PEPA is completely dissolved, slowly add 0.1mol ABA under stirring, heat to 150°C and keep it for 4h, 50 Cool naturally at ℃ until the crystals are completely precipitated, wash with acetic acid and ethanol, and dry at 160 ℃ for 24 hours to obtain PE-COOH.

[0055] (2) Mix 0.1mol PEPA and 4mol acetic acid, add them into a three-necked flask with a condensing device, heat in an oil bath at 120°C until PEPA is completely dissolved, slowly add 0.1mol AP while stirring, heat to 150°C and keep it for 4h, 50 Cool naturally at ℃ until the crystals are completely precipitated, wash with acetic acid and ethanol, and dry at 160 ℃ for 24 hours to obtain PE-OAc. ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
melting pointaaaaaaaaaa
thermal decomposition temperatureaaaaaaaaaa
melting pointaaaaaaaaaa
Login to view more

Abstract

The invention discloses a high-heat-resistance LCP material easy to form and process and a preparation method thereof. The preparation method comprises the following steps: mixing a mixed monomer, a reactive end-capping reagent, an inorganic filler and acetic anhydride, conducting stirring in a protective atmosphere, carrying out heating according to a preset program, performing cooling in the protective atmosphere, and carrying out crushing and grinding to obtain the high-heat-resistance LCP material easy to form and process, wherein a reactive end-capping reagent is prepared from N-(4-carboxylphenyl)-4-phenylethynyl phthalimide and N-(4-acetoxyphenyl)-4-phenylethynyl phthalimide. According to the invention, by introducing the reactive end-capping reagent, the molecular weight of the main chain of a polymer is reduced so as to lower a melting point, and the reactive end-capping reagent also enables the linear polymer to be crosslinked and cured, so crosslinking density is improved, and the heat resistance of the LCP is improved. In addition, a proper carbon nanofiller is introduced, so the heat resistance of the LCP material is further improved, and the machinability of the LCP material is also achieved while the high heat resistance of the LCP material is finally ensured.

Description

technical field [0001] The invention relates to the technical field of liquid crystal polymers, in particular to a highly heat-resistant LCP material which is easy to form and process and a preparation method thereof. Background technique [0002] High-performance polymers are characterized by high heat resistance and usually exhibit a high glass transition temperature (Tg > 200°C) or a prominent initial thermal decomposition temperature (Td > 350°C) or excellent mechanical properties. Current high-performance polymers are usually dominated by the use of aromatic (heterocyclic) monomers. [0003] Main-chain wholly aromatic liquid crystal polymers (MALCPs) are one of the unique high-performance wholly aromatic polymers capable of forming highly ordered structure, the polymer chains exhibit a high degree of orientation by processing MALCPs in the liquid crystal phase. [0004] Wholly aromatic thermotropic liquid crystal polyesters are the most widely studied type of th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/685C08K3/04C09K19/38
CPCC08G63/685C08K3/041C09K19/3809
Inventor 张东宝于冉徐良
Owner NINGXIA QINGYAN POLYMER MATERIALS CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap