LCP/HBN composite material and preparation method thereof

A technology of composite materials and polymer materials, which is applied in the field of LCP/HBN composite materials and its preparation, can solve the problems of long thermal history of composite materials, easy degradation of polymers, poor dispersion of thermally conductive fillers, etc., to improve thermal stability, Improve the bulk density, improve the effect of dispersion and mixing efficiency

Pending Publication Date: 2022-08-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of composite materials in a screw extruder dominated by shear deformation has problems such as long thermal history, poor dispersion of thermally conductive fillers, and easy degradation of polymers, making it difficult to achieve optimal performance of composite materials.

Method used

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  • LCP/HBN composite material and preparation method thereof
  • LCP/HBN composite material and preparation method thereof
  • LCP/HBN composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This example provides four preparation methods for LCP / HBN composite materials.

[0034] According to the formula of Sample 1 and Comparative Samples 1 to 3 shown in Table 1, the ingredients were mixed and mixed in a high-speed mixer of 35000 r / min for 5 minutes, and then melt-blended using a polymer material plasticization and transportation equipment based on extensional rheology. , the temperature of each section is 230-300-310-310 ° C, the rotor speed is 45 rpm, extrusion molding, cooling, drying, that is, four kinds of LCP / HBN composite materials are obtained.

[0035] The above materials were dried in a vacuum drying oven at 130° C. for 6 hours, and the dried LCP / HBN composite sheets were arranged in a fixed direction, which was consistent with the melt flow direction during extrusion. The samples were prepared by hot pressing with a flat vulcanizer, the temperature was 300 °C, the preheating time was 15 min, the hot pressing was 3 min, and the cold pressing was 5...

Embodiment 2

[0039] This embodiment provides 6 kinds of LCP / HBN composite materials and preparation methods thereof.

[0040] According to the formulas of samples 1 to 3 and comparative samples 1, 4 and 5 shown in Table 2, the ingredients were mixed, mixed in a 35000r / min high-speed mixer for 5 minutes, and then plasticized and transported using an extensional rheology-based polymer material. The equipment is melt-blended, the temperature of each section is 230-300-310-310°C, the rotor speed is 45 rpm, extrusion molding, cooling and drying, that is, 6 kinds of LCP / HBN composite materials are obtained.

[0041] The above materials were dried in a vacuum drying oven at 130° C. for 6 hours, and the dried LCP / HBN composite sheets were arranged in a fixed direction, which was consistent with the melt flow direction during extrusion. The samples were prepared by hot pressing with a flat vulcanizer, the temperature was 300 °C, the preheating time was 15 min, the hot pressing was 3 min, and the co...

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Abstract

The invention discloses an LCP / HBN composite material and a preparation method thereof. The heat-conducting polymer composite material is prepared by compounding and filling the heat-conducting fillers, compounding of the heat-conducting fillers with different particle sizes has a heat-conducting synergistic effect, and the heat conductivity coefficient of the composite material is improved. Meanwhile, high polymer material plasticizing and transporting equipment based on extensional rheology is used for processing, and the composite material has better dispersing and mixing efficiency in a flow field dominated by extensional deformation than in a flow field dominated by shear deformation. The preparation method of the LCP / HBN composite material is simple, additives and chemical reagents do not need to be added, and pollution to the environment can be reduced while the cost is reduced. The heat conductivity of the composite material is improved, the heat stability of the composite material is also improved, the mechanical property of the material can be maintained, the use scene of the material is greatly widened, and the composite material has wide application prospects in the fields of packaging materials, electronic substrates and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of polymer materials, in particular to an LCP / HBN composite material and a preparation method thereof. Background technique [0002] Liquid crystal polymer (LCP) is an excellent high-performance special engineering plastics. It has high molecular weight and orderly orientation, low hygroscopicity, good dimensional stability, high thermal decomposition temperature, low dielectric loss, and excellent mechanical properties. The above features are beneficial to its application in electronic and electrical packaging materials and electronic substrates. [0003] However, with the advent of the high-frequency and high-speed 5G era, the power of electronic components increases and the size decreases, which will generate a lot of heat during operation. If the heat cannot be dissipated in time, it will lead to heat accumulation and local temperature rise, which will affect the element. The normal use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/12C08K3/38
CPCC08L101/12C08K3/38C08K2003/385C08K2201/014C08K2201/005
Inventor 何和智王畅朱治文
Owner SOUTH CHINA UNIV OF TECH
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