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A kind of thermoplastic polyetherimide insulating and heat-conducting composite material and preparation method thereof

A polyetherimide and polyetherimide resin technology, which is applied in the field of polymer functional composite materials, can solve the problems of losing insulation properties, not considering the shape and particle size of fillers, etc., and achieves improved thermal conductivity and comprehensive performance. Excellent and broad application prospects

Active Publication Date: 2021-11-09
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention uses graphite powder as an important thermal conductive filler, because graphite powder has both good thermal conductivity and electrical conductivity, which will cause the system to lose its insulating properties, and the shape and particle size of the filler are not considered.

Method used

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  • A kind of thermoplastic polyetherimide insulating and heat-conducting composite material and preparation method thereof
  • A kind of thermoplastic polyetherimide insulating and heat-conducting composite material and preparation method thereof
  • A kind of thermoplastic polyetherimide insulating and heat-conducting composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]40 parts of polyetherimide and 50 parts of boron nitride (surface-treated with silane coupling agent γ-(2,3-epoxypropoxy)propyltrimethoxysilane accounting for 2.5 wt% of boron nitride mass) , 5 parts of zinc oxide whiskers (surface-treated with γ-(methacryloyloxy)propyltrimethoxysilane accounting for 1 wt% of the quality of zinc oxide whiskers) and 5 parts of polyethylene wax after mixing uniformly in a high-speed mixer , added to a twin-screw extruder for uniform plasticization, extrusion, and granulation. The twin-screw extrusion temperature is 345° C., and the screw speed is 200 rpm. The obtained pellets were made into insulating and heat-conducting composite materials by injection molding. The injection molding temperature was 360° C. and the injection molding pressure was 40 MPa. The properties are shown in Table 1.

Embodiment 2

[0038] 48 parts of polyetherimide, 40 parts of aluminum nitride (surface treated with silane coupling agent 3-aminopropyltriethoxysilane accounting for 1 wt% of aluminum nitride quality), 10 parts of potassium titanate whiskers ( After being treated with silane coupling agent γ-(2,3-epoxypropoxy)propyltrimethoxysilane (2,3-epoxypropoxy)propyltrimethoxysilane surface treatment) and 2 parts of liquid paraffin in a high-speed mixer, Carry out extrusion and injection molding, processing condition is the same as embodiment 1, and its performance is as shown in table 1.

Embodiment 3

[0040] 46 parts of polyetherimide, 30 parts of silicon carbide (surface treated with γ-(methacryloyloxy)propyl trimethoxysilane accounting for 3wt% of the mass of silicon carbide), 20 parts of boron nitride (treated with nitrogen γ-(2,3-epoxypropoxy)propyltrimethoxysilane surface treatment with 3wt% of the mass of boron oxide), 1 part of potassium titanate whiskers (through n-propanol which accounts for 3wt% of the mass of potassium titanate whiskers Zirconium (IV) surface treatment) and 3 parts of polyethylene wax were mixed uniformly in a high-speed mixer, then added to an internal mixer for plasticization and mixing, the mixing temperature was set at 340 ° C, and the rotor speed was 50 rpm; The insulating and heat-conducting composite material was made by hot-pressing on the press. The hot-pressing temperature was 360°C and the hot-pressing pressure was 30 MPa. The properties are shown in Table 1.

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Abstract

The invention discloses a thermoplastic polyetherimide insulation, heat conduction and high temperature resistant composite material and a preparation method thereof. The insulating and heat-conducting composite material is composed of thermoplastic polyetherimide resin, heat-conducting filler, auxiliary filler and processing aid, and its composition contains 20-84 parts by mass of polyetherimide, 15-70 parts by mass of heat-conducting filler, 1 ~20 parts by mass of auxiliary fillers, 0~9 parts by mass of processing aids. The polyetherimide insulation, heat conduction and high temperature resistant composite material of the present invention has good thermal conductivity, insulation performance, high temperature resistance and flame retardancy, and can maintain good performance in a wide range of -150 to 200°C. There are broad application prospects in the field of high-end electronic devices with insulation, heat conduction, high temperature resistance and flame retardant requirements.

Description

technical field [0001] The invention belongs to the technical field of polymer functional composite materials, and in particular relates to a thermoplastic polyetherimide insulation, heat conduction and high temperature resistant composite material and a preparation method thereof. Background technique [0002] With the advancement of industrial technology, the electronic and electrical product industry has gradually developed by leaps and bounds, and the application of polymer materials in electronic and electrical appliances has become more and more widespread. However, due to insufficient heat dissipation, the phenomenon of accelerated aging or even burning of materials occurs from time to time. The demand for thermal conductivity and heat resistance of materials is increasingly urgent. At the same time, electronic appliances also have requirements for insulation and mechanical properties of materials, which undoubtedly pose new challenges for the construction of materials...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08K9/06C08K3/38C08K7/08C08K3/28C08K3/34C08K5/09C08K3/22
CPCC08K3/34C08K5/09C08K7/08C08K9/06C08K2003/2227C08K2003/282C08K2003/385C08L79/08C08L2201/02C08L2201/08C08L2203/20C08L23/06C08K3/38C08L91/06C08K3/28C08K3/22
Inventor 温变英赫达
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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