Filling-type thermal-conducting electric-insulating polyphenyl thioether and polyamide blended alloy and preparation method thereof

Abstract

The invention discloses a filling-type thermal-conducting electric-insulating polyphenyl thioether and polyamide blended alloy and a preparation method thereof. The blended alloy comprises polyphenyl thioether, polyamide, an inorganic thermal-conducting filler, a surface modifier and processing assistants, wherein the polyamide and the polyphenyl thioether form a bicontinuous phase structure, and the inorganic thermal-conducting filler is distributed in the polyamide phase and forms a continuous thermal-conducting network. The preparation method comprises the following three steps: step 1: carrying out the surface modification on the inorganic thermal-conducting filler by using the surface modifier; step 2: mixing the inorganic thermal-conducting filler, the polyamide and the processing assistants by using a high-speed mixer, and extruding the mixture by using a double screw extruder to obtain the thermal-conducting master batch; and step 3: extruding the thermal-conducting master batch, the polyphenyl thioether and the processing assistants for the second time to make granules. The composite material of the invention has good thermal conduction, electrical insulation, mechanical properties and processability. Under the condition of the same amount of the inorganic thermal-conducting filler, compared with the blended alloy phase in which the continuous phase is not formed, the coefficient of thermal conductivity of the composite material in the invention is obviously enhanced.

Description

technical field

[0001] The invention relates to a polyphenylene sulfide (PPS) / polyamide blend alloy, in particular to a (high heat conduction / easy heat dissipation) heat-conducting and insulating polyphenylene sulfide / polyamide blend alloy that can be injection molded for heat transfer and heat dissipation and its preparation method. Background technique

[0002] In the field of electronic technology, with the rapid development of the electronic and electrical industry, the requirements for insulating materials are getting higher and higher. In addition to good thermal conductivity, materials are expected to have excellent comprehensive properties, such as light weight, easy processing and molding, impact resistance, chemical corrosion resistance, excellent thermal fatigue performance, and excellent electrical insulation properties. For example, the bonding of the semiconductor tube ceramic substrate and the copper seat, the protection of the tube core, the sealing of the t...

Examples

Embodiment 1

[0030] 300g of nano-Al with an average particle size of 70nm and a thermal conductivity of 42W / (m·K) 2 o 3 , 20g of silane coupling agent KH560 pretreated by hydrolysis and 1L of petroleum ether were mixed, then ultrasonically dispersed for 30min (40kHz), heated to reflux for 12h and then extracted with ethanol for 12h. Vacuum drying at 80°C for 24 hours; the dried modified Al 2 o 3 , 350g PA66, 3g antioxidant (3052FF / P-EPQ) and 3g lubricant (PTES) are dispersed and mixed by a high-speed mixer, and then extruded by a twin-screw extruder to obtain a heat-conducting masterbatch. Section 270°C, homogenization section 275°C; then mix the thermally conductive masterbatch, 350g polyphenylene sulfide, 3g antioxidant (3052FF / P-EPQ) and 3g lubricant (PTES) in a high-speed mixer and perform secondary extrusion For granulation, the temperature of each zone of the twin-screw extruder used was 250-282 °C to prepare a filled thermally conductive insulating polyphenylene sulfide / polyamide...

Embodiment 2

[0032] 350g of nano-Al with an average particle size of 70nm and a thermal conductivity of 42W / (m·K) 2 o 3, 25g of silane coupling agent KH560 pretreated by hydrolysis and 1L of petroleum ether were mixed, then ultrasonically dispersed for 30min (40kHz), heated to reflux for 12h and extracted with ethanol for 12h. Vacuum drying at 80°C for 24 hours; the dried modified Al 2 o 3 , 325g PA66, 3g antioxidant (3052FF / P-EPQ) and 3g lubricant (PTES) are dispersed and mixed by a high-speed mixer, and then extruded by a twin-screw extruder to obtain a heat-conducting masterbatch. Section 270°C, homogenization section 275°C; then mix thermally conductive masterbatch, 325g polyphenylene sulfide, 3g antioxidant (3052FF / P-EPQ) and 3g lubricant (PTES) in a high-speed mixer and perform secondary extrusion For granulation, the temperature of each zone of the twin-screw extruder used was 250-282 °C to prepare a filled thermally conductive insulating polyphenylene sulfide / polyamide blend all...

Embodiment 3

[0034] Mix 400g of AlN with an average particle size of μm and a thermal conductivity of 320W / (m K), 10g of hydrolyzed pretreated silane coupling agent KH570, and 1L of petroleum ether, then ultrasonically disperse for 30min (40kHz), heat and reflux for 12h, and ethanol Extraction 12h. Vacuum drying at 80°C for 24 hours; After the dried modified AlN, 300g PA66, 3g antioxidant (3052FF / P-EPQ) and 3g lubricant (PTES) were dispersed and mixed by a high-speed mixer, extruded by a twin-screw extruder The heat-conducting masterbatch is obtained, wherein the feeding section is 170°C, the melting section is 270°C, and the homogenizing section is 275°C; then the heat-conducting masterbatch, 300g polyphenylene sulfide, 3g antioxidant (3052FF / P-EPQ) and 3g lubricant (PTES) is mixed by a high-speed mixer for secondary extrusion and granulation. The temperature of each zone of the twin-screw extruder used is 250-282°C to obtain a filled thermally conductive insulating polyphenylene sulfide / ...

technical field

[0001] The invention relates to a polyphenylene sulfide (PPS) / polyamide blend alloy, in particular to a (high heat conduction / easy heat dissipation) heat-conducting and insulating polyphenylene sulfide / polyamide blend alloy that can be injection molded for heat transfer and heat dissipation and its preparation method. Background technique

[0002] In the field of electronic technology, with the rapid development of the electronic and electrical industry, the requirements for insulating materials are getting higher and higher. In addition to good thermal conductivity, materials are expected to have excellent comprehensive properties, such as light weight, easy processing and molding, impact resistance, chemical corrosion resistance, excellent thermal fatigue performance, and excellent electrical insulation properties. For example, the bonding of the semiconductor tube ceramic substrate and the copper seat, the protection of the tube core, the sealing of the t...

Examples

Embodiment 1

[0030] 300g of nano-Al with an average particle size of 70nm and a thermal conductivity of 42W / (m·K) 2 o 3 , 20g of silane coupling agent KH560 pretreated by hydrolysis and 1L of petroleum ether were mixed, then ultrasonically dispersed for 30min (40kHz), heated to reflux for 12h and then extracted with ethanol for 12h. Vacuum drying at 80°C for 24 hours; the dried modified Al 2 o 3 , 350g PA66, 3g antioxidant (3052FF / P-EPQ) and 3g lubricant (PTES) are dispersed and mixed by a high-speed mixer, and then extruded by a twin-screw extruder to obtain a heat-conducting masterbatch. Section 270°C, homogenization section 275°C; then mix the thermally conductive masterbatch, 350g polyphenylene sulfide, 3g antioxidant (3052FF / P-EPQ) and 3g lubricant (PTES) in a high-speed mixer and perform secondary extrusion For granulation, the temperature of each zone of the twin-screw extruder used was 250-282 °C to prepare a filled thermally conductive insulating polyphenylene sulfide / polyamide...

Embodiment 2

[0032] 350g of nano-Al with an average particle size of 70nm and a thermal conductivity of 42W / (m·K) 2 o 3, 25g of silane coupling agent KH560 pretreated by hydrolysis and 1L of petroleum ether were mixed, then ultrasonically dispersed for 30min (40kHz), heated to reflux for 12h and extracted with ethanol for 12h. Vacuum drying at 80°C for 24 hours; the dried modified Al 2 o 3 , 325g PA66, 3g antioxidant (3052FF / P-EPQ) and 3g lubricant (PTES) are dispersed and mixed by a high-speed mixer, and then extruded by a twin-screw extruder to obtain a heat-conducting masterbatch. Section 270°C, homogenization section 275°C; then mix thermally conductive masterbatch, 325g polyphenylene sulfide, 3g antioxidant (3052FF / P-EPQ) and 3g lubricant (PTES) in a high-speed mixer and perform secondary extrusion For granulation, the temperature of each zone of the twin-screw extruder used was 250-282 °C to prepare a filled thermally conductive insulating polyphenylene sulfide / polyamide blend all...

Embodiment 3

[0034] Mix 400g of AlN with an average particle size of μm and a thermal conductivity of 320W / (m K), 10g of hydrolyzed pretreated silane coupling agent KH570, and 1L of petroleum ether, then ultrasonically disperse for 30min (40kHz), heat and reflux for 12h, and ethanol Extraction 12h. Vacuum drying at 80°C for 24 hours; After the dried modified AlN, 300g PA66, 3g antioxidant (3052FF / P-EPQ) and 3g lubricant (PTES) were dispersed and mixed by a high-speed mixer, extruded by a twin-screw extruder The heat-conducting masterbatch is obtained, wherein the feeding section is 170°C, the melting section is 270°C, and the homogenizing section is 275°C; then the heat-conducting masterbatch, 300g polyphenylene sulfide, 3g antioxidant (3052FF / P-EPQ) and 3g lubricant (PTES) is mixed by a high-speed mixer for secondary extrusion and granulation. The temperature of each zone of the twin-screw extruder used is 250-282°C to obtain a filled thermally conductive insulating polyphenylene sulfide / ...

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