A liquid crystal polymer/cubic boron nitride masterbatch and preparation method thereof
A technology of liquid crystal polymer and cubic boron nitride, applied in the field of polymer materials, can solve problems such as poor high temperature resistance
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Embodiment 1
[0037] (1) Add 100 parts of liquid crystal polymer A950 to 5 parts of dimethyl silicone oil and mix for 2 minutes at room temperature with a high-speed mixer; then add 50 parts of cubic boron nitride powder with a particle size of 1000 mesh, and mix for 3 minutes with a high-speed mixer at room temperature. The speed is 100 revolutions / min;
[0038] (2) Melt extrude, pelletize, and dry the mixed material through a twin-screw extruder to obtain liquid crystal polymer / cubic boron nitride masterbatch; the temperature of the extruder is 200°C from the feed to the die head. 260°C, 300°C, 320°C, 320°C, 325°C, screw length to diameter ratio is 30, screw speed is 200 revolutions / min.
[0039] Add 0.5 parts by weight of the liquid crystal polymer / cubic boron nitride masterbatch prepared above to 99.5 parts of PA66 and mix with a high-speed mixer at room temperature for 2 minutes at a mixing speed of 120 revolutions / min. The mixed blend The material is extruded and pelletized by a twin-scre...
Embodiment 2
[0053] Add 10 parts of dimethyl silicone oil to 100 parts of liquid crystal polymer E6000 and mix for 5 minutes at room temperature with a high-speed mixer, then add 100 parts of CBN powder with a particle size of 2500 mesh, and mix with a high-speed mixer at room temperature for 5 minutes at a speed of 300 revolutions / min, the mixed material is melted, extruded, pelletized, dried and packaged through a twin-screw extruder. The temperature of the extruder is 200°C, 260°C, 300°C, 320°C, 330°C, and 335°C from the feed to the die. The screw L / D ratio is 40, and the screw speed is 300 rpm.
[0054] Add 6 parts by weight of the liquid crystal polymer / cubic boron nitride masterbatch prepared by the above method to 94 parts of PA66 and mix with a high-speed mixer at room temperature for 5 minutes at a mixing speed of 300 revolutions / min. The mixed total The mixture is extruded and granulated by a twin-screw extruder. The temperature of each zone of the extruder is 220℃, 260℃, 280℃, 300...
Embodiment 3
[0056] Add 6 parts of dimethyl silicone oil to 100 parts of liquid crystal polymer HX2000 and mix for 3 minutes at room temperature with a high-speed mixer, then add 70 parts of CBN powder with a particle size of 1250 mesh, mix with a high-speed mixer at room temperature for 5 minutes, and the speed of the mixer is 120 rpm / min, the mixed material is melted, extruded, granulated, dried, and packaged through a twin-screw extruder. The temperature of the extruder is 200°C, 280°C, 300°C, 320°C, 320°C, and 325°C from the feed to the die. The screw L / D ratio is 35, and the screw speed is 220 rpm.
[0057] Add 2 parts by weight of the liquid crystal polymer / cubic boron nitride masterbatch prepared by the above method to 98 parts of PPS and mix at room temperature for 5 minutes with a high-speed mixer at a mixing speed of 120 revolutions / min. The mixed total The mixture is extruded and granulated by a twin-screw extruder. The temperature of each zone of the extruder is 220℃, 260℃, 280℃,...
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