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PBT (polybutylene terephthalate) Composite
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A composite material, wollastonite technology, applied in the field of PBT composite materials, can solve problems not seen in reports
Inactive Publication Date: 2018-04-24
薛亚红
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Problems solved by technology
[0003] PBT-wollastonite materials have been widely used in home appliances, automobiles, medical and other fields, using methyl methacrylate-styrene-butadiene copolymer (MBS) as a toughening agent, and titanate The coupling agent treats wollastonite to produce a high-performance PBT composite material, which has not been reported so far, and has very important practical significance
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Embodiment 1
[0021] 1) Weigh 80 parts of PBT, 10 parts of PA66, 30 parts of modified wollastonite, 20 parts of MBS, 0.1 part of Irganox168, 0.2 part of Irganox1010, 0.2 part of Irganox1330, 0.1 part of calciumstearate, 0.2 part of zincstearate and mix and stir evenly to obtain a mixture;
[0022] 2) Extruding and granulating the mixture obtained in step 1), to obtain the PBT composite material P2.
[0023] Among them, the temperature and screw speed of each zone of the twin-screw extruder are respectively: the temperature of the first zone is 180°C, the temperature of the second zone is 240°C, the temperature of the third zone is 240°C, the temperature of the fourth zone is 240°C, the temperature of the fifth zone is 240°C, and the temperature of the sixth zone is 240°C. The head temperature is 240°C; the screw speed is 260r / min.
Embodiment 2
[0025] 1) Weigh 65 parts of PBT, 8 parts of PA66, 25 parts of modified wollastonite, 15 parts of MBS, 0.1 part of Irganox168, 0.2 part of Irganox1010, 0.1 part of potassiumstearate, 0.1 part of zinc stearate, mix and stir evenly, get the mixture;
[0026] 2) Extruding and granulating the mixture obtained in step 1), to obtain PBT composite material P3.
[0027] Among them, the temperature and screw speed of each zone of the twin-screw extruder are: the temperature of the first zone is 170°C, the temperature of the second zone is 220°C, the temperature of the third zone is 220°C, the temperature of the fourth zone is 220°C, the temperature of the fifth zone is 220°C, and the temperature of the sixth zone is 220°C. The head temperature is 220°C; the screw speed is 230r / min.
Embodiment 3
[0029] 1) Weigh 50 parts of PBT, 5 parts of PA66, 27 parts of modified wollastonite, 18 parts of MBS, 0.1 part of Irganox1010, 0.2 part of Irganox1330, 0.1 part of potassium stearate, 0.1 part of zinc stearate, mix and stir evenly, get the mixture;
[0030] 2) extruding and granulating the mixture obtained in step 1), to obtain the PBT composite material P4.
[0031] Among them, the temperature and screw speed of each zone of the twin-screw extruder are respectively: the temperature of the first zone is 175°C, the temperature of the second zone is 225°C, the temperature of the third zone is 225°C, the temperature of the fourth zone is 225°C, the temperature of the fifth zone is 225°C, and the temperature of the sixth zone is 225°C. The head temperature is 225°C; the screw speed is 240r / min.
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Abstract
The invention relates to PBT composite, prepared from, by weight, 50-80 parts of PBT, 5-10 parts of PA66 (polyamide 66), 20-30 parts of modified wollastonite, 10-20 parts of MBS (methyl methacrylate-butadiene-styrene), 0.1-0.5 part of an antioxidant, and 0.1-0.3 part of a lubricant. The modified wollastonite is wollastonite modified via titanatecoupling agent and sodiumdodecyl sulfate. Accordingto the technical scheme, MBS is a typical core-shell toughener, the shell is of St (styrene) and MMA (methyl methacrylate), and MMA only functions to improve compatibility between MBS and PBT so thatMBS can be dispersed evenly in the PBT composite. When the PBT composite experiences external impact, stress concentration focuses on the shell of MBS so that the shell deforms, silver crazing and shear stripes occur around, energy is absorbed by silver crazing and shearing, and toughening is achieved accordingly.
Description
technical field [0001] The invention belongs to the technical field of polymer materials, in particular to a PBT composite material. Background technique [0002] Polybutylene terephthalate (PBT) is a colorless and transparent thermoplastic resin, which is widely used because of its low price and easy processing. Wollastonite is a triclinic crystal system, thin plate-shaped crystals with low oil absorption, low electrical conductivity, and good insulation. It is mainly used as a reinforcing filler for polymer-based composite materials. [0003] PBT-wollastonite materials have been widely used in home appliances, automobiles, medical and other fields, using methyl methacrylate-styrene-butadiene copolymer (MBS) as a toughening agent, and titanateCoupling agent treats wollastonite to produce a high-performance PBT composite material, which has not been reported so far, and has very important practical significance. Contents of the invention [0004] The purpose of this inv...
Claims
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Application Information
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