Polypropylene material modified by magnesium hydroxide crystal whiskers and preparation method of polypropylene material
A technology of polypropylene material and magnesium hydroxide, which is applied in the field of composite materials, can solve the problems of material mechanical properties decline, poor compatibility, and different shape reinforcement effects, and achieve improved breaking strength and elongation at break, flame retardant The effect of excellent performance
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[0070] Example 1: Preparation of a polypropylene material modified with magnesium hydroxide whiskers
[0071] (1) Set the banburying temperature of the rheometer to 170℃, the banburying time for 15min, and the rotor speed at 30r / min. Weigh 100 parts of polypropylene resin and 30 parts of magnesium hydroxide whiskers according to the formula It is 0.1~0.3μm, the aspect ratio is 80~90), 1 part stearic acid and 1 part calcium stearate are poured into the Huck Torque Rheometer, mixed evenly, then extruded and cooled to room temperature;
[0072] (2) Pre-press the plate vulcanizer first, set the pre-press temperature to 170°C, and the pre-press time to 30min. After pre-pressing, adjust the temperature control knob to set the hydraulic temperature to 180°C. After the plate temperature stabilizes, Put the sample obtained in step (1) on the plate, start the hydraulic button, press the plate well, pressurize it to 5-10MPa, keep the pressure for 1h, then stop heating, cool to room temperatur...
Example Embodiment
[0074] Example 2: Preparation of a polypropylene material modified with magnesium hydroxide whiskers
[0075] (1) Set the banburying temperature of the rheometer to 160℃, the banburying time for 20min, and the rotor speed at 40r / min. Weigh 100 parts of polypropylene resin and 10 parts of magnesium hydroxide whiskers (its diameter It is 2.5~3μm, the aspect ratio is 90~100), 2 parts of ethylene bis-stearamide and 2 parts of zinc stearate are poured into the Huck torque rheometer, mixed evenly, then extruded and cooled to room temperature ;
[0076] (2) Pre-press the plate vulcanizer, set the pre-press temperature to 160°C, and the pre-press time to 40min. After pre-pressing, adjust the temperature control knob to set the hydraulic temperature to 170°C. After the plate temperature stabilizes, Put the sample obtained in step (1) on the plate, start the hydraulic button, press the plate well, pressurize it to 10-15MPa, keep the pressure for 2h, then stop heating, cool to room temperatu...
Example Embodiment
[0078] Example 3: Preparation of a polypropylene material modified with magnesium hydroxide whiskers
[0079] In addition to setting the rheometer in step (1), the banburying temperature is 180℃, the banburying time is 10min, and the rotor speed is 20r / min. Weigh 100 parts of polypropylene resin and 20 parts of magnesium hydroxide whiskers according to the formula. (The diameter is 1.5~2.0μm, the aspect ratio is 85~90), 3 parts of polyethylene wax and 3 parts of magnesium stearate; in step (2), the pre-pressing temperature is 180℃, the pre-pressing time is 20min, hydraulic pressure The temperature was 190°C, and the pressure was maintained for 0.5 h, and the other steps were the same as in Example 1, and the desired product was obtained.
[0080] The mechanical properties (tensile strength and elongation at break) test and oxygen index test of the obtained product were carried out, and the test results are listed in Table 1.
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