A polypropylene composition and polypropylene material
A technology of polypropylene composition and polypropylene, which is applied in the field of polypropylene composition and polypropylene materials, can solve the problems of poor impact strength and achieve the effects of improving impact resistance, increasing rigidity, and shortening the molding cycle
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preparation example Construction
[0041] The present invention does not specifically limit the water content in the alcohol corresponding to the alkoxy group in the preparation process of the above-mentioned alkoxy magnesium compound. In order to make the obtained alkoxy magnesium compound have more excellent performance, moisture content is required. The less the content, the better. Generally, the water content in the alcohol corresponding to the alkoxy group needs to be controlled below 1000 ppm, preferably below 200 ppm.
[0042] According to the present invention, the inert atmosphere is known to those skilled in the art, preferably nitrogen atmosphere and / or argon atmosphere. In addition, the preparation of the magnesium alkoxide compound usually uses an inert solvent as a reaction medium. Wherein, the inert solvent can be C 6 -C 10 At least one of alkanes or aromatics, preferably at least one of hexane, heptane, octane, decane, benzene, toluene, xylene and their derivatives.
[0043] According to the...
preparation example
[0093] In the following preparation examples, comparative preparation examples, examples and comparative examples:
[0094] 1, molecular weight distribution index Mw / Mn, peak position molecular weight Mp, weight-average molecular weight Mw and Z-average molecular weight Mz adopt the model that British Polymer Laboratories company produces to be the gel permeation chromatography of PL-GPC220 and measure in conjunction with IR5 type infrared detector, wherein , the chromatographic columns in the gel permeation chromatography are three Plgel10μm MIXED-B columns in series, and the solvent and mobile phase are both 1,2,4-trichlorobenzene (containing 0.3g / 1000mL of antioxidant 2,6- Di-tert-butyl-p-cresol), the column temperature is 150°C, the flow rate is 1.0mL / min, and the EasiCal PS-1 narrow distribution polystyrene standard sample produced by PL Company is used for universal calibration.
[0095] Polymer Tailing Index PI HT Calculated according to the following formula (1):
[...
preparation example 1
[0119] This preparation example is used to illustrate the polypropylene provided by the present invention and its preparation method.
[0120] A. Preparation of titanium-containing solid catalyst component: After fully replacing the 16L pressure-resistant reactor with a stirrer with nitrogen, then add 10L ethanol, 300mL of 2-ethylhexanol, 11.2g iodine, 8g Magnesium chloride and 640g of magnesium powder were stirred and mixed evenly, and the system was heated to 75°C for reflux reaction while stirring, and the reaction was stopped until no hydrogen gas was discharged. The obtained reaction product was washed with 3L of ethanol, filtered, and dried to obtain dialkoxymagnesium with an average particle diameter D50 of 30.2 μm, a particle size distribution index SPAN of 0.81, and m of 0.015. Take 650g of the above dialkoxymagnesium, 3250mL of toluene, and 65mL of 2-isopropyl-2-isopentyl-1,3-dimethoxypropane to prepare a suspension. Add 2600mL toluene and 3900mL titanium tetrachlor...
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