CN111978639A - Corrosion-resistant and high-temperature-resistant composite plastic and production process thereof - Google Patents
Corrosion-resistant and high-temperature-resistant composite plastic and production process thereof Download PDFInfo
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Abstract
The invention discloses a corrosion-resistant high-temperature-resistant composite plastic and a production process thereof, wherein the composite plastic is prepared from the following raw materials in parts by weight: 80-100 parts of polypropylene, 50-60 parts of polystyrene, 2-5 parts of heat-resistant filler, 3-5 parts of dispersant, 3-5 parts of plasticizer, 1-3 parts of glass fiber and 0.5-2 parts of antioxidant; the heat-resistant filler is made of a special hexatomic heterocyclic structure containing oxygen and nitrogen and a unique ring-opening curing mechanism, so that the heat-resistant filler has good heat resistance, contains alpha, beta-unsaturated imide groups, has three functionalized sites, can be substituted for polymers of the imide groups by three different groups, further enables the polymers to have good high temperature resistance, and simultaneously takes silicon carbide as a carrier, and the silicon carbide has good heat resistance and corrosion resistance.
Description
Technical Field
The invention belongs to the technical field of plastic preparation, and particularly relates to a corrosion-resistant high-temperature-resistant composite plastic and a production process thereof.
Background
Since the advent of plastics, plastics have rapidly gained wide development and application in many fields such as machinery, automobiles, electronic and electrical appliances, construction, textile, packaging, agriculture, forestry and fishery, food industry and the like, in recent years, along with the rapid development of packaging, electronics, automobiles and other industries, plastics are gradually replacing wood products, the mechanical function of metal has been gradually replaced by high-strength toughness and high wear resistance, in addition, plastics have good grafting and composite functions, and have huge application space in the aspects of concrete, textile, packaging and agriculture, forestry and fishery.
When the existing plastic is used, the polymer is decomposed at high temperature under the high-temperature condition, so that the plastic cannot normally work, and when the plastic is soaked by corrosive liquid in use, skin damage can occur on the surface of the plastic, so that the normal use of the plastic is influenced.
Disclosure of Invention
The invention aims to provide a corrosion-resistant high-temperature-resistant composite plastic and a production process thereof.
The technical problems to be solved by the invention are as follows:
when the existing plastic is used, the polymer is decomposed at high temperature under the high-temperature condition, so that the plastic cannot normally work, and when the plastic is soaked by corrosive liquid in use, skin damage can occur on the surface of the plastic, so that the normal use of the plastic is influenced.
The purpose of the invention can be realized by the following technical scheme:
the corrosion-resistant high-temperature-resistant composite plastic is prepared from the following raw materials in parts by weight: 80-100 parts of polypropylene, 50-60 parts of polystyrene, 2-5 parts of heat-resistant filler, 3-5 parts of dispersant, 3-5 parts of plasticizer, 1-3 parts of glass fiber and 0.5-2 parts of antioxidant;
the composite plastic is prepared by the following steps:
step S1: stirring polypropylene, polystyrene and a dispersing agent for 10-15min at the rotating speed of 300-500r/min to prepare a first mixture;
step S2: stirring the heat-resistant filler, the glass fiber and the antioxidant for 3-5min at the rotation speed of 500-800r/min, adding the plasticizer, and continuously stirring for 10-15min to prepare a second mixture;
step S3: melting and stirring the first mixture and the second mixture for 30-40min at the rotation speed of 1000-1200r/min and the temperature of 240 ℃ to obtain molten materials;
step S4: adding the molten material into a three-section double-screw extruder, extruding, cooling and granulating under the conditions that the temperature of three sections is 240 ℃, 245 ℃ and 250 ℃ respectively to obtain the corrosion-resistant and high-temperature-resistant composite plastic.
Further, the dispersing agent is one or more of sodium tripolyphosphate, sodium hexametaphosphate and sodium pyrophosphate which are mixed in any proportion, the plasticizer is one or two of diethyl phthalate and dibutyl phthalate which are mixed in any proportion, and the antioxidant is one or two of polyphenol antioxidant 1010 and polyphenol antioxidant 1076 which are mixed in any proportion.
Further, the heat-resistant filler is prepared by the following steps:
step A1: adding aniline and acetone into a reaction kettle, stirring at the rotation speed of 120-150r/min until aniline is completely dissolved, adding a sulfuric acid solution at the temperature of 10-15 ℃, stirring at the temperature of 18-20 ℃ for 2-3h, cooling to the temperature of 1-3 ℃, preserving heat for 10-15min, filtering to remove filtrate, drying a filter cake to obtain an intermediate 1, dissolving maleic anhydride in acetone, introducing nitrogen for protection, adding the intermediate 1 at the rotation speed of 150-200r/min and at the temperature of 25-30 ℃, reacting for 6-10h, filtering to remove filtrate, and drying the filter cake to obtain an intermediate 2;
the reaction process is as follows:
step A2: dissolving the intermediate 2 prepared in the step A1 in acetone, stirring and adding triethylamine, sodium acetate and acetic anhydride under the conditions of the rotation speed of 120-150r/min and the temperature of 55-60 ℃, stirring for 3-5h, adding deionized water, standing for 5-10min, filtering to remove filtrate to prepare an intermediate 3, adding the intermediate 3 and carbon tetrachloride into a reaction kettle, introducing chlorine under the conditions of the rotation speed of 200-300r/min and illumination, reacting for 20-30min, adding a potassium carbonate solution and tetraethylammonium bromide, performing reflux reaction at the temperature of 80-85 ℃ for 1-2h, and distilling to remove the carbon tetrachloride to prepare an intermediate 4;
the reaction process is as follows:
step A3: adding deionized water into a reaction kettle, adjusting the pH value to be 8-9, adding paraformaldehyde, stirring at the rotation speed of 120-150r/min and the temperature of 70-80 ℃ for 5-10min, adding p-methylphenol and toluene, continuously stirring for 5-10min, adding a saturated aqueous solution of methylamine, stirring at the temperature of 80-85 ℃ for 3-5h, adjusting the pH value of the reaction solution to be 7, cooling to room temperature, standing for 10-15min, filtering to remove filtrate to obtain an intermediate 5, adding the intermediate 5 and carbon tetrachloride into the reaction kettle, introducing chlorine gas at the rotation speed of 200-300r/min under illumination for reaction for 20-30min, adding a potassium carbonate solution and tetraethylammonium bromide, carrying out reflux reaction at the temperature of 80-85 ℃ for 1-2h, distilling to remove carbon tetrachloride to obtain an intermediate 6;
the reaction process is as follows:
step A4: dissolving cyanuric chloride in acetone, adding the intermediate 4 prepared in the step A2, stirring for 2-3h under the conditions that the rotation speed is 120-150 DEG, the temperature is 40-50 ℃ and the pH value is 7-8, adding the intermediate 6 prepared in the step A3, reacting for 2-3h under the condition that the temperature is 80-90 ℃ to prepare an intermediate 7, dissolving the intermediate 7 in carbon tetrachloride, stirring and adding a potassium permanganate solution under the conditions that the rotation speed is 120-150 DEG, the temperature is 90-95 ℃, reacting for 5-6h, filtering to remove filtrate, and drying a filter cake to prepare an intermediate 8;
the reaction process is as follows:
step A5: dispersing silicon carbide powder in deionized water, adding gamma-aminopropyltriethoxysilane at the rotation speed of 300-500r/min and the temperature of 60-65 ℃, reacting for 2-3h, adding the intermediate 8, dimethyl sulfoxide and 1-hydroxybenzotriazole prepared in the step A4, reacting for 3-5h, filtering to remove filtrate, grinding a filter cake to pass through a 5-10 mu m screen, and drying to obtain the heat-resistant filler.
Further, the molar ratio of the aniline to the acetone in the step A1 is 1:1, the amount of the sulfuric acid solution is 20-30% of the sum of the aniline and the acetone, the mass fraction of the sulfuric acid solution is 70-75%, and the molar ratio of the intermediate 1 to the maleic anhydride is 1: 2.
Further, the molar ratio of the amount of the intermediate 2, triethylamine and acetic anhydride in the step A2 is 1:0.2:2.5, the amount of sodium acetate is 20-25% of the mass of the intermediate 2, the amount of acetone is 50-60% of the mass of the intermediate 2, the amount of deionized water is 30-40% of the mass of acetone, the molar ratio of the amount of the intermediate 3 to chlorine is 2:1, the amount of the potassium carbonate solution is 1-3 times of the mass of the intermediate 3, the mass fraction of the potassium carbonate solution is 5-10%, and the amount of tetraethylammonium bromide is 10-15% of the mass of the intermediate 3.
Further, the mass ratio of the paraformaldehyde to the p-methylphenol to the methylamine in the step A3 is 1:5:0.8, the molar ratio of the intermediate 5 to the chlorine is 2:1, the mass of the potassium carbonate solution is 1-3 times of that of the intermediate 5, the mass fraction of the potassium carbonate solution is 5-10%, and the mass fraction of the tetraethylammonium bromide is 10-15% of that of the intermediate 5.
Further, the molar ratio of the cyanuric chloride to the intermediate 4 to the intermediate 6 in the step A4 is 1:2:1, the amount of the potassium permanganate solution is 5-6 times of the intermediate 7, and the mass fraction of the potassium permanganate solution is 10-15%.
Further, the dosage of the gamma-aminopropyltriethoxysilane in the step A5 is 3-5% of the mass of the silicon carbide powder, the dosage mass ratio of the intermediate 8 to the silicon carbide powder is 1:1, and the dosage of the 1-hydroxybenzotriazole is 30-50% of the sum of the mass of the intermediate 8 and the silicon carbide powder.
A production process of corrosion-resistant high-temperature-resistant composite plastic specifically comprises the following steps:
step S1: stirring polypropylene, polystyrene and a dispersing agent for 10-15min at the rotating speed of 300-500r/min to prepare a first mixture;
step S2: stirring the heat-resistant filler, the glass fiber and the antioxidant for 3-5min at the rotation speed of 500-800r/min, adding the plasticizer, and continuously stirring for 10-15min to prepare a second mixture;
step S3: melting and stirring the first mixture and the second mixture for 30-40min at the rotation speed of 1000-1200r/min and the temperature of 240 ℃ to obtain molten materials;
step S4: adding the molten material into a three-section double-screw extruder, extruding, cooling and granulating under the conditions that the temperature of three sections is 240 ℃, 245 ℃ and 250 ℃ respectively to obtain the corrosion-resistant and high-temperature-resistant composite plastic.
The invention has the beneficial effects that: the invention prepares a high temperature resistant filler in the process of preparing a corrosion resistant and high temperature resistant composite plastic, aniline and acetone are used as raw materials to react to prepare an intermediate 1, the intermediate 1 reacts with maleic anhydride to prepare an intermediate 2, the intermediate 2 further reacts to prepare an intermediate 3, the intermediate 3 reacts to ensure that one of methyl groups is connected with a hydroxyl group to prepare an intermediate 4, then p-toluidine and methylamine are used as raw materials to prepare an intermediate 5, the intermediate 5 further reacts to ensure that the methyl group on a nitrogen atom is connected with the hydroxyl group to prepare an intermediate 6, cyanuric chloride, the intermediate 4 and the intermediate 6 react to ensure that molecules of the intermediate 4 and the intermediate 6 are grafted on cyanuric chloride molecules to prepare an intermediate 7, and then the intermediate 7 is oxidized with potassium permanganate to oxidize partial methyl groups on the molecules of the intermediate 7 into carboxyl groups to prepare an intermediate 8, performing surface treatment on silicon carbide by using gamma-aminopropyltriethoxysilane to ensure that the silicon carbide surface contains a large amount of amino groups, further reacting with an intermediate 8 to ensure that carboxyl groups on molecules of the intermediate 8 react with the amino groups to prepare a heat-resistant filler, wherein the heat-resistant filler contains a special hexahydric heterocyclic structure formed by oxygen and nitrogen and a unique ring-opening curing mechanism, so that the heat-resistant filler has good heat resistance and contains an alpha, beta-unsaturated imide group, the group has three functionalized sites and can be used for substituting an imide group polymer by three different groups at the same time, further the polymer has good high temperature resistance, and meanwhile, the silicon carbide is used as a carrier and has good heat resistance and corrosion resistance, so that the heat resistance and the corrosion resistance of the plastic are further improved; and the corrosion resistance of the prepared plastic is further improved by using polypropylene and polystyrene as raw materials.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The corrosion-resistant high-temperature-resistant composite plastic is prepared from the following raw materials in parts by weight: 80 parts of polypropylene, 50 parts of polystyrene, 2 parts of heat-resistant filler, 3 parts of sodium tripolyphosphate, 3 parts of diethyl phthalate, 1 part of glass fiber and 0.5 part of polyphenol antioxidant 1010;
the composite plastic is prepared by the following steps:
step S1: stirring polypropylene, polystyrene and sodium tripolyphosphate for 10min at the rotating speed of 300r/min to prepare a first mixture;
step S2: stirring the heat-resistant filler, the glass fiber and the polyphenol antioxidant 1010 for 3min at the rotation speed of 500r/min, adding diethyl phthalate, and continuously stirring for 10min to prepare a second mixture;
step S3: melting and stirring the first mixture and the second mixture for 30min under the conditions that the rotating speed is 1000r/min and the temperature is 240 ℃ to prepare molten materials;
step S4: adding the molten material into a three-section double-screw extruder, extruding, cooling and granulating under the conditions that the temperature of three sections is 240 ℃, 245 ℃ and 250 ℃ respectively to obtain the corrosion-resistant and high-temperature-resistant composite plastic.
The heat-resistant filler is prepared by the following steps:
step A1: adding aniline and acetone into a reaction kettle, stirring at the rotation speed of 120r/min until aniline is completely dissolved, adding a sulfuric acid solution at the temperature of 10 ℃, stirring at the temperature of 18 ℃ for 2 hours, cooling to the temperature of 1 ℃, preserving heat for 10 minutes, filtering to remove filtrate, drying a filter cake to obtain an intermediate 1, dissolving maleic anhydride in acetone, introducing nitrogen for protection, adding the intermediate 1 at the rotation speed of 150r/min at the temperature of 25 ℃, reacting for 6 hours, filtering to remove filtrate, and drying the filter cake to obtain an intermediate 2;
step A2: dissolving the intermediate 2 prepared in the step A1 in acetone, stirring and adding triethylamine, sodium acetate and acetic anhydride under the conditions of the rotation speed of 120r/min and the temperature of 55 ℃, stirring for 3 hours, adding deionized water, standing for 5 minutes, filtering to remove filtrate to prepare an intermediate 3, adding the intermediate 3 and carbon tetrachloride into a reaction kettle, introducing chlorine under the conditions of the rotation speed of 200r/min and illumination, reacting for 20 minutes, adding a potassium carbonate solution and tetraethylammonium bromide, refluxing at the temperature of 80 ℃ for 1 hour, and distilling to remove the carbon tetrachloride to prepare an intermediate 4;
step A3: adding deionized water into a reaction kettle, adjusting the pH value to be 8, adding paraformaldehyde, stirring for 5min at the rotation speed of 120r/min and the temperature of 70 ℃, adding p-methylphenol and toluene, continuously stirring for 5min, adding a saturated aqueous solution of methylamine, stirring for 3h at the temperature of 80 ℃, adjusting the pH value of a reaction solution to be 7, cooling to room temperature, standing for 10min, filtering to remove filtrate to obtain an intermediate 5, adding the intermediate 5 and carbon tetrachloride into the reaction kettle, introducing chlorine gas at the rotation speed of 200r/min and under the illumination condition, reacting for 20min, adding a potassium carbonate solution and tetraethylammonium bromide, performing reflux reaction for 1h at the temperature of 80 ℃, and distilling to remove the carbon tetrachloride to obtain an intermediate 6;
step A4: dissolving cyanuric chloride in acetone, adding the intermediate 4 prepared in the step A2, stirring for 2 hours at the rotation speed of 120r/min, the temperature of 40 ℃ and the pH value of 7, adding the intermediate 6 prepared in the step A3, reacting for 2 hours at the temperature of 80 ℃ to prepare an intermediate 7, dissolving the intermediate 7 in carbon tetrachloride, stirring and adding a potassium permanganate solution at the rotation speed of 120r/min and the temperature of 90 ℃, reacting for 5 hours, filtering to remove filtrate, and drying a filter cake to prepare an intermediate 8;
step A5: dispersing silicon carbide powder in deionized water, adding gamma-aminopropyltriethoxysilane at the rotation speed of 300r/min and the temperature of 60 ℃, reacting for 2 hours, adding the intermediate 8 prepared in the step A4, dimethyl sulfoxide and 1-hydroxybenzotriazole, reacting for 3 hours, filtering to remove filtrate, grinding a filter cake through a 5-micrometer screen, and drying to obtain the heat-resistant filler.
Example 2
The corrosion-resistant high-temperature-resistant composite plastic is prepared from the following raw materials in parts by weight: 90 parts of polypropylene, 55 parts of polystyrene, 3 parts of heat-resistant filler, 4 parts of sodium tripolyphosphate, 4 parts of diethyl phthalate, 2 parts of glass fiber and 1 part of polyphenol antioxidant 1010;
the composite plastic is prepared by the following steps:
step S1: stirring polypropylene, polystyrene and sodium tripolyphosphate for 10min at the rotating speed of 500r/min to prepare a first mixture;
step S2: stirring the heat-resistant filler, the glass fiber and the polyphenol antioxidant 1010 for 3min at the rotating speed of 800r/min, adding diethyl phthalate, and continuously stirring for 10min to prepare a second mixture;
step S3: melting and stirring the first mixture and the second mixture for 30min under the conditions that the rotating speed is 1200r/min and the temperature is 240 ℃ to prepare molten materials;
step S4: adding the molten material into a three-section double-screw extruder, extruding, cooling and granulating under the conditions that the temperature of three sections is 240 ℃, 245 ℃ and 250 ℃ respectively to obtain the corrosion-resistant and high-temperature-resistant composite plastic.
The heat-resistant filler is prepared by the following steps:
step A1: adding aniline and acetone into a reaction kettle, stirring at the rotation speed of 120r/min until aniline is completely dissolved, adding a sulfuric acid solution at the temperature of 15 ℃, stirring at the temperature of 18 ℃ for 3 hours, cooling to the temperature of 1 ℃, keeping the temperature for 15 minutes, filtering to remove filtrate, drying a filter cake to obtain an intermediate 1, dissolving maleic anhydride in acetone, introducing nitrogen for protection, adding the intermediate 1 at the rotation speed of 150r/min and at the temperature of 30 ℃, reacting for 6 hours, filtering to remove filtrate, and drying the filter cake to obtain an intermediate 2;
step A2: dissolving the intermediate 2 prepared in the step A1 in acetone, stirring and adding triethylamine, sodium acetate and acetic anhydride under the conditions of the rotation speed of 150r/min and the temperature of 55 ℃, stirring for 5 hours, adding deionized water, standing for 5 minutes, filtering to remove filtrate to prepare an intermediate 3, adding the intermediate 3 and carbon tetrachloride into a reaction kettle, introducing chlorine under the conditions of the rotation speed of 300r/min and illumination, reacting for 20 minutes, adding a potassium carbonate solution and tetraethylammonium bromide, refluxing at the temperature of 85 ℃ for 1 hour, and distilling to remove the carbon tetrachloride to prepare an intermediate 4;
step A3: adding deionized water into a reaction kettle, adjusting the pH value to be 9, adding paraformaldehyde, stirring for 5min at the rotation speed of 120r/min and the temperature of 80 ℃, adding p-methylphenol and toluene, continuously stirring for 10min, adding a saturated aqueous solution of methylamine, stirring for 5h at the temperature of 80 ℃, adjusting the pH value of a reaction solution to be 7, cooling to room temperature, standing for 10min, filtering to remove filtrate to obtain an intermediate 5, adding the intermediate 5 and carbon tetrachloride into the reaction kettle, introducing chlorine gas at the rotation speed of 300r/min and under the illumination condition, reacting for 20min, adding a potassium carbonate solution and tetraethylammonium bromide, performing reflux reaction for 1h at the temperature of 85 ℃, and distilling to remove the carbon tetrachloride to obtain an intermediate 6;
step A4: dissolving cyanuric chloride in acetone, adding the intermediate 4 prepared in the step A2, stirring for 3 hours at the rotation speed of 120r/min, the temperature of 50 ℃ and the pH value of 7, adding the intermediate 6 prepared in the step A3, reacting for 2 hours at the temperature of 90 ℃ to prepare an intermediate 7, dissolving the intermediate 7 in carbon tetrachloride, stirring and adding a potassium permanganate solution at the rotation speed of 150r/min and the temperature of 90 ℃, reacting for 6 hours, filtering to remove filtrate, and drying a filter cake to prepare an intermediate 8;
step A5: dispersing silicon carbide powder in deionized water, adding gamma-aminopropyltriethoxysilane at the rotation speed of 500r/min and the temperature of 60 ℃, reacting for 3 hours, adding the intermediate 8 prepared in the step A4, dimethyl sulfoxide and 1-hydroxybenzotriazole, reacting for 3 hours, filtering to remove filtrate, grinding a filter cake through a 10-micron screen, and drying to obtain the heat-resistant filler.
Example 3
The corrosion-resistant high-temperature-resistant composite plastic is prepared from the following raw materials in parts by weight: 100 parts of polypropylene, 60 parts of polystyrene, 5 parts of heat-resistant filler, 5 parts of sodium tripolyphosphate, 5 parts of diethyl phthalate, 3 parts of glass fiber and 2 parts of polyphenol antioxidant 1010;
the composite plastic is prepared by the following steps:
step S1: stirring polypropylene, polystyrene and sodium tripolyphosphate for 15min at the rotating speed of 500r/min to prepare a first mixture;
step S2: stirring the heat-resistant filler, the glass fiber and the polyphenol antioxidant 1010 for 5min at the rotating speed of 800r/min, adding diethyl phthalate, and continuously stirring for 15min to prepare a second mixture;
step S3: melting and stirring the first mixture and the second mixture for 40min under the conditions that the rotating speed is 1200r/min and the temperature is 240 ℃ to prepare molten materials;
step S4: adding the molten material into a three-section double-screw extruder, extruding, cooling and granulating under the conditions that the temperature of three sections is 240 ℃, 245 ℃ and 250 ℃ respectively to obtain the corrosion-resistant and high-temperature-resistant composite plastic.
The heat-resistant filler is prepared by the following steps:
step A1: adding aniline and acetone into a reaction kettle, stirring at the rotation speed of 150r/min until aniline is completely dissolved, adding a sulfuric acid solution at the temperature of 15 ℃, stirring at the temperature of 20 ℃ for 3 hours, cooling to the temperature of 3 ℃, keeping the temperature for 15 minutes, filtering to remove filtrate, drying a filter cake to obtain an intermediate 1, dissolving maleic anhydride in acetone, introducing nitrogen for protection, adding the intermediate 1 at the rotation speed of 200r/min and at the temperature of 30 ℃, reacting for 10 hours, filtering to remove filtrate, and drying the filter cake to obtain an intermediate 2;
step A2: dissolving the intermediate 2 prepared in the step A1 in acetone, stirring and adding triethylamine, sodium acetate and acetic anhydride under the conditions of the rotation speed of 150r/min and the temperature of 60 ℃, stirring for 5 hours, adding deionized water, standing for 10 minutes, filtering to remove filtrate to prepare an intermediate 3, adding the intermediate 3 and carbon tetrachloride into a reaction kettle, introducing chlorine under the conditions of the rotation speed of 300r/min and illumination, reacting for 30 minutes, adding a potassium carbonate solution and tetraethylammonium bromide, refluxing at the temperature of 85 ℃ for 2 hours, and distilling to remove the carbon tetrachloride to prepare an intermediate 4;
step A3: adding deionized water into a reaction kettle, adjusting the pH value to be 9, adding paraformaldehyde, stirring for 10min at the rotation speed of 150r/min and the temperature of 80 ℃, adding p-methylphenol and toluene, continuously stirring for 10min, adding a saturated aqueous solution of methylamine, stirring for 5h at the temperature of 85 ℃, adjusting the pH value of a reaction solution to be 7, cooling to room temperature, standing for 15min, filtering to remove filtrate to obtain an intermediate 5, adding the intermediate 5 and carbon tetrachloride into the reaction kettle, introducing chlorine gas at the rotation speed of 300r/min and under the illumination condition, reacting for 30min, adding a potassium carbonate solution and tetraethylammonium bromide, performing reflux reaction for 2h at the temperature of 85 ℃, and distilling to remove the carbon tetrachloride to obtain an intermediate 6;
step A4: dissolving cyanuric chloride in acetone, adding the intermediate 4 prepared in the step A2, stirring for 3 hours at the rotation speed of 150r/min, the temperature of 50 ℃ and the pH value of 8, adding the intermediate 6 prepared in the step A3, reacting for 3 hours at the temperature of 90 ℃ to prepare an intermediate 7, dissolving the intermediate 7 in carbon tetrachloride, stirring and adding a potassium permanganate solution at the rotation speed of 150r/min and the temperature of 95 ℃, reacting for 6 hours, filtering to remove filtrate, and drying a filter cake to prepare an intermediate 8;
step A5: dispersing silicon carbide powder in deionized water, adding gamma-aminopropyltriethoxysilane at the rotation speed of 500r/min and the temperature of 65 ℃, reacting for 3 hours, adding the intermediate 8 prepared in the step A4, dimethyl sulfoxide and 1-hydroxybenzotriazole, reacting for 5 hours, filtering to remove filtrate, grinding a filter cake through a 10-micron screen, and drying to obtain the heat-resistant filler.
Comparative example
The comparative example is a common plastic on the market.
The plastics prepared in examples 1 to 3 and comparative example were subjected to performance tests, the test results of which are shown in table 1 below;
TABLE 1
From the above table 1, it can be seen that the maximum decomposition temperature of the plastic prepared in examples 1-3 is 293-.
The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.
Claims (9)
1. The corrosion-resistant high-temperature-resistant composite plastic is characterized in that: the feed is prepared from the following raw materials in parts by weight: 80-100 parts of polypropylene, 50-60 parts of polystyrene, 2-5 parts of heat-resistant filler, 3-5 parts of dispersant, 3-5 parts of plasticizer, 1-3 parts of glass fiber and 0.5-2 parts of antioxidant;
the composite plastic is prepared by the following steps:
step S1: stirring polypropylene, polystyrene and a dispersing agent for 10-15min at the rotating speed of 300-500r/min to prepare a first mixture;
step S2: stirring the heat-resistant filler, the glass fiber and the antioxidant for 3-5min at the rotation speed of 500-800r/min, adding the plasticizer, and continuously stirring for 10-15min to prepare a second mixture;
step S3: melting and stirring the first mixture and the second mixture for 30-40min at the rotation speed of 1000-1200r/min and the temperature of 240 ℃ to obtain molten materials;
step S4: adding the molten material into a three-section double-screw extruder, extruding, cooling and granulating under the conditions that the temperature of three sections is 240 ℃, 245 ℃ and 250 ℃ respectively to obtain the corrosion-resistant and high-temperature-resistant composite plastic.
2. The corrosion-resistant high-temperature-resistant composite plastic as claimed in claim 1, wherein: the dispersing agent is one or more of sodium tripolyphosphate, sodium hexametaphosphate and sodium pyrophosphate which are mixed in any proportion, the plasticizer is one or two of diethyl phthalate and dibutyl phthalate which are mixed in any proportion, and the antioxidant is one or two of polyphenol antioxidant 1010 and polyphenol antioxidant 1076 which are mixed in any proportion.
3. The corrosion-resistant high-temperature-resistant composite plastic as claimed in claim 1, wherein: the heat-resistant filler is prepared by the following steps:
step A1: adding aniline and acetone into a reaction kettle, stirring at the rotation speed of 120-150r/min until aniline is completely dissolved, adding a sulfuric acid solution at the temperature of 10-15 ℃, stirring at the temperature of 18-20 ℃ for 2-3h, cooling to the temperature of 1-3 ℃, preserving heat for 10-15min, filtering to remove filtrate, drying a filter cake to obtain an intermediate 1, dissolving maleic anhydride in acetone, introducing nitrogen for protection, adding the intermediate 1 at the rotation speed of 150-200r/min and at the temperature of 25-30 ℃, reacting for 6-10h, filtering to remove filtrate, and drying the filter cake to obtain an intermediate 2;
step A2: dissolving the intermediate 2 prepared in the step A1 in acetone, stirring and adding triethylamine, sodium acetate and acetic anhydride under the conditions of the rotation speed of 120-150r/min and the temperature of 55-60 ℃, stirring for 3-5h, adding deionized water, standing for 5-10min, filtering to remove filtrate to prepare an intermediate 3, adding the intermediate 3 and carbon tetrachloride into a reaction kettle, introducing chlorine under the conditions of the rotation speed of 200-300r/min and illumination, reacting for 20-30min, adding a potassium carbonate solution and tetraethylammonium bromide, performing reflux reaction at the temperature of 80-85 ℃ for 1-2h, and distilling to remove the carbon tetrachloride to prepare an intermediate 4;
step A3: adding deionized water into a reaction kettle, adjusting the pH value to be 8-9, adding paraformaldehyde, stirring at the rotation speed of 120-150r/min and the temperature of 70-80 ℃ for 5-10min, adding p-methylphenol and toluene, continuously stirring for 5-10min, adding a saturated aqueous solution of methylamine, stirring at the temperature of 80-85 ℃ for 3-5h, adjusting the pH value of the reaction solution to be 7, cooling to room temperature, standing for 10-15min, filtering to remove filtrate to obtain an intermediate 5, adding the intermediate 5 and carbon tetrachloride into the reaction kettle, introducing chlorine gas at the rotation speed of 200-300r/min under illumination for reaction for 20-30min, adding a potassium carbonate solution and tetraethylammonium bromide, carrying out reflux reaction at the temperature of 80-85 ℃ for 1-2h, distilling to remove carbon tetrachloride to obtain an intermediate 6;
step A4: dissolving cyanuric chloride in acetone, adding the intermediate 4 prepared in the step A2, stirring for 2-3h under the conditions that the rotation speed is 120-150 DEG, the temperature is 40-50 ℃ and the pH value is 7-8, adding the intermediate 6 prepared in the step A3, reacting for 2-3h under the condition that the temperature is 80-90 ℃ to prepare an intermediate 7, dissolving the intermediate 7 in carbon tetrachloride, stirring and adding a potassium permanganate solution under the conditions that the rotation speed is 120-150 DEG, the temperature is 90-95 ℃, reacting for 5-6h, filtering to remove filtrate, and drying a filter cake to prepare an intermediate 8;
step A5: dispersing silicon carbide powder in deionized water, adding gamma-aminopropyltriethoxysilane at the rotation speed of 300-500r/min and the temperature of 60-65 ℃, reacting for 2-3h, adding the intermediate 8, dimethyl sulfoxide and 1-hydroxybenzotriazole prepared in the step A4, reacting for 3-5h, filtering to remove filtrate, grinding a filter cake to pass through a 5-10 mu m screen, and drying to obtain the heat-resistant filler.
4. The corrosion-resistant high-temperature-resistant composite plastic according to claim 3, wherein: the molar ratio of the aniline to the acetone in the step A1 is 1:1, the dosage of the sulfuric acid solution is 20-30% of the sum of the mass of the aniline and the acetone, the mass fraction of the sulfuric acid solution is 70-75%, and the molar ratio of the intermediate 1 to the maleic anhydride is 1: 2.
5. The corrosion-resistant high-temperature-resistant composite plastic according to claim 3, wherein: the molar ratio of the using amount of the intermediate 2, triethylamine and acetic anhydride in the step A2 is 1:0.2:2.5, the using amount of sodium acetate is 20-25% of the mass of the intermediate 2, the using amount of acetone is 50-60% of the mass of the intermediate 2, the using amount of deionized water is 30-40% of the mass of acetone, the using amount of the intermediate 3 and chlorine is 2:1, the using amount of a potassium carbonate solution is 1-3 times of the mass of the intermediate 3, the mass fraction of the potassium carbonate solution is 5-10%, and the using amount of tetraethylammonium bromide is 10-15% of the mass of the intermediate 3.
6. The corrosion-resistant high-temperature-resistant composite plastic according to claim 3, wherein: the mass ratio of the paraformaldehyde to the p-methylphenol to the methylamine in the step A3 is 1:5:0.8, the molar ratio of the intermediate 5 to the chlorine is 2:1, the mass of the potassium carbonate solution is 1-3 times of that of the intermediate 5, the mass fraction of the potassium carbonate solution is 5-10%, and the mass fraction of the tetraethylammonium bromide is 10-15% of that of the intermediate 5.
7. The corrosion-resistant high-temperature-resistant composite plastic according to claim 3, wherein: the molar ratio of the cyanuric chloride to the intermediate 4 to the intermediate 6 in the step A4 is 1:2:1, the amount of the potassium permanganate solution is 5-6 times of the amount of the intermediate 7, and the mass fraction of the potassium permanganate solution is 10-15%.
8. The corrosion-resistant high-temperature-resistant composite plastic according to claim 3, wherein: the dosage of the gamma-aminopropyl triethoxysilane in the step A5 is 3-5% of the mass of the silicon carbide powder, the dosage mass ratio of the intermediate 8 to the silicon carbide powder is 1:1, and the dosage of the 1-hydroxybenzotriazole is 30-50% of the sum of the mass of the intermediate 8 and the silicon carbide powder.
9. The production process of the corrosion-resistant high-temperature-resistant composite plastic according to claim 1, characterized by comprising the following steps of: the method specifically comprises the following steps:
step S1: stirring polypropylene, polystyrene and a dispersing agent for 10-15min at the rotating speed of 300-500r/min to prepare a first mixture;
step S2: stirring the heat-resistant filler, the glass fiber and the antioxidant for 3-5min at the rotation speed of 500-800r/min, adding the plasticizer, and continuously stirring for 10-15min to prepare a second mixture;
step S3: melting and stirring the first mixture and the second mixture for 30-40min at the rotation speed of 1000-1200r/min and the temperature of 240 ℃ to obtain molten materials;
step S4: adding the molten material into a three-section double-screw extruder, extruding, cooling and granulating under the conditions that the temperature of three sections is 240 ℃, 245 ℃ and 250 ℃ respectively to obtain the corrosion-resistant and high-temperature-resistant composite plastic.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112646269A (en) * | 2020-12-17 | 2021-04-13 | 安徽强旭塑业科技有限公司 | Environment-friendly high-flame-retardant battery case and preparation method thereof |
| CN113308096A (en) * | 2021-07-12 | 2021-08-27 | 扬州天启新材料股份有限公司 | Corrosion-resistant polyarylate composite material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112646269A (en) * | 2020-12-17 | 2021-04-13 | 安徽强旭塑业科技有限公司 | Environment-friendly high-flame-retardant battery case and preparation method thereof |
| CN112646269B (en) * | 2020-12-17 | 2023-04-28 | 安徽强旭塑业科技有限公司 | Environment-friendly high-flame-retardance battery shell and preparation method thereof |
| CN113308096A (en) * | 2021-07-12 | 2021-08-27 | 扬州天启新材料股份有限公司 | Corrosion-resistant polyarylate composite material and preparation method thereof |
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