CN112143094B - Regenerated polyolefin plastic composition and preparation method and application thereof - Google Patents
Regenerated polyolefin plastic composition and preparation method and application thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/20—Recycled plastic
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Abstract
The invention discloses a regenerated polyolefin plastic composition and a preparation method and application thereof, wherein the regenerated polyolefin plastic composition is prepared from 100 parts of regenerated polypropylene, 10-100 parts of regenerated polyethylene, 10-30 parts of glass fiber, 1-5 parts of 2-ethylhexyl diphenyl phosphate, 10100.1-0.5 part of antioxidant, 1680.1-0.5 part of antioxidant and 0.5-2 parts of lubricant according to parts by weight.
Description
Technical Field
The invention belongs to the field of engineering plastics, and particularly relates to a regenerated polyolefin plastic composition, and a preparation method and application thereof.
Background
In recent years, with the continuous progress of polymer synthesis technology, the plastic industry has been rapidly developed, and more plastic products have entered the field of vision and become indispensable substances for people's life. But also brings great negative effect to people, the amount of waste plastics is increased rapidly, and white pollution, municipal refuse mines and the like are continuously generated in our lives. The recycling of waste plastics is always an important content for developing recycling economy and is also an important way for realizing sustainable development advocated by the nation.
At present, waste plastics are applied to a certain extent, but relevant reports show that about 1400T of waste plastics are not recycled every year in China, and the regeneration utilization rate is only 25%. Although the use of the waste plastics is changed to a certain extent by the recycled plastics which are simply recycled or blended, the recycled plastics still have a plurality of defects. For example, the material is aged and degraded due to long-term use, and the loss of properties such as strength, hardness, impact toughness, heat resistance and the like of the material is large.
Disclosure of Invention
In view of the above, the invention provides a regenerated polyolefin plastic composition and a preparation method and application thereof, and the regenerated polyolefin plastic composition can play a role in strengthening and also has a toughening effect by adding 2-ethylhexyl diphenyl phosphate in a formula, so that the problems of poor toughness, low strength and poor stability of waste polyolefin materials are solved.
In order to achieve the above purpose, the regenerated polyolefin plastic composition of the present invention is prepared from the following components in parts by weight:
further, the combustion residue of the regenerated polypropylene is less than 2%, and the melt index of the regenerated polypropylene under the conditions of 2.16kg and 230 ℃ is 30-60 g/10 min.
Further, the combustion residue of the regenerated polyethylene is less than 2%, and the melt index of the regenerated polyethylene is 20-30 g/10min under the conditions of 2.16kg and 230 ℃.
Furthermore, the glass fiber is alkali-free glass fiber, and the monofilament diameter of the alkali-free glass fiber is 5-10 microns. The glass fiber is generally divided into alkali-free glass fiber, medium-alkali glass fiber and high-alkali glass fiber according to the content of alkali, wherein the alkali-free glass fiber has excellent chemical stability, electrical insulation performance and strength. In addition, the monofilament diameter of the glass fiber is generally several micrometers to twenty micrometers, and in the invention, the glass fiber with the monofilament diameter of 5-10 μm is preferably adopted in consideration of balance between cost and performance improvement.
Further, the lubricant is white oil or ethylene bis stearamide.
Another object of the present invention is to provide a method for preparing the above recycled polyolefin plastic composition, comprising the steps of:
(1) uniformly premixing the regenerated polypropylene, the regenerated polyethylene, the 2-ethylhexyl diphenyl phosphate, the antioxidant 1010 and the antioxidant 168 according to the proportion, adding the lubricant according to the proportion, and uniformly mixing again to obtain a mixed material; the other components are firstly premixed, and then the premixed material is mixed with the lubricant, so that the lubricating effect of the mixed material is better.
(2) And adding the mixed material into a double-screw extruder, adding glass fiber through a glass fiber adding port according to a ratio, and performing extrusion, water cooling, grain cutting and drying to obtain the regenerated polyolefin plastic composition.
Preferably, in the step (1), the temperature of the premixing is controlled to be 20-40 ℃, the rotating speed is 1000-2000 r/min, and the mixing time is 3-5 min;
the mixing speed is 300-500 r/min, and the mixing time is 1-2 min.
Preferably, in the step (2), the temperatures of all zones of the twin-screw extruder are as follows: 140-150 ℃ in the first area, 150-160 ℃ in the second area, 185-195 ℃ in the third area, 200-210 ℃ in the fourth area, 190-195 ℃ in the fifth area, 190-200 ℃ in the sixth area, and 500-1000 rpm in the rotating speed.
The third object of the present invention is to provide the use of the above recycled polyolefin plastic composition for preparing an automotive product, including one of an automobile bumper, an automobile door panel, and an instrument panel.
Compared with the prior art, the invention has the following beneficial effects:
(1) the 2-ethylhexyl diphenyl phosphate is added into the composition, so that the toughness of the polyolefin composition is greatly improved, and particularly the impact strength of the polyolefin composition is improved; meanwhile, the tensile strength and the bending strength of the polyolefin composition can be improved.
(2) In the invention, a large amount of regenerated polypropylene and regenerated polyethylene are added, so that the waste plastics are recycled, and the ecological environment is further protected.
(3) Compared with the use of new raw materials, the cost can be greatly reduced under the condition of not losing performance.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the specific embodiments illustrated. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The combustion residue of the regenerated polypropylene in the following examples and examples is less than 2%, and the melt index is 30-60 g/10min (2.16kg, 230 ℃); the combustion residue of the regenerated polyethylene is less than 2%, and the melt index is 20-30 g/10min (2.16kg, 230 ℃); the glass fiber is alkali-free glass fiber, the monofilament diameter is 5-10 mu m, and the glass fiber is a commercially available product.
Example 1
Pouring 100 parts of regenerated polypropylene, 10 parts of regenerated polyethylene, 1 part of 2-ethylhexyl diphenyl phosphate, 10100.1 parts of antioxidant and 1680.1 parts of antioxidant into a high-speed mixer according to the parts by weight, mixing, controlling the temperature at 20 ℃, rotating speed at 1000r/min, and mixing for 3 min; opening the mixer, adding 0.5 part of white oil, mixing again at the rotating speed of 300r/min for 1min to obtain a mixed material;
and feeding the mixed material into a double-screw extruder through a main feeding port, adding 10 parts of glass fiber through a side feeding port, extruding, water cooling, granulating and drying to obtain the regenerated polyolefin plastic composition. Wherein the temperature of the twin-screw extruder is set as follows: 140 ℃ in the first zone, 150 ℃ in the second zone, 185 ℃ in the third zone, 200 ℃ in the fourth zone, 190 ℃ in the fifth zone, 190 ℃ in the sixth zone and 500 rpm in rotation speed.
Example 2
Pouring 100 parts of regenerated polypropylene, 30 parts of regenerated polyethylene, 5 parts of 2-ethylhexyl diphenyl phosphate, 10100.2 parts of antioxidant and 1680.5 parts of antioxidant into a high-speed mixer according to the parts by weight, mixing, controlling the temperature at 40 ℃, rotating speed at 2000r/min, and mixing for 5 min; opening the mixer, adding 2 parts of white oil, mixing again at a rotating speed of 500r/min for 2min to obtain a mixed material;
and feeding the mixed material into a double-screw extruder through a main feeding port, adding 18 parts of glass fiber through a side feeding port, extruding, water cooling, granulating and drying to obtain the regenerated polyolefin plastic composition. Wherein the temperature of the twin-screw extruder is set as follows: 150 ℃ in the first zone, 160 ℃ in the second zone, 195 ℃ in the third zone, 210 ℃ in the fourth zone, 195 ℃ in the fifth zone, 200 ℃ in the sixth zone and 1000 rpm.
Example 3
Pouring 100 parts of regenerated polypropylene, 50 parts of regenerated polyethylene, 3 parts of 2-ethylhexyl diphenyl phosphate, 10100.4 parts of antioxidant and 1680.2 parts of antioxidant into a high-speed mixer according to the parts by weight, mixing, controlling the temperature at 30 ℃, rotating speed at 1500r/min, and mixing for 4 min; opening the mixer, adding 1 part of white oil, mixing again at the rotating speed of 400r/min for 1min to obtain a mixed material;
and feeding the mixed material into a double-screw extruder through a main feeding port, adding 30 parts of glass fiber through a side feeding port, extruding, water cooling, granulating and drying to obtain the regenerated polyolefin plastic composition. Wherein the temperature of the twin-screw extruder is set as follows: 145 ℃ in the first area, 155 ℃ in the second area, 190 ℃ in the third area, 205 ℃ in the fourth area, 190 ℃ in the fifth area, 195 ℃ in the sixth area and 800 revolutions per minute.
Example 4
Pouring 100 parts of regenerated polypropylene, 100 parts of regenerated polyethylene, 4 parts of 2-ethylhexyl diphenyl phosphate, 10100.3 parts of antioxidant and 1680.3 parts of antioxidant into a high-speed mixer according to the parts by weight, mixing, controlling the temperature at 20 ℃, rotating speed at 1000r/min, and mixing for 3 min; opening the mixer, adding 2 parts of ethylene bis stearamide, mixing again at the rotating speed of 300r/min for 1min to obtain a mixed material;
and feeding the mixed material into a double-screw extruder through a main feeding port, adding 15 parts of glass fiber through a side feeding port, extruding, water cooling, granulating and drying to obtain the regenerated polyolefin plastic composition. Wherein the temperature of the twin-screw extruder is set as follows: 140 ℃ in the first zone, 150 ℃ in the second zone, 185 ℃ in the third zone, 210 ℃ in the fourth zone, 195 ℃ in the fifth zone, 200 ℃ in the sixth zone and 600 rpm.
Example 5
Pouring 100 parts of regenerated polypropylene, 80 parts of regenerated polyethylene, 2 parts of 2-ethylhexyl diphenyl phosphate, 10100.5 parts of antioxidant and 1680.4 parts of antioxidant into a high-speed mixer according to the parts by weight, mixing, controlling the temperature at 20 ℃, rotating speed at 1000r/min, and mixing for 3 min; opening the mixer, adding 1 part of ethylene bis stearamide, mixing again at the rotating speed of 300r/min for 1min to obtain a mixed material;
and feeding the mixed material into a double-screw extruder through a main feeding port, adding 20 parts of glass fiber through a side feeding port, extruding, water cooling, granulating and drying to obtain the regenerated polyolefin plastic composition. Wherein the temperature of the twin-screw extruder is set as follows: 140 ℃ in the first zone, 150 ℃ in the second zone, 185 ℃ in the third zone, 200 ℃ in the fourth zone, 190 ℃ in the fifth zone, 190 ℃ in the sixth zone and 1000 rpm in the rotation speed.
Comparative example 1
Pouring 100 parts of regenerated polypropylene, 80 parts of regenerated polyethylene, 10100.5 parts of antioxidant and 1680.4 parts of antioxidant into a high-speed mixer according to the parts by weight for premixing, controlling the temperature at 20 ℃, the rotating speed at 1000r/min and the mixing time at 3 min; opening the mixer, adding 1 part of ethylene bis stearamide, mixing again at the rotating speed of 300r/min for 1min to obtain a mixed material;
and feeding the mixed material into a double-screw extruder through a main feeding port, adding 20 parts of glass fiber through a side feeding port, extruding, water cooling, granulating and drying to obtain the regenerated polyolefin plastic composition. Wherein the temperature of the twin-screw extruder is set as follows: 140 ℃ in the first zone, 150 ℃ in the second zone, 185 ℃ in the third zone, 200 ℃ in the fourth zone, 190 ℃ in the fifth zone, 190 ℃ in the sixth zone and 1000 rpm in the rotation speed.
Comparative example 2
100 parts of polypropylene new material (Korea SK B350F), 80 parts of polyethylene new material (Shanghai Seikeke 5502AA), 10100.5 parts of antioxidant and 1680.4 parts of antioxidant are poured into a high-speed mixer according to the parts by weight to be mixed, the temperature is controlled at 20 ℃, the rotating speed is 1000r/min, and the mixing time is 3 min; opening the mixer, adding 1 part of ethylene bis stearamide, mixing again at the rotating speed of 300r/min for 1min to obtain a mixed material;
and feeding the main feeding port of the mixed material into a double-screw extruder, adding 20 parts of glass fiber through a side feeding port, extruding, water cooling, granulating and drying to obtain the polyolefin plastic composition. Wherein the temperature of the twin-screw extruder is set as follows: 140 ℃ in the first zone, 150 ℃ in the second zone, 185 ℃ in the third zone, 200 ℃ in the fourth zone, 190 ℃ in the fifth zone, 190 ℃ in the sixth zone and 1000 rpm in the rotation speed.
TABLE 1 test results of examples and comparative examples
In Table 1, tensile strength was tested according to GB/T1040.2-2006, flexural strength was tested according to GB/T9341-.
As can be seen from the test results in Table 1, the addition of 2-ethylhexyl diphenyl phosphate greatly improves the toughness of the polyolefin composition, especially the impact strength of the composition; meanwhile, the tensile strength and the bending strength of the polyolefin composition can be improved. And, according to example 5 and comparative example 2, it can be seen that, after adding 2-ethylhexyl diphenyl phosphate in the present invention, tensile strength and bending strength are comparable to those of polypropylene material completely using new material, while the impact strength of the recycled polyolefin plastic composition of example 5 is more excellent than that of comparative example 2 using new material.
The material prepared by the invention is very suitable for the fields of automobile bumpers, automobile door plates, instrument panels and the like.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. The application of 2-ethylhexyl diphenyl phosphate in the regenerated polyolefin plastic composition is characterized in that the regenerated polyolefin plastic composition is prepared from the following components in parts by weight:
100 parts of regenerated polypropylene (PP), namely,
10-100 parts of regenerated polyethylene,
10-30 parts of glass fiber,
1-5 parts of 2-ethylhexyl diphenyl phosphate,
10100.1-0.5 part of antioxidant,
1680.1-0.5 part of antioxidant,
0.5-2 parts of a lubricant.
2. The use according to claim 1, wherein the reclaimed polypropylene has a combustion residue of less than 2% and a melt index of 30 to 60g/10min at 230 ℃ under 2.16 kg.
3. The use according to claim 1, wherein the regenerated polyethylene has a combustion residue of less than 2% and a melt index of 20 to 30g/10min at 2.16kg, 230 ℃.
4. The use according to claim 1, wherein the glass fibers are alkali-free glass fibers having a filament diameter of 5 to 10 μm.
5. Use according to claim 1, wherein the lubricant is white oil or ethylene bis stearamide.
6. The use according to any one of claims 1 to 5, wherein the process for the preparation of the recycled polyolefin plastic composition comprises the steps of:
(1) uniformly premixing the regenerated polypropylene, the regenerated polyethylene, the 2-ethylhexyl diphenyl phosphate, the antioxidant 1010 and the antioxidant 168 according to the proportion, adding the lubricant according to the proportion, and uniformly mixing again to obtain a mixed material;
(2) and adding the mixed material into a double-screw extruder, adding glass fiber through a side feeding port according to a ratio, and performing extrusion, water cooling, grain cutting and drying to obtain the regenerated polyolefin plastic composition.
7. The application of claim 6, wherein in the step (1), the temperature of the pre-mixing is controlled to be 20 ℃ to 40 ℃, the rotating speed is 1000r/min to 2000r/min, and the mixing time is 3min to 5 min;
the mixing speed is 300-500 r/min, and the mixing time is 1-2 min.
8. The use of claim 6, wherein in step (2), the temperatures in each zone of the twin-screw extruder are: 140-150 ℃ in the first area, 150-160 ℃ in the second area, 185-195 ℃ in the third area, 200-210 ℃ in the fourth area, 190-195 ℃ in the fifth area, 190-200 ℃ in the sixth area, and 500-1000 rpm in the rotating speed.
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