CN114181465A - Low-dielectric polypropylene composition and preparation method thereof - Google Patents
Low-dielectric polypropylene composition and preparation method thereof Download PDFInfo
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- CN114181465A CN114181465A CN202111660075.9A CN202111660075A CN114181465A CN 114181465 A CN114181465 A CN 114181465A CN 202111660075 A CN202111660075 A CN 202111660075A CN 114181465 A CN114181465 A CN 114181465A
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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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/28—Glass
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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
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
Abstract
The invention discloses a low dielectric polypropylene composition and a preparation method thereof, wherein the low dielectric polypropylene composition is prepared from the following components in parts by weight: 1000 parts of polypropylene, 500-1500 parts of soda lime borosilicate hollow glass microspheres, 2-10 parts of diisopropyl bis (ethyl acetoacetate) titanate, 3-10 parts of isopropyl triisostearate titanate and 3-15 parts of antioxidant. Further comprises a lubricant, and the weight part of the lubricant is 5-30 parts. According to the invention, the soda lime borosilicate hollow glass microspheres are used as the filler, so that the dielectric constant of the polypropylene composition can be reduced; by compounding diisopropyl bis (ethyl acetoacetate) titanate and isopropyl triisostearate titanate, the interfacial bonding capacity between the soda lime borosilicate hollow glass microspheres and polypropylene can be obviously increased, the mechanical property of the polypropylene composition can be improved, and the dielectric constant of the composition can be further reduced.
Description
Technical Field
The invention belongs to the field of polymer composite materials, and particularly relates to a low-dielectric polypropylene composition and a preparation method thereof.
Background
Polypropylene, PP for short, is a colorless, odorless, nontoxic and semitransparent solid substance. Polypropylene (PP) is a thermoplastic synthetic resin with excellent properties, is a colorless translucent thermoplastic lightweight general-purpose plastic, and has chemical resistance, heat resistance, electrical insulation, high-strength mechanical properties, good high-wear-resistance processing properties and the like, so that polypropylene has been widely developed and applied in numerous fields such as machinery, automobiles, electronic and electrical appliances, buildings, textiles, packaging, agriculture, forestry, fishery, food industry and the like since the advent. On one hand, polypropylene is having plasticity, and polypropylene materials are gradually replacing wooden products to be applied to a plurality of industrial fields such as packaging, building materials and the like; on the other hand, polypropylene has gradually replaced the mechanical functions of metals due to its high strength, high toughness and high wear resistance. In addition, the polypropylene has good grafting and compounding functions, and has huge application space in the aspects of concrete, textile, packaging and agriculture, forestry and fishery.
However, the polypropylene has a high dielectric constant, which is 2.25-2.50 (tested at 106 Hz) at normal temperature, and further expansion and application of the polypropylene are limited; in addition, the density of polypropylene needs to be further reduced and the impact properties need to be further improved.
Disclosure of Invention
The invention aims to provide a low-dielectric polypropylene composition and a preparation method thereof, which aim to solve the problems in the prior art.
The purpose of the invention is realized by the following technical scheme:
a low dielectric polypropylene composition is prepared from the following components in parts by weight:
preferably, the low dielectric polypropylene composition also comprises a lubricant, wherein the weight part of the lubricant is 5-30 parts; further preferably, the lubricant is polyethylene wax.
Preferably, the melt index of the polypropylene is 5-15g/10min under the conditions of 230 ℃ and 2.16 kg.
Preferably, the soda lime borosilicate hollow glass microspheres are in a hollow state, the density of the hollow glass microspheres is 0.1-0.3g/cc, and the particle size of the hollow glass microspheres is 20-30 microns.
Preferably, the antioxidant is a mixture of antioxidant 1010 and antioxidant 168
The invention also provides a preparation method of the low dielectric polypropylene composition, which comprises the following steps:
(1) adding 500-1500 parts of soda lime borosilicate hollow glass microspheres into a mixer, uniformly spraying 2-10 parts of diisopropyl bis (ethyl acetoacetate) titanate and 3-10 parts of isopropyl triisostearate on the surface of the hollow glass microspheres, adding other components into the mixer after uniform spraying, and uniformly mixing to obtain a mixture; preferably, the mixing speed of the mixer is 100-300r/min, and the mixing time is 5-10 minutes; the mixing speed cannot be too fast, otherwise the surface of the soda lime borosilicate hollow glass microspheres is easy to crack, dent or break.
(2) And adding the mixture from a feed inlet of a double-screw extruder, and performing extrusion granulation to prepare the low-dielectric polypropylene composition. Preferably, the processing technology of the double-screw extruder is as follows: the temperature of the first zone is 150-.
Compared with the prior art, the invention has the beneficial effects that:
the invention uses the soda lime borosilicate hollow glass microspheres as the filler, and compared with talcum powder and calcium carbonate, the invention has the advantages of light weight and greatly reduced dielectric constant. Compared with the common borosilicate hollow glass microspheres, the invention can further reduce the dielectric constant of the polypropylene composition by using the soda lime borosilicate hollow glass microspheres.
According to the invention, diisopropyl bis (acetoacetate) titanate and isopropyl triisostearate are compounded, and the compound is compared with a coupling agent KH550, isopropyl triisostearoyl titanate, diisopropyl bis (acetoacetate) titanate and isopropyl trioleate acyloxy titanate, so that the interface bonding capacity between the soda lime borosilicate hollow glass microspheres and polypropylene can be obviously increased, the mechanical property of the polypropylene composition can be improved, and the dielectric constant of the composition can be further reduced.
The polypropylene composition prepared by the invention has the characteristics of low dielectric constant, light weight, excellent mechanical property and the like. The method can be used for ultra-large scale integrated circuit devices, and can also be used in the field of low dielectric applications such as antenna covers, antenna oscillators and the like in outdoor communication.
Detailed Description
The present invention will be further described with reference to the following examples. It is to be understood that the embodiments described are only a few 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.
The material grades and suppliers for the following examples and comparative examples are as follows:
polypropylene brand PP3317, south asia, taiwan.
Soda lime borosilicate hollow glass microspheres, brand K20, particle size 25 μ M, density 0.2g/cc, 3M corporation, USA.
Borosilicate hollow glass microspheres, particle size 25 μm, density 0.2g/cc, Hebei Jie Gui mineral products Co.
Talcum powder and calcium carbonate with particle size of 2000 mesh, Changhua Yang plastics Limited company.
The coupling agent is diisopropyl bis (acetoacetate) titanate, triisostearoyl isopropyl titanate, the coupling agent KH550, isopropyl trioleate acyloxy titanate and the lubricant polyethylene wax are purchased from Nanjing Feiteng New Material science and technology Co.
The antioxidant is prepared from antioxidant 1010 and antioxidant 168 according to a mass ratio of 1: 1, all purchased from basf, germany.
The reagents are provided only for illustrating the sources and components of the reagents used in the experiments of the present invention, so as to be fully disclosed, and do not indicate that the present invention cannot be realized by using other reagents of the same type or other reagents supplied by other suppliers.
Example 1
A preparation method of a low dielectric polypropylene composition comprises the following steps:
(1) adding 500 parts of soda lime borosilicate hollow glass microspheres into a mixer, uniformly spraying 2 parts of diisopropyl di (ethyl acetoacetate) titanate and 3 parts of isopropyl triisostearate on the surface of the hollow glass microspheres, adding 1000 parts of polypropylene and 3 parts of antioxidant after uniform spraying, and uniformly mixing at normal temperature to obtain a mixture; wherein: the mixing speed is 300r/min, and the mixing time is 5 minutes
(2) And adding the mixture from a feed inlet of a double-screw extruder, and extruding and granulating to obtain the low-dielectric polypropylene composition. The processing technology of the double-screw extruder comprises the following steps: the temperature of the first zone is 150 ℃, the temperature of the second zone is 170 ℃, the temperature of the third zone is 195 ℃, the temperature of the fourth zone is 200 ℃, the temperature of the fifth zone is 205 ℃, the temperature of the sixth zone is 210 ℃ and the temperature of the machine head is 210 ℃.
Example 2
A preparation method of a low dielectric polypropylene composition comprises the following steps:
(1) 800 parts of soda lime borosilicate hollow glass microspheres are added into a mixer, and 4 parts of diisopropyl bis (ethyl acetoacetate) titanate and 6 parts of isopropyl triisostearate are uniformly sprayed on the surface of the hollow glass microspheres. After spraying uniformly, adding 1000 parts of polypropylene, 5 parts of antioxidant and 5 parts of lubricant, and mixing uniformly at normal temperature to obtain a mixture; wherein: the mixing speed was 200r/min and the mixing time was 6 minutes.
(2) And adding the mixture from a feed inlet of a double-screw extruder, and extruding and granulating to obtain the low-dielectric polypropylene composition. The processing technology of the double-screw extruder comprises the following steps: the temperature of the first zone is 160 ℃, the temperature of the second zone is 180 ℃, the temperature of the third zone is 195 ℃, the temperature of the fourth zone is 200 ℃, the temperature of the fifth zone is 205 ℃, the temperature of the sixth zone is 210 ℃ and the temperature of the machine head is 215 ℃.
Example 3
A preparation method of a low dielectric polypropylene composition comprises the following steps:
(1) 1200 parts of soda lime borosilicate hollow glass microspheres are added into a mixer, and 5 parts of diisopropyl bis (ethyl acetoacetate) titanate and 10 parts of isopropyl triisostearate are uniformly sprayed on the surface of the hollow glass microspheres. After spraying uniformly, adding 1000 parts of polypropylene, 12 parts of antioxidant and 18 parts of lubricant, and uniformly mixing at normal temperature to obtain a mixture; wherein: the mixing speed was 150r/min and the mixing time was 8 minutes.
(2) And adding the mixture from a feed inlet of a double-screw extruder, and extruding and granulating to obtain the low-dielectric polypropylene composition. The processing technology of the double-screw extruder comprises the following steps: the temperature of the first zone is 170 ℃, the temperature of the second zone is 190 ℃, the temperature of the third zone is 195 ℃, the temperature of the fourth zone is 205 ℃, the temperature of the fifth zone is 210 ℃, the temperature of the sixth zone is 215 ℃ and the temperature of the machine head is 215 ℃.
Example 4
A preparation method of a low dielectric polypropylene composition comprises the following steps:
(1) 1500 parts of soda lime borosilicate hollow glass microspheres are added into a mixer, and 10 parts of diisopropyl bis (ethyl acetoacetate) titanate and 10 parts of isopropyl triisostearate are uniformly sprayed on the surface of the hollow glass microspheres. After the spraying is uniform, 1000 parts of polypropylene, 15 parts of antioxidant and 30 parts of lubricant are added and mixed uniformly at normal temperature to obtain a mixture; wherein: the mixing speed was 100r/min and the mixing time was 5 minutes.
(2) And adding the mixture from a feed inlet of a double-screw extruder, and extruding and granulating to obtain the low-dielectric polypropylene composition. The processing technology of the double-screw extruder comprises the following steps: the temperature of the first zone is 170 ℃, the temperature of the second zone is 195 ℃, the temperature of the third zone is 200 ℃, the temperature of the fourth zone is 205 ℃, the temperature of the fifth zone is 210 ℃, the temperature of the sixth zone is 215 ℃ and the temperature of the head is 215 ℃.
Example 5
A preparation method of a low dielectric polypropylene composition comprises the following steps:
(1) 1000 parts of soda lime borosilicate hollow glass microspheres are added into a mixer, and 6 parts of diisopropyl bis (ethyl acetoacetate) titanate and 6 parts of isopropyl triisostearate are uniformly sprayed on the surface of the hollow glass microspheres. After spraying uniformly, adding 1000 parts of polypropylene, 10 parts of antioxidant and 15 parts of lubricant, and mixing uniformly at normal temperature to obtain a mixture; wherein: the mixing speed was 120r/min and the mixing time was 6 minutes. The mixing speed cannot be fast, otherwise the surface of the glass microspheres is easy to crack, dent or break, and the performance of the final composition is affected.
(2) And adding the mixture from a feed inlet of a double-screw extruder, and extruding and granulating to obtain the low-dielectric polypropylene composition. The processing technology of the double-screw extruder comprises the following steps: the temperature of the first zone is 160 ℃, the temperature of the second zone is 180 ℃, the temperature of the third zone is 195 ℃, the temperature of the fourth zone is 200 ℃, the temperature of the fifth zone is 205 ℃, the temperature of the sixth zone is 210 ℃ and the temperature of the machine head is 215 ℃.
Comparative example 1
In comparison with example 5. Wherein, the talc powder is used for replacing the soda lime borosilicate hollow glass microspheres with the same quantity, and other technical parameters are the same.
Comparative example 2
In comparison with example 5. Wherein, the soda lime borosilicate hollow glass microspheres are replaced by equal amount of calcium carbonate, and other technical parameters are the same.
Comparative example 3
In comparison with example 5. Wherein, the common borosilicate hollow glass microspheres are used for replacing the soda lime borosilicate hollow glass microspheres in equal amount, and other technical parameters are the same.
Comparative example 4
In comparison with example 5. Wherein, the common coupling agent KH550 is used for replacing the compound coupling agent used in the example 5 in equal amount, and other technical parameters are the same.
Comparative example 5
In comparison with example 5. Wherein, the coupling agent triisostearoyl isopropyl titanate is used for replacing the compound coupling agent used in the example 5 in equal amount, and other technical parameters are the same.
Comparative example 6
In comparison with example 5. Wherein, the coupling agent bis (ethyl acetoacetate) diisopropyl titanate is used for equivalently replacing the compound coupling agent used in the example 5, and other technical parameters are the same.
Comparative example 7
In comparison with example 5. Wherein, the coupling agent isopropyl trioleate acyloxy titanate is used for equivalently replacing the compound coupling agent used in the embodiment 5, and other technical parameters are the same.
Comparative example 8
In comparison with example 5.
(1) Adding 1000 parts of soda lime borosilicate hollow glass microspheres, 12 parts of diisopropyl bis (ethyl acetoacetate) titanate, 1000 parts of polypropylene, 10 parts of antioxidant and 15 parts of lubricant into a mixer, and uniformly mixing at normal temperature. The mixing speed was 500 revolutions and the mixing time was 6 minutes.
(2) And adding the mixture from a feed inlet of a double-screw extruder, and extruding and granulating to obtain the low-dielectric polypropylene composition. The processing technology of the double-screw extruder comprises the following steps: the temperature of the first zone is 160 ℃, the temperature of the second zone is 180 ℃, the temperature of the third zone is 195 ℃, the temperature of the fourth zone is 200 ℃, the temperature of the fifth zone is 205 ℃, the temperature of the sixth zone is 210 ℃ and the temperature of the machine head is 215 ℃.
Comparative example 9
In comparison with example 5.
(1) 1000 parts of soda lime borosilicate hollow glass microspheres are added into a mixer, and 12 parts of diisopropyl bis (ethyl acetoacetate) titanate is uniformly sprayed on the surface of the hollow glass microspheres. After spraying evenly, 1000 parts of polypropylene, 10 parts of antioxidant and 15 parts of lubricant are added and mixed evenly at normal temperature. The mixing speed was 120 revolutions and the mixing time was 6 minutes. The mixing speed cannot be fast, otherwise the surface of the glass microspheres is easy to crack, dent or break, and the performance of the final composition is affected.
(2) And adding the mixture from a feed inlet of a double-screw extruder, and extruding and granulating to obtain the low-dielectric polypropylene composition. The processing technology of the double-screw extruder comprises the following steps: the temperature of the first zone is 150 ℃, the temperature of the second zone is 180 ℃, the temperature of the third zone is 200 ℃, the temperature of the fourth zone is 210 ℃, the temperature of the fifth zone is 220 ℃, the temperature of the sixth zone is 230 ℃ and the temperature of the machine head is 230 ℃.
The performance test method comprises the following steps:
the products prepared in the examples and comparative examples were tested for their properties under the following relevant test conditions:
the tensile strength was measured according to the standard ASTM D638, with test bars of the dumbbell type having dimensions (length. times. width. times. thickness) of 170 mm. times.13 mm. times.3.2 mm; the drawing speed was 5 mm/min.
The notched impact strength of the simply supported beam was measured in accordance with the ASTM D6110-2018, and the test specimen size (length. times. width. times. thickness) was 127 mm. times.13 mm. times.3.2 mm, V-notch, notch depth was 1/5.
The size of a sample strip for dielectric constant test is 8mm multiplied by 3.2mm multiplied by 1.6mm, the surface of the sample strip is uniformly coated with a silver electrode and then the dielectric constant is tested, the test is carried out according to GB/T1409-2006, and the test frequency is 1 MHz.
The results of the performance tests on the products obtained in the examples and comparative examples are shown in Table 1:
TABLE 1 results of performance test of products obtained in examples and comparative examples
As can be seen from the above table, the present invention uses soda lime borosilicate hollow glass microspheres as the filler, and compared with talc powder and calcium carbonate, the present invention has the advantages of light weight and greatly reduced dielectric constant. Compared with the common borosilicate hollow glass microspheres, the invention can further reduce the dielectric constant of the polypropylene composition by using the soda lime borosilicate hollow glass microspheres.
According to the invention, the coupling agent diisopropyl bis (ethyl acetoacetate) titanate and isopropyl triisostearate are compounded, and the coupling agent diisopropyl bis (ethyl acetoacetate) titanate and isopropyl triisostearate are compared with KH550, isopropyl triisostearoyl titanate, diisopropyl bis (ethyl acetoacetate) titanate and isopropyl trioleoxy titanate, so that the interfacial bonding capacity between the soda lime borosilicate hollow glass microspheres and polypropylene can be obviously increased, the mechanical property of the polypropylene composition can be improved, and the dielectric constant of the composition can be further reduced.
The embodiments described above are intended to facilitate one of ordinary skill in the art in understanding and using the present invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the embodiments described herein, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (9)
1. A low dielectric polypropylene composition characterized by: the composition is prepared from the following components in parts by weight:
2. the low dielectric polypropylene composition of claim 1, wherein: the low-dielectric polypropylene composition also comprises a lubricant, wherein the weight part of the lubricant is 5-30 parts.
3. The low dielectric polypropylene composition of claim 1 or 2, wherein: the melt index of the polypropylene is 5-15g/10min under the conditions of 230 ℃ and 2.16 kg.
4. The low dielectric polypropylene composition of claim 1 or 2, wherein: the soda lime borosilicate hollow glass microspheres are hollow, the density of the soda lime borosilicate hollow glass microspheres is 0.1-0.3g/cc, and the particle size of the soda lime borosilicate hollow glass microspheres is 20-30 mu m.
5. The low dielectric polypropylene composition of claim 1 or 2, wherein: the antioxidant is a mixture consisting of an antioxidant 1010 and an antioxidant 168.
6. The low dielectric polypropylene composition of claim 2, wherein: the lubricant is polyethylene wax.
7. The method of preparing the low dielectric polypropylene composition of claim 1 or 2, wherein: the method comprises the following steps:
(1) adding 500-1500 parts of soda lime borosilicate hollow glass microspheres into a mixer, uniformly spraying 2-10 parts of diisopropyl bis (ethyl acetoacetate) titanate and 3-10 parts of isopropyl triisostearate on the surface of the hollow glass microspheres, adding other components into the mixer after uniform spraying, and uniformly mixing to obtain a mixture;
(2) and adding the mixture from a feed inlet of a double-screw extruder, and performing extrusion granulation to prepare the low-dielectric polypropylene composition.
8. The method of claim 7, wherein the low dielectric polypropylene composition comprises: in the step (1), the mixing speed of the mixer is 100-300r/min, and the mixing time is 5-10 minutes.
9. The method of claim 7, wherein the low dielectric polypropylene composition comprises: in the step (2), the processing technology of the double-screw extruder comprises the following steps: the temperature of the first zone is 150-.
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| CN202111660075.9A CN114181465A (en) | 2021-12-30 | 2021-12-30 | Low-dielectric polypropylene composition and preparation method thereof |
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| CN202111660075.9A CN114181465A (en) | 2021-12-30 | 2021-12-30 | Low-dielectric polypropylene composition and preparation method thereof |
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