CN113248897B - Anti-aging socket and preparation method thereof - Google Patents
Anti-aging socket and preparation method thereof Download PDFInfo
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- CN113248897B CN113248897B CN202110627809.7A CN202110627809A CN113248897B CN 113248897 B CN113248897 B CN 113248897B CN 202110627809 A CN202110627809 A CN 202110627809A CN 113248897 B CN113248897 B CN 113248897B
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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
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
The application relates to the field of sockets and particularly discloses an anti-aging socket and a preparation method thereof. The aging-resistant socket comprises a shell and a lead, wherein the shell comprises the following raw materials: polycarbonate, polyester fiber, plasticizer, 3, 4-dihydroxy benzophenone and o-hydroxybenzonitrile; the preparation method comprises the following steps: s1, preparing a shell; s2, preparing the socket. According to the anti-aging socket, 3, 4-dihydroxy benzophenone and o-hydroxy benzonitrile are added into raw materials of the shell, hydrogen on phenolic hydroxyl in a molecular structure of the 3, 4-dihydroxy benzophenone can firstly react with active free radicals in polycarbonate to generate a stable compound, generation of carbon chain free radicals is inhibited, the o-hydroxy benzonitrile can supply hydrogen to the 3, 4-dihydroxy benzophenone, the 3, 4-dihydroxy benzophenone can continuously react with the active free radicals, generation of the carbon chain free radicals is further inhibited, accordingly, aging of the polycarbonate is delayed, aging resistance of the prepared shell is synergistically improved, and service life of the socket is prolonged.
Description
Technical Field
The application relates to the field of sockets, in particular to an anti-aging socket and a preparation method thereof.
Background
The socket is almost ubiquitous in daily work and life, is a manually controlled tool mainly used for switching on and off a circuit, and is used very frequently.
Chinese utility model patent like patent publication No. CN209200218U discloses a socket, including the casing, the casing is equipped with a set of inserting the cabin that is used for plug male at least, and a set of cabin of inserting includes two jacks of mutual isolation at least, and two sides that a pair of conducting strip in the same jack deviates from mutually are equipped with respectively and are used for inter attraction to make the magnet piece that two conducting strips closely paste.
By adopting the socket, the shell of the socket is generally made of plastic, and when the socket is used, the socket needs to be exposed in the air for a long time, so that the aging resistance of the socket is poor, the service life of the socket is easily shortened, and the improvement is needed.
Disclosure of Invention
In order to solve the problem that the aging resistance of the socket is poor, the application provides an aging-resistant socket and a preparation method thereof.
In a first aspect, the present application provides an aging-resistant socket, which adopts the following technical scheme:
an aging-resistant socket comprises a shell and a lead arranged in the shell, wherein the shell comprises the following raw materials in parts by weight:
60-75 parts of polycarbonate;
12-20 parts of polyester fiber;
2-5 parts of a plasticizer;
1-2 parts of 3, 4-dihydroxy benzophenone;
0.5-1 part of o-hydroxybenzonitrile.
By adopting the technical scheme, the polycarbonate is used as the base material of the shell, and the polycarbonate has high strength and better heat resistance, weather resistance and fatigue resistance, so that the prepared shell has better aging resistance.
When the polycarbonate is used in the air for a long time, the polycarbonate can be oxidized and generate active free radicals, the active free radicals are combined with oxygen to form peroxide free radicals, and the peroxide free radicals react with the polycarbonate to form carbon chain free radicals, so that the degradation of the polycarbonate is accelerated, and the polycarbonate is embrittled, cracked and poor in mechanical properties, namely the polycarbonate is aged.
After the 3, 4-dihydroxy benzophenone and the o-hydroxy benzonitrile are added, the number of phenolic hydroxyl groups contained in the molecular structure of the 3, 4-dihydroxy benzophenone is greater than that of the phenolic hydroxyl groups contained in the molecular structure of the o-hydroxy benzonitrile, so that the activity of the 3, 4-dihydroxy benzophenone is greater than that of the o-hydroxy benzonitrile, hydrogen on the phenolic hydroxyl groups in the molecular structure of the 3, 4-dihydroxy benzophenone reacts with active free radicals in the polycarbonate first to generate stable compounds, and further generation of carbon chain free radicals is inhibited.
Then, the o-hydroxybenzonitrile supplies hydrogen to the 3, 4-dihydroxybenzophenone, so that the 3, 4-dihydroxybenzophenone continuously reacts with active free radicals in the polycarbonate, and the generation of carbon chain free radicals is further inhibited, thereby delaying the aging of the polycarbonate and synergistically improving the aging resistance of the prepared shell.
The polyester fiber has good corrosion resistance and heat resistance, the weather resistance of the whole shell is improved after the polyester fiber is added and mixed, the influence of climate and temperature change on the shell is reduced, the toughness of the whole shell can be improved by adding the polyester fiber, the formation of cracks on the inner wall of the shell is reduced, the shell is not easy to crack, and the aging resistance of the shell can be comprehensively improved.
Through the comprehensive action of the 3, 4-dihydroxy benzophenone, the o-hydroxybenzonitrile and the polyester fiber, the aging resistance of the shell is improved, and the service life of the socket is prolonged.
Preferably, the raw materials also comprise 6-8 parts of quartz powder by weight.
By adopting the technical scheme, the main component of the quartz powder is crystalline silica, the particles of the quartz powder have regular geometric shapes and are polyhedral, after the quartz powder is added and mixed, when ultraviolet rays irradiate on the shell, the surfaces of the quartz powder particles can refract and reflect the ultraviolet rays, and the ultraviolet rays acting on the shell are reduced, so that the influence of the ultraviolet rays on the shell is reduced, the ultraviolet resistance effect of the shell is improved, and the aging resistance of the shell is further improved; the hardness of the quartz powder is high, the integral hardness of the shell can be improved after the quartz powder is added, the abrasion resistance of the shell can be further improved, the abrasion of the plug on the socket caused by multiple plug-in connection on the socket is reduced, the aging resistance of the shell can be indirectly improved, and the socket is more durable.
Preferably, the raw material also comprises 5 to 7 parts of n-heptyl isocyanate in parts by weight.
By adopting the technical scheme, the molecular structure of the n-heptyl isocyanate contains the isocyanate group, the isocyanate group can react with the hydroxyl on the surface of the quartz powder to graft the carbon chain in the molecular structure of the n-heptyl isocyanate on the surface of the quartz powder, and then the surface of the quartz powder is modified, so that the surface of the quartz powder is changed from hydrophilicity to hydrophobicity, the dispersibility of the quartz powder in the polycarbonate is improved, the quartz powder is not easy to agglomerate in the polycarbonate, when the ultraviolet rays irradiate on the shell, the shell can reflect and refract more ultraviolet rays, the ultraviolet resistance effect of the shell is further improved, the aging resistance of the shell is improved, the integral hardness of the shell is more uniform, and the wear resistance of the shell is improved.
Preferably, the preparation method of the polyester fiber comprises the following steps of: stirring 4-6 parts of phthalic acid, 4-6 parts of ethylene glycol and 0.1-0.2 part of manganese acetate at the temperature of 190-.
By adopting the technical scheme, the polyester fibers and the quartz powder are distributed in the polycarbonate in a staggered manner, when ultraviolet rays irradiate on the shell, partial ultraviolet rays can be staggered with the quartz powder and further continuously irradiate on the shell, the ultraviolet rays irradiated on the shell can be contacted with the polyester fibers and further absorbed by the 5-hydroxyflavone in the polyester fibers, the ketone group and the hydroxyl group in the molecular structure of the 5-hydroxyflavone can generate an internal hydrogen bond to form a chelate ring, the internal hydrogen bond is destroyed after the 5-hydroxyflavone absorbs the ultraviolet rays, the chelate ring is opened, the energy of the ultraviolet rays is changed into heat energy to be released, the condition that the ultraviolet rays act on the shell is further reduced, the ultraviolet resistance effect of the shell is improved, the aging resistance of the shell is better, and the service life of the socket is longer.
Preferably, the raw materials also comprise 10 to 15 parts of polyethylene terephthalate by weight.
Through adopting above-mentioned technical scheme, polyethylene terephthalate and polycarbonate belong to linear aromatic polyester with the same, and chemical structure is similar, therefore the compatibility is good, and after both blend, can improve the antifriction and the corrosion resistance of casing, and then be favorable to promoting the ageing resistance of casing for the socket is more durable.
Preferably, the plasticizer is one of dibutyl phthalate and diisononyl phthalate.
In a second aspect, the present application provides a method for manufacturing an aging-resistant socket, which adopts the following technical scheme:
a preparation method of an aging-resistant socket comprises the following steps:
s1, preparing a shell: stirring polycarbonate and a plasticizer at the temperature of 220-230 ℃ for reaction for 50-60min, then adding polyester fiber, 3, 4-dihydroxy benzophenone and o-hydroxybenzonitrile, stirring for 1-3min to prepare a mixture, then pouring the mixture into a mold, cooling to room temperature, trimming and shaping to prepare a shell;
s2, preparing a socket: the lead wires were mounted in the housing obtained in S1, and a completed socket was produced.
Preferably, in the S1, 6-8 parts of quartz powder is introduced with N at the temperature of 240-250 DEG C2Keeping the temperature for 6 to 7 hours for activation, cooling to room temperature, then adding 5 to 7 parts of N-heptyl isocyanate and 60 to 80ml of anhydrous toluene, and introducing N2Uniformly stirring, heating to 60-70 ℃, and stirring for reaction for 1-1.5h to obtain modified quartz powder;
stirring 60-75 parts of polycarbonate, 10-15 parts of polyethylene terephthalate and 2-5 parts of plasticizer at 260 ℃ for reaction for 50-60min, then cooling to 230 ℃ of 220 ℃ of organic silicon, adding modified quartz powder, 12-20 parts of polyester fiber, 1-2 parts of 3, 4-dihydroxy benzophenone and 0.5-1 part of o-hydroxy benzonitrile, stirring for 1-3min to obtain a mixture, then pouring the mixture into a mold, cooling to room temperature, trimming and shaping to obtain the shell.
By adopting the technical scheme, the quartz powder is activated, so that the hydroxyl content on the surface of the quartz powder can be increased, the n-heptyl isocyanate can be grafted on the quartz powder, and the modification rate of the quartz powder can be increased.
In summary, the present application has the following beneficial effects:
1. according to the application, 3, 4-dihydroxy benzophenone and o-hydroxy benzonitrile are adopted, hydrogen on phenolic hydroxyl in a molecular structure of the 3, 4-dihydroxy benzophenone can firstly react with active free radicals in polycarbonate to generate a stable compound, so that generation of carbon chain free radicals is inhibited, the o-hydroxy benzonitrile can supply hydrogen to the 3, 4-dihydroxy benzophenone, the 3, 4-dihydroxy benzophenone can continuously react with the active free radicals in the polycarbonate, generation of the carbon chain free radicals is further inhibited, aging of the polycarbonate is delayed, aging resistance of the prepared shell is synergistically improved, and service life of the socket is prolonged.
2. Preferably adopt quartz powder in this application, quartz powder's principal ingredients is crystalline silica, its granule has neat regular geometric shape, when the ultraviolet ray shines on the casing, quartz powder particle's surface can refract and reflect the ultraviolet ray, the ultraviolet resistance effect of casing has been improved, and then the ageing resistance of casing has been improved, and quartz powder's hardness is great, can improve the wearability of casing, the wearing and tearing that cause the socket when having reduced the plug and pegging graft on the socket, can indirectly improve the ageing resistance of casing, make the socket more durable.
3. In the application, 5-hydroxyflavone is preferably adopted, when ultraviolet rays irradiate on the shell, part of the ultraviolet rays staggered with the quartz powder can contact with the polyester fibers and then are absorbed by the 5-hydroxyflavone, and then the energy of the ultraviolet rays is converted into heat energy by the 5-hydroxyflavone to be released, so that the condition that the ultraviolet rays act on the shell is further reduced, the ultraviolet resistance effect of the shell is improved, the ageing resistance of the shell is better, and the service life of the socket is longer.
Detailed Description
The present application will be described in further detail with reference to examples.
The polycarbonate is purchased from Shanghai plastic easy plasticizing company, and the brand is 1239; 3, 4-dihydroxybenzophenone purchased from Colosseus, Inc.; o-hydroxybenzonitrile from Wenzhou megalosh chemical Co., Ltd; the quartz powder is purchased from Fengyang Shuitai quartz sand Co., Ltd, and the product number is No. 7 refined quartz sand; n-heptyl isocyanate is available from Beijing carbofuran technologies, Inc.; 5-Hydroxyflavone was purchased from Beijing Bailingwei science and technology Ltd; polyethylene terephthalate is purchased from Yukunlong plastification Co., Ltd, Yuyao, and the trade mark is WK 801; the model of the ultraviolet accelerated aging test box is IK-ZW-1300.
The raw materials used in the following embodiments may be those conventionally commercially available unless otherwise specified.
Preparation example of polyester fiber
Preparation example 1
Preparation of polyester fiber: stirring 40g of phthalic acid, 40g of ethylene glycol and 1g of manganese acetate at 190 ℃ for reaction for 5 hours, then adding 20g of 5-hydroxyflavone, stirring and mixing uniformly, then carrying out melt spinning at 280 ℃ and a spinning speed of 1000m/min, then carrying out drawing processing, cutting into a length of 3mm, and obtaining the polyester fiber, wherein the temperature of a hot plate is 75 ℃, the temperature of a hot plate is 140 ℃, and the drawing multiple is 3.5 times.
Examples
Example 1
The application discloses ageing-resistant socket, including the casing with install the wire in the casing, the casing includes following raw materials: polycarbonate, polyester fiber, a plasticizer, 3, 4-dihydroxy benzophenone and o-hydroxybenzonitrile, wherein the plasticizer adopts dibutyl phthalate, the polyester fiber is purchased from Tally chemical fiber products Co., Ltd, Huimin county, the specification is 3mm, and the content of each component is shown in the following table 1-1.
The preparation method of the aging-resistant socket comprises the following steps:
s1, preparing a shell: stirring polycarbonate and a plasticizer at 220 ℃ for reaction for 60min, then adding polyester fiber, 3, 4-dihydroxy benzophenone and o-hydroxybenzonitrile, stirring for 1min to obtain a mixture, then pouring the mixture into a mold, cooling to room temperature, trimming and shaping to obtain a shell;
s2, preparing a socket: the lead wires were mounted in the housing obtained in S1, and a completed socket was produced.
Example 2
The application discloses ageing-resistant socket, including the casing with install the wire in the casing, the casing includes following raw materials: polycarbonate, polyester fiber, a plasticizer, 3, 4-dihydroxy benzophenone and o-hydroxybenzonitrile, wherein the plasticizer adopts dibutyl phthalate, the polyester fiber is purchased from Tally chemical fiber products Co., Ltd, Huimin county, the specification is 3mm, and the content of each component is shown in the following table 1-1.
The preparation method of the aging-resistant socket comprises the following steps:
s1, preparing a shell: stirring polycarbonate and a plasticizer at 230 ℃ for 50min for reaction, then adding polyester fiber, 3, 4-dihydroxy benzophenone and o-hydroxybenzonitrile, stirring for 3min to obtain a mixture, then pouring the mixture into a mold, cooling to room temperature, trimming and shaping to obtain a shell;
s2, preparing a socket: the lead wires were mounted in the housing obtained in S1, and a completed socket was produced.
Example 3
The application discloses ageing-resistant socket, including the casing with install the wire in the casing, the casing includes following raw materials: polycarbonate, polyester fiber, a plasticizer, 3, 4-dihydroxy benzophenone and o-hydroxybenzonitrile, wherein the plasticizer adopts dibutyl phthalate, the polyester fiber is purchased from Tally chemical fiber products Co., Ltd, Huimin county, the specification is 3mm, and the content of each component is shown in the following table 1-1.
The preparation method of the aging-resistant socket comprises the following steps:
s1, preparing a shell: stirring polycarbonate and a plasticizer at 225 ℃ for reaction for 55min, then adding polyester fiber, 3, 4-dihydroxy benzophenone and o-hydroxybenzonitrile, stirring for 2min to obtain a mixture, then pouring the mixture into a mold, cooling to room temperature, trimming and shaping to obtain a shell;
s2, preparing a socket: the lead wires were mounted in the housing obtained in S1, and a completed socket was produced.
Example 4
The difference from example 1 is that quartz powder was added to the raw material of the case, and the contents of the respective components are shown in the following table 1-1.
S1, preparing a shell: stirring polycarbonate and a plasticizer at 220 ℃ for reaction for 60min, then adding quartz powder, polyester fiber, 3, 4-dihydroxy benzophenone and o-hydroxybenzonitrile, stirring for 1min to obtain a mixture, then pouring the mixture into a mold, cooling to room temperature, trimming and shaping to obtain the shell.
Example 5
The difference from example 4 is that n-heptyl isocyanate was added to the raw material for the shell, and the contents of the respective components are shown in the following Table 1-1.
S1, preparing a shell: introducing N into quartz powder at 240 deg.C2Keeping the temperature for 7 hours for activation, cooling to room temperature, then adding N-heptyl isocyanate and 60ml of anhydrous toluene, and introducing N2Uniformly stirring, heating to 60 ℃, and stirring for reaction for 1.5 hours to obtain modified quartz powder;
stirring polycarbonate and a plasticizer at 220 ℃ for reaction for 60min, adding modified quartz powder, polyester fiber, 3, 4-dihydroxy benzophenone and p-hydroxybenzonitrile, stirring for 1min to obtain a mixture, pouring the mixture into a mold, cooling to room temperature, trimming and shaping to obtain the shell.
Example 6
The difference from example 4 is that the polyester fiber was prepared by preparation example 1, and the contents of the respective components are shown in the following table 1-1.
Example 7
The difference from example 1 is that polyethylene terephthalate was added to the raw material of the case and the contents of the respective components are shown in the following table 1-1.
S1, preparing a shell: stirring polycarbonate, polyethylene terephthalate and a plasticizer at 250 ℃ for reaction for 60min, then cooling to 220 ℃, adding polyester fiber, 3, 4-dihydroxy benzophenone and p-hydroxybenzonitrile, stirring for 1min to prepare a mixture, then pouring the mixture into a mold, cooling to room temperature, trimming and shaping to prepare the shell.
Example 8
The application discloses ageing-resistant socket, including the casing with install the wire in the casing, the casing includes following raw materials: polycarbonate, polyester fiber, a plasticizer, 3, 4-dihydroxy benzophenone, o-hydroxybenzonitrile, quartz powder, n-heptyl isocyanate and polyethylene glycol terephthalate, wherein the plasticizer is diisononyl phthalate, the polyester fiber is prepared by preparation example 1, and the content of each component is shown in the following table 1-1.
The preparation method of the aging-resistant socket comprises the following steps:
s1, preparing a shell: introducing N into quartz powder in sand bath at 240 deg.C2Keeping the temperature for 7 hours for activation, cooling to room temperature, then adding N-heptyl isocyanate and 60ml of anhydrous toluene, and introducing N2Stirring and mixing uniformly, then heating to 60 ℃ for oil bath, and stirring and reacting for 1.5h to obtain modified quartz powder;
stirring polycarbonate, polyethylene terephthalate and a plasticizer at 250 ℃ for reaction for 60min, then cooling to 220 ℃, adding modified quartz powder, polyester fiber, 3, 4-dihydroxy benzophenone and o-hydroxy benzonitrile, stirring for 1min to prepare a mixture, then pouring the mixture into a mold, cooling to room temperature, trimming and shaping to prepare a shell;
s2, preparing a socket: the lead wires were mounted in the housing obtained in S1, and a completed socket was produced.
Example 9
The application discloses ageing-resistant socket, including the casing with install the wire in the casing, the casing includes following raw materials: polycarbonate, polyester fiber, a plasticizer, 3, 4-dihydroxy benzophenone, o-hydroxybenzonitrile, quartz powder, n-heptyl isocyanate and polyethylene glycol terephthalate, wherein the plasticizer is diisononyl phthalate, the polyester fiber is prepared by preparation example 1, and the content of each component is shown in the following table 1-1.
The preparation method of the aging-resistant socket comprises the following steps:
s1, preparing a shell: introducing N into quartz powder at 250 deg.C in sand bath2Keeping the temperature for 6 hours for activation, cooling to room temperature, adding N-heptyl isocyanate and 80ml of anhydrous toluene, and introducing N2Stirring and mixing uniformly, then heating to 70 ℃ for oil bath, and stirring and reacting for 1h to obtain modified quartz powder;
stirring polycarbonate, polyethylene terephthalate and a plasticizer at 260 ℃ for reaction for 50min, then cooling to 230 ℃, adding modified quartz powder, polyester fiber, 3, 4-dihydroxy benzophenone and o-hydroxy benzonitrile, stirring for 3min to prepare a mixture, then pouring the mixture into a mold, cooling to room temperature, trimming and shaping to prepare a shell;
s2, preparing a socket: the lead wires were mounted in the housing obtained in S1, and a completed socket was produced.
Example 10
The application discloses ageing-resistant socket, including the casing with install the wire in the casing, the casing includes following raw materials: polycarbonate, polyester fiber, a plasticizer, 3, 4-dihydroxy benzophenone, o-hydroxybenzonitrile, quartz powder, n-heptyl isocyanate and polyethylene glycol terephthalate, wherein the plasticizer is diisononyl phthalate, the polyester fiber is prepared by preparation example 1, and the content of each component is shown in the following table 1-2.
The preparation method of the aging-resistant socket comprises the following steps:
s1, preparing a shell: introducing N into quartz powder in sand bath at 245 deg.C2Keeping the temperature for 6 hours for activation, cooling to room temperature, adding N-heptyl isocyanate and 70ml of anhydrous toluene, and introducing N2Stirring and mixing uniformly, then heating to 65 ℃ for oil bath, and stirring and reacting for 1.5h to obtain modified quartz powder;
stirring polycarbonate, polyethylene terephthalate and a plasticizer at 255 ℃ for 55min for reaction, then cooling to 225 ℃, adding modified quartz powder, polyester fiber, 3, 4-dihydroxy benzophenone and o-hydroxy benzonitrile, stirring for 2min to prepare a mixture, then pouring the mixture into a mold, cooling to room temperature, trimming and shaping to prepare a shell;
s2, preparing a socket: the lead wires were mounted in the housing obtained in S1, and a completed socket was produced.
Example 11
The difference from example 4 is that the quartz powder was replaced with starch, and the contents of the respective components are shown in tables 1 to 2 below.
Example 12
The difference from example 5 was that n-heptyl isocyanate was replaced with isooctyl stearate, and the contents of the respective components are shown in tables 1 to 2 below.
Example 13
The difference from example 6 is that 5-hydroxyflavone in preparation example 1 was replaced with ethanol, and the contents of the respective components are shown in tables 1 to 2 below.
Example 14
The difference from example 7 is that polyethylene terephthalate was replaced with isooctyl stearate, and the contents of the respective components are shown in tables 1 to 2 below.
Comparative example
Comparative example 1
The difference from example 1 is that the housing made of polycarbonate and plasticizer is used as a blank control.
Comparative example 2
The difference from example 1 is that 3, 4-dihydroxybenzophenone was replaced with aniline, and the contents of the respective components are shown in tables 1-2 below.
Comparative example 3
The difference from example 1 is that o-hydroxybenzonitrile was replaced by ethanol and the contents of the components are shown in tables 1-2 below.
Comparative example 4
The difference from comparative example 2 is that o-hydroxybenzonitrile was replaced with ethanol, and the contents of the components are shown in tables 1 to 2 below.
Comparative example 5
The difference from example 1 is that polyester fiber was replaced with isooctyl stearate, and the contents of the respective components are shown in tables 1 to 2 below.
TABLE 1-1 ingredient content table (unit: g)
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Example 7 | Example 8 | Example 9 | |
| Polycarbonate resin | 600 | 750 | 680 | 600 | 600 | 600 | 600 | 600 | 750 |
| Polyester fiber/isooctyl stearate | 120 | 200 | 160 | 120 | 120 | 120 | 120 | 120 | 200 |
| Plasticizer | 20 | 50 | 35 | 20 | 20 | 20 | 20 | 20 | 50 |
| 3, 4-dihydroxy benzophenone/aniline | 10 | 20 | 15 | 10 | 10 | 10 | 10 | 10 | 20 |
| O-hydroxybenzonitrile/ethanol | 5 | 10 | 8 | 5 | 5 | 5 | 5 | 5 | 10 |
| Quartz powder/starch | / | / | / | 60 | 60 | 60 | / | 60 | 80 |
| N-heptyl isocyanate/isooctyl stearate | / | / | / | / | 50 | / | / | 50 | 70 |
| Polyethylene terephthalate/isooctyl stearate | / | / | / | / | / | / | 100 | 100 | 150 |
TABLE 1-2 ingredient content table (unit: g)
| Example 10 | Example 11 | Example 12 | Example 13 | Example 14 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 | |
| Polycarbonate resin | 680 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 600 |
| Polyester fiber/isooctyl stearate | 160 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 |
| Plasticizer | 35 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| 3, 4-dihydroxy benzophenone/aniline | 15 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
| O-hydroxybenzonitrile/ethanol | 8 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Quartz powder/starch | 70 | 60 | 60 | 60 | / | / | / | / | / |
| N-heptyl isocyanate/isooctyl stearate | 60 | / | 50 | / | / | / | / | / | / |
| Polyethylene terephthalate/isooctyl stearate | 125 | / | / | / | 100 | / | / | / | / |
Performance test
A case having a size of 100 mm. times.100 mm. times.3 mm was prepared according to the preparation methods of examples 1 to 14 and comparative examples 1 to 5, and the case was used as a sample.
(1) Aging resistance test (aging resistance characterized by tensile strength retention): the samples of examples 1-14 and comparative examples 1-5 were tested according to method B of GB/T7141-2008 "method for testing thermal aging of plastics", at a test temperature of 90 ℃ and a test time of 500h, and the tensile strength before and after the artificial accelerated aging of each sample was measured and the retention rate of the tensile strength was calculated, and the results are shown in Table 2 below.
(2) And (3) ultraviolet resistance test: the samples of examples 1, 4-6, 11-13 were placed in an ultraviolet accelerated aging test chamber at an ultraviolet wavelength of 350nm and a temperature of 60 deg.C under light for 400 hours, and the gloss on the surface of the sample was observed and recorded at 10 minutes, with the gloss at 10 minutes being the best, and the test results are shown in Table 2 below.
(3) And (3) wear resistance test: the specimens of examples 1, 4-5, 7, 11-12, 14 were tested according to the standard GB/T3960-.
TABLE 2 test results of examples and comparative examples
| Retention ratio of tensile strength/%) | UV resistance test | Rate of wear/%) | |
| Example 1 | 80.7 | 3 | 0.85 |
| Example 2 | 81.3 | / | / |
| Example 3 | 80.9 | / | / |
| Example 4 | 81.9 | 5 | 0.59 |
| Example 5 | 82.4 | 6 | 0.47 |
| Example 6 | 82.7 | 8 | / |
| Example 7 | 81.5 | / | 0.65 |
| Example 8 | 83.2 | / | / |
| Example 9 | 84.0 | / | / |
| Example 10 | 83.5 | / | / |
| Example 11 | 80.9 | 3 | 0.82 |
| Example 12 | 82.1 | 5 | 0.55 |
| Example 13 | 82.5 | 5 | / |
| Example 14 | 81.1 | / | 0.79 |
| Comparative example 1 | 76.3 | / | / |
| Comparative example 2 | 78.8 | / | / |
| Comparative example 3 | 79.6 | / | / |
| Comparative example 4 | 78.1 | / | / |
| Comparative example 5 | 78.4 | / | / |
In summary, the following conclusions can be drawn:
1. combining example 1 and comparative examples 1-4 with table 2, it can be seen that the co-addition of 3, 4-dihydroxybenzophenone and o-hydroxybenzonitrile synergistically increases the aging resistance of the shell, probably because: the number of phenolic hydroxyl groups contained in the molecular structure of the 3, 4-dihydroxybenzophenone is larger than that of the phenolic hydroxyl groups contained in the molecular structure of the o-hydroxybenzonitrile, so that the activity of the 3, 4-dihydroxybenzophenone is larger than that of the o-hydroxybenzonitrile, and hydrogen on the phenolic hydroxyl groups in the molecular structure of the 3, 4-dihydroxybenzophenone reacts with active free radicals in the polycarbonate first to generate stable compounds, thereby inhibiting the generation of carbon chain free radicals.
Then, the o-hydroxybenzonitrile supplies hydrogen to the 3, 4-dihydroxybenzophenone, so that the 3, 4-dihydroxybenzophenone continuously reacts with active free radicals in the polycarbonate, and the generation of carbon chain free radicals is further inhibited, thereby delaying the aging of the polycarbonate and synergistically improving the aging resistance of the prepared shell.
2. As can be seen from the combination of examples 4 and 11 and table 2, the addition of the quartz powder improves the aging resistance and wear resistance of the housing, which may be due to: the main component of the quartz powder is crystalline silicon dioxide, the particles of the crystalline silicon dioxide have regular and regular geometric shapes and are polyhedral, after the quartz powder is added and mixed, when ultraviolet rays irradiate on the shell, the surfaces of the quartz powder particles can refract and reflect the ultraviolet rays, the ultraviolet resistance effect of the shell is improved, and further the aging resistance of the shell is improved; the hardness of the quartz powder is high, the integral hardness of the shell can be improved after the quartz powder is added, the abrasion resistance of the shell can be further improved, the abrasion of the plug on the socket caused by multiple plug-in connection on the socket is reduced, the aging resistance of the shell is indirectly improved, and the socket is more durable.
3. As can be seen by combining examples 4-5, 11-12 with Table 2, the addition of quartz powder together with n-heptyl isocyanate improved the aging resistance and wear resistance of the casing, probably because: the molecular structure of the n-heptyl isocyanate contains isocyanate groups, the isocyanate groups can react with hydroxyl groups on the surface of quartz powder to graft carbon chains in the molecular structure of the n-heptyl isocyanate on the surface of the quartz powder, and then the surface of the quartz powder is modified, so that the surface of the quartz powder is changed from hydrophilicity to hydrophobicity, the dispersibility of the quartz powder in polycarbonate is improved, the quartz powder is not easy to agglomerate in the polycarbonate, when ultraviolet rays irradiate on the shell, the shell can reflect and refract more ultraviolet rays, the ultraviolet resistance effect of the shell is further improved, the aging resistance of the shell is improved, the integral hardness of the shell is more uniform, and the wear resistance of the shell is improved.
4. In combination with examples 4, 6, 11, and 13 and in combination with table 2, it can be seen that the addition of 5-hydroxyflavone to the raw material of polyester fiber is beneficial to improve the aging resistance of the shell, which may be due to: the polyester fibers and the quartz powder are distributed in the polycarbonate in a staggered mode, when ultraviolet rays irradiate on the shell, partial ultraviolet rays can be staggered with the quartz powder and further continuously irradiate on the shell, the ultraviolet rays irradiating on the shell can be contacted with the polyester fibers and further absorbed by 5-hydroxyflavone in the polyester fibers, and after the 5-hydroxyflavone absorbs the ultraviolet rays, the energy of the ultraviolet rays is converted into heat energy to be released, so that the ultraviolet resistance effect of the shell is further improved, the ageing resistance of the shell is better, and the service life of the socket is longer.
5. As can be seen from the combination of examples 1, 7 and 14 and from table 2, the addition of polyethylene terephthalate is advantageous for improving the aging resistance of the casing, probably because: the polyethylene terephthalate and the polycarbonate belong to linear aromatic polyester, and have similar chemical structures, so that the compatibility is good, and after the polyethylene terephthalate and the polycarbonate are blended, the friction resistance and the corrosion resistance of the shell can be improved, thereby being beneficial to improving the aging resistance of the shell and enabling the socket to be more durable.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (7)
1. The aging-resistant socket comprises a shell and a lead arranged in the shell, and is characterized in that the shell comprises the following raw materials in parts by weight:
60-75 parts of polycarbonate;
12-20 parts of polyester fiber;
2-5 parts of a plasticizer;
1-2 parts of 3, 4-dihydroxy benzophenone;
0.5-1 part of o-hydroxybenzonitrile;
6-8 parts of quartz powder.
2. The burn-in resistant socket of claim 1, wherein: the raw material also comprises 5-7 parts of n-heptyl isocyanate according to parts by weight.
3. The burn-in resistant socket of claim 1, wherein: the preparation method of the polyester fiber comprises the following steps of: stirring 4-6 parts of phthalic acid, 4-6 parts of ethylene glycol and 0.1-0.2 part of manganese acetate at the temperature of 190-.
4. The burn-in resistant socket of claim 1, wherein: the raw materials also comprise 10-15 parts of polyethylene glycol terephthalate by weight.
5. The burn-in resistant socket of claim 1, wherein: the plasticizer is one of dibutyl phthalate and diisononyl phthalate.
6. A method of making the burn-in resistant socket of claim 1, comprising the steps of:
s1, preparing a shell: stirring polycarbonate and a plasticizer at the temperature of 220-230 ℃ for reaction for 50-60min, then adding polyester fiber, 3, 4-dihydroxy benzophenone and o-hydroxybenzonitrile, stirring for 1-3min to prepare a mixture, then pouring the mixture into a mold, cooling to room temperature, trimming and shaping to prepare a shell;
s2, preparing a socket: the lead wires were mounted in the housing obtained in S1, and a completed socket was produced.
7. The method of claim 6, wherein the socket is made by: in the S1, 6-8 parts of quartz powder is introduced with N at the temperature of 240 ℃ and 250 DEG C2Keeping the temperature for 6 to 7 hours for activation, cooling to room temperature, then adding 5 to 7 parts of N-heptyl isocyanate and 60 to 80ml of anhydrous toluene, and introducing N2Uniformly stirring, heating to 60-70 ℃, and stirring for reaction for 1-1.5h to obtain modified quartz powder;
stirring 60-75 parts of polycarbonate, 10-15 parts of polyethylene terephthalate and 2-5 parts of plasticizer at 260 ℃ for reaction for 50-60min, then cooling to 230 ℃ of 220 ℃ of organic silicon, adding modified quartz powder, 12-20 parts of polyester fiber, 1-2 parts of 3, 4-dihydroxy benzophenone and 0.5-1 part of o-hydroxy benzonitrile, stirring for 1-3min to obtain a mixture, then pouring the mixture into a mold, cooling to room temperature, trimming and shaping to obtain the shell.
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| JPH086018B2 (en) * | 1987-09-30 | 1996-01-24 | 帝人化成株式会社 | Thermoplastic resin composition |
| US20080081892A1 (en) * | 2006-09-29 | 2008-04-03 | General Electric Company | Thermoplastic compositions, methods of making, and articles formed therefrom |
| US7709562B2 (en) * | 2006-09-29 | 2010-05-04 | Sabic Innovative Plastics Ip B.V. | Thermoplastic compositions, methods of making, and articles formed therefrom |
| US9234096B2 (en) * | 2011-02-03 | 2016-01-12 | Sabic Global Technologies B.V. | Color and heat stable polycarbonate compositions and methods of making |
| US9944768B2 (en) * | 2013-04-01 | 2018-04-17 | Sabic Global Technologies B.V. | High modulus laser direct structuring polycarbonate composites with enhanced plating performance and broad laser window and methods for the manufacture and use thereof |
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