CN111978715A - Glass fiber reinforced nylon and preparation method thereof - Google Patents
Glass fiber reinforced nylon and preparation method thereof Download PDFInfo
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Abstract
The invention discloses glass fiber reinforced nylon which comprises the following raw materials in percentage by mass: 8-15% of PA 6; 8-15% of nylon mixture; 0.5-1.5% of epoxy resin; 70-80% of glass fiber; 0.1-0.3% of nucleating agent; 0.2-0.4% of silane coupling agent; 0.2-0.4% of a lubricant; 0.2-0.4% of a dispersant; 0.2-0.4% of a flow modifier; 1-3% of a toughening agent; 0.1 to 1% of inorganic rigid particles; 0.4-4% of an elastomer; 0.1-0.5% of antioxidant and 0.3-0.6% of toner. The nylon mixture comprises the following raw materials in percentage by mass: 55-65% of PA66, 15-25% of PA12 and 15-25% of PA 9T. The glass fiber reinforced nylon has the advantages of high hardness, good dimensional stability and excellent mechanical property, and can meet the requirements of manufacturing materials of mobile phone camera frameworks. The invention also discloses a preparation method of the glass fiber reinforced nylon.
Description
Technical Field
The invention belongs to the technical field of nylon, and particularly relates to glass fiber reinforced nylon and a preparation method thereof.
Background
Polyamides are commonly known as nylons and are a generic name for polymers containing amide groups in the repeating units of the macromolecular main chain. The PA can be widely used for replacing copper and nonferrous metals to manufacture mechanical, chemical and electrical parts, such as a fuel pump gear of a diesel engine, a water pump, a high-pressure sealing ring, an oil delivery pipe and the like.
The camera framework of the mobile phone in the prior art is a component made of plastic. The requirements of the manufacturing material of the mobile phone camera framework are as follows: 1. the hardness is high; 2. the dimensional stability is good; 3. the mechanical property is excellent. The nylon materials on the market can not meet the requirements at the same time.
Disclosure of Invention
The invention aims to provide glass fiber reinforced nylon and a preparation method thereof, and aims to solve the technical problem that a nylon material in the prior art cannot simultaneously meet the requirements of a mobile phone camera framework manufacturing material.
In order to achieve the purpose, the invention provides glass fiber reinforced nylon which comprises the following raw materials in percentage by mass:
8-15% of PA 6;
8-15% of nylon mixture; the nylon mixture comprises the following raw materials in percentage by mass: 55-65% of PA66, 15-25% of PA12 and 15-25% of PA 9T;
0.5-1.5% of epoxy resin;
70-80% of glass fiber;
0.1-0.3% of nucleating agent;
0.2-0.4% of silane coupling agent;
0.2-0.4% of a lubricant;
0.2-0.4% of a dispersant;
0.2-0.4% of a flow modifier;
1-3% of a toughening agent;
0.1 to 1% of inorganic rigid particles;
0.4-4% of an elastomer;
0.1-0.5% of antioxidant; and
0.3 to 0.6% of toner.
Preferably, the inorganic rigid particles are selected from one or more of nano calcium carbonate particles, nano titanium dioxide particles or nano silicon dioxide particles; the particle size of the nano calcium carbonate particles is 100-150 nm; the nano titanium dioxide particles are rutile titanium dioxide particles, and the particle size of the nano titanium dioxide particles is 40-70 nm; the nano silicon dioxide particles are polymethyl methacrylate grafted nano silicon dioxide particles, and the chemical general formula of the nano silicon dioxide particles is SiO2-g-PMMA with a particle size of 60 to 80 nm.
Preferably, the elastomer is a compound blend of ethylene propylene diene monomer and maleic anhydride grafted ethylene propylene diene monomer, and the mass ratio of the ethylene propylene diene monomer to the maleic anhydride grafted ethylene propylene diene monomer is 1: 3-5; the mass ratio of the elastomer to the inorganic rigid particles is 4: 1.
preferably, the toughening agent is an EPDM-g-MAH toughening agent, and the EPDM-g-MAH toughening agent comprises the following raw materials in parts by weight: 96-102 parts by weight of EPDM, 1.5-2.5 parts by weight of MAH, 0.2-0.3 part by weight of DCP initiator and 0.1-0.3 part by weight of antioxidant.
Preferably, the structural general formula of the silane coupling agent is RnSiX(4-n)Wherein R is an organic functional group, X is methoxy or ethoxy, and n is 1, 2 or 3.
Preferably, the silane coupling agent is selected from one or more of gamma-glycidoxypropyltrimethoxysilane, gamma-aminopropyltriethoxysilane, gamma-ureidopropyltriethoxysilane and beta- (3, 4-epoxycyclohexyl) ethyltrimethoxysilane.
Preferably, the glass fiber is flat glass fiber, the cross section of the flat glass fiber is 24-30 micrometers long, and the flatness ratio is 3-5.
Preferably, the number average molecular weight of the PA6 is 12000-16000; the melt flow rate of the PA6 is 40-44 g/10 min.
Preferably, the epoxy resin is bisphenol a type glycidyl ether type epoxy resin.
The invention also provides a preparation method of the glass fiber reinforced nylon, which comprises the following steps:
1) weighing the elastomer and the inorganic rigid particles according to the proportion, and adding the elastomer and the inorganic rigid particles into an open mill for mixing for 15-25 minutes to obtain a reinforced master batch;
2) weighing PA66, PA12 and PA9T according to the proportion, and stirring and mixing to obtain a nylon mixture;
3) adding the reinforced master batch, the nylon mixture, PA6, epoxy resin, glass fiber, nucleating agent, silane coupling agent, lubricant, dispersant, flow modifier, toughening agent, antioxidant and toner into an extruder according to the proportion, wherein the feeding frequency is 7-10 Hz, and the screw speed is 340-370 r/min; the temperature of each zone of the extruder is respectively as follows: a first area: 220-240 ℃, and a second zone: 245-255 ℃, three zones: 245-255 ℃ and four regions: 245-255 ℃ and five zones: 220-240 ℃, six zones: 210-230 ℃, seven regions: 210-230 ℃, eight zones: 210-230 ℃; the temperature of the die head is 230-250 ℃; and extruding the molten material from a die head of an extruder, and granulating to obtain the glass fiber reinforced nylon.
One or more technical schemes in the high glass fiber nylon provided by the embodiment of the invention have at least one of the following technical effects:
1. the glass fiber reinforced nylon has the advantages of high hardness, good dimensional stability and excellent mechanical property, and can meet the requirements of manufacturing materials of mobile phone camera frameworks; through tests, the tensile strength of the glass fiber reinforced nylon can reach 235MPa, the tensile modulus can reach 20000MPa, the bending strength can reach 340MPa, the bending modulus can reach 1650MPa, and the notch impact strength of a simply supported beam can reach20kJ/m2The unnotched impact strength of the simply supported beam can reach 90kJ/m2The impact strength of the gap of the cantilever beam can reach 20kJ/m2。
2. The elastomer and the inorganic rigid particles in the glass fiber reinforced nylon are cooperated to toughen the PA6, and the bag-shaped structure of the elastomer coated inorganic rigid particles is constructed in the PA6 matrix and has a toughening effect on the nylon.
Detailed Description
The present invention will be further described with reference to the following examples, but the embodiments of the present invention are not limited thereto.
The embodiment of the invention provides glass fiber reinforced nylon which comprises the following raw materials in percentage by mass: 8-15% of PA 6; 8-15% of nylon mixture; 0.5-1.5% of epoxy resin; 70-80% of glass fiber; 0.1-0.3% of nucleating agent; 0.2-0.4% of silane coupling agent; 0.2-0.4% of a lubricant; 0.2-0.4% of a dispersant; 0.2-0.4% of a flow modifier; 1-3% of a toughening agent; 0.1 to 1% of inorganic rigid particles; 0.4-4% of an elastomer; 0.1-0.5% of antioxidant and 0.3-0.6% of toner. The nylon mixture comprises the following raw materials in percentage by mass: 55-65% of PA66, 15-25% of PA12 and 15-25% of PA 9T. The elastomer and the inorganic rigid particles in the glass fiber reinforced nylon are used for synergistically toughening the PA6, and a bag-shaped structure of the elastomer coated inorganic rigid particles is constructed in a PA6 matrix. When the bag-shaped structure is impacted, the inorganic rigid particles in the bag-shaped structure can be debonded from the elastomer to form a cavity at the interface, and due to the obstruction of the inorganic rigid particles, unstable fracture caused by cavitation is avoided, so that the inorganic rigid particles in the bag-shaped structure induce the microfibrillation of the nylon material to dissipate external impact energy.
Preferably, the inorganic rigid particles are selected from one or more of nano calcium carbonate particles, nano titanium dioxide particles and nano silicon dioxide particles, and more preferably are nano calcium carbonate particles.
The particle size of the nano calcium carbonate particles is 100-150 nm. Illustratively, the nano calcium carbonate particles have a particle size of 100nm, 120nm, or 150nm, more preferably 120 nm.
The nano titanium dioxide particles are rutile titanium dioxide particles, and the particle size of the nano titanium dioxide particles is 40-70 nm. Illustratively, the rutile titanium dioxide particles have a particle size of 40nm, 50nm, or 70nm, more preferably 50 nm.
The nano silicon dioxide particles are polymethyl methacrylate grafted nano silicon dioxide particles, and the chemical general formula of the nano silicon dioxide particles is SiO2-g-PMMA with a particle size of 60 to 80 nm. Illustratively, the nanosilica particles have a particle size of 60nm, 70nm or 80nm, more preferably 70 nm. The SiO2g-PMMA is nano SiO modified by PMMA2The particles have better thermal stability and dispersibility, and are favorable for improving the thermal stability and the flame retardant property of the nylon material.
Preferably, the elastomer is a compound blend of ethylene propylene diene monomer and maleic anhydride grafted ethylene propylene diene monomer, and the mass ratio of the ethylene propylene diene monomer to the maleic anhydride grafted ethylene propylene diene monomer is 1: 3 to 5. The mass ratio of the elastomer to the inorganic rigid particles is 4: 1.
preferably, the toughening agent is an EPDM-g-MAH toughening agent, and the EPDM-g-MAH toughening agent comprises the following raw materials in parts by weight: 96-102 parts by weight of EPDM, 1.5-2.5 parts by weight of MAH, 0.2-0.3 part by weight of DCP initiator and 0.1-0.3 part by weight of antioxidant. The EPDM-g-MAH toughening agent has obvious toughening effect on PA 6.
Preferably, the structural general formula of the silane coupling agent is RnSiX(4-n)Wherein R is an organic functional group, X is methoxy or ethoxy, and n is 1, 2 or 3. When the silane coupling agent is used for carrying out surface treatment on the glass fiber, X is hydrolyzed to generate silanol, hydrolysate is condensed into oligomer, and the oligomer and the glass fiber SiO are2Forming covalent bond, and coating the glass fiber surface with silane coupling agent. When the enhancement modification production is carried out, the silane coupling agent and the nylon matrix amido bond are subjected to chemical reaction, and the whole coupling process is completed.
Preferably, the silane coupling agent is selected from one or more of gamma-glycidoxypropyltrimethoxysilane, gamma-aminopropyltriethoxysilane, gamma-ureidopropyltriethoxysilane and beta- (3, 4-epoxycyclohexyl) ethyltrimethoxysilane. The silane coupling agent is more suitable for nylon materials.
Preferably, the glass fiber is flat glass fiber, the cross section of the flat glass fiber is 24-30 micrometers long, and the flatness ratio is 3-5. The flat glass fiber reinforced nylon material has more excellent mechanical strength, particularly notch impact strength, than conventional glass fiber, and is suitable for preparing products with high strength and high rigidity.
Preferably, the number average molecular weight of the PA6 is 12000-16000. The melt flow rate of the PA6 is 40-44 g/10 min. The high-fluidity PA6 not only maintains the mechanical property of high strength, but also has good surface appearance in the modification process of the high-glass fiber.
Preferably, the epoxy resin is bisphenol a type glycidyl ether type epoxy resin. The bisphenol A type glycidyl ether type epoxy resin is beneficial to toughening and impact modification of nylon materials.
The embodiment of the invention also provides a preparation method of the glass fiber reinforced nylon, which comprises the following steps:
1) weighing the elastomer and the inorganic rigid particles according to the proportion, and adding the elastomer and the inorganic rigid particles into an open mill for mixing for 15-25 minutes to obtain a reinforced master batch;
2) weighing PA66, PA12 and PA9T according to the proportion, and stirring and mixing to obtain a nylon mixture;
3) adding the reinforced master batch, the nylon mixture, PA6, epoxy resin, glass fiber, nucleating agent, silane coupling agent, lubricant, dispersant, flow modifier, toughening agent, antioxidant and toner into an extruder according to the proportion, wherein the feeding frequency is 7-10 Hz, and the screw speed is 340-370 r/min; the temperature of each zone of the extruder is respectively as follows: a first area: 220-240 ℃, and a second zone: 245-255 ℃, three zones: 245-255 ℃ and four regions: 245-255 ℃ and five zones: 220-240 ℃, six zones: 210-230 ℃, seven regions: 210-230 ℃, eight zones: 210-230 ℃; the temperature of the die head is 230-250 ℃; and extruding the molten material from a die head of an extruder, and granulating to obtain the glass fiber reinforced nylon.
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims.
The raw material ratios of examples 1 to 5 are shown in Table 1. In the following examples, the starting materials used were commercially available products.
TABLE 1
The raw material ratios of the nylon mixtures of examples 1 to 5 are shown in Table 2. In the following examples, the starting materials used were commercially available products.
TABLE 2
The raw material ratios of the toughening agents in examples 1 to 5 are shown in Table 3. In the following examples, the starting materials used were commercially available products.
TABLE 3
Example 1
The preparation method of the glass fiber reinforced nylon provided by the embodiment comprises the following steps:
1) weighing the elastomer and the inorganic rigid particles according to the proportion, and adding the elastomer and the inorganic rigid particles into an open mill for mixing for 15 minutes to obtain reinforced master batch;
2) weighing PA66, PA12 and PA9T according to the proportion, and stirring and mixing to obtain a nylon mixture;
3) adding the reinforced master batch, the nylon mixture, PA6, epoxy resin, glass fiber, nucleating agent, silane coupling agent, lubricant, dispersant, flow modifier, toughening agent, antioxidant and toner into an extruder according to the proportion, wherein the feeding frequency is 7Hz, and the screw speed is 340 r/min; the temperature of each zone of the extruder is respectively as follows: a first area: 220 ℃, zone two: 245 ℃, three zones: 245 ℃, four zones: 245 ℃, five zones: 220 ℃, six zones: 210 ℃, seven zones: 210 ℃, eight zones: at 210 ℃; the die temperature is 230 ℃; and extruding the molten material from a die head of an extruder, and granulating to obtain the glass fiber reinforced nylon.
Wherein the inorganic rigid particles are nano calcium carbonate particles. The particle size of the nano calcium carbonate particles is 120 nm.
The elastomer is a compound blend of ethylene propylene diene monomer and maleic anhydride grafted ethylene propylene diene monomer, and the mass ratio of the ethylene propylene diene monomer to the maleic anhydride grafted ethylene propylene diene monomer is 1: 3. the mass ratio of the elastomer to the inorganic rigid particles is 4: 1.
the silane coupling agent is gamma-glycidol ether oxygen propyl trimethoxy silane.
The glass fibers are flat glass fibers, available from Chongqing International composite Co. The flat glass fiber had a cross-sectional length of 24 microns and a width of 8 microns with a aspect ratio of 3.
The number average molecular weight of the PA6 was 12000. The melt flow rate of the PA6 was 40g/10 min.
The epoxy resin is bisphenol A type glycidyl ether type epoxy resin.
Example 2
The present embodiment is different from embodiment 1 in that: the preparation method of the glass fiber reinforced nylon provided by the embodiment comprises the following steps:
1) weighing the elastomer and the inorganic rigid particles according to the proportion, and adding the elastomer and the inorganic rigid particles into an open mill for mixing for 16 minutes to obtain reinforced master batch;
2) weighing PA66, PA12 and PA9T according to the proportion, and stirring and mixing to obtain a nylon mixture;
3) adding the reinforced master batch, the nylon mixture, PA6, epoxy resin, glass fiber, nucleating agent, silane coupling agent, lubricant, dispersant, flow modifier, toughening agent, antioxidant and toner into an extruder according to the proportion, wherein the feeding frequency is 8Hz, and the screw speed is 350 r/min; the temperature of each zone of the extruder is respectively as follows: a first area: 224 ℃, two zones: 248 ℃, three zones: 248 ℃, four zones: 248 ℃, five zones: 224 ℃, six zones: 214 ℃, seven zones: 214 ℃, eight zones: 214 ℃ of; the die head temperature is 232 ℃; and extruding the molten material from a die head of an extruder, and granulating to obtain the glass fiber reinforced nylon.
Wherein the inorganic rigid particles are nano titanium dioxide particles. The nano titanium dioxide particles are rutile type titanium dioxide particles, and the particle size of the nano titanium dioxide particles is 50 nm.
The elastomer is a compound blend of ethylene propylene diene monomer and maleic anhydride grafted ethylene propylene diene monomer, and the mass ratio of the ethylene propylene diene monomer to the maleic anhydride grafted ethylene propylene diene monomer is 1: 4. the mass ratio of the elastomer to the inorganic rigid particles is 4: 1.
the silane coupling agent is gamma-aminopropyl triethoxysilane.
The flat glass fiber had a cross-sectional length of 28 microns and a width of 7 microns with a aspect ratio of 4.
The number average molecular weight of the PA6 is 13000. The melt flow rate of the PA6 was 41g/10 min.
Example 3
The present embodiment is different from embodiment 1 in that: the preparation method of the glass fiber reinforced nylon provided by the embodiment comprises the following steps:
1) weighing the elastomer and the inorganic rigid particles according to the proportion, and adding the elastomer and the inorganic rigid particles into an open mill for mixing for 18 minutes to obtain reinforced master batch;
2) weighing PA66, PA12 and PA9T according to the proportion, and stirring and mixing to obtain a nylon mixture;
3) adding the reinforced master batch, the nylon mixture, PA6, epoxy resin, glass fiber, nucleating agent, silane coupling agent, lubricant, dispersant, flow modifier, toughening agent, antioxidant and toner into an extruder according to the proportion, wherein the feeding frequency is 8Hz, and the screw speed is 360 r/min; the temperature of each zone of the extruder is respectively as follows: a first area: 230 ℃, zone two: 250 ℃, three zones: 250 ℃, four zones: 250 ℃, five zones: 230 ℃, six zones: 220 ℃, seven zones: 220 ℃, eight zones: 220 ℃; the die head temperature is 240 ℃; and extruding the molten material from a die head of an extruder, and granulating to obtain the glass fiber reinforced nylon.
The inorganic rigid particles are nano silicon dioxide particles. The nano silicon dioxide particles are polymethyl methacrylate grafted nano silicon dioxide particles, and the chemical general formula of the nano silicon dioxide particles is SiO2-g-PMMA with a particle size of 70 nm.
The elastomer is a compound blend of ethylene propylene diene monomer and maleic anhydride grafted ethylene propylene diene monomer, and the mass ratio of the ethylene propylene diene monomer to the maleic anhydride grafted ethylene propylene diene monomer is 1: 5. the mass ratio of the elastomer to the inorganic rigid particles is 4: 1.
the silane coupling agent is gamma-ureidopropyltriethoxysilane.
The flat glass fiber had a cross-section of 30 microns in length and 6 microns in width with a aspect ratio of 5.
The number average molecular weight of the PA6 is 14000. The melt flow rate of the PA6 was 42g/10 min.
Example 4
The present embodiment is different from embodiment 1 in that: the preparation method of the glass fiber reinforced nylon provided by the embodiment comprises the following steps:
1) weighing the elastomer and the inorganic rigid particles according to the proportion, and adding the elastomer and the inorganic rigid particles into an open mill for mixing for 22 minutes to obtain reinforced master batch;
2) weighing PA66, PA12 and PA9T according to the proportion, and stirring and mixing to obtain a nylon mixture;
3) adding the reinforced master batch, the nylon mixture, PA6, epoxy resin, glass fiber, nucleating agent, silane coupling agent, lubricant, dispersant, flow modifier, toughening agent, antioxidant and toner into an extruder according to the proportion, wherein the feeding frequency is 9Hz, and the screw speed is 360 r/min; the temperature of each zone of the extruder is respectively as follows: a first area: 235 ℃, and a second zone: 252 ℃, three zones: 252 ℃, four zones: 252 ℃, five zones: 235 ℃ and six zones: 225 ℃, seven zones: 225 ℃, eight zones: 225 ℃; the die temperature was 245 ℃; and extruding the molten material from a die head of an extruder, and granulating to obtain the glass fiber reinforced nylon.
The particle size of the nano calcium carbonate particles is 100 nm.
The elastomer is a compound blend of ethylene propylene diene monomer and maleic anhydride grafted ethylene propylene diene monomer, and the mass ratio of the ethylene propylene diene monomer to the maleic anhydride grafted ethylene propylene diene monomer is 1: 4.5. the mass ratio of the elastomer to the inorganic rigid particles is 3: 1.
the silane coupling agent is beta- (3, 4-epoxy cyclohexyl) ethyl trimethoxy silane.
The number average molecular weight of the PA6 was 15000. The melt flow rate of the PA6 was 43g/10 min.
Example 5
The present embodiment is different from embodiment 1 in that: the preparation method of the glass fiber reinforced nylon provided by the embodiment comprises the following steps:
1) weighing the elastomer and the inorganic rigid particles according to the proportion, and adding the elastomer and the inorganic rigid particles into an open mill for mixing for 25 minutes to obtain reinforced master batch;
2) weighing PA66, PA12 and PA9T according to the proportion, and stirring and mixing to obtain a nylon mixture;
3) adding the reinforced master batch, the nylon mixture, PA6, epoxy resin, glass fiber, nucleating agent, silane coupling agent, lubricant, dispersant, flow modifier, toughening agent, antioxidant and toner into an extruder according to the proportion, wherein the feeding frequency is 10Hz, and the screw speed is 370 r/min; the temperature of each zone of the extruder is respectively as follows: a first area: 240 ℃, zone two: 255 ℃, three zones: 255 ℃, four zones: 255 ℃, five zones: 240 ℃, six zones: 230 ℃, seven zones: 230 ℃, eight zones: 230 ℃; the die head temperature is 250 ℃; and extruding the molten material from a die head of an extruder, and granulating to obtain the glass fiber reinforced nylon.
The particle size of the nano calcium carbonate particles is 150 nm.
The elastomer is a compound blend of ethylene propylene diene monomer and maleic anhydride grafted ethylene propylene diene monomer, and the mass ratio of the ethylene propylene diene monomer to the maleic anhydride grafted ethylene propylene diene monomer is 1: 5. the mass ratio of the elastomer to the inorganic rigid particles is 5: 1.
the number average molecular weight of the PA6 is 16000. The melt flow rate of the PA6 was 44g/10 min.
Example 6
In this example, the tensile strength, tensile modulus, bending strength, bending modulus, simple beam notched impact strength, simple beam unnotched impact strength, and cantilever beam notched impact strength of the glass fiber reinforced nylon prepared in examples 1 to 5 were measured, and the results are shown in table 3.
TABLE 3
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The glass fiber reinforced nylon is characterized by comprising the following raw materials in percentage by mass:
8-15% of PA 6;
8-15% of nylon mixture; the nylon mixture comprises the following raw materials in percentage by mass: 55-65% of PA66, 15-25% of PA12 and 15-25% of PA 9T;
0.5-1.5% of epoxy resin;
70-80% of glass fiber;
0.1-0.3% of nucleating agent;
0.2-0.4% of silane coupling agent;
0.2-0.4% of a lubricant;
0.2-0.4% of a dispersant;
0.2-0.4% of a flow modifier;
1-3% of a toughening agent;
0.1 to 1% of inorganic rigid particles;
0.4-4% of an elastomer;
0.1-0.5% of antioxidant; and
0.3 to 0.6% of toner.
2. The glass fiber reinforced nylon according to claim 1, wherein the inorganic rigid particles are selected from one or more of nano calcium carbonate particles, nano titanium dioxide particles and nano silica particles; the particle size of the nano calcium carbonate particles is 100-150 nm; the nano titanium dioxide particles are rutile titanium dioxide particles, and the particle size of the nano titanium dioxide particles is 40-70 nm; the nano silicon dioxide particles are polymethyl methacrylate grafted nano silicon dioxide particles, and the chemical general formula of the nano silicon dioxide particles is SiO2-g-PMMA with a particle size of 60 to 80 nm.
3. The glass fiber reinforced nylon of claim 1, wherein the elastomer is a compounded blend of ethylene propylene diene monomer and maleic anhydride grafted ethylene propylene diene monomer, and the mass ratio of the ethylene propylene diene monomer to the maleic anhydride grafted ethylene propylene diene monomer is 1: 3-5; the mass ratio of the elastomer to the inorganic rigid particles is 4: 1.
4. the glass fiber reinforced nylon of claim 1, wherein the toughening agent is an EPDM-g-MAH toughening agent, and the EPDM-g-MAH toughening agent comprises the following raw materials in parts by weight: 96-102 parts by weight of EPDM, 1.5-2.5 parts by weight of MAH, 0.2-0.3 part by weight of DCP initiator and 0.1-0.3 part by weight of antioxidant.
5. The glass fiber reinforced nylon of claim 1, wherein the silane coupling agent has a general structural formula of RnSiX(4-n)Wherein R is an organic functional group, X is methoxy or ethoxy, and n is 1, 2 or 3.
6. The glass fiber reinforced nylon according to claim 1 or 5, wherein the silane coupling agent is one or more selected from the group consisting of gamma-glycidoxypropyltrimethoxysilane, gamma-aminopropyltriethoxysilane, gamma-ureidopropyltriethoxysilane, and beta- (3, 4-epoxycyclohexyl) ethyltrimethoxysilane.
7. The glass fiber reinforced nylon of claim 1, wherein the glass fiber is a flat glass fiber, the cross section of the flat glass fiber is 24-30 microns long, and the aspect ratio is 3-5.
8. The glass fiber reinforced nylon according to claim 1, wherein the PA6 has a number average molecular weight of 12000-16000; the melt flow rate of the PA6 is 40-44 g/10 min.
9. The glass fiber reinforced nylon of claim 1, wherein the epoxy resin is bisphenol A glycidyl ether type epoxy resin.
10. The preparation method of the glass fiber reinforced nylon according to any one of claims 1 to 9, which is characterized by comprising the following steps:
1) weighing the elastomer and the inorganic rigid particles according to the proportion, and adding the elastomer and the inorganic rigid particles into an open mill for mixing for 15-25 minutes to obtain a reinforced master batch;
2) weighing PA66, PA12 and PA9T according to the proportion, and stirring and mixing to obtain a nylon mixture;
3) adding the reinforced master batch, the nylon mixture, PA6, epoxy resin, glass fiber, nucleating agent, silane coupling agent, lubricant, dispersant, flow modifier, toughening agent, antioxidant and toner into an extruder according to the proportion, wherein the feeding frequency is 7-10 Hz, and the screw speed is 340-370 r/min; the temperature of each zone of the extruder is respectively as follows: a first area: 220-240 ℃, and a second zone: 245-255 ℃, three zones: 245-255 ℃ and four regions: 245-255 ℃ and five zones: 220-240 ℃, six zones: 210-230 ℃, seven regions: 210-230 ℃, eight zones: 210-230 ℃; the temperature of the die head is 230-250 ℃; and extruding the molten material from a die head of an extruder, and granulating to obtain the glass fiber reinforced nylon.
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