CN113201171A - Method for modifying glass fiber by using cyano silane coupling agent, modified glass fiber reinforced nylon composite material and preparation method thereof - Google Patents

Method for modifying glass fiber by using cyano silane coupling agent, modified glass fiber reinforced nylon composite material and preparation method thereof Download PDF

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CN113201171A
CN113201171A CN202110442370.0A CN202110442370A CN113201171A CN 113201171 A CN113201171 A CN 113201171A CN 202110442370 A CN202110442370 A CN 202110442370A CN 113201171 A CN113201171 A CN 113201171A
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glass fiber
silane coupling
coupling agent
antioxidant
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纪冠丞
张磊
李季
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Jiangxi Hungpai New Material Co ltd
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    • C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
    • C08J5/06—Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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Abstract

A method for modifying glass fiber by a cyano silane coupling agent, a modified glass fiber reinforced nylon composite material and a preparation method thereof relate to a method for modifying glass fiber and a method for modifying a glass fiber reinforced nylon composite material, and belong to the field of preparation of composite materials. The method for modifying the glass fiber comprises the following steps: and calcining the glass fiber, adding the glass fiber into the impregnating compound, soaking and drying to finish the process. The cyano silane coupling agent modified glass fiber reinforced nylon composite material is prepared from nylon resin, cyano silane coupling agent modified glass fiber and other auxiliary agents. The dosage of the cyano silane coupling agent is below 1 percent, so that a very high reinforcing effect can be achieved; compared with a silane coupling agent KH550 and a KH560 modified glass fiber reinforced nylon, the modified glass fiber reinforced nylon has more advantages in mechanical property.

Description

Method for modifying glass fiber by using cyano silane coupling agent, modified glass fiber reinforced nylon composite material and preparation method thereof
Technical Field
The invention relates to a method for modifying glass fiber and a method for modifying a glass fiber reinforced nylon composite material, belonging to the field of preparation of composite materials.
Background
Compared with other plastics, nylon as engineering plastics has the remarkable characteristics. Nylon is a semi-rigid plastic, tough in texture, has good mechanical properties, particularly impact resistance, and is not comparable to other plastics. It has low friction coefficient and less wear, and may be used as self-lubricating material for making transmission part. In addition, the nylon also has the advantages of excellent chemical corrosion resistance, electrical property, convenient molding and processing, and the like. However, nylon is used as a structural member because of its large creep property, low heat resistance, large shrinkage rate and poor dimensional stability. This limits the range of use of nylon. The glass fiber is adopted for reinforcement, so that the defects can be improved, and the application range is enlarged.
The physical and mechanical properties of the matrix can be improved by matching the glass fiber with the resin, the reinforcing effect mainly depends on the firm adhesion of the fiber material and the matrix, and the silane coupling agents KH550 and KH560 are adopted in patent CN105623250 to treat the glass fiber, so that a good interface is provided for the adhesion between the glass fiber and the polymer matrix, and the purpose of improving the performance of the composite material is achieved. However, the amount of the silane coupling agent is larger and is 1.5-4.0% of the whole component, and patent CN109180027 adopts silane coupling agent with vinyl, epoxy, amino, and amide groups as surface modifier of glass fiber to increase the strength, toughness, and corrosion resistance of glass fiber and increase the application range of glass fiber, but the amount of the silane coupling agent is larger and is 10-20 parts, which results in higher cost, and the common silane coupling agent cannot achieve an optimal bonding force between glass fiber and nylon resin interface, and limits further application in some fields.
Disclosure of Invention
The invention aims to solve the technical problems that the cost is high due to the fact that the use amount of a silane coupling agent is large when the glass fiber is treated by the existing silane coupling agent, and the bonding force of the interface of the existing silane modified glass fiber and nylon resin is relatively poor, and provides a method for modifying the glass fiber by using a cyano silane coupling agent and a method for modifying a glass fiber reinforced nylon composite material by using the cyano silane coupling agent.
The invention firstly uses a cyano silane coupling agent as a glass fiber surface modifier, aims at solving the technical problem of high cost caused by large using amount of a silane coupling agent when the glass fiber is treated by the existing silane coupling agent, and provides a method for modifying the glass fiber by the cyano silane coupling agent.
The preparation method of the glass fiber comprises the following steps:
crushing blocky raw materials of quartz sand, pyrophyllite, limestone and dolomite into powder, adding a cosolvent, a clarifying agent and an oxidant to prepare a batch, then melting into molten glass, clarifying, homogenizing and conditioning the molten glass to 1500-1600 ℃, then flowing into a liquid flow tank, flowing out from a plurality of rows of porous platinum bushing plates to form fibers, cooling to 60-100 ℃ by a cooler, and drawing and winding the fibers into protofilaments by a high-speed rotating drawbench to obtain the continuous glass fibers.
The continuous glass fiber was cut with a special cutting device to obtain a chopped glass fiber (taishan glass fiber T439).
The method for modifying the glass fiber by the cyano silane coupling agent is characterized by comprising the following steps:
calcining the glass fiber at the temperature of 400 ℃ for 2-4h, then adding the glass fiber into the impregnating compound, soaking for 3h at the temperature of 60-100 ℃, taking out, and drying at 100 ℃ for 4-8h to finish the modification of the glass fiber by the cyano silane coupling agent;
the impregnating compound is prepared by dissolving polymethacrylic acid emulsion, polyurethane emulsion, a lubricant, an antistatic agent and a cyano silane coupling agent in deionized water and adjusting the pH value to 3-5 by using a pH value regulator;
wherein the mass concentration of the polymethacrylic acid emulsion is 8-12%, the mass concentration of the polyurethane emulsion is 6-15%, the mass concentration of the lubricant is 0.01-0.07%, the mass concentration of the antistatic agent is 0.01-3%, and the mass concentration of the cyano silane coupling agent is 0.5-2.0%.
The lubricant is paraffin, polyethylene glycol PEG-6000 or glyceride.
The antistatic agent is polyoxyethylene castor oil, polyoxyethylene laurate or polyethylene glycol.
The cyano silane coupling agent is (2-cyanoethyl) triethoxysilane, 2-cyanoethyl trimethoxysilane or (2-cyanoethyl) triethoxysilane.
The pH value regulator is formic acid, acetic acid, citric acid or oxalic acid.
The glass fibers are chopped glass fibers or continuous glass fibers.
The cyano silane coupling agent modified glass fiber reinforced nylon composite material is prepared from 60-95 parts by weight of nylon resin, 5-40 parts by weight of cyano silane coupling agent modified glass fiber and 0-25 parts by weight of other auxiliary agents;
the other auxiliary agents are one or more of a heat stabilizer, an antioxidant, a flame retardant, a lubricant, a glass fiber leakage preventing agent, a compatilizer and an antistatic agent;
according to the parts by weight, 0-5.0 parts of heat stabilizer, 0-2.0 parts of antioxidant, 0-5.0 parts of flame retardant, 0-1.0 part of lubricant, 0-1.0 part of glass fiber leakage preventing agent, 0-10.0 parts of compatilizer and 0-1.0 part of antistatic agent;
the heat stabilizer is one or a mixture of more of a calcium zinc stabilizer, aluminum stearate, barium stearate, talcum powder and nano zirconium phosphate;
the antioxidant is prepared by mixing a main antioxidant and an auxiliary antioxidant according to the mass ratio of 1: 2;
the flame retardant is an organic phosphorus halogen-free flame retardant or a nitrogen halogen-free flame retardant;
the type of the organic phosphorus halogen-free flame retardant is
Figure BDA0003035659930000031
LFR-8003 or
Figure BDA0003035659930000032
LFR-5008；
The nitrogen-based halogen-free flame retardant is FR 6010;
the lubricant is pentaerythritol tetrastearate, calcium stearate or N, N' -ethylene bisstearamide;
the glass fiber leakage preventing agent is a glass fiber leakage preventing agent TAF;
the compatilizer is maleic anhydride grafted polyethylene-octene copolymer;
the antistatic agent is a polyether amide block copolymer;
the nylon resin is nylon 6 or nylon 66.
The main antioxidant is one or a mixture of two of an antioxidant 1010 and an antioxidant 1098 in any ratio; the auxiliary antioxidant is one or a mixture of two of the antioxidant 626 and the antioxidant 168 according to any ratio.
The preparation method of the cyano silane coupling agent modified glass fiber reinforced nylon composite material comprises the following steps:
firstly, drying 60-95 parts by weight of nylon resin at 80 ℃ for 10 hours in vacuum, and drying 5-40 parts by weight of cyano silane coupling agent modified glass fiber at 60 ℃ for 8 hours;
and secondly, mixing the nylon resin and 0-25 parts by weight of other auxiliary agents in a high-speed mixer for 3-5 minutes to obtain a mixture, adding a cyano silane coupling agent modified glass fiber into a fiber adding port of a double-screw extruder, adding the mixture into a main material port, then performing melt blending at 220-260 ℃, extruding and granulating, wherein the rotating speed of a charging barrel is 15r/min, the rotating speed of a screw is 150-200r/min, and finally drying the granules in an oven at 80 ℃ for 10 hours to obtain the cyano silane coupling agent modified glass fiber reinforced nylon composite material.
The method of the invention has the following advantages:
(1) the dosage of the cyano silane coupling agent is below 1 percent, so that a very high reinforcing effect can be achieved;
(2) compared with a silane coupling agent KH550 and a KH560 modified glass fiber reinforced nylon, the modified glass fiber reinforced nylon has more advantages in mechanical property.
Drawings
FIG. 1 is a flow chart of a process for making glass fibers according to one embodiment;
FIG. 2 is an SEM micrograph of the impact fracture morphology of the modified glass fiber reinforced nylon composite prepared in experiment one;
FIG. 3 is an SEM micrograph of the impact fracture morphology of the modified glass fiber reinforced nylon composite prepared in experiment two;
FIG. 4 is an SEM micrograph of the impact fracture morphology of the modified glass fiber reinforced nylon composite material prepared in experiment three.
Detailed Description
The technical solution of the present invention is not limited to the following specific embodiments, but includes any combination of the specific embodiments.
The first embodiment is as follows: the preparation method of the glass fiber of the present embodiment with reference to fig. 1 is as follows:
firstly, bulk raw materials of quartz sand, pyrophyllite, limestone and dolomite are fed into a factory, crushed and screened into qualified powder, the qualified powder is conveyed to a large bunker by air, then cosolvent, clarifying agent and oxidizing agent are weighed and mixed to prepare batch mixture, the batch mixture is conveyed to a kiln head bunker kiln by air to be melted, and the batch mixture is put into a unit melting kiln by a spiral batch feeder to be melted into molten glass. The melted glass liquid flows out from the melting part of the unit melting furnace, then enters the main passage (or called clarification homogenization or regulation passage) for further clarification homogenization and temperature regulation to 1500-1600 ℃, then flows into the liquid tank through the transition passage (or called distribution passage) and the operation passage (or called forming passage), and flows out from a plurality of rows of porous platinum bushing plates to form fibers. And cooling the glass fiber by a cooler to 60-100 ℃, coating the sizing agent on a monofilament oiling device, and then drawing and winding the glass fiber into protofilaments by a high-speed rotating drawing machine to obtain the continuous glass fiber. The process flow diagram is shown in figure 1.
The continuous glass fiber was cut with a special cutting device to obtain a chopped glass fiber (taishan glass fiber T439).
The method for modifying the glass fiber by the cyano silane coupling agent comprises the following steps:
calcining the glass fiber at the temperature of 400 ℃ for 2-4h, then adding the glass fiber into the impregnating compound, soaking for 3h at the temperature of 60-100 ℃, taking out, and drying at 100 ℃ for 4-8h to finish the modification of the glass fiber by the cyano silane coupling agent;
the impregnating compound is prepared by dissolving polymethacrylic acid emulsion, polyurethane emulsion, a lubricant, an antistatic agent and a cyano silane coupling agent in deionized water and adjusting the pH value to 3-5 by using a pH value regulator;
wherein the mass concentration of the polymethacrylic acid emulsion is 8-12%, the mass concentration of the polyurethane emulsion is 6-15%, the mass concentration of the lubricant is 0.01-0.07%, the mass concentration of the antistatic agent is 0.01-3%, and the mass concentration of the cyano silane coupling agent is 0.5-2.0%.
The second embodiment is as follows: this embodiment differs from the first embodiment in that the lubricant is paraffin, polyethylene glycol PEG-6000 (le day chemistry) or glycerol esters. The rest is the same as the first embodiment.
The third concrete implementation mode: this embodiment is different from the first or second embodiment in that the antistatic agent is polyoxyethylene castor oil, polyoxyethylene laurate or polyethylene glycol. The others are the same as in the first or second embodiment.
The fourth concrete implementation mode: this embodiment is different from one of the first to third embodiments in that the cyanosilane coupling agent is (2-cyanoethyl) triethoxysilane, 2-cyanoethyltrimethoxysilane, or (2-cyanoethyl) triethoxysilane. The rest is the same as one of the first to third embodiments.
The fifth concrete implementation mode: this embodiment differs from one of the first to fourth embodiments in that the pH adjuster is formic acid, acetic acid, citric acid, or oxalic acid. The rest is the same as one of the first to fourth embodiments.
The sixth specific implementation mode: this embodiment is different from one of the first to fifth embodiments in that the glass fiber is a chopped glass fiber or a continuous glass fiber. The rest is the same as one of the first to fifth embodiments.
The seventh embodiment: the cyano silane coupling agent modified glass fiber reinforced nylon composite material is prepared from 60-95 parts by weight of nylon resin, 5-40 parts by weight of cyano silane coupling agent modified glass fiber and 0-25 parts by weight of other auxiliary agents;
the other auxiliary agents are one or more of a heat stabilizer, an antioxidant, a flame retardant, a lubricant, a glass fiber leakage preventing agent, a compatilizer and an antistatic agent;
according to the parts by weight, 0-5.0 parts of heat stabilizer, 0-2.0 parts of antioxidant, 0-5.0 parts of flame retardant, 0-1.0 part of lubricant, 0-1.0 part of glass fiber leakage preventing agent, 0-10.0 parts of compatilizer and 0-1.0 part of antistatic agent;
the heat stabilizer is one or a mixture of more of a calcium zinc stabilizer, aluminum stearate, barium stearate, talcum powder and nano zirconium phosphate;
the antioxidant is prepared by mixing a main antioxidant and an auxiliary antioxidant according to the mass ratio of 1: 2;
the flame retardant is an organic phosphorus halogen-free flame retardant or a nitrogen halogen-free flame retardant;
the type of the organic phosphorus halogen-free flame retardant is
Figure BDA0003035659930000051
LFR-8003 or
Figure BDA0003035659930000052
LFR-5008, produced by Risk Liscan New materials Ltd;
the nitrogen-based halogen-free flame retardant is FR6010, produced by Guangzhou green Yanyan chemical Co., Ltd;
the lubricant is pentaerythritol tetrastearate (brand: LONZA, USA LONZA, model: lubricant)
Figure BDA0003035659930000053
P; ) Calcium stearate (molecular formula: c17H35COO2Ca) or N, N' -ethylene bis stearamide (type: WAX 2000, series brands: plastic materials ltd, venture success);
the glass fiber leakage preventing agent is a glass fiber leakage preventing agent TAF;
the compatilizer is maleic anhydride grafted polyethylene-octene copolymer;
the antistatic agent is a polyetheramide block copolymer.
In the present embodiment, when the other auxiliary agent and the heat stabilizer are a mixture, the ratio of the components is arbitrary.
The specific implementation mode is eight: the seventh embodiment is different from the first embodiment in that the nylon resin is nylon 6 or nylon 66. The rest is the same as the seventh embodiment.
The specific implementation method nine: the seventh or eighth embodiment is different from the seventh or eighth embodiment in that the primary antioxidant is a mixture of one or two of an antioxidant 1010 and an antioxidant 1098 in any ratio; the auxiliary antioxidant is one or a mixture of two of the antioxidant 626 and the antioxidant 168 according to any ratio. The others are the same as the seventh or eighth embodiments. In this embodiment, the ratio of the components is arbitrary when the primary antioxidant is a mixture, and the ratio of the components is arbitrary when the secondary antioxidant is a mixture.
The detailed implementation mode is ten: the preparation method of the cyano silane coupling agent modified glass fiber reinforced nylon composite material comprises the following steps:
firstly, drying 60-95 parts by weight of nylon resin at 80 ℃ for 10 hours in vacuum, and drying 5-40 parts by weight of cyano silane coupling agent modified glass fiber at 60 ℃ for 8 hours;
and secondly, mixing the nylon resin and 0-25 parts by weight of other auxiliary agents in a high-speed mixer for 3-5 minutes to obtain a mixture, adding a cyano silane coupling agent modified glass fiber into a fiber adding port of a double-screw extruder, adding the mixture into a main material port, then performing melt blending at 220-260 ℃, extruding and granulating, wherein the rotating speed of a charging barrel is 15r/min, the rotating speed of a screw is 150-200r/min, and finally drying the granules in an oven at 80 ℃ for 10 hours to obtain the cyano silane coupling agent modified glass fiber reinforced nylon composite material.
The following experiments are adopted to verify the effect of the invention:
experiment one:
the method for modifying the glass fiber reinforced nylon composite material in the experiment comprises the following steps:
firstly, 75 parts by weight of nylon 6 are dried for 10 hours under vacuum at 80 ℃, and 22 parts by weight of glass fiber which is subjected to surface treatment by KH550 with the mass concentration of 2.0 percent is dried for 8 hours at 60 ℃;
secondly, mixing the nylon resin and other auxiliary agents in a high-speed mixer for 5 minutes, adding the glass fiber treated in the first step into a fiber adding port of a double-screw extruder, adding the mixture into a main material port, then carrying out melt blending at 230 ℃, then carrying out extrusion granulation, wherein the rotating speed of a charging barrel is 15r/min, the rotating speed of a screw is 150r/min, and finally drying the granules in an oven at 80 ℃ for 10 hours. And preparing a required sample piece according to the test standard by an injection molding machine.
The other auxiliary agents comprise 2 parts by weight of heat stabilizer barium stearate and 1 part by weight of antioxidant (the antioxidant 1010 and the antioxidant 168 are mixed according to the mass ratio of 1: 2).
Experiment two:
the method for modifying the glass fiber reinforced nylon composite material in the experiment comprises the following steps:
firstly, 75 parts by weight of nylon 6 are dried in vacuum at 80 ℃ for 10 hours, and 22 parts by weight of glass fiber which is subjected to surface treatment by KH560 with the mass concentration of 2.0 percent is dried at 60 ℃ for 8 hours;
secondly, mixing the nylon resin and other auxiliary agents in a high-speed mixer for 5 minutes, adding the glass fiber treated in the first step into a fiber adding port of a double-screw extruder, adding the mixture into a main material port, then carrying out melt blending at 230 ℃, then carrying out extrusion granulation, wherein the rotating speed of a charging barrel is 15r/min, the rotating speed of a screw is 150r/min, and finally drying the granules in an oven at 80 ℃ for 10 hours. And preparing a required sample piece according to the test standard by an injection molding machine.
The other auxiliary agents comprise 2 parts by weight of stabilizer barium stearate and 1 part by weight of antioxidant (the antioxidant 1010 and the antioxidant 168 are mixed according to the mass ratio of 1: 2).
Experiment three:
the method for modifying the glass fiber by the cyano silane coupling agent comprises the following steps:
calcining the glass fiber at the temperature of 400 ℃ for 3h, then adding the glass fiber into the impregnating compound, soaking for 3h at the temperature of 80 ℃, taking out, and drying at the temperature of 100 ℃ for 4-8h to finish modifying the glass fiber by the cyano silane coupling agent;
the impregnating compound is prepared by dissolving polymethacrylic acid emulsion, polyurethane emulsion, lubricant, antistatic agent and cyano silane coupling agent in deionized water and adjusting the pH value to 3 by using a pH value regulator;
wherein the mass concentration of the polymethacrylic acid emulsion is 10 percent, the mass concentration of the polyurethane emulsion is 10 percent, the mass concentration of the lubricant is 0.06 percent, the mass concentration of the antistatic agent is 1 percent, and the mass concentration of the cyano silane coupling agent is 1.0 percent.
The lubricant is paraffin.
The antistatic agent is polyoxyethylene castor oil.
The cyano silane coupling agent is (2-cyanoethyl) triethoxysilane.
The pH value regulator is formic acid.
The glass fibers are chopped glass fibers.
The method for modifying the glass fiber reinforced nylon composite material in the experiment comprises the following steps:
firstly, 75 parts by weight of nylon 6 are dried for 10 hours under vacuum at 80 ℃, and 22 parts by weight of glass fiber which is subjected to surface treatment by cyanoethyl triethoxysilane with the mass concentration of 1.0 percent is dried for 8 hours at 60 ℃;
secondly, mixing the nylon resin and other auxiliary agents in a high-speed mixer for 5 minutes, adding the glass fiber treated in the first step into a fiber adding port of a double-screw extruder, adding the mixture into a main material port, then carrying out melt blending at 230 ℃, then carrying out extrusion granulation, wherein the rotating speed of a charging barrel is 15r/min, the rotating speed of a screw is 150r/min, and finally drying the granules in an oven at 80 ℃ for 10 hours. And preparing a required sample piece according to the test standard by an injection molding machine.
The other auxiliary agents comprise 2 parts by weight of stabilizer barium stearate and 1 part by weight of antioxidant (the antioxidant 1010 and the antioxidant 168 are mixed according to the mass ratio of 1: 2).
The properties of the modified glass fiber reinforced nylon 6 composite material prepared in the first experiment to the third experiment are as follows:
TABLE 1
Figure BDA0003035659930000071
As can be seen from Table 1, the modified glass fiber reinforced nylon 6 composite material prepared by the method of the present invention has improved impact strength, tensile strength and flexural modulus.

Claims (10)

1. The method for modifying the glass fiber by the cyano silane coupling agent is characterized by comprising the following steps:
calcining the glass fiber at the temperature of 400 ℃ for 2-4h, then adding the glass fiber into the impregnating compound, soaking for 3h at the temperature of 60-100 ℃, taking out, and drying at 100 ℃ for 4-8h to finish the modification of the glass fiber by the cyano silane coupling agent;
the impregnating compound is prepared by dissolving polymethacrylic acid emulsion, polyurethane emulsion, lubricant, antistatic agent and cyano silane coupling agent in deionized water and adjusting the pH value to 3-5 by using a pH value regulator;
wherein the mass concentration of the polymethacrylic acid emulsion is 8-12%, the mass concentration of the polyurethane emulsion is 6-15%, the mass concentration of the lubricant is 0.01-0.07%, the mass concentration of the antistatic agent is 0.01-3%, and the mass concentration of the cyano silane coupling agent is 0.5-2.0%.
2. The method of claim 1, wherein the lubricant is paraffin wax, polyethylene glycol PEG-6000 or glycerol ester.
3. The method of claim 1, wherein the antistatic agent is a polyoxyethylated castor oil, a polyoxyethylated laurate or a polyethylene glycol.
4. The method of claim 1, wherein the cyanosilane coupling agent is (2-cyanoethyl) triethoxysilane, 2-cyanoethyltrimethoxysilane, or (2-cyanoethyl) triethoxysilane.
5. The method of claim 1, wherein the pH adjusting agent is formic acid, acetic acid, citric acid, or oxalic acid.
6. The method of claim 1, wherein the glass fiber is chopped glass fiber or continuous glass fiber.
7. The modified glass fiber reinforced nylon composite material is characterized in that the cyano silane coupling agent modified glass fiber reinforced nylon composite material is prepared from 60-95 parts by weight of nylon resin, 5-40 parts by weight of cyano silane coupling agent modified glass fiber and 0-25 parts by weight of other auxiliary agents;
the other auxiliary agents are one or more of a heat stabilizer, an antioxidant, a flame retardant, a lubricant, a glass fiber leakage preventing agent, a compatilizer and an antistatic agent;
0-5.0 parts of heat stabilizer, 0-2.0 parts of antioxidant, 0-5.0 parts of flame retardant, 0-1.0 part of lubricant, 0-1.0 part of glass fiber leakage preventing agent, 0-10.0 parts of compatilizer and 0-1.0 part of antistatic agent;
the heat stabilizer is one or a mixture of more of a calcium zinc stabilizer, aluminum stearate, barium stearate, talcum powder and nano zirconium phosphate;
the antioxidant is prepared by mixing a main antioxidant and an auxiliary antioxidant according to the mass ratio of 1: 2;
the flame retardant is an organic phosphorus halogen-free flame retardant or a nitrogen halogen-free flame retardant;
the type of the organic phosphorus halogen-free flame retardant is
Figure FDA0003035659920000021
LFR-8003 or
Figure FDA0003035659920000022
LFR-5008；
The nitrogen-based halogen-free flame retardant is FR 6010;
the lubricant is pentaerythritol tetrastearate, calcium stearate or N, N' -ethylene bisstearamide;
the glass fiber leakage preventing agent is a glass fiber leakage preventing agent TAF;
the compatilizer is maleic anhydride grafted polyethylene-octene copolymer;
the antistatic agent is a polyetheramide block copolymer.
8. The modified glass fiber reinforced nylon composite of claim 7, wherein the nylon resin is nylon 6 or nylon 66.
9. The modified glass fiber reinforced nylon composite material as claimed in claim 7, wherein the primary antioxidant is one or a mixture of two of antioxidant 1010 and antioxidant 1098 at any ratio; the auxiliary antioxidant is one or a mixture of two of the antioxidant 626 and the antioxidant 168 according to any ratio.
10. The method for preparing the modified glass fiber reinforced nylon composite material as claimed in claim 7, wherein the method for preparing the modified glass fiber reinforced nylon composite material comprises the following steps:
firstly, 60-95 parts by weight of nylon resin is dried for 10 hours in vacuum at 80 ℃, and 5-40 parts by weight of cyano silane coupling agent modified glass fiber is dried for 8 hours at 60 ℃;
secondly, mixing the nylon resin and 0-25 parts by weight of other auxiliary agents in a high-speed mixer for 3-5 minutes to obtain a mixture, adding the cyano silane coupling agent modified glass fiber into a fiber adding port of a double-screw extruder, adding the mixture into a main material port, then performing melt blending at the temperature of 220-260 ℃, extruding and granulating, wherein the rotating speed of a charging barrel is 15r/min, the rotating speed of a screw is 150-200r/min, and finally drying the granules in an oven at the temperature of 80 ℃ for 10 hours to obtain the cyano silane coupling agent modified glass fiber reinforced nylon composite material.
CN202110442370.0A 2021-04-23 2021-04-23 Method for modifying glass fiber by using cyano silane coupling agent, modified glass fiber reinforced nylon composite material and preparation method thereof Pending CN113201171A (en)

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Application publication date: 20210803