CN116731509B - Nylon 66 toughened heat insulation strip and preparation method thereof - Google Patents
Nylon 66 toughened heat insulation strip and preparation method thereof Download PDFInfo
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- 229920002302 Nylon 6,6 Polymers 0.000 title claims abstract description 54
- 238000009413 insulation Methods 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000003365 glass fiber Substances 0.000 claims abstract description 96
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 21
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 21
- 239000005062 Polybutadiene Substances 0.000 claims abstract description 19
- 229920002857 polybutadiene Polymers 0.000 claims abstract description 19
- QNAYBMKLOCPYGJ-REOHCLBHSA-N L-alanine Chemical compound C[C@H](N)C(O)=O QNAYBMKLOCPYGJ-REOHCLBHSA-N 0.000 claims abstract description 16
- 235000004279 alanine Nutrition 0.000 claims abstract description 16
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 15
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 13
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 13
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 13
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 10
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 10
- 239000000314 lubricant Substances 0.000 claims abstract description 8
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 238000001035 drying Methods 0.000 claims description 23
- 230000005251 gamma ray Effects 0.000 claims description 23
- 238000005406 washing Methods 0.000 claims description 23
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 20
- 238000001125 extrusion Methods 0.000 claims description 20
- 239000008187 granular material Substances 0.000 claims description 18
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 9
- 238000005469 granulation Methods 0.000 claims description 9
- 230000003179 granulation Effects 0.000 claims description 9
- 230000007935 neutral effect Effects 0.000 claims description 9
- 238000007493 shaping process Methods 0.000 claims description 9
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 claims description 5
- 238000009210 therapy by ultrasound Methods 0.000 claims description 5
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 4
- 235000013539 calcium stearate Nutrition 0.000 claims description 4
- 239000008116 calcium stearate Substances 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 3
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims description 3
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 12
- 229910000838 Al alloy Inorganic materials 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 238000005303 weighing Methods 0.000 description 6
- GPNYZBKIGXGYNU-UHFFFAOYSA-N 2-tert-butyl-6-[(3-tert-butyl-5-ethyl-2-hydroxyphenyl)methyl]-4-ethylphenol Chemical compound CC(C)(C)C1=CC(CC)=CC(CC=2C(=C(C=C(CC)C=2)C(C)(C)C)O)=C1O GPNYZBKIGXGYNU-UHFFFAOYSA-N 0.000 description 5
- 239000002131 composite material Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- KGRVJHAUYBGFFP-UHFFFAOYSA-N 2,2'-Methylenebis(4-methyl-6-tert-butylphenol) Chemical compound CC(C)(C)C1=CC(C)=CC(CC=2C(=C(C=C(C)C=2)C(C)(C)C)O)=C1O KGRVJHAUYBGFFP-UHFFFAOYSA-N 0.000 description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- HXIQYSLFEXIOAV-UHFFFAOYSA-N 2-tert-butyl-4-(5-tert-butyl-4-hydroxy-2-methylphenyl)sulfanyl-5-methylphenol Chemical compound CC1=CC(O)=C(C(C)(C)C)C=C1SC1=CC(C(C)(C)C)=C(O)C=C1C HXIQYSLFEXIOAV-UHFFFAOYSA-N 0.000 description 1
- MQWCQFCZUNBTCM-UHFFFAOYSA-N 2-tert-butyl-6-(3-tert-butyl-2-hydroxy-5-methylphenyl)sulfanyl-4-methylphenol Chemical compound CC(C)(C)C1=CC(C)=CC(SC=2C(=C(C=C(C)C=2)C(C)(C)C)O)=C1O MQWCQFCZUNBTCM-UHFFFAOYSA-N 0.000 description 1
- VSAWBBYYMBQKIK-UHFFFAOYSA-N 4-[[3,5-bis[(3,5-ditert-butyl-4-hydroxyphenyl)methyl]-2,4,6-trimethylphenyl]methyl]-2,6-ditert-butylphenol Chemical compound CC1=C(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)C(C)=C(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)C(C)=C1CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 VSAWBBYYMBQKIK-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000005543 nano-size silicon particle Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 208000034301 polycystic dysgenetic disease of parotid salivary glands Diseases 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000011208 reinforced composite material Substances 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- AYEKOFBPNLCAJY-UHFFFAOYSA-O thiamine pyrophosphate Chemical compound CC1=C(CCOP(O)(=O)OP(O)(O)=O)SC=[N+]1CC1=CN=C(C)N=C1N AYEKOFBPNLCAJY-UHFFFAOYSA-O 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention discloses a nylon 66 toughened heat insulation strip, which comprises the following raw materials in parts by weight: 100 parts of nylon 66, 1-3 parts of polybutadiene grafted maleic anhydride, 0.1-1 part of polytetrafluoroethylene, 5-15 parts of glass fiber, 1-5 parts of alanine, 1-10 parts of tetraethoxysilane, 4-10 parts of sodium silicate, 1-2 parts of antioxidant, 0.1-2 parts of black masterbatch and 1-2 parts of lubricant. The invention also discloses a preparation method of the nylon 66 toughened heat insulation strip. The invention has excellent mechanical property, can still keep the excellent performance when the temperature difference is large, has good dimensional stability, can be permanently and tightly combined with the aluminum material in a high-temperature environment, has simple process, can reduce energy consumption and saves cost.
Description
Technical Field
The invention relates to the technical field of heat insulation strips, in particular to a nylon 66 toughened heat insulation strip and a preparation method thereof.
Background
Along with the improvement of the living standard and the improvement of living environment, the requirements on high heat preservation and energy conservation in severe cold areas are continuously improved, and the requirements on doors, windows and curtain walls of buildings are also continuously improved. The aluminum alloy heat-insulating energy-saving doors, windows or curtain walls are increasingly adopted on buildings, so that the structural rigidity of the aluminum alloy energy-saving doors, windows or curtain walls can meet the requirement, the aluminum alloy energy-saving doors, windows or curtain walls are light and attractive, the functions of inner and outer double colors and the like can be realized, and corresponding accessories are convenient to install.
In the existing aluminum alloy energy-saving door and window and curtain wall structures, heat insulation strip structures are used. The heat insulating strip is a nonmetallic connecting piece for connecting the inner aluminum alloy section bar and the outer aluminum alloy section bar in the aluminum alloy heat insulating energy-saving door and window, is a structural member with a mechanical effect in the heat insulating aluminum alloy door and window, and is a functional piece for isolating heat transfer on the aluminum alloy door and window frame.
The aluminum alloy bridge cut-off window heat insulation strip in China is made of glass fiber reinforced composite materials such as nylon 66, PVC, ABS and the like, wherein polar amide groups (-CONH-) in nylon 66 (nylon 66) molecules and active carboxyl groups (-COOH) and amino groups (-NH) at two ends 2 ) The structure makes it have higher melting point (250-260 ℃) and higher mechanical property, and nylon 66 has certain advantages in hydrolysis resistance, high temperature resistance and strength.
However, polar groups in nylon 66 molecules are easy to absorb water and deform, and the dimensional stability of the product is affected, so that inorganic fillers such as glass fibers or graphite are added for modification in practical application, the cost of the composite material can be reduced, the mechanical property of the composite material can be improved, the strength of the composite material is generally from reinforcing fibers, and the interfacial bonding property of the composite material plays an important role in playing an important role in the overall performance of the composite material, and even plays a decisive role.
At present, due to the poor interface bonding strength between the glass fiber and nylon 66, under the action of certain external stress, the deformation of the glass fiber is increased along with the increase of temperature, the stability is poor, and the tensile strength and the impact strength of the glass fiber are all defective to a certain extent, so that the service life of the nylon heat insulation strip in an outdoor environment is not long, and the loss is easy to cause.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a nylon 66 toughened heat insulation strip which comprises the following raw materials in parts by weight:
preferably, the polybutadiene grafted maleic anhydride has a number average molecular weight of 2000-4000 and a maleic anhydride grafting ratio of 3.5-4.6%.
Preferably, the antioxidant is a hindered phenolic or phosphite antioxidant.
Further preferably, the hindered phenol antioxidant is at least one of antioxidant 2246, antioxidant 425, antioxidant 2246-S, antioxidant 330, antioxidant 3224 and antioxidant 3125.
Further preferably, the phosphite antioxidant is at least one of antioxidant TPP, antioxidant DPOP, antioxidant PDOP, antioxidant PDDP, antioxidant AO1608, antioxidant AO1610, antioxidant AO1612, antioxidant AO1613 and antioxidant AO 1600.
Preferably, the lubricant is at least one of ethylene bis stearamide, calcium stearate and zinc stearate.
A preparation method of the nylon 66 toughened heat insulation strip comprises the following steps:
s1, adding dried nylon 66, polybutadiene grafted maleic anhydride, polytetrafluoroethylene, an antioxidant, a black matrix and a lubricant into a high-speed mixer, and stirring at a speed of 1000-5000r/min to obtain a premix;
s2, alternately washing the glass fiber with water and absolute ethyl alcohol, drying, adding the glass fiber into a gamma-ray irradiation furnace for irradiation treatment, ultrasonically washing the glass fiber with absolute ethyl alcohol, drying, mixing the glass fiber with alanine and water, ultrasonically treating the glass fiber, dropwise adding tetraethoxysilane into the glass fiber in the stirring process, stirring the glass fiber at 50-70 ℃, adding water, stirring the glass fiber, adding sodium silicate, continuously stirring the glass fiber, dropwise adding sulfuric acid solution into the glass fiber in a stirring state until the pH of the system is neutral, standing, filtering, washing, and roasting the glass fiber at 400-460 ℃ to obtain activated glass fiber;
s3, adding the premix into a main feeding port of a double-screw extruder, adding activated glass fibers from a side feeding port, and performing melt extrusion granulation to obtain granules, wherein the temperature of each screw barrel of the double-screw extruder is 180-250 ℃;
s4, drying the granules, and performing melt extrusion through a single screw extruder, wherein the temperature of each area of the single screw extruder is 220-260 ℃, and shaping through a die to obtain the nylon 66 toughened heat insulation strip.
Preferably, in S1, stirring is performed at a speed of 1000-5000r/min for a period of 1-5min.
Preferably, in S2, the mixture is dried at 100-120 ℃ and then added into a gamma ray irradiation furnace for irradiation treatment.
Preferably, in the step S2, the ultrasonic treatment process is carried out for 10-20min, the ultrasonic power is 300-500W, and the ultrasonic frequency is 10-20kHz.
Preferably, in S2, the sulfuric acid solution has a mass fraction of 20-40%.
Preferably, in S2, the firing is carried out at a temperature of 400-460℃for a firing time of 5-15min.
Preferably, in S2, the glass fiber is passed at a speed of 1-10cm/min during the irradiation treatment, and the gamma ray irradiation oven generates a gamma ray beam having an energy of 80eV.
Preferably, in S2, alanine and water are mixed, wherein the mass ratio of the alanine to the water is 1-5:20-40.
Preferably, ethyl orthosilicate is dropwise added in the stirring process, stirring is carried out at the temperature of 50-70 ℃, and water is added, wherein the mass ratio of the ethyl orthosilicate to the water is 1-10:50-100.
Preferably, in S3, wherein the twin screw extruder has a screw diameter of 60mm and an aspect ratio L/D of 40.
The technical effects of the invention are as follows:
compared with a chemical method, the method provided by the invention has the advantages that the glass fiber is etched by gamma rays, only the surface damage of the fiber is involved, the structure and the performance of the glass fiber are maintained to the greatest extent, the silicon dioxide crystal seeds are deposited on the surface of the glass fiber under the action of alanine, after dilution, the crystal seeds deposited on the surface of the glass fiber are used as cores to grow nano silicon dioxide, nylon 66 is fused and added into activated glass fiber in a matching way, the surface of the activated glass fiber is rough, and meanwhile, a large number of hydroxyl groups are formed on the surface of the activated glass fiber and can be combined with active carboxyl groups on the surface of the nylon 66, so that the bonding strength between the glass fiber and the nylon 66 is increased, and the tensile strength and the impact strength of a product can be further improved under the condition that the strength of the glass fiber is not influenced.
According to the invention, polytetrafluoroethylene is added, the compatibility of the heat insulation strip with nylon 66 is effectively improved under the action of polybutadiene grafted maleic anhydride, meanwhile, activated glass fibers are combined with nylon 66, and chain entanglement is carried out on the heat insulation strip and the polytetrafluoroethylene under the action of polybutadiene grafted maleic anhydride.
When the temperature difference is large, the invention can still keep the excellent performance, the dimensional stability is very good, the obtained heat insulation strip can be permanently and tightly combined with the aluminum material in a high-temperature environment, and meanwhile, the process is simple, the energy consumption can be reduced, and the cost is saved.
Detailed Description
The invention is further illustrated below in connection with specific embodiments.
Example 1
A preparation method of a nylon 66 toughened heat insulation strip comprises the following steps:
s1, weighing 100kg of dried nylon 66, 1kg of polybutadiene grafted maleic anhydride, 0.1kg of polytetrafluoroethylene, 1kg of antioxidant 2246, 0.1kg of black matrix and 1kg of lubricant, adding into a high-speed mixer, and stirring at a speed of 1000r/min for 1min to obtain a premix;
s2, alternately washing 5kg of glass fiber with water and absolute ethyl alcohol, drying at 100 ℃, adding into a gamma-ray irradiation furnace, passing at a speed of 1cm/min, generating gamma-ray beams with energy of 80eV by the gamma-ray irradiation furnace, ultrasonically washing with absolute ethyl alcohol, drying, mixing with 1kg of alanine and 20kg of water, ultrasonically treating for 10min, ultrasonically treating with ultrasonic power of 300W and ultrasonic frequency of 10kHz, dropwise adding 1kg of ethyl orthosilicate into the mixture at a stirring speed of 1000r/min, stirring for 10h at 50 ℃, adding 50kg of water, stirring for 5min, adding 4kg of sodium silicate, continuously stirring for 10min, dropwise adding sulfuric acid solution with concentration of 20wt% into the mixture until the pH of the system is neutral, standing for 10h, filtering, washing, and roasting at 400 ℃ for 5min to obtain activated glass fiber;
s3, adding the premix into a main feeding port of a double-screw extruder, wherein the screw diameter of the double-screw extruder is 60mm, the length-diameter ratio is L/D is 40, adding activated glass fibers from a side feeding port, and performing melt extrusion granulation to obtain granules, wherein the temperature of each screw barrel of the double-screw extruder is 180 ℃;
s4, drying the granules, and performing melt extrusion through a single-screw extruder, wherein the temperature of each area of the single-screw extruder is 220 ℃, and shaping through a die to obtain the nylon 66 toughened heat insulation strip.
Example 2
A preparation method of a nylon 66 toughened heat insulation strip comprises the following steps:
s1, weighing 100kg of dried nylon 66, 3kg of polybutadiene grafted maleic anhydride, 1kg of polytetrafluoroethylene, 2kg of antioxidant 2246, 2kg of black masterbatch and 2kg of calcium stearate, adding into a high-speed mixer, and stirring at a speed of 5000r/min for 5min to obtain a premix;
s2, alternately washing 15kg of glass fiber with water and absolute ethyl alcohol, drying at 120 ℃, adding the glass fiber into a gamma-ray irradiation furnace, passing the gamma-ray irradiation furnace at a speed of 10cm/min, generating gamma-ray beams with energy of 80eV by using absolute ethyl alcohol, ultrasonically washing the glass fiber, drying the glass fiber, mixing the glass fiber with 5kg of alanine and 40kg of water, ultrasonically treating the glass fiber for 20min, ultrasonically treating the glass fiber with ultrasonic power of 500W at 20kHz, dropwise adding 10kg of ethyl orthosilicate into the glass fiber at a stirring speed of 5000r/min, stirring the glass fiber for 20h at 70 ℃, adding 100kg of water, stirring the glass fiber for 15min, adding 10kg of sodium silicate, continuously stirring the glass fiber for 20min, dropwise adding sulfuric acid solution with a concentration of 40wt% into the glass fiber until the pH of the glass fiber is neutral, standing for 20h, filtering, washing, and roasting the glass fiber at a temperature of 460 ℃ for 15min to obtain activated glass fiber;
s3, adding the premix into a main feeding port of a double-screw extruder, wherein the screw diameter of the double-screw extruder is 60mm, the length-diameter ratio is L/D is 40, adding activated glass fibers from a side feeding port, and performing melt extrusion granulation to obtain granules, wherein the temperature of each screw barrel of the double-screw extruder is 250 ℃;
s4, drying the granules, and performing melt extrusion through a single-screw extruder, wherein the temperature of each area of the single-screw extruder is 260 ℃, and shaping through a die to obtain the nylon 66 toughened heat insulation strip.
Example 3
A preparation method of a nylon 66 toughened heat insulation strip comprises the following steps:
s1, weighing 100kg of dried nylon 66, 1.2kg of polybutadiene grafted maleic anhydride, 0.5kg of polytetrafluoroethylene, 1.2kg of antioxidant 425, 0.5kg of black masterbatch and 1.2kg of calcium stearate, adding into a high-speed mixer, and stirring at a speed of 2000r/min for 2min to obtain a premix; the number average molecular weight of the polybutadiene grafted maleic anhydride is 3000, and the grafting rate of the maleic anhydride is 3.5%;
s2, 8kg of glass fiber is alternately washed by water and absolute ethyl alcohol, dried at the temperature of 105 ℃, added into a gamma ray irradiation furnace, passed through the gamma ray irradiation furnace at the speed of 4cm/min, and produced into gamma ray beams with the energy of 80eV, washed by absolute ethyl alcohol ultrasonic, dried, mixed with 2kg of alanine and 25kg of water, subjected to ultrasonic treatment for 12min, the ultrasonic power of 350W and the ultrasonic frequency of 14kHz, dropwise added with 4kg of ethyl orthosilicate at the stirring speed of 2000r/min, stirred for 12h at the temperature of 55 ℃, added with 50kg of water, continuously stirred for 15min, dropwise added with 25wt% sulfuric acid solution until the pH of the system is neutral in the stirring state, and subjected to standing for 12h, filtering and washing, and baked for 6min at the temperature of 420 ℃ to obtain activated glass fiber;
s3, adding the premix into a main feeding port of a double-screw extruder, wherein the screw diameter of the double-screw extruder is 60mm, the length-diameter ratio is L/D is 40, adding activated glass fibers from a side feeding port, and performing melt extrusion granulation to obtain granules, wherein the temperature of each screw barrel of the double-screw extruder is 190 ℃;
s4, drying the granules, and performing melt extrusion through a single screw extruder, wherein the temperature of each area of the single screw extruder is 230 ℃, and shaping through a die to obtain the nylon 66 toughened heat insulation strip.
Example 4
A preparation method of a nylon 66 toughened heat insulation strip comprises the following steps:
s1, weighing 100kg of dried nylon 66, 2.4kg of polybutadiene grafted maleic anhydride, 0.9kg of polytetrafluoroethylene, 1.5kg of antioxidant 425, 1.5kg of black masterbatch and 1.8kg of ethylene bis stearamide, adding into a high-speed mixer, and stirring at 4000r/min for 4min to obtain a premix; the number average molecular weight of the polybutadiene grafted maleic anhydride is 2500, and the grafting rate of the maleic anhydride is 3.8%;
s2, alternately washing 12kg of glass fiber with water and absolute ethyl alcohol, drying at 115 ℃, adding the glass fiber into a gamma-ray irradiation furnace, passing the gamma-ray irradiation furnace at a speed of 8cm/min, generating gamma-ray beams with energy of 80eV by using absolute ethyl alcohol, ultrasonically washing the glass fiber, drying the glass fiber, mixing the glass fiber with 4kg of alanine and 32kg of water, ultrasonically treating the glass fiber for 15min, ultrasonically treating the glass fiber with ultrasonic power of 450W at an ultrasonic frequency of 18kHz, dropwise adding 8kg of ethyl orthosilicate into the glass fiber at a stirring speed of 4000r/min, stirring the glass fiber for 18h at 66 ℃, adding 80kg of water for 12min, adding 8kg of sodium silicate, continuously stirring the glass fiber for 18min, dropwise adding 35wt% sulfuric acid solution into the glass fiber until the pH of the system is neutral, standing for 15h, filtering, washing, and roasting the glass fiber at a temperature of 450 ℃ for 12min to obtain activated glass fiber;
s3, adding the premix into a main feeding port of a double-screw extruder, wherein the screw diameter of the double-screw extruder is 60mm, the length-diameter ratio is L/D is 40, adding activated glass fibers from a side feeding port, and performing melt extrusion granulation to obtain granules, wherein the temperature of each screw barrel of the double-screw extruder is 240 ℃;
s4, drying the granules, and performing melt extrusion through a single-screw extruder, wherein the temperature of each area of the single-screw extruder is 250 ℃, and shaping through a die to obtain the nylon 66 toughened heat insulation strip.
Example 5
A preparation method of a nylon 66 toughened heat insulation strip comprises the following steps:
s1, weighing 100kg of dried nylon 66, 2kg of polybutadiene grafted maleic anhydride, 0.5kg of polytetrafluoroethylene, 1.5kg of antioxidant 425, 1kg of black masterbatch and 1.5kg of ethylene bis stearamide, adding into a high-speed mixer, and stirring at a speed of 2500r/min for 2min to obtain a premix;
the number average molecular weight of polybutadiene grafted maleic anhydride is 4000, and the grafting rate of maleic anhydride is 4.2%;
s2, alternately washing 12kg of glass fiber with water and absolute ethyl alcohol for 2 times, drying at 115 ℃ and then adding the glass fiber into a gamma-ray irradiation furnace, passing the glass fiber at a speed of 5cm/min, generating gamma-ray beams with energy of 80eV by the gamma-ray irradiation furnace, ultrasonically washing the glass fiber with absolute ethyl alcohol, drying, mixing the glass fiber with 3kg of alanine and 30kg of water, ultrasonically treating the glass fiber for 15min, dropwise adding 5kg of ethyl orthosilicate into the glass fiber at an ultrasonic frequency of 15kHz at a stirring speed of 3000r/min, stirring the glass fiber at a temperature of 60 ℃ for 15h, adding 80kg of water for 10min, adding 6kg of sodium silicate for continuously stirring for 15min, dropwise adding 25wt% sulfuric acid solution into the glass fiber until the pH of the system is neutral in a stirring state, standing for 12h, filtering and washing, and roasting the glass fiber at a temperature of 420 ℃ for 10min to obtain activated glass fiber;
s3, adding the premix into a main feeding port of a double-screw extruder, wherein the screw diameter of the double-screw extruder is 60mm, the length-diameter ratio is L/D is 40, adding activated glass fibers from a side feeding port, and performing melt extrusion granulation to obtain granules, wherein the temperature of each screw barrel of the double-screw extruder is 210 ℃;
s4, drying the granules, and performing melt extrusion through a single screw extruder, wherein the temperature of each area of the single screw extruder is 240 ℃, and shaping through a die to obtain the nylon 66 toughened heat insulation strip.
Comparative example 1
PA66 fiber-added section bars available from Michaelis Plastic products limited in Shenzhen.
Comparative example 2
The preparation method of the nylon 66 heat insulation strip comprises the following steps:
s1, weighing 100kg of dried nylon 66, 2kg of polybutadiene grafted maleic anhydride, 0.5kg of polytetrafluoroethylene, 1.5kg of antioxidant 425, 1kg of black masterbatch and 1.5kg of ethylene bis stearamide, adding into a high-speed mixer, and stirring at a speed of 2500r/min for 2min to obtain a premix;
the number average molecular weight of polybutadiene grafted maleic anhydride is 4000, and the grafting rate of maleic anhydride is 4.2%;
s2, mixing 12kg of glass fiber, 3kg of alanine and 30kg of water, carrying out ultrasonic treatment for 15min, wherein the ultrasonic power is 400W, the ultrasonic frequency is 15kHz, dropwise adding 5kg of ethyl orthosilicate into the mixture at a stirring speed of 3000r/min, stirring for 15h at a temperature of 60 ℃, adding 80kg of water, stirring for 10min, adding 6kg of sodium silicate, continuously stirring for 15min, dropwise adding 25wt% sulfuric acid solution into the mixture until the pH of the system is neutral, standing for 12h, filtering, washing, and roasting at a temperature of 420 ℃ for 10min to obtain pretreated glass fiber;
s3, adding the premix into a main feeding port of a double-screw extruder, wherein the screw diameter of the double-screw extruder is 60mm, the length-diameter ratio is L/D is 40, adding the pretreated glass fiber from a side feeding port, and performing melt extrusion granulation to obtain granules, wherein the temperature of each screw barrel of the double-screw extruder is 210 ℃;
s4, drying the granules, and performing melt extrusion through a single-screw extruder, wherein the temperature of each area of the single-screw extruder is 240 ℃, and shaping through a die to obtain the nylon 66 heat insulation strip.
1. Mechanical Strength test
The sample bars of example 5 and comparative examples 1-2 were baked in a common oven at 140.+ -. 2 ℃ for 6 hours and taken out, and then placed in a dryer at 23.+ -. 2 ℃ for cooling for 2 hours to test performance, and the specific test method is as follows:
testing the transverse tensile strength of the heat insulation strip; tested according to GB/T23615.1-2009 standard;
flexural strength: the speed is 2mm/min according to ISO178 test;
notched Izod impact Strength: type a notch according to ISO180 test;
the test results are shown in the following table:
from the above table, compared with comparative example 2, example 5 can effectively improve the appearance of the product, because activated glass fibers are more uniformly dispersed in the system, the resistance of the activated glass fibers passing through a die in the material extrusion process is small, the stability of the extrusion process can be effectively improved, so that appearance defects are reduced, and meanwhile, compared with comparative examples 1-2, example 5 has higher transverse tensile strength, flexural modulus and cantilever beam notch impact, and is excellent in mechanical properties.
2. Thermal stability test
Linear expansion coefficient: according to GB/T23615.1-2009 standard test, the test instrument is a GW-1500 linear expansion coefficient measuring instrument of Beijing bridge electronic technology limited company;
load (0.45 MPa) deformation temperature: according to GB/T23615.1-2009 standard test, the testing instrument is a thermal deformation tester manufactured by Japanese An Tian precision machine;
the test results are shown in the following table:
| test item | Example 5 | Comparative example 1 | Comparative example 2 |
| Load deformation temperature/DEGC | 251 | 242 | 235 |
| Coefficient of linear expansion/10 9 K 1 | 3.0 | 3.2 | 3.5 |
As shown in the table, the heat insulation strip obtained in the embodiment 5 of the invention has the load deformation temperature and the linear expansion coefficient exceeding the indexes specified by the standards, can meet the use requirements of aluminum alloy building profiles, has the linear expansion coefficient smaller than that of the heat insulation strip in the comparative examples 1-2 and is closer to the aluminum profiles, and has the advantages of high load deformation temperature and good heat resistance stability.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (9)
1. The nylon 66 toughened heat insulation strip is characterized by comprising the following raw materials in parts by weight:
100 parts of nylon 66
1-3 parts of polybutadiene grafted maleic anhydride
0.1 to 1 part of polytetrafluoroethylene
5-15 parts of glass fiber
Alanine 1-5 parts
1-10 parts of tetraethoxysilane
4-10 parts of sodium silicate
Antioxidant 1-2 parts
Black masterbatch 0.1-2 parts
1-2 parts of a lubricant;
the preparation method comprises the following steps:
s1, mixing dried nylon 66, polybutadiene grafted maleic anhydride, polytetrafluoroethylene, an antioxidant, a black matrix and a lubricant to obtain a premix;
s2, alternately washing the glass fiber with water and absolute ethyl alcohol, drying, performing gamma-ray irradiation treatment, performing ultrasonic washing with absolute ethyl alcohol, drying, mixing with alanine and water, performing ultrasonic treatment, dropwise adding tetraethoxysilane into the glass fiber in the stirring process, stirring at 50-70 ℃, adding water, stirring, adding sodium silicate, continuously stirring, dropwise adding sulfuric acid solution into the glass fiber in the stirring state until the pH of the system is neutral, standing, filtering, washing, and roasting at 400-460 ℃ to obtain the activated glass fiber;
in the irradiation treatment process, the glass fiber passes through at a speed of 1-10cm/min, and the gamma-ray irradiation energy is 80eV;
s3, adding the premix into a main feeding port of a double-screw extruder, adding activated glass fibers from a side feeding port, and performing melt extrusion granulation to obtain granules, wherein the temperature of each screw barrel of the double-screw extruder is 180-250 ℃;
s4, drying the granules, and performing melt extrusion through a single screw extruder, wherein the temperature of each area of the single screw extruder is 220-260 ℃, and shaping through a die to obtain the nylon 66 toughened heat insulation strip.
2. The nylon 66 toughened heat insulating strip as in claim 1, wherein the polybutadiene grafted maleic anhydride has a number average molecular weight of 2000 to 4000 and a maleic anhydride grafting ratio of 3.5 to 4.6%.
3. The nylon 66 toughened heat insulation tape of claim 1, wherein the antioxidant is a hindered phenolic or phosphite antioxidant.
4. The nylon 66 toughened heat insulation tape of claim 1, wherein the lubricant is at least one of ethylene bis stearamide, calcium stearate, zinc stearate.
5. A method of making a nylon 66 toughened thermal insulation tape as described in any of claims 1 to 4 comprising the steps of:
s1, mixing dried nylon 66, polybutadiene grafted maleic anhydride, polytetrafluoroethylene, an antioxidant, a black matrix and a lubricant to obtain a premix;
s2, alternately washing the glass fiber with water and absolute ethyl alcohol, drying, performing gamma-ray irradiation treatment, performing ultrasonic washing with absolute ethyl alcohol, drying, mixing with alanine and water, performing ultrasonic treatment, dropwise adding tetraethoxysilane into the glass fiber in the stirring process, stirring at 50-70 ℃, adding water, stirring, adding sodium silicate, continuously stirring, dropwise adding sulfuric acid solution into the glass fiber in the stirring state until the pH of the system is neutral, standing, filtering, washing, and roasting at 400-460 ℃ to obtain the activated glass fiber;
s3, adding the premix into a main feeding port of a double-screw extruder, adding activated glass fibers from a side feeding port, and performing melt extrusion granulation to obtain granules, wherein the temperature of each screw barrel of the double-screw extruder is 180-250 ℃;
s4, drying the granules, and performing melt extrusion through a single screw extruder, wherein the temperature of each area of the single screw extruder is 220-260 ℃, and shaping through a die to obtain the nylon 66 toughened heat insulation strip.
6. The method for producing a nylon 66 toughened heat insulation tape as described in claim 5, wherein in S2, the glass fiber is passed at a speed of 1-10cm/min during the irradiation treatment, and the gamma ray irradiation energy is 80eV.
7. The method for preparing the nylon 66 toughened heat insulation strip according to claim 5, wherein in the S2, the heat insulation strip is mixed with alanine and water, wherein the mass ratio of the alanine to the water is 1-5:20-40.
8. The method for preparing the nylon 66 toughened heat insulation strip according to claim 5, wherein in the step S2, ethyl orthosilicate is added dropwise during stirring, stirring is carried out at 50-70 ℃, water is added, and the mass ratio of the ethyl orthosilicate to the water is 1-10:50-100.
9. The method of producing a nylon 66 toughened heat insulation tape as described in claim 5 wherein in S3, the twin screw extruder screw diameter is 60mm and the aspect ratio is L/D40.
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| CN106987122A (en) * | 2017-05-19 | 2017-07-28 | 金陵科技学院 | A kind of hydrolysis short glass fiber reinforced PA66 and preparation method thereof |
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| CN113717520A (en) * | 2021-09-03 | 2021-11-30 | 广东博事达新材料有限公司 | Glass fiber reinforced nylon 66 composite material for high-gloss heat insulation strip |
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| WO2013133421A1 (en) * | 2012-03-09 | 2013-09-12 | 帝人株式会社 | Carbon fiber bundle and process for producing same |
| CN105524456A (en) * | 2014-10-22 | 2016-04-27 | 中国石油化工股份有限公司 | Glass fiber reinforced nylon heat insulating strip used for aluminum alloy doors and windows as well as preparation method thereof |
| CN106189218A (en) * | 2016-07-18 | 2016-12-07 | 天津金发新材料有限公司 | PA66 compositions of the glass fiber reinforcement that heat insulating strip is special and preparation method thereof |
| CN106987122A (en) * | 2017-05-19 | 2017-07-28 | 金陵科技学院 | A kind of hydrolysis short glass fiber reinforced PA66 and preparation method thereof |
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