CN114685984A - High-rigidity and high-toughness blended nylon material and preparation method thereof - Google Patents
High-rigidity and high-toughness blended nylon material and preparation method thereof Download PDFInfo
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- 239000004677 Nylon Substances 0.000 title claims abstract description 66
- 229920001778 nylon Polymers 0.000 title claims abstract description 66
- 239000000463 material Substances 0.000 title claims abstract description 60
- 238000002360 preparation method Methods 0.000 title claims description 13
- 239000003607 modifier Substances 0.000 claims abstract description 35
- 239000011521 glass Substances 0.000 claims abstract description 30
- 238000004132 cross linking Methods 0.000 claims abstract description 29
- 239000000945 filler Substances 0.000 claims abstract description 27
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 23
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 14
- 229920002302 Nylon 6,6 Polymers 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 31
- 239000002245 particle Substances 0.000 claims description 19
- 238000001035 drying Methods 0.000 claims description 15
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 14
- 229920001971 elastomer Polymers 0.000 claims description 14
- 239000000806 elastomer Substances 0.000 claims description 13
- 229920001910 maleic anhydride grafted polyolefin Polymers 0.000 claims description 13
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 229920002943 EPDM rubber Polymers 0.000 claims description 11
- -1 alkyl phenolic resin Chemical compound 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 10
- 229920001568 phenolic resin Polymers 0.000 claims description 10
- 239000005011 phenolic resin Substances 0.000 claims description 10
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 9
- 229910021426 porous silicon Inorganic materials 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 8
- 239000003963 antioxidant agent Substances 0.000 claims description 8
- 239000003365 glass fiber Substances 0.000 claims description 8
- ZQMHJBXHRFJKOT-UHFFFAOYSA-N methyl 2-[(1-methoxy-2-methyl-1-oxopropan-2-yl)diazenyl]-2-methylpropanoate Chemical compound COC(=O)C(C)(C)N=NC(C)(C)C(=O)OC ZQMHJBXHRFJKOT-UHFFFAOYSA-N 0.000 claims description 8
- 239000004209 oxidized polyethylene wax Substances 0.000 claims description 7
- 235000013873 oxidized polyethylene wax Nutrition 0.000 claims description 7
- 229920006217 cellulose acetate butyrate Polymers 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 238000001291 vacuum drying Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 238000007127 saponification reaction Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 125000004185 ester group Chemical group 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 230000001976 improved effect Effects 0.000 abstract description 8
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000002425 crystallisation Methods 0.000 abstract 1
- 230000008025 crystallization Effects 0.000 abstract 1
- 239000000047 product Substances 0.000 description 9
- 239000001257 hydrogen Substances 0.000 description 7
- 229910052739 hydrogen Inorganic materials 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 238000003756 stirring Methods 0.000 description 6
- 229920006351 engineering plastic Polymers 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 239000002861 polymer material Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002464 physical blending Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical class [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000012745 toughening agent Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- 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
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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)
Abstract
The invention discloses a high-rigidity and high-toughness blended nylon material which is prepared from the following raw materials in parts by weight: nylon 6640-55 parts, glass chopped strands 25-45 parts, system crosslinking reinforcing modified filler 5-15 parts, toughening modifier 3-10 parts, and other auxiliary agents 0.5-2 parts. The blended nylon material takes the nylon 66 and the glass chopped strands as main materials, and the nylon is reinforced by the glass chopped strands, so that the mechanical strength and the dimensional stability of the blended material are improved; the nylon 66 is crosslinked by the system crosslinking reinforced modified filler, so that the inter-molecular-chain spacing is reduced, the compactness among the molecular chains is improved, and the water absorption is reduced; the dimensional stability of the blending material is further improved; the toughening modifier is combined with the system crosslinking reinforcing modified filler, so that the strength and the crystallinity of a molecular crystallization area are maintained, the gaps and the activity of molecular chains in an amorphous area are greatly reduced, the strength of the material is improved, the internal structure of the material is more compact, and the material is more wear-resistant.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a high-rigidity and high-toughness blended nylon material and a preparation method thereof.
Background
The nylon material is a high polymer material with good mechanical property, abrasion resistance, chemical resistance and self-lubricating property, and the prepared nylon engineering plastic can replace metal to a certain extent so as to meet the requirements of light weight and cost reduction of downstream industrial products, and is widely applied to industries such as automobiles, buildings, electronics and electrics, office equipment, machinery and the like. The nylon engineering plastic has such excellent properties that the nylon engineering plastic becomes the most growing material in the plastic industry, and the development of the nylon engineering plastic not only can play a supporting role in the national pillar industry and the modern high and new technology industry, but also has the role of promoting the transformation and upgrade of the traditional industry and the adjustment of the product structure.
The existing nylon materials such as PA66 and other thermoplastic plastic materials have high mechanical energy and certain heat resistance, but because the materials contain a large number of hydrogen bond structures, the materials have high water absorption, poor dimensional stability and relatively poor creep resistance, so that the direct application of the nylon materials in many engineering fields is severely limited. Generally, the means adopted by those skilled in the art to solve the problem is to perform simple physical blending modification on nylon to improve various properties of nylon materials, but the properties of the nylon materials obtained by the simple physical blending modification have large differences, and especially hydrogen bond structures in amorphous regions in molecular structures are loose, so that the water absorption rate is high in the actual use process, and the mechanical properties are obviously reduced in the actual use process; meanwhile, dimensional stability is poor.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a high-rigidity and high-toughness blended nylon material, and simultaneously provides a preparation method of the high-rigidity and high-toughness blended nylon material.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a high-rigidity and high-toughness blended nylon material is composed of nylon 66, glass fiber chopped strands, a system crosslinking reinforcing modified filler, a toughening modifier and other auxiliaries;
the blended nylon material is prepared from the following raw materials in parts by weight: nylon 6640-55 parts, glass chopped strands 25-45 parts, system crosslinking reinforcing modified filler 5-15 parts, toughening modifier 3-10 parts, and other auxiliary agents 0.5-2 parts.
Furthermore, the length range of the glass chopped strands is 2-4mm, and the diameter range of the glass chopped strands is 8-12 μm.
Furthermore, the system crosslinking reinforcing modified filler is surface coating modified silicon dioxide particles.
Further, the preparation method of the modified silicon dioxide particle comprises the following steps: placing porous silicon dioxide nano powder in absolute ethyl alcohol, adding methyl methacrylate after fully dispersing, adding dimethyl azodiisobutyrate after fully and uniformly mixing again, adding a potassium hydroxide aqueous solution after heating reaction for partial saponification treatment, and changing partial side ester groups into ionic salts; then cleaning, centrifuging, taking the condensate and drying to obtain the product.
Centrifuging, taking the condensate, and drying to obtain the product.
The specific preparation process of the modified silicon dioxide particles comprises the following steps: putting 10 parts by mass of porous silicon dioxide nano powder into 90-110 parts by mass of absolute ethyl alcohol, adding 8-12 parts by mass of methyl methacrylate after fully dispersing, adding 1.5-2.5 parts by mass of dimethyl azodiisobutyrate after fully and uniformly mixing, and reacting for 50-60min at 75-85 ℃; then gradually dripping 10-20 parts by mass of potassium hydroxide aqueous solution with the pH value of about 13-14, stirring, centrifuging, taking out a condensate, and drying to obtain the final product. The obtained modified silica particles are superfine porous silica particles, have the characteristics of small particle size and porous surface, and after organic macromolecular surface coating treatment, macromolecular chains can be uniformly dispersed in a macromolecular nylon material, and potassium ion salts formed by saponification can form physical cross-linking points with hydrogen bonds of nylon; meanwhile, the polar group coated on the surface of the silicon dioxide can be chemically reacted with a surface treating agent of the glass fiber chopped strand and an active group of the alkyl phenolic resin to form a covalent bond, so that a good impact-resistant and stretch-resistant network structure can be obtained. Meanwhile, a local fulcrum is formed at the modified silicon dioxide particle position, so that the structural strength, toughness and ductility of the blended nylon material system are improved; in addition, the modified porous silicon dioxide particles have higher fluidity and can be well dispersed in a blended nylon material system, so that the blended nylon material system has the advantages of more compact and clean surface, smaller friction coefficient and more excellent wear resistance.
Further, the toughening modifier is composed of at least one of a maleic anhydride grafted polyolefin elastomer and a maleic anhydride grafted ethylene propylene diene monomer and an alkyl phenolic resin, and the mass part ratio of the at least one of the maleic anhydride grafted polyolefin elastomer and the maleic anhydride grafted ethylene propylene diene monomer in the toughening modifier is 30-50%.
Further, the other auxiliary agent comprises at least one of oxidized polyethylene wax, cellulose acetate butyrate and hindered phenol antioxidants.
On one hand, the addition of the alkyl phenolic resin is beneficial to the reaction with grafted maleic anhydride to improve the toughening efficiency; on the other hand, the method is favorable for forming a strong hydrogen bond network structure in a nylon material system to reduce the strength reduction caused by the addition of the toughening agent. The alkyl phenolic resin has phenolic hydroxyl groups with certain polarity, and is combined with a large number of amide groups contained in the molecular structure of the polyamide to form hydrogen bonds, so that the glass transition temperature of the PA66 component is increased; in addition, the hydrogen bond network structure is combined with physical cross-linking points formed by ionic salts on the surfaces of the silicon dioxide porous particles, and the interaction force among molecular chains of a blended nylon material system is improved, so that the blended nylon material is uniformly and fully mixed, the internal structure is more compact, and the surface is finer and more clean and wear-resistant.
The invention also provides a preparation method of the high-rigidity and high-toughness blended nylon material, which comprises the following steps:
(1) preparing nylon 66, glass fiber chopped strands, a system crosslinking reinforcing modified filler, a toughening modifier and other auxiliaries according to the weight part ratio;
(2) putting nylon 66 and the system crosslinking reinforcing modified filler into a double-screw extruder for extrusion granulation to obtain primary mixed nylon resin;
(3) and (3) adding glass chopped strands, a toughening modifier and other auxiliaries into the primarily mixed nylon resin obtained in the step (2), placing the mixture into a screw extruder for melting, extruding and granulating, and drying in vacuum to obtain the blended nylon material.
Further, in the step (2), the extrusion temperature is controlled to be 250-; the processing temperature in the extrusion process in the step (3) is controlled to be 260-; the vacuum drying time is controlled to be 7-10h in the vacuum drying process, and the drying temperature is 80-90 ℃.
Compared with the prior art, the invention has the beneficial effects that:
the blended nylon material takes the nylon 66 and the glass chopped strands as main materials, and the nylon is reinforced by the glass chopped strands, so that the mechanical strength and the dimensional stability of the blended material are improved; the blending material system is crosslinked through the system crosslinking reinforced modified filler, so that a local fulcrum effect is provided for the high polymer material during blending, and the dimensional stability of the blending material is further improved; the toughening modifier can form an interpenetrating hydrogen bond network structure in the rubber material in the mixing process, and the toughening modifier is combined with the system crosslinking reinforced modified filler to ensure that the blending material is uniformly and fully mixed, the internal structure is more compact, and the surface is finer and cleaner and is wear-resistant.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Example 1: a high-rigidity and high-toughness blended nylon material is composed of the following raw materials in parts by weight: nylon 6648 parts, glass chopped strands 35 parts, system crosslinking reinforcing modified filler 10 parts, toughening modifier 6 parts, and other auxiliary agent 1 part.
Furthermore, the length range of the glass chopped strands is 2-4mm, and the diameter range of the glass chopped strands is 8-12 μm; the other auxiliary agents comprise oxidized polyethylene wax, cellulose acetate butyrate and hindered phenol antioxidants.
Further, the system crosslinking reinforcing modified filler is modified silicon dioxide particles; the specific preparation process of the modified silicon dioxide particles comprises the following steps: placing 10 parts by mass of porous silicon dioxide nano powder into 100 parts by mass of absolute ethyl alcohol, adding 10 parts by mass of methyl methacrylate after fully dispersing, adding 2 parts by mass of dimethyl azodiisobutyrate after fully and uniformly mixing, and reacting for 55min at 80 ℃; adding 12 parts by mass of a potassium hydroxide solution with a pH value of 14; stirring; centrifuging, taking the condensate, and drying to obtain the product.
Further, the toughening modifier consists of a maleic anhydride grafted polyolefin elastomer, a maleic anhydride grafted ethylene propylene diene monomer and an alkyl phenolic resin, wherein the mass ratio of the maleic anhydride grafted polyolefin elastomer to the maleic anhydride grafted ethylene propylene diene monomer in the toughening modifier is 40%.
Example 2: a high-rigidity and high-toughness blended nylon material is composed of the following raw materials in parts by weight: nylon 6640 parts, glass chopped strands 25 parts, system crosslinking reinforcing modified filler 5 parts, toughening modifier 3 parts, and other auxiliary agent 0.5 part.
Furthermore, the length range of the glass chopped strands is 2-4mm, and the diameter range of the glass chopped strands is 8-12 μm; the other auxiliary agents comprise oxidized polyethylene wax and hindered phenol antioxidants.
Further, the system crosslinking reinforcing modified filler is modified silicon dioxide particles; the specific preparation process of the modified silicon dioxide particles comprises the following steps: placing 10 parts by mass of porous silicon dioxide nano powder into 90 parts by mass of absolute ethyl alcohol, adding 8 parts by mass of methyl methacrylate after fully dispersing, adding 1.5 parts by mass of dimethyl azodiisobutyrate after fully and uniformly mixing, and reacting for 50min at 75 ℃; adding 15 parts by mass of a potassium hydroxide solution with a pH value of 13; stirring; centrifuging, taking the condensate, and drying to obtain the product.
Further, the toughening modifier consists of a maleic anhydride grafted polyolefin elastomer and an alkyl phenolic resin, wherein the mass ratio of the maleic anhydride grafted polyolefin elastomer in the toughening modifier is 30%.
Example 3: a high-rigidity and high-toughness blended nylon material is composed of the following raw materials in parts by weight: nylon 6655 parts, glass chopped strands 45 parts, system crosslinking reinforcing modified filler 15 parts, toughening modifier 10 parts and other auxiliary agents 2 parts.
Furthermore, the length range of the glass chopped strands is 2-4mm, and the diameter range of the glass chopped strands is 8-12 μm; the other auxiliary agents comprise oxidized polyethylene wax, cellulose acetate butyrate and hindered phenol antioxidants.
Further, the system crosslinking reinforcing modified filler is modified silicon dioxide particles; the specific preparation process of the modified silicon dioxide particles comprises the following steps: placing 10 parts by mass of porous silicon dioxide nano powder into 110 parts by mass of absolute ethyl alcohol, adding 12 parts by mass of methyl methacrylate after fully dispersing, adding 2.5 parts by mass of dimethyl azodiisobutyrate after fully and uniformly mixing, and reacting for 60min at 85 ℃; adding 10 parts by mass of a potassium hydroxide solution with a pH value of 14; stirring; centrifuging, taking the condensate, and drying to obtain the product.
Further, the toughening modifier consists of maleic anhydride grafted ethylene propylene diene rubber and alkyl phenolic resin, and the mass ratio of the maleic anhydride grafted ethylene propylene diene rubber in the toughening modifier is 50%.
Example 4: a high-rigidity and high-toughness blended nylon material is composed of the following raw materials in parts by weight: nylon 6645 parts, glass chopped strands 40 parts, system crosslinking reinforcing modified filler 8 parts, toughening modifier 8 parts and other auxiliary agents 0.8 part.
Furthermore, the length range of the glass chopped strands is 2-4mm, and the diameter range of the glass chopped strands is 8-12 mu m; the other auxiliary agent is hindered phenol antioxidant.
Further, the system crosslinking reinforcing modified filler is modified silicon dioxide particles; the specific preparation process of the modified silicon dioxide particles comprises the following steps: placing 10 parts by mass of porous silicon dioxide nano powder into 95 parts by mass of absolute ethyl alcohol, adding 11 parts by mass of methyl methacrylate after fully dispersing, adding 1.8 parts by mass of dimethyl azodiisobutyrate after fully and uniformly mixing, and reacting for 52min at 82 ℃; adding 12 parts by mass of a potassium hydroxide solution with a pH value of 14; stirring; centrifuging, taking the condensate, and drying to obtain the product.
Further, the toughening modifier consists of a maleic anhydride grafted polyolefin elastomer and an alkyl phenolic resin, wherein the mass proportion of the maleic anhydride grafted polyolefin elastomer in the toughening modifier is 35%.
Example 5: a high-rigidity and high-toughness blended nylon material is composed of the following raw materials in parts by weight: nylon 6648 parts, glass chopped strand 35 parts, toughening modifier 6 parts, and other auxiliary agent 1 part.
Furthermore, the length range of the glass chopped strands is 2-4mm, and the diameter range of the glass chopped strands is 8-12 mu m; the other auxiliary agents comprise oxidized polyethylene wax, cellulose acetate butyrate and hindered phenol antioxidants.
Further, the toughening modifier consists of a maleic anhydride grafted polyolefin elastomer, a maleic anhydride grafted ethylene propylene diene monomer and an alkyl phenolic resin, wherein the mass ratio of the maleic anhydride grafted polyolefin elastomer to the maleic anhydride grafted ethylene propylene diene monomer in the toughening modifier is 40%.
Example 6: a high-rigidity and high-toughness blended nylon material is composed of the following raw materials in parts by weight: nylon 6648 parts, glass chopped strands 35 parts, system crosslinking reinforcing modified filler 10 parts, toughening modifier 6 parts, and other auxiliary agent 1 part.
Furthermore, the length range of the glass chopped strands is 2-4mm, and the diameter range of the glass chopped strands is 8-12 μm; the other auxiliary agents comprise oxidized polyethylene wax, cellulose acetate butyrate and hindered phenol antioxidants.
Further, the system crosslinking reinforcing modified filler is modified silicon dioxide particles; the specific preparation process of the modified silicon dioxide particles comprises the following steps: placing 10 parts by mass of porous silicon dioxide nano powder into 100 parts by mass of absolute ethyl alcohol, adding 10 parts by mass of methyl methacrylate after fully dispersing, adding 2 parts by mass of dimethyl azodiisobutyrate after fully and uniformly mixing, and reacting for 55min at 80 ℃; adding 12 parts by mass of a potassium hydroxide solution with a pH value of 14; stirring; centrifuging, taking the condensate, and drying to obtain the product.
Further, the toughening modifier consists of a maleic anhydride grafted polyolefin elastomer and maleic anhydride grafted ethylene propylene diene monomer.
The method of making the high stiffness, high toughness blended nylon material described in examples 1-6 above, comprising the steps of:
(1) preparing nylon 66, glass fiber chopped strands, a system crosslinking reinforcing modified filler, a toughening modifier and other auxiliaries according to the weight part ratio;
(2) putting nylon 66 and the system crosslinking reinforced modified filler into a double-screw extruder for extrusion and granulation to obtain a primary mixed nylon resin; controlling the extrusion temperature to be 250-270 ℃ and the rotating speed of the main screw to be 240-270 r/min during extrusion;
(3) adding glass chopped strands, a toughening modifier and other auxiliaries into the primarily mixed nylon resin obtained in the step (2), placing the mixture into a screw extruder for melting, extruding and granulating, and drying in vacuum to obtain a blended nylon material; the processing temperature is controlled to be 260-280 ℃ and the screw rotating speed is controlled to be 300-330 r/min in the extrusion process; in the vacuum drying process, the vacuum drying time is controlled to be 7-10h, and the drying temperature is 80-90 ℃.
The blended nylon materials obtained in the above examples 1 to 6 were subjected to a performance test, in which a balance parallel test was performed, and the specifications of the experimental materials and the experimental conditions of each example were identical. The tensile strength is tested according to the ASTM-D638 standard, the type of the test sample is type I, the test sample strips of each example have the same size, and the tensile speed is 50 mm/min; the flexural strength was measured in accordance with ASTM-D790, and the specimens tested in the examples were of the same size and had a flexural speed of 2 mm/min; the notch impact strength is tested according to the ASTM-D256 standard, the type of the test sample is a V notch type, the sizes of the test samples in the embodiments are the same, the notch type is a V notch type, and the residual thickness of the notch is 10.16 mm; the heat distortion temperature is tested according to the ASTM-D648 standard, the load is 1.82Mpa, and the test sample of each embodiment has the same size; the surface properties were visually checked, and the injection molding specifications of the examples were the same and were compared and observed. The test results are shown in the following table.
It should be noted that the above mentioned embodiments are only preferred embodiments of the present invention, and it is obvious to those skilled in the art that several modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (8)
1. A high-rigidity high-toughness blended nylon material is characterized in that: the composite material consists of nylon 66, glass fiber chopped strands, a system crosslinking reinforcing modified filler, a toughening modifier and other auxiliary agents;
the blended nylon material is prepared from the following raw materials in parts by weight: nylon 6640-55 parts, glass chopped strands 25-45 parts, system crosslinking reinforcing modified filler 5-15 parts, toughening modifier 3-10 parts, and other auxiliary agents 0.5-2 parts.
2. A high stiffness, high toughness blended nylon material according to claim 1, wherein: the length range of the glass fiber chopped strands is 2-4mm, and the diameter range of the glass fiber chopped strands is 8-12 mu m.
3. A high rigidity, high toughness blended nylon material according to claim 1, characterized in that: the system crosslinking reinforcing modified filler is modified silicon dioxide particles.
4. A high stiffness, high toughness blended nylon material according to claim 3, wherein: the preparation method of the modified silicon dioxide particle comprises the following steps: placing porous silicon dioxide nano powder in absolute ethyl alcohol, adding methyl methacrylate after fully dispersing, adding dimethyl azodiisobutyrate after fully and uniformly mixing again, and heating for reaction; after the reaction, adding an aqueous solution of potassium hydroxide to perform partial saponification treatment, and changing partial side ester groups into ionic salts; then cleaning, centrifuging, taking the condensate and drying to obtain the product.
5. A high stiffness, high toughness blended nylon material according to claim 1, wherein: the toughening modifier consists of at least one of maleic anhydride grafted polyolefin elastomer and maleic anhydride grafted ethylene propylene diene monomer and alkyl phenolic resin, and the mass part of at least one of the maleic anhydride grafted polyolefin elastomer and the maleic anhydride grafted ethylene propylene diene monomer in the toughening modifier is 30-50%.
6. A high stiffness, high toughness blended nylon material according to claim 1, wherein: the other auxiliary agent comprises at least one of oxidized polyethylene wax, cellulose acetate butyrate and hindered phenol antioxidants.
7. A method of preparing a high rigidity, high toughness blended nylon material as claimed in any one of claims 1 to 6, which comprises the steps of:
(1) preparing nylon 66, glass fiber chopped strands, a system crosslinking reinforcing modified filler, a toughening modifier and other auxiliaries according to the weight part ratio;
(2) putting nylon 66 and the system crosslinking reinforcing modified filler into a double-screw extruder for extrusion granulation to obtain primary mixed nylon resin;
(3) and (3) adding glass chopped strands, a toughening modifier and other auxiliaries into the primarily mixed nylon resin obtained in the step (2), placing the mixture into a screw extruder to be melted, extruding and granulating the mixture, and drying the mixture in vacuum to obtain the blended nylon material.
8. The method for preparing high rigidity and high toughness blended nylon material as claimed in claim 7, wherein in the step (2), the extrusion temperature is controlled to be 250-; the processing temperature in the extrusion process in the step (3) is controlled to be 260-280 ℃, and the rotation speed of the screw is controlled to be 300-330 r/min; the vacuum drying time is controlled to be 7-10h in the vacuum drying process, and the drying temperature is 80-90 ℃.
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| CN202210367410.4A CN114685984A (en) | 2022-04-08 | 2022-04-08 | High-rigidity and high-toughness blended nylon material and preparation method thereof |
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| CN202210367410.4A CN114685984A (en) | 2022-04-08 | 2022-04-08 | High-rigidity and high-toughness blended nylon material and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| US20100324188A1 (en) * | 2007-12-28 | 2010-12-23 | Cheil Industries Inc. | Fiber Reinforced Nylon Composition |
| CN101948617A (en) * | 2010-10-08 | 2011-01-19 | 苏州旭光聚合物有限公司 | Glass fiber/mineral composite reinforced modified nylon-6 material and preparation method thereof |
| CN104356640A (en) * | 2014-11-11 | 2015-02-18 | 河北工业大学 | Preparation method of polyacrylate compound particles for nylon 6 low-temperature toughening modification |
| CN111635629A (en) * | 2020-06-30 | 2020-09-08 | 重庆科聚孚工程塑料有限责任公司 | Low-water-absorption glass fiber reinforced halogen-free flame-retardant polyamide material and preparation method thereof |
| CN111978715A (en) * | 2020-08-31 | 2020-11-24 | 东莞市亚仑塑料原料有限公司 | Glass fiber reinforced nylon and preparation method thereof |
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