CN114773805A - Modified PA56 composite material and preparation method thereof - Google Patents
Modified PA56 composite material and preparation method thereof Download PDFInfo
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- CN114773805A CN114773805A CN202210598409.2A CN202210598409A CN114773805A CN 114773805 A CN114773805 A CN 114773805A CN 202210598409 A CN202210598409 A CN 202210598409A CN 114773805 A CN114773805 A CN 114773805A
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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
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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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
- 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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Abstract
The invention discloses a modified PA56 composite material and a preparation method thereof. A modified PA56 composite material comprises the following raw materials in parts by weight: PA 56: 20-80 parts; PET: 20-80 parts; magnesium borate whisker: 5-20 parts of a solvent; a compatilizer: 2-20 parts of a solvent; antioxidant: 0.2-0.8 part; coupling agent: 1-3 parts of lubricant: 0.5-2 parts. The composite material disclosed by the invention is prepared by alloying PA56 and PET, adding some auxiliaries to enable PA56 and PET to be better compatible, adding the magnesium borate whisker to enable PA56/PET alloy to have higher strength and lower water absorption rate, simultaneously adding the compatilizer to enable PA56/PET alloy to have higher toughness, adding other auxiliaries to improve the dimensional stability and ageing resistance of PA56T/PET, and being simple in production process, low in price of raw materials and capable of being used for large-scale production.
Description
Technical Field
The invention relates to a modified PA56 composite material and a preparation method thereof, belonging to the technical field of high polymer materials.
Background
With the reduction of global petroleum energy and the improvement of environmental protection consciousness of people, the development of renewable bio-based polyamide from biomass raw materials becomes a hot spot for research and development of global chemical industry and related industries. The bio-based nylon PA56 is a novel bio-based polyamide synthesized by bio-based pentanediamine and petroleum-based adipic acid. The bio-based pentanediamine can be obtained by effectively utilizing starch microorganisms to convert saccharides, reduces the production cost, relieves the pressure of shortage of petroleum resources, improves the product quality, and is a very competitive nylon material.
PA56 has a similar molecular structure to PA66, a plurality of repeat unit amido bonds exist in a molecular main chain, and the molecular chain ends are carboxyl and amino. PA66 molecular chain presents central symmetry, and the density of hydrogen bonds formed among amide groups of the PA66 molecular chain is higher. And the molecular chain of PA56 is not centrosymmetric, so that the probability of forming hydrogen bonds among amide groups is greatly reduced. Research shows that the crystallization capacity of PA56 is not as good as that of PA66, but the PA56 has a melting point close to that of PA66, and the PA56 and the PA66 have relatively close mechanical properties under the conditions of melting point, density and dry state, so that the PA56 has wide application prospects in chemical industry and related industries.
However, the PA56 has obvious defects in the aspect of engineering plastic application, the water absorption rate and the water absorption rate are both higher than those of PA66, and the dimensional stability is poorer than that of PA 66. Secondly, PA56 has unstable crystallization and poor oxidation resistance, and the performance of the working material can change under a high-temperature environment for a long time. Therefore, the performance defects of high water absorption, low impact strength and the like of the PA56 are improved, so that the PA66 can be partially or completely replaced in the aspects of automobiles, electronic appliances and the like, and the PA56 is widely applied to engineering plastics and has very important significance.
PET has excellent physical and mechanical properties, creep resistance, fatigue resistance, friction resistance, good dimensional stability, small hygroscopicity and excellent electrical insulation in a wide temperature range. Because the ester group is non-polar, the water uptake of PET is low according to similar compatibility principles. In addition, because PET contains a benzene ring group with high rigidity, molecular chain regularity is not high, crystallization rate is slow, and crystallization can be carried out at the temperature of more than 80 ℃.
Magnesium borate whiskers (Mg2B2O5w) have the characteristics of small size and low coefficient of expansion, which hardly affect the melt flowability of the matrix when Mg2B2O5w is added to the polymer matrix as a reinforcing material. Polymer matrix composites, typically reinforced with Mg2B2O5w, are characterized by smooth surfaces, high dimensional accuracy and complex thin-walled shapes.
Aiming at the defects in the prior art, the modified PA56 composite material and the preparation method thereof are provided.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a modified PA56 composite material and a preparation method thereof, PA56 and PET are alloyed, the advantages of the PA56 and the PET are combined, some auxiliary agents are added, the PA56 and the PET are better compatible, the material has low water absorption and excellent mechanical strength, and meanwhile, the material has good dimensional stability and oxidation resistance, and can be used for large-scale production.
The invention is realized by the following technical scheme:
a modified PA56 composite material is characterized by comprising the following raw materials in parts by weight:
the compatilizer is at least one of POE-g-MAH, PP-g-MAH and solid bisphenol A epoxy resin.
The modified PA56 composite material is characterized in that the magnesium borate whiskers are anhydrous.
The antioxidant of the modified PA56 composite material is at least one of antioxidant 1098, antioxidant 168 and antioxidant 1010.
The modified PA56 composite material is characterized in that the coupling agent is at least one of vinyl triethoxysilane, aminopropyl triethoxysilane and glycidyl ether oxygen trimethoxy silane.
The modified PA56 composite material is characterized in that the lubricant is at least one of stearic acid, silicone powder, EBS and polyethylene wax.
The preparation method of the modified PA56 composite material comprises the steps of weighing dried PA56, dried PET, anhydrous magnesium borate whisker, a compatilizer, an antioxidant, a coupling agent and a lubricant, adding the weighed materials into a high-speed mixer, mixing the materials at a low speed for 1.5 minutes, then mixing the materials at a high speed for 2 minutes, and discharging the materials; and feeding the mixed material into a double-screw extruder, and after the material comes out of a die head of the extruder, carrying out traction cooling, blow-drying and grain-sized dicing to obtain the PA56/PET composite material.
According to the preparation method of the modified PA56 composite material, the temperature of each zone of the double-screw extruder is set as follows: the temperature of the first zone is 270-280 ℃, the temperature of the second zone is 275-280 ℃, the temperature of the third zone is 275-280 ℃, the temperature of the fourth zone is 275-280 ℃, the temperature of the fifth zone is 275-280 ℃ and the temperature of the sixth zone is 275-280 ℃; the temperature of the machine head is 275 ℃ and 280 ℃; the rotating speed of the extruder host is 200-.
The invention achieves the following beneficial effects:
the composite material disclosed by the invention alloys PA56 and PET, integrates the respective advantages of the PA56 and PET, adds a plurality of auxiliaries, enables PA56 and PET to be better compatible, enables the PA56/PET alloy to have higher strength and lower water absorption rate due to the added magnesium borate whisker, enables the PA56/PET alloy to have higher toughness due to the added compatilizer, can improve the dimensional stability and aging resistance of the PA56T/PET due to the added other auxiliaries, is simple in production process, low in raw material price, and can be used for large-scale production.
The preparation method provided by the invention is simple to operate, convenient to control, stable in product quality and capable of reducing the production cost, and can be used for large-scale production.
Detailed Description
The invention is further described below. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
A modified PA56 composite material is characterized by comprising the following raw materials in parts by weight:
the compatilizer is POE-g-MAH, the antioxidant is antioxidant 1010, the coupling agent is vinyl triethoxysilane, and the lubricant is stearic acid. The magnesium borate crystal whisker is anhydrous magnesium borate crystal whisker.
The preparation method of the modified PA56 composite material comprises the steps of weighing dried PA56, dried PET, anhydrous magnesium borate whisker, a compatilizer, an antioxidant, a coupling agent and a lubricant, adding the weighed materials into a high-speed mixer, mixing the materials at a low speed for 1.5 minutes, then mixing the materials at a high speed for 2 minutes, and discharging the materials; and feeding the mixed material into a double-screw extruder, and after the material comes out of a die head of the extruder, carrying out traction cooling, blow-drying and grain-sized dicing to obtain the PA56/PET composite material. The temperature of each zone of the double-screw extruder is set as follows: the first zone temperature is 270-280 ℃, the second zone temperature is 275-280 ℃, the third zone temperature is 275-280 ℃, the fourth zone temperature is 275-280 ℃, the fifth zone temperature is 275-280 ℃ and the sixth zone temperature is 275-280 ℃; the temperature of the machine head is 275 ℃ and 280 ℃; the rotating speed of the extruder host is 200-.
Example 2
The modified PA56 composite material is characterized by comprising the following raw materials in parts by weight:
the compatilizer is a POE-g-MAH and PP-g-MAH compound, the antioxidant is antioxidant 1098, the coupling agent is aminopropyltriethoxysilane, and the lubricant is EBS.
The preparation method of the modified PA56 composite material comprises the steps of weighing dried PA56, dried PET, anhydrous magnesium borate whisker, a compatilizer, an antioxidant, a coupling agent and a lubricant, adding the weighed materials into a high-speed mixer, mixing the materials at a low speed for 1.5 minutes, then mixing the materials at a high speed for 2 minutes, and discharging the materials; and feeding the mixed material into a double-screw extruder, and after the material comes out of a die head of the extruder, carrying out traction cooling, blow-drying and grain-sized dicing to obtain the PA56/PET composite material. The temperature of each zone of the double-screw extruder is set as follows: the temperature of the first zone is 270-280 ℃, the temperature of the second zone is 275-280 ℃, the temperature of the third zone is 275-280 ℃, the temperature of the fourth zone is 275-280 ℃, the temperature of the fifth zone is 275-280 ℃ and the temperature of the sixth zone is 275-280 ℃; the temperature of the machine head is 275 ℃ and 280 ℃; the rotation speed of the extruder host is 200-300r/min, and the current of the extruder host is 60-80A.
Example 3
The modified PA56 composite material is characterized by comprising the following raw materials in parts by weight:
the compatilizer is a compound of POE-g-MAH, PP-g-MAH and solid bisphenol A epoxy resin, the antioxidant is a compound of antioxidant 168 and antioxidant 1010, the coupling agent is glycidyl ether oxy trimethoxy silane, and the lubricant is a compound of polyethylene wax and silicone powder.
The preparation method of the modified PA56 composite material comprises the steps of weighing dried PA56, dried PET, anhydrous magnesium borate whisker, a compatilizer, an antioxidant, a coupling agent and a lubricant, adding the weighed materials into a high-speed mixer, mixing the materials at a low speed for 1.5 minutes, then mixing the materials at a high speed for 2 minutes, and discharging the materials; and feeding the mixed material into a double-screw extruder, and after the material comes out of a die head of the extruder, carrying out traction cooling, blow-drying and grain-sized dicing to obtain the PA56/PET composite material. The temperature of each zone of the double-screw extruder is set as follows: the first zone temperature is 270-280 ℃, the second zone temperature is 275-280 ℃, the third zone temperature is 275-280 ℃, the fourth zone temperature is 275-280 ℃, the fifth zone temperature is 275-280 ℃ and the sixth zone temperature is 275-280 ℃; the temperature of the machine head is 275 ℃ and 280 ℃; the rotating speed of the extruder host is 200-.
Comparative example 1
A modified PA56 composite material is characterized by comprising the following raw materials in parts by weight:
the rest is the same as in example 3.
Comparative example 2
A modified PA56 composite material is characterized by comprising the following raw materials in parts by weight:
the rest is the same as in example 3.
Comparative example 3
PA56。
Performance test of the products obtained in examples 1 to 3 and comparative examples 1 to 3:
the properties of the product were tested and evaluated by the following methods.
(1) And tensile strength: testing according to ASTM D638 standard method;
(2) and bending strength: testing according to ASTM D790 standard method;
(3) flexural modulus: testing according to ASTM D790 standard method;
(4) izod notched impact strength: testing according to ASTM D256 standard method;
(5) water absorption: naturally placing at 23 deg.C, and testing with 50% humidity; the test results are shown in Table 1.
Table 1 results of performance test of each example and comparative example.
As can be seen from Table 1, examples 1, 2 and 3, compared to comparative example 1, added with magnesium borate whiskers, provided PA56/PET alloy with higher strength and lower water absorption.
Compared with the comparative example 2, the PA56/PET alloy has higher toughness due to the addition of the compatilizer in the examples 1, 2 and 3.
Compared with the comparative example 3, the PA56/PET composite materials of the examples 1, 2 and 3 not only have better impact resistance and tensile and bending strength, but also have greatly reduced water absorption rate.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A modified PA56 composite material is characterized by comprising the following raw materials in parts by weight:
2. the modified PA56 composite material of claim 1, wherein the compatilizer is at least one of POE-g-MAH, PP-g-MAH and solid bisphenol A epoxy resin.
3. The modified PA56 composite material of claim 1, wherein the magnesium borate whiskers are anhydrous.
4. The modified PA56 composite material as claimed in claim 1, wherein the antioxidant is at least one of antioxidant 1098, antioxidant 168 and antioxidant 1010.
5. The modified PA56 composite material of claim 4, wherein the coupling agent is at least one of vinyltriethoxysilane, aminopropyltriethoxysilane, and glycidyloxytrimethoxysilane.
6. The modified PA56 composite material of claim 1, wherein the lubricant is at least one of stearic acid, silicone powder, EBS and polyethylene wax.
7. The preparation method of the modified PA56 composite material as claimed in any one of claims 1 to 6, wherein the dried PA56, PET, anhydrous magnesium borate whisker, a compatilizer, an antioxidant, a coupling agent and a lubricant are weighed and added into a high-speed mixer, the mixture is mixed at a low speed for 1.5 minutes and then mixed at a high speed for 2 minutes, and materials are discharged; and feeding the mixed material into a double-screw extruder, and after the material comes out of a die head of the extruder, carrying out traction cooling, blow-drying and grain-sized dicing to obtain the PA56/PET composite material.
8. The process for preparing a modified PA56 composite material according to claim 7, wherein the temperatures of the zones of the twin-screw extruder are set as follows: the first zone temperature is 270-280 ℃, the second zone temperature is 275-280 ℃, the third zone temperature is 275-280 ℃, the fourth zone temperature is 275-280 ℃, the fifth zone temperature is 275-280 ℃ and the sixth zone temperature is 275-280 ℃; the temperature of the machine head is 275 ℃ and 280 ℃; the rotating speed of the extruder host is 200-.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210598409.2A CN114773805A (en) | 2022-05-30 | 2022-05-30 | Modified PA56 composite material and preparation method thereof |
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| CN202210598409.2A CN114773805A (en) | 2022-05-30 | 2022-05-30 | Modified PA56 composite material and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020099117A1 (en) * | 2000-11-30 | 2002-07-25 | Kie-Youn Jeong | Polyamide resin composition |
| CN101045816A (en) * | 2007-03-22 | 2007-10-03 | 辽宁大学 | Preparation process of whisher reinforced nylon composite |
| JP2014055269A (en) * | 2012-09-14 | 2014-03-27 | Toray Ind Inc | Polyamide resin composition |
| CN112391050A (en) * | 2020-12-22 | 2021-02-23 | 华东理工大学 | Low-water-absorption PA56/PBT composite material and preparation method thereof |
| CN114479440A (en) * | 2021-12-14 | 2022-05-13 | 华东理工大学 | Low-water-absorption PA56T/PET composite material and preparation method thereof |
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2022
- 2022-05-30 CN CN202210598409.2A patent/CN114773805A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020099117A1 (en) * | 2000-11-30 | 2002-07-25 | Kie-Youn Jeong | Polyamide resin composition |
| CN101045816A (en) * | 2007-03-22 | 2007-10-03 | 辽宁大学 | Preparation process of whisher reinforced nylon composite |
| JP2014055269A (en) * | 2012-09-14 | 2014-03-27 | Toray Ind Inc | Polyamide resin composition |
| CN112391050A (en) * | 2020-12-22 | 2021-02-23 | 华东理工大学 | Low-water-absorption PA56/PBT composite material and preparation method thereof |
| CN114479440A (en) * | 2021-12-14 | 2022-05-13 | 华东理工大学 | Low-water-absorption PA56T/PET composite material and preparation method thereof |
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