Plasticizer-free bio-based PA1010 modified material and preparation method thereof

Abstract

The invention relates to the field of material modification processing, in particular to the field of C08L77 / 00, and specifically relates to a plasticizer-free bio-based PA1010 modified material and a preparation method thereof. The bio-based PA1010 modified material is prepared from the following raw materials: PA1010 resin, diamine, a nucleating agent, a lubricating agent, a dispersing agent, a light stabilizer and an antioxidant. The preparation raw materials of the bio-based PA1010 modified material do not comprise a plasticizer with certain pollution property, and specific diamine is selected, so that the prepared product has excellent mechanical properties and relatively excellent environmental protection performance.

Description

Technical Field

[0001] The present invention relates to the field of material modification and processing, in particular to the field of C08L77 / 00, and specifically to a plasticizer-free bio-based PA1010 modified material and a preparation method thereof. Background Art

[0002] PA1010, commonly known as nylon 1010, is a common engineering plastic with its main component being polydecanediamide. PA1010 has a low density and mass, but it has high mechanical strength, good toughness, and is resistant to wear, oil, chemicals, and mildew. At the same time, it also has self-lubrication, electrical insulation, and good dimensional stability. In addition, PA1010 has good melt fluidity, excellent processing performance, and is easy to mold and process. It can be made into parts of various shapes and sizes, and can be produced by various methods such as injection molding, blow molding, and extrusion molding. Due to its excellent comprehensive performance, PA1010 is widely used in textiles, medical devices, automobiles, ships, aerospace, and other fields. In addition, PA1010 is an environmentally friendly bio-based material, and the production and processing of pipes using it as raw material meets the requirements of sustainable development.

[0003] PA1010 has a high melting point and is difficult to blend with other polymers at lower processing temperatures. Through modification processing, its melting point can be lowered, its processing performance can be improved, and it can be easier to blend or process with other materials. In order to improve the processing performance of nylon, plasticizers are generally used for modification. Plasticizers can lower the melting temperature and viscosity of nylon materials, increase their fluidity, and make them easier to perform molding processes such as injection molding and extrusion. However, nylon materials themselves have excellent wear resistance and chemical corrosion resistance. The addition of plasticizers may destroy the hydrogen bonding between nylon molecular chains, resulting in reduced wear resistance and chemical corrosion resistance of the material; at the same time, the addition of plasticizers may reduce the tensile strength, bending strength and other mechanical properties of nylon, which may limit the use of nylon in some special application scenarios.

[0004] Prior art CN106948024B discloses a high melting point aromatic copolymer nylon 66 fiber and a preparation method thereof, wherein the raw materials for preparing the fiber include aromatic dicarboxyl monomers, aliphatic monomers, and PA66 salts; wherein the aromatic dicarboxyl monomers are one or more of terephthalic acid, phthalic acid, isophthalic acid, 2,6-naphthalene dicarboxylic acid, 1,4-naphthalene dicarboxylic acid, 1,8-naphthalene dicarboxylic acid, and 4,4'-biphenyl dicarboxylic acid; the aliphatic monomers are one or more of hexamethylenediamine, butanediamine, octanediamine, and decanediamine; introducing some aromatic diamines, aromatic diacids, or diacids or diamines containing aromatic rings into the PA66 main chain can greatly improve the thermal stability and mechanical properties of PA66; however, the inventors found in the actual research and development process that not all aliphatic monomers can play a positive role in promoting the processing performance of PA1010. Summary of the invention

[0005] In order to solve the above technical problems, the first aspect of the present invention provides a plasticizer-free bio-based PA1010 modified material, whose raw materials include: PA1010 resin, diamine, nucleating agent, lubricant, dispersant, light stabilizer, and antioxidant.

[0006] Further preferably, the raw materials of the bio-based PA1010 modified material include, by weight: 78-92 parts of PA1010 resin, 8-22 parts of diamine, 0-1 part of nucleating agent, 1-5 parts of lubricant, 3-5 parts of dispersant, 0-1 part of light stabilizer, and 0-1 part of antioxidant.

[0007] PA1010 resin

[0008] Preferably, the relative viscosity of the PA1010 resin at 25° C. is 1.9-2.6 dL / g.

[0009] Further preferably, the relative viscosity of the PA1010 resin at 25° C. is 1.9-2.3 dL / g; as an implementable case, the PA1010 resin can be purchased from Jinyu Nylon New Materials.

[0010] The relative viscosity of PA1010 resin has a significant impact on the processing performance of the material. The PA1010 melt with a higher relative viscosity has poor fluidity during processing, which will increase the difficulty of molding processes such as injection molding and extrusion. Poor fluidity may cause uneven filling of the melt in the mold, affecting the appearance and dimensional accuracy of the pipe. Due to the high relative viscosity, PA1010 resin may require a higher molding temperature during processing to ensure that the melt can flow smoothly and fill the mold. However, too high a temperature may also cause oxidation and degradation of other auxiliary materials, affecting the performance of the product. PA1010 resin melt with a lower relative viscosity has better fluidity during processing, can better fill the mold, and reduce the occurrence of problems such as melt fracture and surface roughness. However, PA1010 resin melt has good fluidity. When the injection pressure or injection speed is not set properly during processing, the melt may overflow from the parting surface or other gaps of the mold, and the overflow phenomenon increases. In addition, relative viscosity is a manifestation of the interaction force between molecules within PA1010. The relatively low viscosity of PA1010 may mean that its intermolecular interaction force is weaker, so the processed pipe is more likely to deform or break when subjected to external force, thereby reducing the mechanical properties of the product; therefore, based on the above considerations, the relative viscosity of the preferred PA1010 resin in the present invention is 1.9-2.6dL / g, which can ensure that the product has both processing performance and mechanical properties.

[0011] Diamine

[0012] Preferably, the diamine includes polyether diamine; as an implementable case, the polyether diamine model includes: Huntsman RP-2000.

[0013] The terminal amino group of polyether diamine has high reactivity and moderate alkalinity. Therefore, polyether diamine can react with the amide group in the PA1010 resin molecule without a catalyst for polycondensation reaction to form a polyether block polyamide copolymer, which can improve the elasticity, flexibility, impact resistance and low temperature resistance of the material. At the same time, the addition of polyether diamine can adjust the crystallization performance and melt fluidity of PA1010 resin, thereby improving its processing performance. This makes PA1010 resin easier to shape during injection molding, extrusion and other processing processes, reducing processing difficulty and cost.

[0014] However, not all diamines are suitable for the modification of the PA1010 resin in the present invention. Aliphatic diamines such as hexamethylenediamine have strong alkalinity due to the presence of terminal amino groups. Therefore, hexamethylenediamine will react violently during the material processing process. Under high temperature conditions, it will destroy the amide bonds in the PA1010 resin molecules. At the same time, when the processing temperature is too high, the molecular chain of hexamethylenediamine will also be broken, and the product cannot be processed and extruded normally.

[0015] Nucleating Agent

[0016] Preferably, the nucleating agent comprises an organic polyamide oligomer.

[0017] Further preferably, the organic amide oligomer includes polydimethylamine oxalate; as an implementable case, the nucleating agent includes German Brüggemann TP-P1401.

[0018] The nucleating agent polydimethylamine oxalic acid can provide seeds or crystal nuclei to initiate the polymerization reaction during the synthesis or processing of nylon, prompting the PA1010 resin molecular chain to form initial crystal nuclei as soon as possible in the melt state during processing, thereby accelerating the crystallization process. This nucleation effect helps to improve the crystallinity and crystallization rate of PA1010 resin.

[0019] Lubricants

[0020] Preferably, the melting range of the lubricant is 120-200°C.

[0021] Further preferably, the melting range of the lubricant is 130-150° C.; as an implementable case, the lubricant includes Weihai Chenyuan CYD-816A.

[0022] The present invention selects the dendritic lubricant Weihai Chenyuan CYD-816A with a melting range of 130-150°C, which can double the processing fluidity of PA1010 nylon products, effectively improve the mechanical properties of nylon products, and improve the dispersibility of other additives in the PA1010 system, thereby improving the surface gloss of the product.

[0023] Dispersants

[0024] Preferably, the dispersant comprises: one of HyPer C100, HyPer C181, HyPer C182, HyPer C182D, and HBP-160, all of which are purchased from Wuhan Hyperbranched.

[0025] Further preferably, the dispersant is Wuhan hyperbranched HyPer C182.

[0026] The dispersant selected by the present invention has good thermal stability, no volatility, no precipitation, and yellowing resistance, can improve the dispersion degree of each component in the PA1010 resin system, and can also effectively improve the flow performance during the processing, and the melt index is doubled without affecting the mechanical properties of the product.

[0027] Antioxidants

[0028] Preferably, the antioxidant includes phosphite antioxidant and hindered phenol antioxidant.

[0029] Preferably, the phosphite antioxidant includes: one of antioxidant 168, bisphenol A phosphite, DHOP, and antioxidant 126.

[0030] Preferably, the hindered phenol antioxidant includes: one of antioxidant 1010, antioxidant 1098, antioxidant 1076, and antioxidant 330.

[0031] Further preferably, the antioxidant includes antioxidant 1098 and antioxidant 168 in a mass ratio of 1:1, both of which are purchased from BASF.

[0032] Phosphite antioxidants and hindered phenol antioxidants can produce significant synergistic effects when used together. Phosphite antioxidants can decompose peroxides in polymers, thereby reducing the burden of hindered phenol antioxidants; while hindered phenol antioxidants can capture free radicals to prevent further oxidation reactions. Antioxidant 1098 and Antioxidant 168 work together to significantly improve the antioxidant properties of PA1010 resin products.

[0033] Light Stabilizer

[0034] The present invention does not further limit the physical parameters of light stability, and any component that can absorb or reflect ultraviolet rays and significantly improve the light stability of PA1010 resin materials can be used, including but not limited to: one or more of Tinuvin 1130, Tinuvin 234, Tinuvin 328, Tinuvin 326, Tinuvin 384, Tinuvin 171, Tinuvin 900, Tinuvin 571, Tinuvin 928, Tinuvin 400, Tinuvin 477, Tinuvin 405, Tinuvin 479, Tinuvin 770, Tinuvin 292, Tinuvin 123, Tinuvin 144, and Tinuvin 152; all of which can be purchased from BASF.

[0035] The second aspect of the present invention provides a method for preparing a plasticizer-free bio-based PA1010 modified material, comprising the following steps:

[0036] S1. Add PA1010 resin, nucleating agent, lubricant, dispersant, light stabilizer and antioxidant into a high-speed mixer and mix them;

[0037] S2, heating the diamine to fully melt it;

[0038] S3. Add the mixture obtained in step S1 to the main feed loss-in-weight scale for weighing, add the diamine in step S2 to the liquid loss-in-weight scale, then continuously open the main feed loss-in-weight scale and the liquid loss-in-weight scale to add to the twin-screw extruder, and perform blending, extrusion, belt drawing, cooling, drying, and pelletizing to obtain the product.

[0039] Preferably, the heating temperature of the diamine in step S2 is 60-75°C.

[0040] Preferably, in the step S3, the temperature of the co-extrusion is 250-300° C., the screw speed is 300-400 rpm, and the vacuum degree is -0.4-0.09 MPa.

[0041] During the modification and preparation of bio-based PA1010 modified materials, polyether diamine and PA1010 resin can undergo polymerization to generate the main product amide and the by-product water. However, the reaction is reversible. In the presence of water, the carbonyl group (C=O) in the amide will be attacked by water molecules to form hydroxyl (-OH) and amine (-NH 2 ), and the final amide decomposes into the corresponding acid and amine, so in the process of co-extrusion, the by-product water needs to be removed in time. In the process of co-extrusion in the present invention, the vacuum degree is limited to -0.4 to 0.09 MPa, which can ensure that the by-product water is removed in time, so the mechanical properties and stability of the product will not be significantly affected.

[0042] Beneficial Effects

[0043] (i) The present invention does not use plasticizers in the process of modifying the PA1010 resin. As is known to all, a large amount of waste water, waste gas and waste residue will be generated during the production and use of plasticizers. If these wastes are not properly handled, they will cause serious pollution to the environment. Therefore, the raw materials and processes of the present invention are relatively green and environmentally friendly.

[0044] (ii) The present invention selects a specific diamine polyether diamine, which can ensure that the product has excellent mechanical properties and has better processing performance than aliphatic diamine as raw material.

[0045] (III) In the present invention, the relative viscosity of the raw material PA1010 resin is limited by parameters, which can ensure that the product has both processing performance and mechanical properties.

[0046] (iv) The present invention selects a specific dendritic lubricant, which can double the processing fluidity of PA1010 resin, effectively improve the mechanical properties of nylon products, and at the same time improve the dispersibility of other additives in the PA1010 resin system and improve the surface gloss of the product.

[0047] (V) In the process of preparing the bio-based PA1010 modified material, the vacuum degree of the blending extrusion is controlled to be -0.4 to 0.09 MPa, which can ensure that the by-product water is removed in time during the processing and will not affect the final physical properties of the pipe product. DETAILED DESCRIPTION

[0048] Example 1

[0049] The first aspect of this example provides a plasticizer-free bio-based PA1010 modified material, the raw materials of which include, by weight: 92 parts of PA1010 resin, 8 parts of diamine, 0.4 parts of nucleating agent, 3.0 parts of lubricant, 5 parts of dispersant, 0.3 parts of light stabilizer, and 0.6 parts of antioxidant.

[0050] The PA1010 resin has a relative viscosity of 1.9-2.3 dL / g at 25° C. and is purchased from Jinyu Nylon New Materials.

[0051] The diamine is polyether diamine, and its model is Huntsman RP-2000.

[0052] The nucleating agent is polydimethylamine oxalate, and its model is German Brueggemann TP-P1401.

[0053] The melting range of the lubricant is 130-150° C., and the model is Weihai Chenyuan CYD-816A.

[0054] The dispersant is Wuhan hyperbranched HyPer C182.

[0055] The light stabilizer is Tinuvin 234, purchased from BASF.

[0056] The antioxidants include phosphite antioxidants and hindered phenol antioxidants, with a mass ratio of 1:1; the phosphite antioxidant is antioxidant 168; the hindered phenol antioxidant is antioxidant 1098, both of which are purchased from BASF.

[0057] The second aspect of this example provides a method for preparing a plasticizer-free bio-based PA1010 modified material, which comprises the following steps:

[0058] S1. Add PA1010 resin, nucleating agent, lubricant, dispersant, light stabilizer and antioxidant into a high-speed mixer and mix them;

[0059] S2, heating the diamine at 60°C to fully melt;

[0060] S3. Add the mixture obtained in step S1 to the main feed weight loss scale for weighing, add the diamine in step S2 to the liquid weight loss scale, then continuously open the main feed weight loss scale and the liquid weight loss scale, add the mixture to the twin-screw extruder, and perform blending and extrusion, belt drawing, cooling, drying, and pelletizing to obtain the mixture; wherein the blending and extrusion temperature is 255° C., the screw speed is 350 rpm, and the vacuum degree is -0.095 MPa.

[0061] Example 2

[0062] This example provides a plasticizer-free bio-based PA1010 modified material, the raw materials of which include, by weight: 88 parts of PA1010 resin, 12 parts of diamine, 0.4 parts of nucleating agent, 3.0 parts of lubricant, 5 parts of dispersant, 0.3 parts of light stabilizer, and 0.6 parts of antioxidant.

[0063] The PA1010 resin has a relative viscosity of 1.9-2.3 dL / g at 25° C. and is purchased from Jinyu Nylon New Materials.

[0064] The diamine is polyether diamine, and its model is Huntsman RP-2000.

[0065] The nucleating agent is polydimethylamine oxalate, and its model is German Brueggemann TP-P1401.

[0066] The melting range of the lubricant is 130-150° C., and the model is Weihai Chenyuan CYD-816A.

[0067] The dispersant is Wuhan hyperbranched HyPer C182.

[0068] The light stabilizer is Tinuvin 234, purchased from BASF.

[0069] The antioxidants include phosphite antioxidants and hindered phenol antioxidants, with a mass ratio of 1:1; the phosphite antioxidant is antioxidant 168; the hindered phenol antioxidant is antioxidant 1098, both of which are purchased from BASF.

[0070] Example 3

[0071] This example provides a plasticizer-free bio-based PA1010 modified material, the raw materials of which include, by weight: 84 parts of PA1010 resin, 16 parts of diamine, 0.4 parts of nucleating agent, 3.0 parts of lubricant, 5 parts of dispersant, 0.3 parts of light stabilizer, and 0.6 parts of antioxidant.

[0072] The PA1010 resin has a relative viscosity of 1.9-2.3 dL / g at 25° C. and is purchased from Jinyu Nylon New Materials.

[0073] The diamine is polyether diamine, and its model is Huntsman RP-2000.

[0074] The nucleating agent is polydimethylamine oxalate, and its model is German Brueggemann TP-P1401.

[0075] The melting range of the lubricant is 130-150° C., and the model is Weihai Chenyuan CYD-816A.

[0076] The dispersant is Wuhan hyperbranched HyPer C182.

[0077] The light stabilizer is Tinuvin 234, purchased from BASF.

[0078] The antioxidants include phosphite antioxidants and hindered phenol antioxidants, with a mass ratio of 1:1; the phosphite antioxidant is antioxidant 168; the hindered phenol antioxidant is antioxidant 1098, both of which are purchased from BASF.

[0079] Example 4

[0080] This example provides a plasticizer-free bio-based PA1010 modified material, the raw materials of which include, by weight: 80 parts of PA1010 resin, 20 parts of diamine, 0.4 parts of nucleating agent, 3.0 parts of lubricant, 5 parts of dispersant, 0.3 parts of light stabilizer, and 0.6 parts of antioxidant.

[0081] The PA1010 resin has a relative viscosity of 1.9-2.3 dL / g at 25° C. and is purchased from Jinyu Nylon New Materials.

[0082] The diamine is polyether diamine, and its model is Huntsman RP-2000.

[0083] The nucleating agent is polydimethylamine oxalate, and its model is German Brueggemann TP-P1401.

[0084] The melting range of the lubricant is 130-150° C., and the model is Weihai Chenyuan CYD-816A.

[0085] The dispersant is Wuhan hyperbranched HyPer C182.

[0086] The light stabilizer is Tinuvin 234, purchased from BASF.

[0087] The antioxidants include phosphite antioxidants and hindered phenol antioxidants, with a mass ratio of 1:1; the phosphite antioxidant is antioxidant 168; the hindered phenol antioxidant is antioxidant 1098, both of which are purchased from BASF.

[0088] Example 5

[0089] This example provides a plasticizer-free bio-based PA1010 modified material, the raw materials of which include, by weight: 78 parts of PA1010 resin, 22 parts of diamine, 0.4 parts of nucleating agent, 3.0 parts of lubricant, 5 parts of dispersant, 0.3 parts of light stabilizer, and 0.6 parts of antioxidant.

[0090] The PA1010 resin has a relative viscosity of 1.9-2.3 dL / g at 25° C. and is purchased from Jinyu Nylon New Materials.

[0091] The diamine is polyether diamine, and its model is Huntsman RP-2000.

[0092] The nucleating agent is polydimethylamine oxalate, and its model is German Brueggemann TP-P1401.

[0093] The melting range of the lubricant is 130-150° C., and the model is Weihai Chenyuan CYD-816A.

[0094] The dispersant is Wuhan hyperbranched HyPer C182.

[0095] The light stabilizer is Tinuvin 234, purchased from BASF.

[0096] The antioxidants include phosphite antioxidants and hindered phenol antioxidants, with a mass ratio of 1:1; the phosphite antioxidant is antioxidant 168; the hindered phenol antioxidant is antioxidant 1098, both of which are purchased from BASF.

[0097] Comparative Example 1

[0098] The first aspect of this example provides a plasticizer-free bio-based PA1010 modified material, the raw materials of which include, by weight: 78 parts of PA1010 resin, 22 parts of diamine, 0.4 parts of nucleating agent, 3.0 parts of lubricant, 5 parts of dispersant, 0.3 parts of light stabilizer, and 0.6 parts of antioxidant.

[0099] The PA1010 resin has a relative viscosity of 1.9-2.3 dL / g at 25° C. and is purchased from Jinyu Nylon New Materials.

[0100] The diamine is polyether diamine, and its model is Huntsman RP-2000.

[0101] The nucleating agent is polydimethylamine oxalate, and its model is German Brueggemann TP-P1401.

[0102] The melting range of the lubricant is 130-150° C., and the model is Weihai Chenyuan CYD-816A.

[0103] The dispersant is Wuhan hyperbranched HyPer C182.

[0104] The light stabilizer is Tinuvin 234, purchased from BASF.

[0105] The antioxidants include phosphite antioxidants and hindered phenol antioxidants, with a mass ratio of 1:1; the phosphite antioxidant is antioxidant 168; the hindered phenol antioxidant is antioxidant 1098, both of which are purchased from BASF.

[0106] The second aspect of this example provides a method for preparing a plasticizer-free bio-based PA1010 modified material, which comprises the following steps:

[0107] S1. Add PA1010 resin, nucleating agent, lubricant, dispersant, light stabilizer and antioxidant into a high-speed mixer and mix them;

[0108] S2, heating the diamine at 60°C to fully melt;

[0109] S3. Add the mixture obtained in step S1 to the main feed loss-in-weight scale for weighing, add the diamine in step S2 to the liquid loss-in-weight scale, then continuously open the main feed loss-in-weight scale and the liquid loss-in-weight scale to add the twin-screw extruder, and perform blending and extrusion, strip drawing, cooling, drying, and pelletizing to obtain the product; wherein the blending and extrusion temperature is 255° C., the screw speed is 350 rpm, and the pressure is 1 standard atmosphere.

[0110] In Comparative Example 1, since no vacuum dehydration step was provided, the reaction could not proceed normally.

[0111] Comparative Example 2

[0112] The first aspect of this example provides a plasticizer-free bio-based PA1010 modified material, the raw materials of which include, by weight: 78 parts of PA1010 resin, 22 parts of diamine, 0.4 parts of nucleating agent, 3.0 parts of lubricant, 5 parts of dispersant, 0.3 parts of light stabilizer, and 0.6 parts of antioxidant.

[0113] The PA1010 resin has a relative viscosity of 1.9-2.3 dL / g at 25° C. and is purchased from Jinyu Nylon New Materials.

[0114] The diamine is hexamethylenediamine.

[0115] The nucleating agent is polydimethylamine oxalate, and its model is German Brueggemann TP-P1401.

[0116] The melting range of the lubricant is 130-150° C., and the model is Weihai Chenyuan CYD-816A.

[0117] The dispersant is Wuhan hyperbranched HyPer C182.

[0118] The light stabilizer is Tinuvin 234, purchased from BASF.

[0119] The antioxidants include phosphite antioxidants and hindered phenol antioxidants, with a mass ratio of 1:1; the phosphite antioxidant is antioxidant 168; the hindered phenol antioxidant is antioxidant 1098, both of which are purchased from BASF.

[0120] The product in this example could not be extruded normally, and the corresponding tensile strength and elongation at break could not be measured.

[0121] Performance Evaluation

[0122] Test objects: the products prepared corresponding to Examples 1-5. The test results are shown in Table 1.

[0123] Test various performance parameters according to the following standards:

[0124] Tensile strength (MPa): ASTM D638-2014;

[0125] Elongation at break (%): ASTM D638-2014.

[0126] Table 1

[0127] Tensile strength / MPa Elongation at break / % Example 1 46 420 Example 2 42.1 437 Example 3 38.1 570 Example 4 27.3 689 Example 5 22.9 759

Claims

1. A plasticizer-free bio-based PA1010 modified material, characterized in that: The raw materials of the bio-based PA1010 modified material include, by weight: 78-92 parts of PA1010 resin, 8-22 parts of diamine, 0-1 parts of nucleating agent, 1-5 parts of lubricant, 3-5 parts of dispersant, 0-1 parts of light stabilizer, and 0-1 parts of antioxidant.

2. The plasticizer-free bio-based PA1010 modified material according to claim 1, characterized in that: The melting range of the lubricant is 120-200°C.

3. The plasticizer-free bio-based PA1010 modified material according to claim 1, characterized in that: The relative viscosity of the PA1010 resin at 25° C. is 1.9-2.6 dL / g.

4. The plasticizer-free bio-based PA1010 modified material according to claim 1, characterized in that: The diamines include polyether diamines.

5. The plasticizer-free bio-based PA1010 modified material according to claim 2, characterized in that: The melting range of the lubricant is 130-150°C.

6. The plasticizer-free bio-based PA1010 modified material according to claim 1, characterized in that: The dispersant includes: one of HyPer C100, HyPer C181, HyPer C182, HyPer C182D, and HBP-160.

7. The plasticizer-free bio-based PA1010 modified material according to claim 1, characterized in that: The antioxidants include phosphite antioxidants and hindered phenol antioxidants.

8. A method for preparing a plasticizer-free bio-based PA1010 modified material according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Add PA1010 resin, nucleating agent, lubricant, dispersant, light stabilizer and antioxidant into a high-speed mixer and mix them; S2, heating the diamine to fully melt it; S3. Add the mixture obtained in step S1 to the main feed loss-in-weight scale for weighing, add the diamine in step S2 to the liquid loss-in-weight scale, then continuously open the main feed loss-in-weight scale and the liquid loss-in-weight scale, add to the twin-screw extruder, and perform blending, extrusion, belt drawing, cooling, drying, and pelletizing to obtain the product.

9. The method for preparing the plasticizer-free bio-based PA1010 modified material according to claim 8, characterized in that: The heating temperature of the diamine in the step S2 is 60-75°C.

10. The method for preparing the plasticizer-free bio-based PA1010 modified material according to claim 8, characterized in that: In the step S3, the temperature of the blending and extrusion is 250-300° C., the screw speed is 300-400 rpm, and the vacuum degree is -0.4-0.09 MPa.