Preparation method and application of thermoplastic interpenetrating double-network rubber material

Abstract

Starting from polyisoprene or polybutadiene, used dynamic chemical bonds and multiple (including double, triple and quadruple) hydrogen bonds can respectively form crosslinking points, and the dynamic chemical bonds and the multiple (including double, triple and quadruple) hydrogen bonds form an interpenetrating network, so that the rigidity and toughness of the material are balanced, and the rubber material can be repeatedly processed, recycled and thermally repaired; meanwhile, the modified rubber material can be used as a modifying component for modifying a rubber material, and the processing performance and the mechanical performance of the rubber material are regulated and controlled.

Description

Technical Field

[0001] The invention relates to the field of rubber materials, and in particular to the technical field of a preparation method of a thermoplastic interpenetrating double network rubber material and its application. Background Art

[0002] Once rubber is vulcanized, it becomes a thermosetting material and cannot be reshaped, thermally repaired, or reversibly recycled. The environmental problems caused by discarded rubber products have become a hot topic of global concern.

[0003] Thermoplastic elastomer (TPE) is a new type of elastomeric material that has the elasticity of rubber and the processability of thermoplastics, and has gradually become one of the important materials in the field of engineering applications. TPE has rigid segments (hard segments) and flexible segments (soft segments) in its molecular structure. The former mainly affects the elasticity, low-temperature performance, hardness, tear strength, modulus, etc. of the product; the latter produces mild chemical crosslinking and physical crosslinking due to hydrogen bonds between molecular chains and easy formation of crystalline regions. They are destroyed when heated or dissolved, and the polymer undergoes plastic flow, but returns to its original state after cooling. The manufacturing methods of thermoplastic rubber are generally divided into two types: physical crosslinking and chemical crosslinking. Physical crosslinking is to form a certain crosslinking structure by controlling the molecular structure of thermoplastic rubber during heating and cooling; chemical crosslinking is to form a crosslinking structure by adding a crosslinking agent to cause a chemical reaction in the material during heating.

[0004] Interpenetrating double network rubber is formed by two different rubber materials interlaced with each other. Its structure is more complex and has better performance.

[0005] How to prepare a thermoplastic rubber that can be repeatedly processed, recycled, and heat-repaired, and how to easily regulate the processing and mechanical properties of the thermoplastic rubber is a difficult problem to solve in the field of rubber materials. Summary of the invention

[0006] The present invention is to overcome the defects in the prior art and provide a thermoplastic interpenetrating double network rubber material, a preparation method and its application. To achieve the above invention object, the present invention is implemented by the following technical solutions:

[0007] In a first aspect, the present invention first provides a method for preparing a thermoplastic interpenetrating double network rubber material, comprising the following steps:

[0008] S.1. Preparation of a first network, preparing a polymer network by reacting a polymer precursor and a crosslinking agent;

[0009] S.1.1 First, a polymer precursor of the first network is prepared. The polydiene reactant is subjected to an epoxidation reaction with an epoxidation catalyst to epoxidize part of the double bonds on the main chain of polyisoprene to obtain epoxy polyisoprene. Then, in a tetrahydrofuran solvent, the epoxy unit in the epoxy polyisoprene is reacted with hydrochloric acid to introduce hydroxyl groups to obtain a poly(isoprene-r-3-chloro-2-methyl-2-butanol) random copolymer, i.e., polymer precursor 1. The precursor 1 is reacted with acryloyl chloride to introduce double bonds in the side groups to obtain precursor 2.

[0010] The precursor 2 described in S.1.2 reacts with the crosslinker 1 diborate crosslinker to obtain a first network composed of dynamic chemical bonds;

[0011] S.2. Preparation of the second network: The hydroxyl groups in the unreacted polymer precursor 1 in step S.1 react with the crosslinker 2, i.e., 2-hexylisocyanate ureido-4-methylpyrimidone (Upy-NCO), in which the isocyanate reacts with the hydroxyl groups to introduce ureidopyrimidone (Upy); since the preparation of the second network occurs in the first network, the first network and the second network in the system penetrate each other to form an interpenetrating double network, thereby obtaining a thermoplastic interpenetrating double network rubber material.

[0012] Preferably, the polydiene reactant in step S.1.1 is one or more of cis-polyisoprene, cis / trans-polyisoprene, natural rubber latex, and polybutadiene.

[0013] Preferably, the molecular weight of the polydiene in step S.1.1 is in the range of 20,000 to 200,000 g / mol.

[0014] Preferably, the epoxidation reaction catalyst in step S.1.1 is a peroxide, more preferably, m-chloroperbenzoic acid or benzoyl peroxide.

[0015] Preferably, the epoxidation catalyst is added in a molar ratio of 0.2 to 0.5:1 based on the molar number of double bonds in the polydiene reactant.

[0016] Preferably, in step S.1.1, the ratio of the number of moles of HCl in the hydrochloric acid to the number of moles of double bonds in the polydiene reactant is 0.05 to 0.5:1.

[0017] Preferably, in step S.1.1, the molar ratio of the added amount of acryloyl chloride to the precursor 1 is 10 to 100:1.

[0018] Preferably, the crosslinking agent in step S.1.2 is a diboric acid ester crosslinking agent. Optional crosslinking agents include: 1,4-phenylenediboronic acid propylthiol, 4,4′-biphenylenediboronic acid propylthiol or 4,4′-biphenylenediboronic acid propylthiol derivatives containing undecyl-N. Among them, the crosslinking agents shown in formula (A) and formula (B) are rigid molecules, and the crosslinking agent shown in formula (C) contains side chains, which can improve the flexibility of the network. The selection of different crosslinking agents and addition amounts can be used to regulate the mechanical properties of the network, such as modulus, strength, toughness, etc.

[0019]

[0020] Preferably, the molar ratio of crosslinker 1 to precursor 2 in step S.1.2 is 1.1 to 3. By adjusting the amount of crosslinker added, the balance of poly(isoprene-r-3-chloro-2-methyl-2-butanol) random copolymer, i.e., polymer precursor 1, can be adjusted.

[0021] Preferably, in step S.2, the molar ratio of the crosslinking agent 2 to the precursor 1 is 1 to 1.5:1.

[0022] In a second aspect, the present invention further provides a thermoplastic interpenetrating double network rubber material prepared by the preparation method of the first aspect of the present invention.

[0023] In a third aspect, the present invention further provides use of the thermoplastic interpenetrating double network rubber material according to the second aspect of the present invention for modifying a rubber material.

[0024] Preferably, the thermoplastic interpenetrating double network rubber material is blended, extruded or calendered, and vulcanized with synthetic rubber and / or natural rubber to prepare the modified rubber material.

[0025] Therefore, the present invention has the following beneficial effects:

[0026] (1) The present invention starts from polyisoprene or polybutadiene, and the dynamic chemical bonds and multiple (including double, triple, and quadruple) hydrogen bonds used can each form crosslinking points. The former is a sparse flexible network, and the latter is a dense rigid network. The two form an interpenetrating network, balancing the rigidity and toughness of the material, achieving the repeatable processing, recycling, and thermal repairability of the rubber material, and then preparing a high-performance modified rubber material. At the same time, it can be used as a modified component for the modification of rubber materials to regulate their processing performance and mechanical properties.

[0027] (2) By regulating the chain length, epoxidation degree, and molar ratio of the crosslinking agent to the precursor of polyisoprene, the length of the crosslinked chain segment and the crosslinking density can be adjusted, thereby regulating the glass transition temperature, strength and toughness of the material, as well as the thermoplastic processing performance. The interpenetrating double network rubber material prepared by the present invention has viscoelastic and static mechanical properties comparable to those of high-grade natural rubber.

[0028] (3) The main chain structures of precursor 1 and precursor 2 in the interpenetrating double network structure of the present invention are the same. Therefore, the toughness and rigidity of network 1 and network 2 are regulated by the difference in density and dissociation activation energy between crosslinking point 1 and crosslinking point 2, as well as the difference in relaxation dynamics of the crosslinking points.

[0029] (3) The interpenetrating double network modified rubber material prepared by the present invention has a certain cross-linked structure and can be well dispersed and compatible with synthetic isoprene rubber, so it has a certain improvement on the extrusion swell of the rubber material. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a comparison diagram of the rheological behavior of the thermoplastic interpenetrating double network rubber material of the present invention and high-grade natural rubber.

[0031] Figure 2 This is a comparison chart of the effect of adding a thermoplastic interpenetrating double network rubber material on the extrusion swell of synthetic isoprene rubber in Example 7 of the present invention. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments of the specification. Those of ordinary skill in the art will be able to implement the present invention based on these descriptions. In addition, the embodiments of the present invention involved in the following description are generally only embodiments of a part of the present invention, rather than all embodiments. Therefore, based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work should fall within the scope of protection of the present invention.

[0033] Example 1

[0034] Firstly, a thermoplastic interpenetrating double network rubber material is provided, and the preparation method thereof is as follows:

[0035] (1) Preparation of the first network: preparing a polymer network by reacting a polymer precursor with a crosslinking agent.

[0036] First, prepare the polymer precursor of the first network: 20g of polyisoprene with a weight average molecular weight of 20000g / mol is used, and it is completely dissolved in 200ml toluene at room temperature by mechanical stirring, and then oxidized with meta-chloroperbenzoic acid (0.5g) to epoxidize part of the double bonds on the main chain of polyisoprene to obtain epoxy polyisoprene. After filtering, washing, and drying, epoxy polyisoprene is obtained. Then, the epoxy polyisoprene is completely dissolved in tetrahydrofuran solvent, and at room temperature, the epoxy unit in the epoxy polyisoprene reacts with hydrochloric acid (30% concentration, and the addition amount is 5ml), and hydroxyl groups are introduced to obtain poly (isoprene-r-3-chloro-2-methyl-2-butanol) random copolymer, i.e., polymer precursor 1, as shown in the following formula:

[0037]

[0038] Precursor 1 was reacted with acryloyl chloride (2 g) to introduce a double bond into the side group to obtain precursor 2:

[0039] The precursor 2 is reacted with a cross-linking agent, 1,4-phenylenediboronic acid propanethiol, wherein the molar ratio of the cross-linking agent to the precursor 2 is 1.2:1, to obtain a first network containing dynamic chemical bonds, as shown in the following formula;

[0040]

[0041] (2) Preparation of the second network: During the preparation of the first network, there is a surplus of polymer precursor 1. The hydroxyl groups in the unreacted polymer precursor 1 react with the crosslinker 2, i.e., 2-hexylisocyanate ureido-4-methylpyrimidone (Upy-NCO), and the isocyanate therein reacts to introduce ureidopyrimidone (Upy); wherein the molar ratio of the added amount of the crosslinker 2 to the precursor 1 is 1:1, as shown in the following formula;

[0042]

[0043] Since the preparation of the second network occurs in the first network, the first network and the second network in the system penetrate each other to form a thermoplastic interpenetrating double network rubber material, as shown in the following formula:

[0044]

[0045] Measuring rubber viscoelasticity

[0046] The test was carried out using Austrian Anton Paar rotational rheometer MCR302. The test rotor selected a PP25 plate, a PCT200 heating device, a test strain of 5%, a test temperature range of 30 to 150°C, a frequency scanning range of 100 to 0.1 rad / s, and high-purity nitrogen was used to protect the test sample to prevent aging.

[0047] according to Figure 1 It can be seen that the viscoelasticity of the prepared thermoplastic interpenetrating double network rubber material (IP modified rubber) is very similar to that of high-grade natural rubber, indicating that its viscoelastic and static mechanical properties are comparable to those of high-grade natural rubber.

[0048] Example 2

[0049] Firstly, a thermoplastic interpenetrating double network rubber material is provided, and the preparation method thereof is as follows:

[0050] (1) Preparation of the first network: preparing a polymer network by reacting a polymer precursor with a crosslinking agent.

[0051] First, prepare the polymer precursor of the first network: use 20g of polyisoprene with a weight average molecular weight of 100,000g / mol, and completely dissolve it in 200ml of toluene at room temperature through mechanical stirring, and carry out oxidation reaction with m-chloroperbenzoic acid (0.5g) to epoxidize part of the double bonds on the main chain of polyisoprene to obtain epoxy polyisoprene. After filtering, washing with water, and drying, epoxy polyisoprene is obtained. Then, the epoxy polyisoprene is completely dissolved in tetrahydrofuran solvent. At room temperature, the epoxy unit in the epoxy polyisoprene reacts with hydrochloric acid (30% concentration, the addition amount is 5ml), and hydroxyl groups are introduced to obtain poly(isoprene-r-3-chloro-2-methyl-2-butanol) random copolymer, that is, polymer precursor 1;

[0052] Precursor 1 reacts with acryloyl chloride (1 g) to introduce a double bond into the side group to obtain precursor 2;

[0053] The precursor 2 is reacted with a cross-linking agent 1,4-phenylenediboronic acid propanethiol, wherein the molar ratio of the cross-linking agent 1 to the precursor 2 is 1.4:1, to obtain a first network composed of dynamic chemical bonds;

[0054] (2) Preparation of the second network: During the preparation of the first network, there is a surplus of polymer precursor 1. The hydroxyl groups in the unreacted polymer precursor 1 react with the crosslinker 2, i.e., 2-hexylisocyanate ureido-4-methylpyrimidone (Upy-NCO), and the isocyanate groups therein react to introduce ureidopyrimidone (Upy); wherein the molar ratio of the addition amount of the crosslinker 2 to the precursor 1 is 1.2:1.

[0055] Since the preparation of the second network occurs within the first network, the first network and the second network in the system penetrate each other to form a thermoplastic interpenetrating double network rubber material.

[0056] Example 3

[0057] Firstly, a thermoplastic interpenetrating double network rubber material is provided, and the preparation method thereof is as follows:

[0058] (1) Preparation of the first network: preparing a polymer network by reacting a polymer precursor with a crosslinking agent.

[0059] First, prepare the polymer precursor of the first network: use 20g of polyisoprene with a weight average molecular weight of 100,000g / mol, and completely dissolve it in 200ml toluene at room temperature through mechanical stirring, and carry out oxidation reaction with m-chloroperbenzoic acid (0.2g) to epoxidize part of the double bonds on the main chain of polyisoprene to obtain epoxy polyisoprene. After filtering, washing with water, and drying, epoxy polyisoprene is obtained. Then, the epoxy polyisoprene is completely dissolved in tetrahydrofuran solvent. At room temperature, the epoxy unit in the epoxy polyisoprene reacts with hydrochloric acid (30% concentration, the addition amount is 3ml), and hydroxyl groups are introduced to obtain poly(isoprene-r-3-chloro-2-methyl-2-butanol) random copolymer, that is, polymer precursor 1;

[0060] Precursor 1 was reacted with acryloyl chloride (1.5 g) to introduce a double bond into the side group to obtain precursor 2;

[0061] The precursor 2 is reacted with a cross-linking agent 1,4-phenylenediboronic acid propanethiol, wherein the molar ratio of the cross-linking agent 1 to the precursor 2 is 3:1, to obtain a first network composed of dynamic chemical bonds;

[0062] (2) Preparation of the second network: During the preparation of the first network, there is a surplus of polymer precursor 1. The hydroxyl groups in the unreacted polymer precursor 1 react with the crosslinker 2, i.e., 2-hexylisocyanate ureido-4-methylpyrimidone (Upy-NCO), and the isocyanate groups therein react to introduce ureidopyrimidone (Upy); wherein the molar ratio of the addition amount of the crosslinker 2 to the precursor 1 is 1.2:1.

[0063] Since the preparation of the second network occurs within the first network, the first network and the second network in the system penetrate each other to form a thermoplastic interpenetrating double network rubber material.

[0064] Example 4

[0065] Firstly, a thermoplastic interpenetrating double network rubber material is provided, and the preparation method thereof is as follows:

[0066] (1) Preparation of the first network: preparing a polymer network by reacting a polymer precursor with a crosslinking agent.

[0067] First, prepare the polymer precursor of the first network: use 20g of polyisoprene with a weight average molecular weight of 20,000g / mol, and completely dissolve it in 200ml toluene at room temperature through mechanical stirring, and carry out oxidation reaction with m-chloroperbenzoic acid (0.5g) to epoxidize part of the double bonds on the main chain of polyisoprene to obtain epoxy polyisoprene. After filtering, washing with water, and drying, epoxy polyisoprene is obtained. Then, the epoxy polyisoprene is completely dissolved in tetrahydrofuran solvent. At room temperature, the epoxy unit in the epoxy polyisoprene reacts with hydrochloric acid (30% concentration, the addition amount is 3ml), and hydroxyl groups are introduced to obtain poly(isoprene-r-3-chloro-2-methyl-2-butanol) random copolymer, that is, polymer precursor 1;

[0068] Precursor 1 was reacted with acryloyl chloride (1.5 g) to introduce a double bond into the side group to obtain precursor 2;

[0069] The precursor 2 is reacted with a crosslinking agent 4,4′-biphenyldiboronic acid propanethiol, wherein the molar ratio of the crosslinking agent 1 to the precursor 2 is 1.4:1, to obtain a first network composed of dynamic chemical bonds;

[0070] (2) Preparation of the second network: During the preparation of the first network, there is a surplus of polymer precursor 1. The hydroxyl groups in the unreacted polymer precursor 1 react with the crosslinker 2, i.e., 2-hexylisocyanate ureido-4-methylpyrimidone (Upy-NCO), and the isocyanate groups therein react to introduce ureidopyrimidone (Upy); wherein the molar ratio of the addition amount of the crosslinker 2 to the precursor 1 is 1.2:1.

[0071] Since the preparation of the second network occurs within the first network, the first network and the second network in the system penetrate each other to form a thermoplastic interpenetrating double network rubber material.

[0072] Example 5

[0073] Firstly, a thermoplastic interpenetrating double network rubber material is provided, and the preparation method thereof is as follows:

[0074] (1) Preparation of the first network: preparing a polymer network by reacting a polymer precursor with a crosslinking agent.

[0075] First, prepare the polymer precursor of the first network: use 20g of polyisoprene with a weight average molecular weight of 20,000g / mol, completely dissolve it in 200ml of toluene at room temperature through mechanical stirring, and carry out oxidation reaction with m-chloroperbenzoic acid (0.5g) to epoxidize part of the double bonds on the main chain of polyisoprene to obtain epoxy polyisoprene. After filtering, washing with water, and drying, epoxy polyisoprene is obtained. Then, the epoxy polyisoprene is completely dissolved in tetrahydrofuran solvent. At room temperature, the epoxy unit in the epoxy polyisoprene reacts with hydrochloric acid (30% concentration, the addition amount is 5ml), and hydroxyl groups are introduced to obtain poly(isoprene-r-3-chloro-2-methyl-2-butanol) random copolymer, that is, polymer precursor 1;

[0076] Precursor 1 was reacted with acryloyl chloride (2 g) to introduce a double bond into the side group to obtain precursor 2;

[0077] The precursor 2 reacts with the crosslinking agent 4,4′-biphenyldiboronic acid propylthiol, wherein the molar ratio of the crosslinking agent 1 to the precursor 2 is 1.5:1, to obtain a first network composed of dynamic chemical bonds;

[0078] (2) Preparation of the second network: During the preparation of the first network, there is a surplus of polymer precursor 1. The hydroxyl groups in the unreacted polymer precursor 1 react with the crosslinker 2, i.e., 2-hexylisocyanate ureido-4-methylpyrimidone (Upy-NCO), and the isocyanate groups therein react to introduce ureidopyrimidone (Upy); wherein the molar ratio of the addition amount of the crosslinker 2 to the precursor 1 is 1.5:1;

[0079] Since the preparation of the second network occurs within the first network, the first network and the second network in the system penetrate each other to form a thermoplastic interpenetrating double network rubber material.

[0080] Example 6

[0081] Firstly, a thermoplastic interpenetrating double network rubber material is provided, and the preparation method thereof is as follows:

[0082] (1) Preparation of the first network: preparing a polymer network by reacting a polymer precursor with a crosslinking agent.

[0083] First, prepare the polymer precursor of the first network: use 20g of polyisoprene with a weight average molecular weight of 20,000g / mol, completely dissolve it in 200ml of toluene at room temperature through mechanical stirring, and carry out oxidation reaction with m-chloroperbenzoic acid (0.5g) to epoxidize part of the double bonds on the main chain of polyisoprene to obtain epoxy polyisoprene. After filtering, washing with water, and drying, epoxy polyisoprene is obtained. Then, the epoxy polyisoprene is completely dissolved in tetrahydrofuran solvent. At room temperature, the epoxy unit in the epoxy polyisoprene reacts with hydrochloric acid (30% concentration, the addition amount is 5ml), and hydroxyl groups are introduced to obtain poly(isoprene-r-3-chloro-2-methyl-2-butanol) random copolymer, that is, polymer precursor 1;

[0084] Precursor 1 was reacted with acryloyl chloride (2 g) to introduce a double bond into the side group to obtain precursor 2;

[0085] The precursor 2 is reacted with a cross-linking agent 4,4′-biphenyldiboronic acid propylthiol, wherein the molar ratio of the cross-linking agent 1 to the precursor is 1.2:1, to obtain a first network composed of dynamic chemical bonds;

[0086] (2) Preparation of the second network: During the preparation of the first network, there is a surplus of polymer precursor 1. The hydroxyl groups in the unreacted polymer precursor 1 react with the crosslinker 2, i.e., 2-hexylisocyanate ureido-4-methylpyrimidone (Upy-NCO), and the isocyanate groups therein react to introduce ureidopyrimidone (Upy); wherein the molar ratio of the added amount of the crosslinker 2 to the precursor 1 is 1:1.

[0087] Since the preparation of the second network occurs within the first network, the first network and the second network in the system penetrate each other to form a thermoplastic interpenetrating double network rubber material.

[0088] Example 7

[0089] A certain proportion of the interpenetrating double network rubber material prepared in Example 1 was mixed with synthetic isoprene rubber through an internal mixer to prepare a modified rubber material, wherein 5%, 10% and 20% by weight of the interpenetrating double network rubber material were added based on the weight of the synthetic rubber.

[0090] The extrusion swell ratio of the modified rubber material prepared in Example 7 to natural rubber at different shear rates was measured using a capillary rheometer.

[0091] according to Figure 2 , it can be seen that at a shear rate of 100s -1When the extrusion swell ratio of synthetic isoprene rubber is 1.5, the extrusion swell ratios of the modified rubber with 5%, 10%, and 20% by mass of interpenetrating double network rubber material are 1.43, 1.30, and 1.25, respectively, and the expansion ratio is significantly reduced in value. The modified rubber with the addition of interpenetrating double network rubber material has a certain improvement in the extrusion swell of the rubber material because the interpenetrating double network rubber material has a certain cross-linking structure and can be well dispersed and compatible with synthetic isoprene rubber.

[0092] The following examples are provided only to illustrate the present invention and are not intended to limit the scope of protection defined by the appended claims.

Claims

1. A method for preparing a thermoplastic interpenetrating double network rubber material, characterized in that: The steps include: S.

1. Preparation of a first network, preparing a polymer network by reacting a polymer precursor and a crosslinking agent; S.1.1 First, a polymer precursor of the first network is prepared. The polydiene reactant is subjected to an epoxidation reaction with an epoxidation catalyst to epoxidize part of the double bonds on the main chain of polyisoprene to obtain epoxy polyisoprene. Then, in a tetrahydrofuran solvent, the epoxy unit in the epoxy polyisoprene is reacted with hydrochloric acid to introduce hydroxyl groups to obtain a poly(isoprene-r-3-chloro-2-methyl-2-butanol) random copolymer, i.e., polymer precursor 1. The precursor 1 is reacted with acryloyl chloride to introduce double bonds in the side groups to obtain precursor 2. The precursor 2 described in S.1.2 reacts with the crosslinker 1, i.e., a diborate crosslinker, to obtain a first network composed of dynamic chemical bonds; S.

2. Preparation of the second network: The hydroxyl groups in the unreacted polymer precursor 1 in step S.1 react with the crosslinker 2, namely 2-hexylisocyanate ureido-4-methylpyrimidone (Upy-NCO), wherein the isocyanate reacts with the hydroxyl groups to introduce ureido-pyrimidone (Upy); Since the preparation of the second network occurs in the first network, the first network and the second network in the system penetrate each other to form an interpenetrating double network, thereby obtaining a thermoplastic interpenetrating double network rubber material.

2. The method for preparing a thermoplastic interpenetrating double network rubber material according to claim 1, characterized in that: The polydiene reactant described in step S.1.1 is one or more of cis-polyisoprene, cis / trans-polyisoprene, natural rubber latex, and polybutadiene.

3. The method for preparing a thermoplastic interpenetrating double network rubber material according to claim 1, characterized in that: The molecular weight of the polydiene in step S.1.1 is in the range of 20,000 to 200,000 g / mol.

4. The method for preparing a thermoplastic interpenetrating double network rubber material according to claim 1, characterized in that: The epoxidation catalyst in step S.1.1 is a peroxide.

5. The method for preparing a thermoplastic interpenetrating double network rubber material according to claim 4, characterized in that: The peroxide is m-chloroperbenzoic acid, benzoyl peroxide or a blend of an organic acid and hydrogen peroxide.

6. The method for preparing a thermoplastic interpenetrating double network rubber material according to claim 1, characterized in that: The added proportion of the epoxy additive is calculated based on the molar number of double bonds in the polydiene reactant, and the molar ratio of the epoxy additive to the double bonds in the polydiene reactant is 0.2-0.5:

1.

7. The method for preparing a thermoplastic interpenetrating double network rubber material according to claim 1, characterized in that: In step S.1.2, the molar ratio of crosslinker 1 to precursor 2 is 1.1 to 3.

8. The method for preparing a thermoplastic interpenetrating double network rubber material according to claim 1, characterized in that: In step S.2, the amount of crosslinking agent 2 added is calculated based on the molar amount of precursor 1, and the molar ratio of the amount of crosslinking agent added to precursor 1 is 1 to 1.5:

1.

9. A thermoplastic interpenetrating double network rubber material, characterized in that: Prepared by the method according to any one of claims 1 to 8.

10. The use of the thermoplastic interpenetrating double network rubber material according to claim 9 for modifying rubber materials, characterized in that: The thermoplastic interpenetrating double network rubber material described in claim 9 is blended with synthetic rubber and / or natural rubber, extruded or calendered, and vulcanized to modify the rubber material.

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