PVC / ABS modified material and preparation method thereof

Abstract

The application discloses PVC / ABS modified material and a preparation method thereof, and belongs to the technical field of polymer materials. The PVC / ABS modified material comprises the following raw materials in parts by weight: PVC: 60-70 parts, ABS: 20-40 parts, plasticizer: 6-12 parts, antioxidant: 2-3 parts, stabilizer: 2-3 parts, lubricant: 3-5 parts, and compatible agent: 2-4 parts. The pentaerythritol tetraoleate is reacted under the action of formic acid and H2O2 solution to generate pentaerythritol epoxy compound; the pentaerythritol epoxy compound is reacted with dodecylamine to generate long-chain alkyl modified pentaerythritol compound; and the long-chain alkyl modified pentaerythritol compound is reacted with hydroxyl-terminated phenyl silicone oil to prepare the lubricant. The PVC / ABS modified material prepared by the application has excellent melt flow rate, tensile strength and notched impact strength.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high polymer materials, in particular to a PVC / ABS modified material and a preparation method thereof. BACKGROUND

[0002] In the field of materials today, polyvinyl chloride (PVC) and acrylonitrile-butadiene-styrene copolymer (ABS) are two important polymer materials, each with a wide range of applications and unique performance characteristics. PVC has good chemical corrosion resistance, flame resistance, high cost performance, and is widely used in construction, automobiles, electronics and electrical appliances, such as pipe, profile, cable insulation, etc. However, PVC materials also have some shortcomings, such as relatively poor toughness, brittle at low temperature, and poor processing flow, which to some extent limits its use in some high-end application fields or special product manufacturing. ABS material is known for its excellent overall performance, with good impact strength, mechanical processing performance, dimensional stability, and easy molding, commonly used in household appliance housings, automotive parts, toys, etc. However, ABS material has poor weather resistance and is easily aged and deteriorated by ultraviolet radiation and climate changes when exposed to outdoor environments for a long time, and its chemical corrosion resistance is not as good as PVC, which can swell or deform when exposed to certain organic solvents.

[0003] Therefore, blending and modifying PVC and ABS to produce PVC / ABS modified materials with the advantages of both materials has become an important direction in material research and development. This modified material aims to overcome the shortcomings of single materials, achieve performance complementation and optimization through specific formulation design and preparation process. However, in the actual blending and modification process, there are many technical difficulties such as poor two-phase compatibility, uneven dispersion, and increased flow resistance of mixed materials in the processing equipment, affecting processing efficiency, leading to rough product surface and internal defects, etc.

[0004] Chinese invention patent CN102382388A discloses a PVC / ABS alloy material with high impact strength and its preparation method. The PVC / ABS alloy material is composed of 30-80% of PVC composite material filled with active nano calcium carbonate and modified by weight ratio, and 20-70% of injection molding grade ABS resin. The PVC / ABS alloy material has excellent impact strength, but poor tensile properties and compatibility. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application aims to provide a PVC / ABS modified material and a preparation method thereof.

[0006] To achieve the above-mentioned purpose, the present application realizes the following technical solutions:

[0007] A PVC / ABS modified material, comprising the following raw materials in parts by weight:

[0008] PVC: 60-70 parts, ABS: 20-40 parts, plasticizer: 6-12 parts, antioxidant: 2-3 parts, stabilizer: 2-3 parts, lubricant: 3-5 parts, compatibilizer: 2-4 parts;

[0009] The lubricant is prepared by the following method:

[0010] S1: pentaerythritol tetraoleate reacts under the action of formic acid and H2O2 solution to generate pentaerythritol epoxy compound; the reaction equation is as follows:

[0011] ;

[0012] The nuclear magnetic hydrogen spectrum data are as follows:

[0013] 1 H NMR (500 MHz, Chloroform-d) δ 4.14 (s, 8H), 3.10 (t, J = 4.3 Hz,8H), 2.36 (t, J = 8.5 Hz, 8H), 1.78 (dtd, J = 13.4, 7.9, 4.4 Hz, 8H), 1.62 –1.49 (m, 16H), 1.49 – 1.37 (m, 8H), 1.35 – 1.21 (m, 72H), 0.92 – 0.86 (m,12H);

[0014] S2: pentaerythritol epoxy compound reacts with dodecylamine to generate long-chain alkyl modified pentaerythritol compound; the reaction equation is as follows:

[0015] ;

[0016] The nuclear magnetic hydrogen spectrum data are as follows:

[0017] 1H NMR (500 MHz, Chloroform-d) δ 4.14 (s, 8H), 3.66 (qd, J = 6.2, 5.2 Hz, 3H), 3.10 (t, J = 4.3 Hz, 2H), 3.04 (d, J = 5.3 Hz, 3H), 2.96 - 2.88 (m, 3H), 2.85 - 2.69 (m, 6H), 2.65 - 2.57 (m, 3H), 2.36 (t, J = 8.5 Hz, 8H), 1.83 - 1.73 (m, 2H), 1.62 - 1.50 (m, 16H), 1.53 - 1.32 (m, 14H), 1.36 - 1.29 (m, 8H), 1.32 - 1.21 (m, 124H), 0.94 - 0.85 (m, 21H);

[0018] S3: long chain alkyl modified pentaerythritol compound reacts with hydroxyl-terminated phenyl silicone oil to generate lubricant; in the reaction, the epoxy group in the long chain alkyl modified pentaerythritol reacts with the silicon hydroxyl group in the hydroxyl-terminated phenyl silicone oil.

[0019] In step S1, the mass ratio of the pentaerythritol tetraoleate, formic acid and H2O2 solution is 20:(4.8-6):(12-15).

[0020] In step S2, the molar ratio of the pentaerythritol epoxy compound to dodecylamine is 1:(3.0-3.2).

[0021] In step S3, the mass ratio of the long chain alkyl modified pentaerythritol compound to hydroxyl-terminated phenyl silicone oil is (5-7):1.

[0022] The compatibilizer is prepared by the following method:

[0023] A1: glycidyl methacrylate, maleic anhydride, octadecyl methacrylate react under the action of initiator AIBN to generate random copolymer;

[0024] A2: the random copolymer reacts with 4-mercaptophenyl boronic acid farnesol ester to generate compatibilizer.

[0025] In step A1, the molar ratio of the glycidyl methacrylate, maleic anhydride, octadecyl methacrylate is 1.5:1:1.2.

[0026] In step A2, the mass ratio of the random copolymer to 4-mercaptophenyl boronic acid farnesol ester is 10:1.

[0027] The plasticizer is one of dioctyl phthalate, dibutyl phthalate, diisononyl phthalate.

[0028] The stabilizer is one of JX-181 organic tin heat stabilizer, JX-107 reverse ester tin heat stabilizer, JT-101 thiol antimony heat stabilizer; the antioxidant is one of antioxidant 1076, antioxidant 1010.

[0029] A preparation method of a PVC / ABS modified material, comprising the following steps:

[0030] (1) weigh PVC: 60-70 parts, ABS: 20-40 parts, plasticizer: 6-12 parts, antioxidant: 2-3 parts, stabilizer: 2-3 parts, lubricant: 3-5 parts, and compatibility agent: 2-4 parts by weight;

[0031] (2) add PVC, ABS, plasticizer, stabilizer and antioxidant into a high-speed mixer, mix at 85-95 DEG C for 20-30 min, heat to 100-115 DEG C, add lubricant and compatibility agent, pre-plasticize for 20-30 min, and then convey to a double-screw extruder for extrusion, air cooling and sieving, so as to obtain the PVC / ABS modified material.

[0032] Due to the above technical scheme, the present application has the following beneficial effects:

[0033] (1) The prepared lubricant takes pentaerythritol ester as the core, provides internal lubrication with multiple alkyl chains, reduces the viscosity of PVC / ABS melt, and enhances surface lubrication and heat resistance with phenyl silicone oil chain.

[0034] (2) The prepared compatibility agent significantly improves the interface compatibility, processing stability and mechanical properties of PVC / ABS through multiple mechanisms of polar interaction, dynamic covalent bond and long-chain toughening. DETAILED DESCRIPTION

[0035] The present application will be further described below in combination with examples, but the present application is not limited to these examples.

[0036] Example 1: Preparation of lubricant

[0037] S1: add 1000 ml of DMF, 200 g of pentaerythritol tetraoleate and 7 g of strong acid cation exchange resin into a reactor in sequence, stir and heat to 50 DEG C, simultaneously drop 48 g of formic acid and 120 g of H2O2 solution (30 wt%), drop for 60 min, heat to 60 DEG C and react for 6 h, cool to room temperature, filter, distill at 60 DEG C under reduced pressure for 3 h, wash with deionized water for three times (500 ml each time), and vacuum dry at 50 DEG C for 12 h to obtain pentaerythritol epoxy compound;

[0038] S2: Under nitrogen protection, 500 ml of DMF, 0.1 mol of the pentaerythritol epoxy compound and 0.3 mol of dodecylamine were sequentially added into a reactor, stirred and uniformly mixed, heated to 80°C, then 30 ml of triethylamine was added, reacted for 6 h, cooled to room temperature, distilled at 80°C under reduced pressure for 2 h, washed with deionized water three times (500 ml each time), and vacuum dried at 70°C for 8 h to obtain the long-chain alkyl-modified pentaerythritol compound;

[0039] S3: Under nitrogen protection, 250 ml of toluene, 50 g of the long-chain alkyl-modified pentaerythritol compound and 10 g of the hydroxyl-terminated phenyl silicone oil were added into a reactor, stirred and uniformly mixed, heated to 55°C, then 1 g of p-toluenesulfonic acid was added, reacted for 4 h, ice-bath cooled, 300 ml of n-hexane was added, stirred, precipitated, filtered, washed with 5 wt% NaHCO3 solution until neutral, then washed with saturated brine three times (200 ml each time), and vacuum dried at 70°C for 12 h to obtain the lubricant.

[0040] Example 2: Preparation of a lubricant

[0041] S1: 1000 ml of DMF, 200 g of pentaerythritol tetraoleate and 8 g of strong acid cation exchange resin were sequentially added into a reactor, stirred and heated to 50°C, 52 g of formic acid and 130 g of H2O2 solution (30 wt%) were simultaneously added dropwise, 70 min after the dropwise addition was completed, the temperature was increased to 65°C, reacted for 5 h, cooled to room temperature, filtered, distilled at 60°C under reduced pressure for 3 h, washed with deionized water three times (500 ml each time), and vacuum dried at 50°C for 12 h to obtain the pentaerythritol epoxy compound;

[0042] S2: Under nitrogen protection, 500 ml of DMF, 0.1 mol of the pentaerythritol epoxy compound and 0.31 mol of dodecylamine were sequentially added into a reactor, stirred and uniformly mixed, heated to 85°C, then 30 ml of triethylamine was added, reacted for 5 h, cooled to room temperature, distilled at 80°C under reduced pressure for 2 h, washed with deionized water three times (500 ml each time), and vacuum dried at 70°C for 8 h to obtain the long-chain alkyl-modified pentaerythritol compound;

[0043] S3: Under nitrogen protection, 250 ml of toluene, 60 g of the long-chain alkyl-modified pentaerythritol compound and 10 g of the hydroxyl-terminated phenyl silicone oil were added into a reactor, stirred and uniformly mixed, heated to 60°C, then 1 g of p-toluenesulfonic acid was added, reacted for 4 h, ice-bath cooled, 300 ml of n-hexane was added, stirred, precipitated, filtered, washed with 5 wt% NaHCO3 solution until neutral, then washed with saturated brine three times (200 ml each time), and vacuum dried at 70°C for 12 h to obtain the lubricant.

[0044] Example 3: Preparation of a lubricant

[0045] S1: 1000 ml of DMF, 200 g of pentaerythritol tetraoleate, and 9 g of strong acid cation exchange resin were added to the reactor in sequence, and the temperature was raised to 50°C with stirring. 60 g of formic acid and 150 g of H2O2 solution (30 wt%) were added dropwise simultaneously over 80 min. The temperature was raised to 65°C for reaction for 4 h, then cooled to room temperature, filtered, and distilled under reduced pressure at 60°C for 3 h. The mixture was washed three times with deionized water (500 ml each time), and dried under vacuum at 50°C for 12 h to obtain pentaerythritol epoxy compound.

[0046] S2: Under nitrogen protection, 500 ml of DMF, 0.1 mol of pentaerythritol epoxy compound and 0.32 mol of dodecylamine were added to the reactor in sequence, stirred and mixed, and the temperature was raised to 90°C. Then, 30 ml of triethylamine was added and reacted for 4 h. The mixture was cooled to room temperature and distilled under reduced pressure at 80°C for 2 h. The mixture was washed three times with deionized water (500 ml each time) and dried under vacuum at 70°C for 8 h to obtain a long-chain alkyl-modified pentaerythritol compound.

[0047] S3: Under nitrogen protection, add 250 ml of toluene, 70 g of long-chain alkyl-modified pentaerythritol compound, and 10 g of hydroxyl-terminated phenyl silicone oil to the reactor, stir and mix, heat to 65°C, then add 1 g of p-toluenesulfonic acid, react for 4 hours, cool in an ice bath, add 300 ml of n-hexane, stir, precipitate, filter, wash with 5 wt% NaHCO3 solution until neutral, then wash three times with saturated brine (200 ml each time), and dry in a vacuum at 70°C for 12 hours to obtain a lubricant.

[0048] Example 4 Preparation of compatibilizer:

[0049] S1: Under nitrogen protection, 1000 ml of toluene, 1.5 mol of glycidyl methacrylate, 1 mol of maleic anhydride, and 3.5 g of AIBN were added to the reactor, stirred and mixed, and the temperature was raised to 70°C for 5 h. 1.2 mol of octadecyl methacrylate and 2 g of AIBN were added, and the reaction was continued for 3 h. The mixture was immediately cooled to ≤10°C in an ice bath, and 0.5 g of hydroquinone was added to terminate the reaction. The mixture was slowly poured into 2000 ml of methanol pre-cooled at -20°C and stirred at 500 rpm to induce the precipitation of fibrous polymer. The mixture was allowed to stand for 1 h to complete phase separation and filtered to obtain a crude product. The crude product was Soxhlet extracted with 1000 ml of a mixed solvent of acetone / ethanol (7:3 v / v) in a water bath at 65°C for 24 h to completely remove unreacted monomers. After filtration, the filter cake was rinsed with 200 ml of cold methanol and dried in vacuo at 60°C for 10 h to obtain a random copolymer. The reaction equation is shown below:

[0050] ;

[0051] S2: Under nitrogen protection, 800 ml of anhydrous toluene, 100 g of the random copolymer, 10 g of 4-mercaptophenyl boronic acid pinacol ester, 8.2 g of triethylamine were added into a reactor, stirred and mixed, then heated to 80°C for 6 h (5 wt% triethylamine in tetrahydrofuran was used to maintain the pH of the system >10 during the reaction), then cooled to room temperature, and the reaction solution was distilled under reduced pressure at 80°C until no distillate was obtained. The residue was dissolved in 500 ml of THF and then dropped into 2000 ml of n-hexane to precipitate the sediment, which was filtered and dried under vacuum at 60°C for 12 h to obtain the compatilizer. The reaction equation is shown as follows:

[0052] ;

[0053] Example 5: Preparation of PVC / ABS modified material

[0054] S1: PVC: 600 g, ABS: 200 g, plasticizer (dioctyl phthalate): 60 g, antioxidant (antioxidant 1076): 20 g, stabilizer (JX-181 organic tin heat stabilizer): 20 g, lubricant (prepared in Example 1): 30 g, compatilizer (prepared in Example 4): 20 g were weighed.

[0055] S2: The PVC, ABS, plasticizer, stabilizer, antioxidant were added into a high-speed mixer, mixed at 85°C for 30 min, heated to 100°C, and then the lubricant and compatilizer were added and mixed, pre-plasticized for 30 min, and then transported to a twin-screw extruder for extrusion and mixing. The screw speed of the twin-screw extruder was 10 r / s, the conveying section temperature was 130°C, the melting section temperature was 175°C, the mixing rubber section temperature was 180°C, and the homogenization section temperature was 160°C. After air cooling and sieving, the PVC / ABS modified material was obtained.

[0056] Example 6: Preparation of PVC / ABS modified material

[0057] S1: PVC: 650 g, ABS: 300 g, plasticizer (dibutyl phthalate): 90 g, antioxidant (antioxidant 1010): 25 g, stabilizer (JX-107 reverse ester tin heat stabilizer): 25 g, lubricant (prepared in Example 2): 40 g, compatilizer (prepared in Example 4): 30 g were weighed.

[0058] S2: PVC, ABS, plasticizer, stabilizer, antioxidant were added into high-speed mixer, mixed at 90℃ for 25 min, heated to 110℃, added lubricant, compatibilizer, mixed, pre-plasticized for 25 min, transported to twin-screw extruder for extrusion, plasticization and mixing, the screw rotation speed of the twin-screw extruder was 10 r / s, the conveying section temperature of the twin-screw extruder was 120℃, the melting section temperature was 170℃, the mixing rubber section temperature was 180℃, the homogenization section temperature was 160℃, air-cooled and sieved, to obtain the PVC / ABS modified material.

[0059] Example 7 Preparation of PVC / ABS modified material:

[0060] S1: PVC 700g, ABS 400g, plasticizer (diisononyl phthalate) 120g, antioxidant (antioxidant 1010) 30g, stabilizer (JT-101 thiol antimony heat stabilizer) 30g, lubricant (prepared in Example 3) 50g, compatibilizer (prepared in Example 4) 40g were weighed.

[0061] S2: PVC, ABS, plasticizer, stabilizer, antioxidant were added into high-speed mixer, mixed at 95℃ for 20 min, heated to 115℃, added lubricant, compatibilizer, mixed, pre-plasticized for 20 min, transported to twin-screw extruder for extrusion, plasticization and mixing, the screw rotation speed of the twin-screw extruder was 15 r / s, the conveying section temperature of the twin-screw extruder was 130℃, the melting section temperature was 170℃, the mixing rubber section temperature was 180℃, the homogenization section temperature was 160℃, air-cooled and sieved, to obtain the PVC / ABS modified material.

[0062] Comparative Example 1

[0063] The raw material composition and process of the PVC / ABS modified material were basically the same as those of Example 6, except that the lubricant was replaced by an equal amount of lubricant prepared by the following method:

[0064] The preparation method of the lubricant was basically the same as that of Example 2, except that the pentaerythritol tetraoleate in step S1 was replaced by an equal amount of pentaerythritol dioleate.

[0065] Comparative Example 2

[0066] The raw material composition and process of the PVC / ABS modified material were basically the same as those of Example 6, except that the lubricant was replaced by an equal amount of lubricant prepared by the following method:

[0067] The preparation method of the lubricant was basically the same as that of Example 2, except that the pentaerythritol tetraoleate in step S1 was replaced by an equal amount of pentaerythritol tetraacrylate.

[0068] Comparative Example 3

[0069] The raw material composition and process of the PVC / ABS modified material are basically the same as those of Example 6, except that the lubricant is replaced with an equal weight of a lubricant prepared as follows:

[0070] The preparation method of the lubricant is basically the same as that of Example 2, except that the dodecylamine in step S2 is replaced with an equal molar amount of n-butylamine.

[0071] Comparative Example 4

[0072] The raw material composition and process of the PVC / ABS modified material are basically the same as those of Example 6, except that the lubricant is replaced with an equal weight of a lubricant prepared as follows:

[0073] The preparation method of the lubricant is basically the same as that of Example 2, except that the hydroxyl-terminated phenyl silicone oil in step S3 is replaced with an equal weight of hydroxyl-terminated polydimethylsiloxane.

[0074] Comparative Example 5

[0075] The raw material composition and process of the PVC / ABS modified material are basically the same as those of Example 6, except that the compatibilizer is replaced with an equal weight of a compatibilizer prepared as follows:

[0076] The preparation method of the compatibilizer is basically the same as that of Example 4, except that the methacrylate octadecyl ester in step A1 is replaced with an equal molar amount of methacrylate dodecyl ester.

[0077] Comparative Example 6

[0078] The raw material composition and process of the PVC / ABS modified material are basically the same as those of Example 6, except that the compatibilizer is replaced with an equal weight of a compatibilizer prepared as follows:

[0079] The preparation method of the compatibilizer is basically the same as that of Example 4, except that the 4-mercaptophenyl boronic acid pinacol ester in step A2 is replaced with an equal weight of thiophenol.

[0080] The polyvinyl chloride used in Examples 5-7 and Comparative Examples 1-6 is SG-5, which is purchased from Chengdu Jinlushi Resin Co., Ltd.; the ABS is ABS-3513, which is produced by SINOPEC Shanghai Gaoqiao Petrochemical Co., Ltd.; the hydroxyl-terminated phenyl silicone oil has a CAS: 63148-59-4 and a phenyl content of 10%; the hydroxyl-terminated polydimethylsiloxane has a viscosity of 3500 cSt and is purchased from Shanghai Aldrin Biochemical Technology Co., Ltd.; and the strong acid cation exchange resin is a polymer of divinylbenzene and sodium vinylbenzene sulfonate, which is Amberlite® IMAC HP1110 resin.

[0081] The PVC / ABS modified materials prepared in Examples 5-7 and Comparative Examples 1-6 were subjected to tensile strength test according to GB / T1040.2-2006, temperature 23℃, 1B type sample, tensile speed 100mm / min; melt flow rate test according to GB / T 3682.1-2018; notched impact strength test according to GB / T 1843-2008; heat distortion temperature test according to GB / T 1634.1-2004 "Determination of the heat distortion temperature of plastics - Part 1: General test method". The test results are shown in Table 1.

[0082] Table 1 Performance test table of PVC / ABS modified material

[0083]

[0084] As can be seen from Table 1 Examples 5, 6, 7, the PVC / ABS modified material prepared by the present application has excellent melt flow rate, tensile strength and notched impact strength.

[0085] The long alkyl chain (hydrophobic flexible chain) in the lubricant prepared by the present application provides lubricity, the silicone oil chain (with hydrophobicity and thermal stability) enhances the high temperature resistance, the long alkyl chain can be inserted between the PVC molecular chains, weakening the secondary bond force, reducing the melt viscosity and improving the processing fluidity; the silicone oil chain segment migrates to the surface to form a low friction film, reducing the adhesion to the processing equipment. The amino group contained in the lubricant forms a hydrogen bond with the Cl atom of PVC, and the silicone oil chain segment has a certain compatibility with the styrene in ABS, which can reduce the interfacial energy by diffusing to the two-phase interface, and improve the interfacial bonding force; at the same time, the flexible chain structure helps to disperse local stress and reduce stress concentration phenomenon; the steric hindrance of the pentaerythritol skeleton and the steric hindrance of the silicone oil chain inhibit the exudation of the lubricant to the surface, maintaining long-term performance.

[0086] The anhydride group in the compatibilizer prepared by the present application can be hydrolyzed to carboxylic acid, which forms a hydrogen bond or a dipole interaction with the polar Cl atom of PVC or the nitrile group in ABS, thereby enhancing the interfacial compatibility; the introduced long alkyl chain provides flexible spacing and physically entangles with the PVC / ABS molecular chain, forming a network structure similar to "flexible bridge", which disperses stress through deformation under external force, which can improve the tensile strength and impact toughness. The introduced phenylboronic acid ester group has dynamic reversible characteristics and can undergo reversible rupture and recombination at the melting processing temperature. This characteristic can temporarily reduce the intermolecular force, significantly reduce the melt viscosity, thereby improving the melt flow rate, and making the composite material more easily processed and formed.

[0087] The above is only the preferred embodiment of the present application, and is not used to limit the present application; but for the ordinary skilled in the art without departing from the scope of the present application technical scheme, can use the above disclosed technical content and make some changes, modifications and evolution of equivalent changes, are equivalent embodiments of the present application; at the same time, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present application, still belong to the protection scope of the present application technical scheme.

Claims

1. A PVC / ABS modified material, characterized in that, The raw materials include the following weight parts: PVC: 60-70 parts, ABS: 20-40 parts, plasticizer: 6-12 parts, antioxidant: 2-3 parts, stabilizer: 2-3 parts, lubricant: 3-5 parts, compatibilizer: 2-4 parts; The lubricant is prepared by the following method: S1: pentaerythritol tetraoleate reacts under the action of formic acid and H2O2 solution to generate pentaerythritol epoxy compound; S2: pentaerythritol epoxy compound reacts with dodecylamine to generate long-chain alkyl modified pentaerythritol compound; S3: long-chain alkyl modified pentaerythritol compound reacts with hydroxyl-terminated phenyl silicone oil to generate lubricant; The compatibilizer is prepared by the following method: A1: glycidyl methacrylate, maleic anhydride, and stearyl methacrylate react under the action of initiator AIBN to generate random copolymer; A2: random copolymer reacts with 4-mercaptobenzoic acid farnesol ester to generate compatibilizer.

2. The PVC / ABS modified material according to claim 1, characterized in that, In step S1, the mass ratio of pentaerythritol tetraoleate, formic acid, and H2O2 solution is 20:(4.8-6):(12-15).

3. The PVC / ABS modified material according to claim 1, characterized in that, In step S2, the molar ratio of pentaerythritol epoxy compound to dodecylamine is 1:(3.0-3.2).

4. The PVC / ABS modified material according to claim 1, characterized in that, In step S3, the mass ratio of long-chain alkyl modified pentaerythritol compound to hydroxyl-terminated phenyl silicone oil is (5-7):

1.

5. The PVC / ABS modified material according to claim 1, characterized in that, In step A1, the molar ratio of glycidyl methacrylate, maleic anhydride, and stearyl methacrylate is 1.5:1:1.

2.

6. The PVC / ABS modified material according to claim 1, characterized in that, In step A2, the mass ratio of random copolymer to 4-mercaptobenzoic acid farnesol ester is 10:

1.

7. The PVC / ABS modified material according to claim 1, characterized in that, The plasticizer is one of dioctyl phthalate, dibutyl phthalate, and diisononyl phthalate.

8. The PVC / ABS modified material according to claim 1, characterized in that, The stabilizer is one of JX-181 organic tin heat stabilizer, JX-107 reverse ester tin heat stabilizer, and JT-101 mercaptan antimony heat stabilizer; the antioxidant is one of antioxidant 1076 and antioxidant 1010.

9. A process for the preparation of the PVC / ABS-modified material according to any one of claims 1 to 8, characterized in that The method includes the following steps: (1) weigh the following parts by weight: PVC: 60-70 parts, ABS: 20-40 parts, plasticizer: 6-12 parts, antioxidant: 2-3 parts, stabilizer: 2-3 parts, lubricant: 3-5 parts, compatibilizer: 2-4 parts; (2) add PVC, ABS, plasticizer, stabilizer, and antioxidant into a high-speed mixer, mix at 85-95°C for 20-30 min, heat to 100-115°C, add lubricant and compatibilizer, pre-plasticize for 20-30 min, convey to a twin-screw extruder for extrusion, air-cool, and sieve, to obtain PVC / ABS modified material.

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