1. A preparation method of an acrylate impact modifier is characterized by comprising the steps of preparing a first inner core, preparing a second inner core, preparing mixed inner core liquid, preparing shell emulsion and preparing the acrylate impact modifier;

the preparation method comprises the steps of preparing a first inner core, adding deionized water and sodium chloride into a reaction kettle, controlling the temperature of the reaction kettle to be 50-55 ℃, controlling the rotating speed of the reaction kettle to be 125rpm, then adding methyl methacrylate, butyl methacrylate, styrene and azodiisobutyronitrile, adding polysorbate and sodium dodecyl sulfate after reacting for 10-15min, adding acrylamide, ammonium persulfate and ammonium sulfite into the reaction kettle after reacting for 1-1.2h, controlling the temperature of the reaction kettle to be 40-45 ℃, controlling the rotating speed of the reaction kettle to be 70-75rpm, and continuously reacting for 0.5-1h to obtain a first inner core liquid;

preparing a second inner core, namely adding a mixed solvent, methyl methacrylate, ethyl methacrylate, styrene and dibenzoyl peroxide into a high-shear emulsifying machine, controlling the temperature of the high-shear emulsifying machine to be 60-65 ℃, controlling the rotating speed of the high-shear emulsifying machine to be 3000 plus 3200rpm, adding sodium dodecyl sulfate after high-shear for 20-25min, stopping high-shear after continuing high-shear for 1-1.5h, raising the temperature to be 70-75 ℃, adding polyvinylamine and dicumyl peroxide, reacting for 1-1.5h, starting high-shear, controlling the rotating speed of the high-shear to be 4000 plus 4200rpm, and obtaining a second inner core liquid after high-shear for 0.5-0.8 h;

the preparation of the mixed inner nuclear liquid comprises the steps of mixing the first inner nuclear liquid and the second inner nuclear liquid in a reaction kettle, and mixing for 0.5-0.8h at the temperature of 50-55 ℃, the stirring speed of 100-110rpm to obtain the mixed inner nuclear liquid;

and the shell emulsion is prepared by adding deionized water into a reaction kettle, controlling the temperature of the reaction kettle to be 45-50 ℃, controlling the rotating speed to be 80-85rpm, then adding allyl alcohol, styrene, propyl methacrylate, styrenated phenol and sodium stearate, stopping stirring after reacting for 0.2-0.5h, and continuing to react for 0.4-0.6h to obtain the shell emulsion.

2. The method of claim 1, wherein the raw materials in the step of preparing the first core comprise, by weight, 70-80 parts of deionized water, 0.2-0.4 part of sodium chloride, 7.5-8 parts of methyl methacrylate, 5.2-5.5 parts of butyl methacrylate, 6.5-7 parts of styrene, 0.5-0.8 part of azobisisobutyronitrile, 7-8 parts of polysorbate, 5-6 parts of sodium dodecyl sulfate, 2kg of acrylamide, 1-1.5 parts of ammonium persulfate, and 0.5-1 part of ammonium sulfite.

3. The method as claimed in claim 1, wherein the first core liquid has an average particle size of 180-190 nm.

4. The method of claim 1, wherein the raw materials in the step of preparing the second core comprise, in parts by weight, 80 to 90 parts of mixed solvent, 6 to 7 parts of methyl methacrylate, 5 to 6 parts of ethyl methacrylate, 9 to 10 parts of styrene, 1 to 1.5 parts of dibenzoyl peroxide, 3.5 to 4 parts of sodium dodecylsulfonate, 0.05 to 0.08 part of polyvinylamine, and 0.5 to 0.8 part of dicumyl peroxide.

5. The method of claim 1, wherein the mixed solvent in the step of preparing the second core is a mixed solvent of NMP and deionized water, and the volume ratio of NMP to deionized water is 1:3.

6. The method as claimed in claim 1, wherein the average particle size of the second core in the second core liquid is 125-135 nm.

Background

The acrylic ester impact modifier is a high-quality and environment-friendly plastic modifier, is mainly used for polyvinyl chloride hard products such as pipe fittings, plastic-steel doors and windows, plates, containers and the like, and generally takes a cross-linked n-butyl acrylate polymer as a core and a methacrylate polymer with good compatibility with polyvinyl chloride as a shell to form a core/shell structure. The acrylate impact modifier is dispersed in the polyvinyl chloride continuous phase matrix in a particle form, when the polyvinyl chloride is impacted by external force, the polyvinyl chloride generates tiny cracks to affect elastic particles of the acrylate impact modifier, so that the polyvinyl chloride is compressed and deformed, the impact energy is absorbed, the continuous development of the cracks is prevented, and the impact strength of the material is improved. Meanwhile, the acrylic ester impact modifier can also endow the polyvinyl chloride product with good processability and weather resistance, so the acrylic ester impact modifier is particularly suitable for outdoor products and is the polyvinyl chloride toughening modifier with the most excellent comprehensive performance at present.

However, the addition of the acrylate impact modifier may affect the toughness, flexural strength and tensile strength of polyvinyl chloride, and although the toughness, flexural strength and tensile strength of polyvinyl chloride may be improved by adding other additives, the addition of too much of an additive may affect the weather resistance of chlorinated polyvinyl chloride; furthermore, the acrylate impact modifier and other additives affect the transparency of the polyvinyl chloride, and the more the amount of the impact modifier added, the greater the impact on the transparency of the polyvinyl chloride.

Patent CN104231151B discloses a large-particle size acrylate impact modifier for polyvinyl chloride and a preparation method thereof, wherein a seed emulsion polymerization process is adopted, polyvinyl alcohol is used as a protective colloid, a nucleation layer is seed emulsion composed of butyl acrylate, isobornyl methacrylate, methyl methacrylate and a crosslinking agent, and a shell layer is formed by coating butyl acrylate, styrene, isobornyl methacrylate, methyl methacrylate and the crosslinking agent. The patent has the following defects: the addition of the large-particle size acrylate impact modifier can affect the toughness, bending strength and tensile strength of the polyvinyl chloride.

Patent CN110734617A discloses a weather resistant acrylate impact modifier, which comprises the following components in percentage by mass: 65-95.5% of acrylate core-shell graft copolymer, 3-33.5% of processing aid, 0.5% of phosphoric acid and 1% of white oil, wherein the acrylate core-shell graft copolymer consists of a core part and a shell part, the core part is an acrylate elastomer, and the weight percentage content of the acrylate elastomer in the acrylate core-shell graft copolymer is more than 80%. The patent has the following defects: the addition of the weatherable acrylate impact modifier may affect the transparency of the polyvinyl chloride.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a preparation method of an acrylate impact modifier, which realizes the following purposes: the impact resistance of the polyvinyl chloride is improved, the toughness, the bending strength, the tensile strength, the folding whitening resistance and the transparency of the polyvinyl chloride are improved, and meanwhile, the dosage of other additives can be reduced, and the influence of the other additives on the transparency of the polyvinyl chloride is avoided.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a preparation method of the acrylate impact modifier comprises the steps of preparing a first inner core, preparing a second inner core, preparing mixed inner core liquid, preparing shell emulsion and preparing the acrylate impact modifier.

The preparation method comprises the steps of preparing a first inner core, adding deionized water and sodium chloride into a reaction kettle, controlling the temperature of the reaction kettle to be 50-55 ℃, controlling the rotating speed of the reaction kettle to be 125rpm, then adding methyl methacrylate, butyl methacrylate, styrene and azodiisobutyronitrile, adding polysorbate and sodium dodecyl sulfate after reacting for 10-15min, adding acrylamide, ammonium persulfate and ammonium sulfite into the reaction kettle after reacting for 1-1.2h, controlling the temperature of the reaction kettle to be 40-45 ℃, controlling the rotating speed of the reaction kettle to be 70-75rpm, and continuously reacting for 0.5-1h to obtain a first inner core liquid.

The raw materials in the step of preparing the first core comprise, by weight, 70-80 parts of deionized water, 0.2-0.4 part of sodium chloride, 7.5-8 parts of methyl methacrylate, 5.2-5.5 parts of butyl methacrylate, 6.5-7 parts of styrene, 0.5-0.8 part of azobisisobutyronitrile, 7-8 parts of polysorbate, 5-6 parts of sodium dodecyl sulfate, 2kg of acrylamide, 1-1.5 parts of ammonium persulfate and 0.5-1 part of ammonium sulfite.

The average particle size of the first core in the first core liquid is 180-190 nm.

The preparation method comprises the steps of preparing a second inner core, adding a mixed solvent, methyl methacrylate, ethyl methacrylate, styrene and dibenzoyl peroxide into a high-shear emulsifying machine, controlling the temperature of the high-shear emulsifying machine to be 60-65 ℃, controlling the rotating speed of the high-shear emulsifying machine to be 3000 plus 3200rpm, adding sodium dodecyl sulfate after high-shear for 20-25min, stopping high-shear after continuing high-shear for 1-1.5h, increasing the temperature to be 70-75 ℃, adding polyvinylamine and dicumyl peroxide, reacting for 1-1.5h, starting high-shear, controlling the rotating speed of high-shear to be 4000 plus 4200rpm, and obtaining a second inner core liquid after high-shear for 0.5-0.8 h.

The raw materials in the step of preparing the second inner core comprise, by weight, 80-90 parts of a mixed solvent, 6-7 parts of methyl methacrylate, 5-6 parts of ethyl methacrylate, 9-10 parts of styrene, 1-1.5 parts of dibenzoyl peroxide, 3.5-4 parts of sodium dodecyl sulfate, 0.05-0.08 part of polyvinylamine and 0.5-0.8 part of dicumyl peroxide.

The mixed solvent is a mixed solvent of NMP and deionized water, and the volume ratio of the NMP to the deionized water is 1:3.

The average particle size of the second inner core in the second inner core liquid is 125-135 nm.

The preparation of the mixed inner nuclear liquid comprises the steps of mixing the first inner nuclear liquid and the second inner nuclear liquid in a reaction kettle, and mixing for 0.5-0.8h at the temperature of 50-55 ℃ and the stirring speed of 100-110rpm to obtain the mixed inner nuclear liquid.

In the step of preparing the mixed core liquid, the mass ratio of the first core liquid to the second core liquid is 10-15: 20-25.

And the shell emulsion is prepared by adding deionized water into a reaction kettle, controlling the temperature of the reaction kettle to be 45-50 ℃, controlling the rotating speed to be 80-85rpm, then adding allyl alcohol, styrene, propyl methacrylate, styrenated phenol and sodium stearate, stopping stirring after reacting for 0.2-0.5h, and continuing to react for 0.4-0.6h to obtain the shell emulsion.

The raw materials in the step of preparing the shell emulsion comprise, by weight, 50-55 parts of deionized water, 3-3.5 parts of allyl alcohol, 12.5-13 parts of styrene, 6-6.5 parts of propyl methacrylate, 2-2.5 parts of styrenated phenol and 6-6.5 parts of sodium stearate.

The acrylate impact modifier is prepared by adding shell emulsion and mixed core liquid into a reaction kettle, then adding dibenzoyl peroxide and sodium dodecyl benzene sulfonate, controlling the temperature of the reaction kettle to be 45-50 ℃, controlling the rotating speed to be 30-35rpm, continuously reacting for 2-3.5h, cooling to room temperature, washing the polymer obtained by the reaction with deionized water, and drying to obtain the acrylate impact modifier.

The raw materials in the step of the acrylate impact modifier comprise, by weight, 40-45 parts of shell emulsion, 30-35 parts of mixed core liquid, 1.7-2 parts of dibenzoyl peroxide and 2.7-3 parts of sodium dodecyl benzene sulfonate.

The average particle size of the acrylate impact modifier is 295-300 nm.

Compared with the prior art, the invention has the beneficial effects that:

(1) the method for preparing the acrylic ester impact modifier of the invention can improve the impact resistance of polyvinyl chloride by preparing the first inner core and the second inner core, and the acrylic acid of the invention is used for preparing the acrylic ester impact modifierThe notch impact strength of the polyvinyl chloride prepared by the ester impact modifier is 15.5-16.8kJ/m²；

(2) The preparation method of the acrylate impact modifier can improve the toughness, tensile strength and bending strength of polyvinyl chloride by preparing the first inner core and the second inner core, the elongation at break of the polyvinyl chloride prepared by the acrylate impact modifier is 357 and 385 percent, the tensile strength is 53.2-56.9MPa, and the bending strength is 93.4-98.2 MPa;

(3) according to the preparation method of the acrylate impact modifier, the first inner core and the second inner core are prepared, the average particle sizes of the first inner core and the second inner core are different, the light transmittance of polyvinyl chloride can be improved, and the haze of the polyvinyl chloride is reduced, wherein the light transmittance of the polyvinyl chloride prepared from the acrylate impact modifier is 87.4-89.3%, and the haze is 5.8-6.7%;

(4) the preparation method of the acrylate impact modifier does not need to prepare in nitrogen atmosphere, can simplify the reaction process, has stable reaction products and improves the reaction safety.

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present invention, specific embodiments of the present invention will now be described.

Example 1

A preparation method of an acrylate impact modifier specifically comprises the following steps:

1. preparing a first inner core: adding 70kg of deionized water and 0.2kg of sodium chloride into a reaction kettle, controlling the temperature of the reaction kettle to 50 ℃, controlling the rotating speed of the reaction kettle to 120rpm, then adding 7.5kg of methyl methacrylate, 5.2kg of butyl methacrylate, 6.5kg of styrene and 0.5kg of azodiisobutyronitrile, adding 7kg of polysorbate and 5kg of sodium dodecyl sulfate after reacting for 10min, adding 2kg of acrylamide, 1kg of ammonium persulfate and 0.5kg of ammonium sulfite into the reaction kettle after reacting for 1h, controlling the temperature of the reaction kettle to 40 ℃, controlling the rotating speed of the reaction kettle to 70rpm, and continuously reacting for 0.5h to obtain a first inner core liquid.

The average particle size of the first inner core in the first inner core liquid is 180 nm.

2. Preparing a second inner core: adding 80kg of mixed solvent, 6kg of methyl methacrylate, 5kg of ethyl methacrylate, 9kg of styrene and 1kg of dibenzoyl peroxide into a high-shear emulsifying machine, controlling the temperature of the high-shear emulsifying machine to 60 ℃, controlling the rotating speed of the high-shear emulsifying machine to 3000rpm, adding 3.5kg of sodium dodecyl sulfate after high-shear for 20min, stopping high-shear after continuing high-shear for 1h, increasing the temperature to 70 ℃, adding 0.05kg of polyvinylamine and 0.5kg of dicumyl peroxide, starting high-shear after reacting for 1h, controlling the rotating speed of high-shear to 4000rpm, and obtaining a second inner core liquid after high-shear for 0.5 h.

The mixed solvent is a mixed solvent of NMP and deionized water, and the volume ratio of the NMP to the deionized water is 1:3.

The average particle size of the second inner core in the second inner core liquid is 125 nm.

3. Preparing mixed inner core liquid: 10kg of the first core liquid and 20kg of the second core liquid were mixed in a reaction vessel at a temperature of 50 ℃ and a stirring speed of 100rpm for 0.5 hour to obtain a mixed core liquid.

4. Preparing a shell emulsion: adding 50kg of deionized water into a reaction kettle, controlling the temperature of the reaction kettle to 45 ℃ and the rotating speed to 80rpm, then adding 3kg of allyl alcohol, 12.5kg of styrene, 6kg of propyl methacrylate, 2kg of styrenated phenol and 6kg of sodium stearate, stopping stirring after reacting for 0.2h, and continuing to react for 0.4h to obtain the shell emulsion.

5. Preparation of acrylate impact modifier: adding 40kg of shell emulsion and 30kg of mixed core liquid into a reaction kettle, then adding 1.7kg of dibenzoyl peroxide and 2.7kg of sodium dodecyl benzene sulfonate, controlling the temperature of the reaction kettle to 45 ℃, controlling the rotating speed to 30rpm, continuing to react for 2h, cooling to room temperature, washing the polymer obtained by the reaction with deionized water, and drying to obtain the acrylate impact modifier.

The average particle size of the acrylate impact modifier is 295 nm.

Example 2

A preparation method of an acrylate impact modifier specifically comprises the following steps:

1. preparing a first inner core: adding 75kg of deionized water and 0.3kg of sodium chloride into a reaction kettle, controlling the temperature of the reaction kettle to 52 ℃, controlling the rotating speed of the reaction kettle to 122rpm, then adding 7.7kg of methyl methacrylate, 5.3kg of butyl methacrylate, 6.7kg of styrene and 0.6kg of azodiisobutyronitrile, adding 7.5kg of polysorbate and 5.5kg of sodium dodecyl sulfate after reacting for 12min, adding 2.2kg of acrylamide, 1.2kg of ammonium persulfate and 0.7kg of ammonium sulfite into the reaction kettle after reacting for 1.1h, controlling the temperature of the reaction kettle to 42 ℃, controlling the rotating speed of the reaction kettle to 72rpm, and continuously reacting for 0.7h to obtain a first inner core liquid.

The average particle diameter of the first core in the first core liquid is 185 nm.

2. Preparing a second inner core: adding 85kg of mixed solvent, 6.5kg of methyl methacrylate, 5.5kg of ethyl methacrylate, 9.5kg of styrene and 1.2kg of dibenzoyl peroxide into a high-shear emulsifying machine, controlling the temperature of the high-shear emulsifying machine to be 62 ℃, controlling the rotating speed of the high-shear emulsifying machine to be 3100rpm, adding 3.7kg of sodium dodecyl sulfate after 22min of high shear, continuing to perform high shear for 1.2h, stopping the high shear, increasing the temperature to 72 ℃, adding 0.07kg of polyvinylamine and 0.7kg of dicumyl peroxide, reacting for 1.2h, starting the high shear, controlling the rotating speed of the high shear to be 4100rpm, and performing high shear for 0.7h to obtain a second inner core liquid.

The mixed solvent is a mixed solvent of NMP and deionized water, and the volume ratio of the NMP to the deionized water is 1: 3.5.

The average particle diameter of the second core in the second core liquid is 130 nm.

3. Preparing mixed inner core liquid: 12kg of the first core liquid and 22kg of the second core liquid were mixed in a reaction vessel at a temperature of 52 ℃ and a stirring speed of 105rpm for 0.7 hour to obtain a mixed core liquid.

4. Preparing a shell emulsion: adding 52kg of deionized water into a reaction kettle, controlling the temperature of the reaction kettle to 47 ℃ and the rotating speed to 82rpm, then adding 3.2kg of allyl alcohol, 12.7kg of styrene, 6.2kg of propyl methacrylate, 2.2kg of styrenated phenol and 6.2kg of sodium stearate, stopping stirring after reacting for 0.3h, and continuing to react for 0.5h to obtain the shell emulsion.

5. Preparation of acrylate impact modifier: adding 42kg of shell emulsion and 32kg of mixed core liquid into a reaction kettle, then adding 1.8kg of dibenzoyl peroxide and 2.8kg of sodium dodecyl benzene sulfonate, controlling the temperature of the reaction kettle to 47 ℃ and the rotating speed to 32rpm, continuing to react for 2.2h, cooling to room temperature, washing the polymer obtained by the reaction with deionized water, and drying to obtain the acrylate impact modifier.

The average particle size of the acrylate impact modifier was 297 nm.

Example 3

A preparation method of an acrylate impact modifier specifically comprises the following steps:

1. preparing a first inner core: adding 80kg of deionized water and 0.4kg of sodium chloride into a reaction kettle, controlling the temperature of the reaction kettle to 55 ℃, controlling the rotating speed of the reaction kettle to 125rpm, then adding 8kg of methyl methacrylate, 5.5kg of butyl methacrylate, 7kg of styrene and 0.8kg of azodiisobutyronitrile, adding 8kg of polysorbate and 6kg of sodium dodecyl sulfate after reacting for 15min, adding 2.5kg of acrylamide, 1.5kg of ammonium persulfate and 1kg of ammonium sulfite into the reaction kettle after reacting for 1.2h, controlling the temperature of the reaction kettle to 45 ℃, controlling the rotating speed of the reaction kettle to 75rpm, and continuously reacting for 1h to obtain a first inner core liquid.

The average particle size of the first inner core in the first inner core liquid is 190 nm.

2. Preparing a second inner core: adding 90kg of mixed solvent, 7kg of methyl methacrylate, 6kg of ethyl methacrylate, 10kg of styrene and 1.5kg of dibenzoyl peroxide into a high-shear emulsifying machine, controlling the temperature of the high-shear emulsifying machine to 65 ℃, controlling the rotating speed of the high-shear emulsifying machine to 3200rpm, adding 4kg of sodium dodecyl sulfate after high-shear for 25min, stopping high-shear after continuing high-shear for 1.5h, increasing the temperature to 75 ℃, adding 0.08kg of polyvinylamine and 0.8kg of dicumyl peroxide, starting high-shear after reacting for 1.5h, controlling the rotating speed of high-shear to 4200rpm, and obtaining a second inner core liquid after high-shear for 0.8 h.

The mixed solvent is a mixed solvent of NMP and deionized water, and the volume ratio of the NMP to the deionized water is 1: 4.

The average particle size of the second inner core in the second inner core liquid is 135 nm.

3. Preparing mixed inner core liquid: 15kg of the first core liquid and 25kg of the second core liquid were mixed in a reaction vessel at a temperature of 55 ℃ and a stirring speed of 110rpm for 0.8h to obtain a mixed core liquid.

4. Preparing a shell emulsion: adding 55kg of deionized water into a reaction kettle, controlling the temperature of the reaction kettle to 50 ℃ and the rotating speed to 85rpm, then adding 3.5kg of allyl alcohol, 13kg of styrene, 6.5kg of propyl methacrylate, 2.5kg of styrenated phenol and 6.5kg of sodium stearate, stopping stirring after reacting for 0.5h, and continuing to react for 0.6h to obtain the shell emulsion.

5. Preparation of acrylate impact modifier: adding 45kg of shell emulsion and 35kg of mixed core liquid into a reaction kettle, then adding 2kg of dibenzoyl peroxide and 3kg of sodium dodecyl benzene sulfonate, controlling the temperature of the reaction kettle to 50 ℃, controlling the rotating speed to 35rpm, continuously reacting for 2.5h, cooling to room temperature, washing the polymer obtained by the reaction with deionized water, and drying to obtain the acrylate impact modifier.

The average particle size of the acrylate impact modifier is 300 nm.

Example 4

The preparation of the acrylic impact modifier described in examples 1-3 was used while setting comparative tests 1-3 for comparison.

Comparative example 1: the method of preparing the acrylate impact modifier described in example 1 was used except that: and omitting the step of preparing a first inner core, namely preparing shell emulsion after preparing a second inner core, then adding 40kg of shell emulsion and 30kg of second inner core liquid into a reaction kettle, then adding 1.7kg of dibenzoyl peroxide and 2.7kg of sodium dodecyl benzene sulfonate, controlling the temperature of the reaction kettle to 45 ℃, controlling the rotating speed to 30rpm, continuing to react for 2 hours, then cooling to room temperature, washing the polymer obtained by the reaction with deionized water, and drying to obtain the acrylate impact modifier.

Comparative example 2: the method of preparing the acrylate impact modifier described in example 1 was used except that: and omitting the step of preparing a second core, namely preparing shell emulsion after preparing the first core, then adding 40kg of shell emulsion and 30kg of first core liquid into a reaction kettle, then adding 1.7kg of dibenzoyl peroxide and 2.7kg of sodium dodecyl benzene sulfonate, controlling the temperature of the reaction kettle to 45 ℃, controlling the rotating speed to 30rpm, continuing to react for 2 hours, then cooling to room temperature, washing the polymer obtained by the reaction with deionized water, and drying to obtain the acrylate impact modifier.

Comparative example 3: the method of preparing the acrylate impact modifier described in example 1 was used except that: the addition of polyvinylamine was omitted in step 2.

The acrylate impact modifier prepared in examples 1 to 3 and comparative examples 1 to 3, polyvinyl chloride (manufacturer: Qingdao Haidao chemical Co., Ltd., type: HS-800) and an auxiliary agent were placed in a mixer in the proportions shown in the following Table, the temperature of the mixer was 110 ℃, the mixing speed of the mixer was 500rpm, the high-speed mixing time was 20min, and a master batch was prepared at a cooling value of 35 ℃ after completion of mixing;

and then placing the master batch in a tablet press, setting the temperature of the tablet press to be 180 ℃, then adding the mixed raw materials into the tablet press to be pressed for 10min to obtain a thin slice with the thickness of 3mm, and cooling to room temperature to obtain a test sample.

The test specimens were tested and the results were as follows:

in the performance test, the notch impact strength is tested according to the national standard GB/T1043.1-2008, the temperature is 23 ℃, the V-shaped notch is formed, the size of a sample is 80mm multiplied by 10mm multiplied by 4mm, and the depth of the notch is 2 mm; the test instrument: XJJ-50 type simply supported beam impact tester.

The elongation at break is tested according to GB/T528-2009, the clamping distance of a dumbbell-shaped sample is 25.0 +/-1.0 mm, the tensile speed of a hard material is 50mm/min, and the tensile speed of a soft material is 500 mm/min; the test instrument: MTS universal tester.

Flexural strength was tested according to GB/T9341-: the sample size is 80mm multiplied by 10mm multiplied by 4mm, and the bending speed is 2 mm/min; the test instrument: ST-S501 bending performance tester.

The tensile strength is tested according to GB/T1040.1-2018, and the tensile speed is 10 mm/min; the test instrument: MTS universal tester.

The light transmittance and haze were measured according to GB/T2410-2008, and the thickness of the test specimen was 1 mm.

All percentages used in the present invention are mass percentages unless otherwise indicated.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.