CN113462085A - High-impact-resistance transparent modified PP material and preparation method thereof - Google Patents

High-impact-resistance transparent modified PP material and preparation method thereof Download PDF

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CN113462085A
CN113462085A CN202110944547.7A CN202110944547A CN113462085A CN 113462085 A CN113462085 A CN 113462085A CN 202110944547 A CN202110944547 A CN 202110944547A CN 113462085 A CN113462085 A CN 113462085A
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modified
transparent
parts
impact
mixing
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李刚民
赵立通
王静
李丰振
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Citylong Technology Development Co ltd
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Citylong Technology Development Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/14—Copolymers of propene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/267—Magnesium carbonate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/10—Transparent films; Clear coatings; Transparent materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/24—Crystallisation aids
    • C08L2205/242—Beta spherulite nucleating agents

Abstract

The invention belongs to the field of polypropylene materials, in particular to a high-impact transparent modified PP material and a preparation method thereof, aiming at the problems of poor toughness, poor mechanical property and poor transparency in the prior art, the invention provides the following scheme, which comprises 120 parts of PP mixture, 35-39 parts of transparent nylon, 14-18 parts of connecting agent, 0.5-0.9 part of antioxidant, 0.4-0.8 part of stabilizer, 0.2-0.5 part of lubricant, 1.2-2.0 parts of transparent nucleating agent, 2-8 parts of shell powder, 1.5-3.5 parts of poly N-vinyl caprolactam-b-polycaprolactone and 15-19 parts of basic magnesium carbonate, wherein the transparent nucleating agent comprises sorbierite benzylidene derivative, organic phosphate, beta-crystal form nucleating agent NA-11 and calcium carbonate powder, and the tensile yield stress, the mechanical property and the transparency of the modified PP material are improved through various combinations, The flexural modulus, the cantilever beam impact resistance of the modified PP material is enhanced, the optical performance of the modified PP material is improved, and the light transmittance is high.

Description

High-impact-resistance transparent modified PP material and preparation method thereof
Technical Field
The invention relates to the technical field of polypropylene materials, in particular to a high-impact transparent modified PP material and a preparation method thereof.
Background
The PP resin has excellent thermal stability, cold resistance, good fluidity and chemical medium stability, and the patent with the application number of CN201910539932.6 discloses a modified PP material and a preparation method thereof.
However, the modified PP material and the preparation method thereof have some problems, such as poor product toughness, easy damage after being impacted by large force, poor mechanical properties, no compatibility with transparency while enhancing the toughness, blue appearance of the product, poor transparency when the product thickness is more than 1.8mm, low light transmittance and influence on normal use of the product.
Disclosure of Invention
Based on the problems of poor toughness, poor mechanical property, blue appearance of the product and poor transparency when the product thickness is more than 1.8mm in the prior art, the invention provides a high-impact transparent modified PP material and a preparation method thereof.
The invention provides a high-impact-resistance transparent modified PP material which comprises 120 parts of PP mixture, 35-39 parts of transparent nylon, 14-18 parts of connecting agent, 0.5-0.9 part of antioxidant, 0.4-0.8 part of stabilizer, 0.2-0.5 part of lubricant, 1.2-2.0 parts of transparent nucleating agent, 2-8 parts of shell powder, 1.5-3.5 parts of poly-N-vinyl caprolactam-b-polycaprolactone and 15-19 parts of basic magnesium carbonate, wherein the transparent nucleating agent comprises sorbierite benzylidene derivative, organic phosphate, beta crystal form nucleating agent NA-11 and calcium carbonate powder.
Preferably, the PP mixture is formed by mixing homopolymerized PP, medium impact copolymerization PP and transparent random copolymerization PP, and the dosage ratio of the homopolymerized PP to the medium impact copolymerization PP to the transparent random copolymerization PP is 2:3: 1.
Preferably, the connecting agent comprises maleic anhydride grafted polyolefin elastomer, itaconic acid, benzoyl peroxide and oxazoline functionalized styrene, and the dosage ratio of the maleic anhydride grafted polyolefin elastomer, the itaconic acid, the benzoyl peroxide and the oxazoline functionalized styrene is 4:3:2: 1.
Preferably, the dosage ratio of the sorbierite benzylidene derivative to the organic phosphate to the beta crystal form nucleating agent NA-11 to the calcium carbonate powder is 4:3:4: 1.
Preferably, the linking agent is added during the mixing and hot melting process of the PP mixture and the transparent nylon.
Preferably, the preparation method of the shell powder comprises the following steps: and (3) putting the clean shell into crushing equipment for grinding and crushing to generate crushed materials with different sizes, and then adding the crushed materials into grinding equipment for high-speed grinding until the shell powder passes through a 40-mesh sieve.
Preferably, the antioxidant comprises pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and dilauryl thiodipropionate, and the dosage ratio of the pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] to the dilauryl thiodipropionate is 2: 1.
Preferably, the stabilizer is bis-2, 2,6, 6-tetramethylpiperidinol sebacate.
Preferably, the lubricant is one or more of potassium stearate, zinc stearate and paraffin.
A preparation method of a high-impact transparent modified PP material comprises the following steps:
s1: pouring the PP mixture into a double-screw extruder, and extruding the PP mixture into a high-concentration PP material after hot melting;
s2: pouring the transparent nylon and the PP material into a haake rotor rheometer according to the proportion for mixing, raising the temperature inside the haake rotor rheometer to 140-180 ℃, then adding the connecting agent while mixing, and then continuously mixing for 20-25 minutes to prepare a primary modified PP material;
s3: adding an antioxidant, a stabilizer, a lubricant, a transparent nucleating agent, shell powder, poly-N-vinylcaprolactam-b-polycaprolactone and basic magnesium carbonate into crushing and grinding equipment according to a proportion, crushing and mixing, wherein the temperature in the crushing and grinding equipment is firstly reduced to minus, and is crushed and mixed for 5 to 8 minutes, then the temperature is quickly increased to 40 to 50 ℃, and the crushing and stirring are continued for 5 to 10 minutes to prepare an additive mixture;
s4: pouring the additive mixture into a haake rotor rheometer to be mixed with the primary modified PP material, keeping the temperature inside the haake rotor rheometer at 145-155 ℃, and mixing for 15-25 minutes to prepare a modified PP semi-finished product;
s5: and adding the modified PP semi-finished product into a double-screw extruder, controlling the temperature inside the double-screw extruder to be 180-200 ℃ and the rotating speed of a screw to be 35-45 r/min, then extruding the modified PP, cooling the modified PP, pelletizing the modified PP, and finally drying to obtain the high-impact-resistance transparent modified PP material.
The invention has the beneficial effects that:
1. transparent nylon, a connecting agent, poly-N-vinyl caprolactam-b-polycaprolactone and basic magnesium carbonate are added into the PP mixture, so that the bonding effect between the PP mixture and the transparent nylon is improved, and the structural stability is improved by using shell powder, so that the mechanical property of the modified PP material is improved;
2. the PP mixture is formed by mixing homopolymerized PP, medium impact copolymerized PP and transparent random copolymerized PP, and the transparent nylon has the characteristic of high transparency, and the transparency can be greatly improved through the transparent nucleating agent and the basic magnesium carbonate;
3. the modified PP material is transparent and milk white, the price of the used material is low, the material purchasing channels are many, and the goods source is stable;
according to the invention, the tensile yield stress and the flexural modulus of the modified PP material are improved through various combinations, the cantilever beam impact resistance of the modified PP material is enhanced, the mechanical property of the modified PP material is improved, the modified PP material is not easy to damage, the number of crystal nuclei in the modified PP material is increased rapidly by the transparent nucleating agent, the spherulites only form fine crystal grains, and when the diameter of the spherulites is smaller than the wavelength of visible light, the optical property of the modified PP material is improved, the light transmittance is high, and the transparency is increased.
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Fig. 1 is a flow chart of the present invention.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
Referring to FIG. 1, the first embodiment
The embodiment provides a high-impact transparent modified PP material, which comprises 120 parts of PP mixture, 39 parts of transparent nylon, 18 parts of connecting agent, 0.9 part of antioxidant, 0.8 part of stabilizer, 0.5 part of lubricant, 2.0 parts of transparent nucleating agent, 8 parts of shell powder, 3.5 parts of poly-N-vinyl caprolactam-b-polycaprolactone and 19 parts of basic magnesium carbonate, wherein the transparent nucleating agent comprises sorbierite benzylidene derivative, organic phosphate, beta-crystal form nucleating agent NA-11 and calcium carbonate powder, the PP mixture is formed by mixing homopolymerized PP, impact-resistant copolymerized PP and transparent random copolymerized PP, the dosage ratio of the homopolymerized PP, the impact-resistant copolymerized PP and the transparent random copolymerized PP is 2:3:1, the connecting agent comprises maleic anhydride grafted polyolefin elastomer, itaconic acid, benzoyl peroxide and oxazoline styrene, the preparation method comprises the following steps of (1) adding a connecting agent in the mixing and hot melting process of a PP mixture and transparent nylon, wherein the dosage ratio of maleic anhydride grafted polyolefin elastomer, itaconic acid, benzoyl peroxide and oxazoline functionalized polystyrene is 4:3:2:1, the dosage ratio of sorbierite benzylidene derivative, organic phosphate, beta crystal form nucleating agent NA-11 and calcium carbonate powder is 4:3:4:1, and the preparation method of shell powder comprises the following steps: putting clean shells into a crushing device for grinding and crushing to generate crushed materials with different sizes, then adding the crushed materials into a grinding device for high-speed grinding until the shell powder passes through a 40-mesh sieve, wherein the antioxidant comprises pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and dilauryl thiodipropionate, the dosage ratio of the pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] to the dilauryl thiodipropionate is 2:1, the stabilizer is bis-2, 2,6, 6-tetramethylpiperidinol sebacate, and the lubricant is one or more of potassium stearate, zinc stearate and paraffin.
A preparation method of a high-impact transparent modified PP material comprises the following steps:
s1: pouring the PP mixture into a double-screw extruder, and extruding the PP mixture into a high-concentration PP material after hot melting;
s2: pouring the transparent nylon and the PP material into a haake rotor rheometer according to the proportion for mixing, raising the temperature inside the haake rotor rheometer to 140-180 ℃, then adding the connecting agent while mixing, and then continuously mixing for 20-25 minutes to prepare a primary modified PP material;
s3: adding an antioxidant, a stabilizer, a lubricant, a transparent nucleating agent, shell powder, poly-N-vinylcaprolactam-b-polycaprolactone and basic magnesium carbonate into crushing and grinding equipment according to a proportion, crushing and mixing, wherein the temperature in the crushing and grinding equipment is firstly reduced to minus, and is crushed and mixed for 5 to 8 minutes, then the temperature is quickly increased to 40 to 50 ℃, and the crushing and stirring are continued for 5 to 10 minutes to prepare an additive mixture;
s4: pouring the additive mixture into a haake rotor rheometer to be mixed with the primary modified PP material, keeping the temperature inside the haake rotor rheometer at 145-155 ℃, and mixing for 15-25 minutes to prepare a modified PP semi-finished product;
s5: and adding the modified PP semi-finished product into a double-screw extruder, controlling the temperature inside the double-screw extruder to be 180-200 ℃ and the rotating speed of a screw to be 35-45 r/min, then extruding the modified PP, cooling the modified PP, pelletizing the modified PP, and finally drying to obtain the high-impact-resistance transparent modified PP material.
Referring to FIG. 1, example II
The embodiment provides a high-impact transparent modified PP material, which comprises 120 parts of PP mixture, 38 parts of transparent nylon, 17 parts of connecting agent, 0.8 part of antioxidant, 0.7 part of stabilizer, 0.4 part of lubricant, 1.8 parts of transparent nucleating agent, 7 parts of shell powder, 3.0 parts of poly-N-vinyl caprolactam-b-polycaprolactone and 18 parts of basic magnesium carbonate, wherein the transparent nucleating agent comprises sorbierite benzylidene derivative, organic phosphate, beta-crystal form nucleating agent NA-11 and calcium carbonate powder, the PP mixture is formed by mixing homopolymerized PP, impact-resistant copolymerized PP and transparent random copolymerized PP, the dosage ratio of the homopolymerized PP, the impact-resistant copolymerized PP and the transparent random copolymerized PP is 2:3:1, the connecting agent comprises maleic anhydride grafted polyolefin elastomer, itaconic acid, benzoyl peroxide and oxazoline styrene, the preparation method comprises the following steps of (1) adding a connecting agent in the mixing and hot melting process of a PP mixture and transparent nylon, wherein the dosage ratio of maleic anhydride grafted polyolefin elastomer, itaconic acid, benzoyl peroxide and oxazoline functionalized polystyrene is 4:3:2:1, the dosage ratio of sorbierite benzylidene derivative, organic phosphate, beta crystal form nucleating agent NA-11 and calcium carbonate powder is 4:3:4:1, and the preparation method of shell powder comprises the following steps: putting clean shells into a crushing device for grinding and crushing to generate crushed materials with different sizes, then adding the crushed materials into a grinding device for high-speed grinding until the shell powder passes through a 40-mesh sieve, wherein the antioxidant comprises pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and dilauryl thiodipropionate, the dosage ratio of the pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] to the dilauryl thiodipropionate is 2:1, the stabilizer is bis-2, 2,6, 6-tetramethylpiperidinol sebacate, and the lubricant is one or more of potassium stearate, zinc stearate and paraffin.
A preparation method of a high-impact transparent modified PP material comprises the following steps:
s1: pouring the PP mixture into a double-screw extruder, and extruding the PP mixture into a high-concentration PP material after hot melting;
s2: pouring the transparent nylon and the PP material into a haake rotor rheometer according to the proportion for mixing, raising the temperature inside the haake rotor rheometer to 140-180 ℃, then adding the connecting agent while mixing, and then continuously mixing for 20-25 minutes to prepare a primary modified PP material;
s3: adding an antioxidant, a stabilizer, a lubricant, a transparent nucleating agent, shell powder, poly-N-vinylcaprolactam-b-polycaprolactone and basic magnesium carbonate into crushing and grinding equipment according to a proportion, crushing and mixing, wherein the temperature in the crushing and grinding equipment is firstly reduced to minus, and is crushed and mixed for 5 to 8 minutes, then the temperature is quickly increased to 40 to 50 ℃, and the crushing and stirring are continued for 5 to 10 minutes to prepare an additive mixture;
s4: pouring the additive mixture into a haake rotor rheometer to be mixed with the primary modified PP material, keeping the temperature inside the haake rotor rheometer at 145-155 ℃, and mixing for 15-25 minutes to prepare a modified PP semi-finished product;
s5: and adding the modified PP semi-finished product into a double-screw extruder, controlling the temperature inside the double-screw extruder to be 180-200 ℃ and the rotating speed of a screw to be 35-45 r/min, then extruding the modified PP, cooling the modified PP, pelletizing the modified PP, and finally drying to obtain the high-impact-resistance transparent modified PP material.
Referring to FIG. 1, example III
The embodiment provides a high-impact transparent modified PP material, which comprises 120 parts of PP mixture, 37 parts of transparent nylon, 16 parts of connecting agent, 0.7 part of antioxidant, 0.6 part of stabilizer, 0.4 part of lubricant, 1.6 parts of transparent nucleating agent, 4 parts of shell powder, 2.5 parts of poly-N-vinyl caprolactam-b-polycaprolactone and 17 parts of basic magnesium carbonate, wherein the transparent nucleating agent comprises sorbierite benzylidene derivative, organic phosphate, beta-crystal form nucleating agent NA-11 and calcium carbonate powder, the PP mixture is formed by mixing homopolymerized PP, impact-resistant copolymerized PP and transparent random copolymerized PP, the dosage ratio of the homopolymerized PP, the impact-resistant copolymerized PP and the transparent random copolymerized PP is 2:3:1, the connecting agent comprises maleic anhydride grafted polyolefin elastomer, itaconic acid, benzoyl peroxide and oxazoline styrene, the preparation method comprises the following steps of (1) adding a connecting agent in the mixing and hot melting process of a PP mixture and transparent nylon, wherein the dosage ratio of maleic anhydride grafted polyolefin elastomer, itaconic acid, benzoyl peroxide and oxazoline functionalized polystyrene is 4:3:2:1, the dosage ratio of sorbierite benzylidene derivative, organic phosphate, beta crystal form nucleating agent NA-11 and calcium carbonate powder is 4:3:4:1, and the preparation method of shell powder comprises the following steps: putting clean shells into a crushing device for grinding and crushing to generate crushed materials with different sizes, then adding the crushed materials into a grinding device for high-speed grinding until the shell powder passes through a 40-mesh sieve, wherein the antioxidant comprises pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and dilauryl thiodipropionate, the dosage ratio of the pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] to the dilauryl thiodipropionate is 2:1, the stabilizer is bis-2, 2,6, 6-tetramethylpiperidinol sebacate, and the lubricant is one or more of potassium stearate, zinc stearate and paraffin.
A preparation method of a high-impact transparent modified PP material comprises the following steps:
s1: pouring the PP mixture into a double-screw extruder, and extruding the PP mixture into a high-concentration PP material after hot melting;
s2: pouring the transparent nylon and the PP material into a haake rotor rheometer according to the proportion for mixing, raising the temperature inside the haake rotor rheometer to 140-180 ℃, then adding the connecting agent while mixing, and then continuously mixing for 20-25 minutes to prepare a primary modified PP material;
s3: adding an antioxidant, a stabilizer, a lubricant, a transparent nucleating agent, shell powder, poly-N-vinylcaprolactam-b-polycaprolactone and basic magnesium carbonate into crushing and grinding equipment according to a proportion, crushing and mixing, wherein the temperature in the crushing and grinding equipment is firstly reduced to minus, and is crushed and mixed for 5 to 8 minutes, then the temperature is quickly increased to 40 to 50 ℃, and the crushing and stirring are continued for 5 to 10 minutes to prepare an additive mixture;
s4: pouring the additive mixture into a haake rotor rheometer to be mixed with the primary modified PP material, keeping the temperature inside the haake rotor rheometer at 145-155 ℃, and mixing for 15-25 minutes to prepare a modified PP semi-finished product;
s5: and adding the modified PP semi-finished product into a double-screw extruder, controlling the temperature inside the double-screw extruder to be 180-200 ℃ and the rotating speed of a screw to be 35-45 r/min, then extruding the modified PP, cooling the modified PP, pelletizing the modified PP, and finally drying to obtain the high-impact-resistance transparent modified PP material.
Referring to FIG. 1, example No. four
The embodiment provides a high-impact transparent modified PP material, which comprises 120 parts of PP mixture, 36 parts of transparent nylon, 15 parts of connecting agent, 0.6 part of antioxidant, 0.5 part of stabilizer, 0.3 part of lubricant, 1.4 parts of transparent nucleating agent, 3 parts of shell powder, 2.0 parts of poly-N-vinyl caprolactam-b-polycaprolactone and 16 parts of basic magnesium carbonate, wherein the transparent nucleating agent comprises sorbierite benzylidene derivative, organic phosphate, beta-crystal form nucleating agent NA-11 and calcium carbonate powder, the PP mixture is formed by mixing homopolymerized PP, impact-resistant copolymerized PP and transparent random copolymerized PP, the dosage ratio of the homopolymerized PP, the impact-resistant copolymerized PP and the transparent random copolymerized PP is 2:3:1, the connecting agent comprises maleic anhydride grafted polyolefin elastomer, itaconic acid, benzoyl peroxide and oxazoline styrene, the preparation method comprises the following steps of (1) adding a connecting agent in the mixing and hot melting process of a PP mixture and transparent nylon, wherein the dosage ratio of maleic anhydride grafted polyolefin elastomer, itaconic acid, benzoyl peroxide and oxazoline functionalized polystyrene is 4:3:2:1, the dosage ratio of sorbierite benzylidene derivative, organic phosphate, beta crystal form nucleating agent NA-11 and calcium carbonate powder is 4:3:4:1, and the preparation method of shell powder comprises the following steps: putting clean shells into a crushing device for grinding and crushing to generate crushed materials with different sizes, then adding the crushed materials into a grinding device for high-speed grinding until the shell powder passes through a 40-mesh sieve, wherein the antioxidant comprises pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and dilauryl thiodipropionate, the dosage ratio of the pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] to the dilauryl thiodipropionate is 2:1, the stabilizer is bis-2, 2,6, 6-tetramethylpiperidinol sebacate, and the lubricant is one or more of potassium stearate, zinc stearate and paraffin.
A preparation method of a high-impact transparent modified PP material comprises the following steps:
s1: pouring the PP mixture into a double-screw extruder, and extruding the PP mixture into a high-concentration PP material after hot melting;
s2: pouring the transparent nylon and the PP material into a haake rotor rheometer according to the proportion for mixing, raising the temperature inside the haake rotor rheometer to 140-180 ℃, then adding the connecting agent while mixing, and then continuously mixing for 20-25 minutes to prepare a primary modified PP material;
s3: adding an antioxidant, a stabilizer, a lubricant, a transparent nucleating agent, shell powder, poly-N-vinylcaprolactam-b-polycaprolactone and basic magnesium carbonate into crushing and grinding equipment according to a proportion, crushing and mixing, wherein the temperature in the crushing and grinding equipment is firstly reduced to minus, and is crushed and mixed for 5 to 8 minutes, then the temperature is quickly increased to 40 to 50 ℃, and the crushing and stirring are continued for 5 to 10 minutes to prepare an additive mixture;
s4: pouring the additive mixture into a haake rotor rheometer to be mixed with the primary modified PP material, keeping the temperature inside the haake rotor rheometer at 145-155 ℃, and mixing for 15-25 minutes to prepare a modified PP semi-finished product;
s5: and adding the modified PP semi-finished product into a double-screw extruder, controlling the temperature inside the double-screw extruder to be 180-200 ℃ and the rotating speed of a screw to be 35-45 r/min, then extruding the modified PP, cooling the modified PP, pelletizing the modified PP, and finally drying to obtain the high-impact-resistance transparent modified PP material.
Referring to FIG. 1, example V
The embodiment provides a high-impact transparent modified PP material, which comprises 120 parts of PP mixture, 35 parts of transparent nylon, 14 parts of connecting agent, 0.5 part of antioxidant, 0.4 part of stabilizer, 0.2 part of lubricant, 1.2 parts of transparent nucleating agent, 2 parts of shell powder, 1.5 parts of poly-N-vinyl caprolactam-b-polycaprolactone and 15 parts of basic magnesium carbonate, wherein the transparent nucleating agent comprises sorbierite benzylidene derivative, organic phosphate, beta-crystal form nucleating agent NA-11 and calcium carbonate powder, the PP mixture is formed by mixing homopolymerized PP, impact-resistant copolymerized PP and transparent random copolymerized PP, the dosage ratio of the homopolymerized PP, the impact-resistant copolymerized PP and the transparent random copolymerized PP is 2:3:1, the connecting agent comprises maleic anhydride grafted polyolefin elastomer, itaconic acid, benzoyl peroxide and oxazoline styrene, the preparation method comprises the following steps of (1) adding a connecting agent in the mixing and hot melting process of a PP mixture and transparent nylon, wherein the dosage ratio of maleic anhydride grafted polyolefin elastomer, itaconic acid, benzoyl peroxide and oxazoline functionalized polystyrene is 4:3:2:1, the dosage ratio of sorbierite benzylidene derivative, organic phosphate, beta crystal form nucleating agent NA-11 and calcium carbonate powder is 4:3:4:1, and the preparation method of shell powder comprises the following steps: putting clean shells into a crushing device for grinding and crushing to generate crushed materials with different sizes, then adding the crushed materials into a grinding device for high-speed grinding until the shell powder passes through a 40-mesh sieve, wherein the antioxidant comprises pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and dilauryl thiodipropionate, the dosage ratio of the pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] to the dilauryl thiodipropionate is 2:1, the stabilizer is bis-2, 2,6, 6-tetramethylpiperidinol sebacate, and the lubricant is one or more of potassium stearate, zinc stearate and paraffin.
A preparation method of a high-impact transparent modified PP material comprises the following steps:
s1: pouring the PP mixture into a double-screw extruder, and extruding the PP mixture into a high-concentration PP material after hot melting;
s2: pouring the transparent nylon and the PP material into a haake rotor rheometer according to the proportion for mixing, raising the temperature inside the haake rotor rheometer to 140-180 ℃, then adding the connecting agent while mixing, and then continuously mixing for 20-25 minutes to prepare a primary modified PP material;
s3: adding an antioxidant, a stabilizer, a lubricant, a transparent nucleating agent, shell powder, poly-N-vinylcaprolactam-b-polycaprolactone and basic magnesium carbonate into crushing and grinding equipment according to a proportion, crushing and mixing, wherein the temperature in the crushing and grinding equipment is firstly reduced to minus, and is crushed and mixed for 5 to 8 minutes, then the temperature is quickly increased to 40 to 50 ℃, and the crushing and stirring are continued for 5 to 10 minutes to prepare an additive mixture;
s4: pouring the additive mixture into a haake rotor rheometer to be mixed with the primary modified PP material, keeping the temperature inside the haake rotor rheometer at 145-155 ℃, and mixing for 15-25 minutes to prepare a modified PP semi-finished product;
s5: and adding the modified PP semi-finished product into a double-screw extruder, controlling the temperature inside the double-screw extruder to be 180-200 ℃ and the rotating speed of a screw to be 35-45 r/min, then extruding the modified PP, cooling the modified PP, pelletizing the modified PP, and finally drying to obtain the high-impact-resistance transparent modified PP material.
Comparing the conventionally prepared modified PP material with the modified PP materials prepared in examples one to five, the modified PP materials prepared in examples one to five are as follows:
Figure BDA0003216311900000131
as can be seen from the above table, the tensile yield stress, flexural modulus, Izod impact strength and light transmittance of the modified PP material prepared by the invention are significantly improved, and the second embodiment is the best embodiment.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (10)

1. A high-impact-resistance transparent modified PP material is characterized by comprising 120 parts of PP mixture, 35-39 parts of transparent nylon, 14-18 parts of connecting agent, 0.5-0.9 part of antioxidant, 0.4-0.8 part of stabilizer, 0.2-0.5 part of lubricant, 1.2-2.0 parts of transparent nucleating agent, 2-8 parts of shell powder, 1.5-3.5 parts of poly-N-vinyl caprolactam-b-polycaprolactone and 15-19 parts of basic magnesium carbonate, wherein the transparent nucleating agent comprises sorbierite benzylidene derivative, organic phosphate, beta-crystal form nucleating agent NA-11 and calcium carbonate powder.
2. The high impact transparent modified PP material according to claim 1, wherein the PP mixture is formed by mixing homopolymerized PP, medium impact copolymerized PP and transparent random copolymerized PP, and the dosage ratio of the homopolymerized PP, the medium impact copolymerized PP and the transparent random copolymerized PP is 2:3: 1.
3. The high impact transparent modified PP material of claim 1, wherein the linking agent comprises maleic anhydride grafted polyolefin elastomer, itaconic acid, benzoyl peroxide and oxazoline functionalized polystyrene, and the ratio of the amount of the maleic anhydride grafted polyolefin elastomer, the amount of the itaconic acid, the amount of the benzoyl peroxide and the amount of the oxazoline functionalized polystyrene is 4:3:2: 1.
4. The high impact transparent modified PP material of claim 1, wherein the dosage ratio of the sorbierite benzylidene derivative, the organic phosphate, the beta crystal nucleating agent NA-11 and the calcium carbonate powder is 4:3:4: 1.
5. The high impact transparent modified PP material of claim 1, wherein a linking agent is added during the mixing and hot melting of the PP mixture and the transparent nylon.
6. The high impact transparent modified PP material of claim 1, wherein the shell powder is prepared by the following steps: and (3) putting the clean shell into crushing equipment for grinding and crushing to generate crushed materials with different sizes, and then adding the crushed materials into grinding equipment for high-speed grinding until the shell powder passes through a 40-mesh sieve.
7. The high impact transparent modified PP material of claim 1, wherein the antioxidant comprises pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and dilauryl thiodipropionate, and the ratio of the amount of pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] to the amount of dilauryl thiodipropionate is 2: 1.
8. The high impact transparent modified PP material of claim 1, wherein the stabilizer is bis-2, 2,6, 6-tetramethylpiperidinol sebacate.
9. The high impact transparent modified PP material of claim 1, wherein the lubricant is one or more of potassium stearate, zinc stearate and paraffin wax.
10. A preparation method of a high-impact transparent modified PP material is characterized by comprising the following steps:
s1: pouring the PP mixture into a double-screw extruder, and extruding the PP mixture into a high-concentration PP material after hot melting;
s2: pouring the transparent nylon and the PP material into a haake rotor rheometer according to the proportion for mixing, raising the temperature inside the haake rotor rheometer to 140-180 ℃, then adding the connecting agent while mixing, and then continuously mixing for 20-25 minutes to prepare a primary modified PP material;
s3: adding an antioxidant, a stabilizer, a lubricant, a transparent nucleating agent, shell powder, poly-N-vinylcaprolactam-b-polycaprolactone and basic magnesium carbonate into crushing and grinding equipment according to a proportion, crushing and mixing, wherein the temperature in the crushing and grinding equipment is firstly reduced to minus, and is crushed and mixed for 5 to 8 minutes, then the temperature is quickly increased to 40 to 50 ℃, and the crushing and stirring are continued for 5 to 10 minutes to prepare an additive mixture;
s4: pouring the additive mixture into a haake rotor rheometer to be mixed with the primary modified PP material, keeping the temperature inside the haake rotor rheometer at 145-155 ℃, and mixing for 15-25 minutes to prepare a modified PP semi-finished product;
s5: and adding the modified PP semi-finished product into a double-screw extruder, controlling the temperature inside the double-screw extruder to be 180-200 ℃ and the rotating speed of a screw to be 35-45 r/min, then extruding the modified PP, cooling the modified PP, pelletizing the modified PP, and finally drying to obtain the high-impact-resistance transparent modified PP material.
CN202110944547.7A 2021-08-17 2021-08-17 High-impact-resistance transparent modified PP material and preparation method thereof Withdrawn CN113462085A (en)

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