CN114854128A - Toughened polypropylene color master batch and preparation method thereof - Google Patents

Toughened polypropylene color master batch and preparation method thereof Download PDF

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CN114854128A
CN114854128A CN202210592316.9A CN202210592316A CN114854128A CN 114854128 A CN114854128 A CN 114854128A CN 202210592316 A CN202210592316 A CN 202210592316A CN 114854128 A CN114854128 A CN 114854128A
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polypropylene
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郭廷辉
苏强
杨帆
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/20—Compounding polymers with additives, e.g. colouring
    • C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
    • C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/10—Homopolymers or copolymers of propene
    • C08J2423/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2427/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08J2427/16—Homopolymers or copolymers of vinylidene fluoride
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2477/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
    • 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
    • C08K3/28—Nitrogen-containing compounds
    • 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
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/13—Phenols; Phenolates
    • C08K5/132—Phenols containing keto groups, e.g. benzophenones

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Abstract

The invention belongs to the technical field of polypropylene color master batches, and particularly relates to a toughening polypropylene color master batch and a preparation method thereof, wherein the toughening polypropylene color master batch comprises the following raw materials in parts by weight: 55-75 parts of polypropylene; 15-25 parts of polyvinylidene fluoride; 12-20 parts of polyamide; 0.1-3.5 parts of a light absorbent; 0.1-3.5 parts of titanium nitride; 3-5 parts of toner; putting the raw material components into a high-speed mixer for dry mixing treatment to obtain a mixture; and adding the uniformly mixed materials into a double-screw extruder, mixing, extruding, cooling and granulating to obtain the toughened polypropylene color master batch. The invention can improve the low-temperature impact resistance without greatly reducing the strength performance of the pull rope, can improve the heat resistance of the invention, further expands the application range of the polypropylene color master batch, can be used in severe cold environment in winter in the north, can also be used in high-temperature environment in summer, and is suitable for popularization and application.

Description

Toughened polypropylene color master batch and preparation method thereof
Technical Field
The invention belongs to the technical field of polypropylene color master batches, and particularly relates to a toughened polypropylene color master batch and a preparation method thereof.
Background
Polypropylene is a polymer of propylene produced by addition polymerization. Is white wax-like material, and has transparent and light appearance. Has a chemical formula of (C) 3 H 6 ) n The density is 0.89 to 0.91g/cm 3 The material is flammable, has a melting point of 189 ℃, and is softened at about 155 ℃, and the use temperature range is-30-140 ℃. Can resist corrosion of acid, alkali, salt solution and various organic solvents at the temperature of below 80 ℃, and can be decomposed at high temperature and under the action of oxidation. The polypropylene is widely applied to the production of fiber products such as clothes, blankets and the like, medical instruments, automobiles, bicycles, parts, conveying pipelines, chemical containers and the like, and is also used for packaging foods and medicines.
Polypropylene (PP) is widely used in the fields of machinery, automobiles, food packaging, and the like. However, the impact resistance of polypropylene is poor, and the polypropylene is very sensitive to low-temperature environment, and the color master batch prepared by using polypropylene resin as a raw material can influence the low-temperature resistance of a final product in the using process, so that the application range of the product is reduced, and the product cannot be used outdoors in the north.
And the polypropylene color master batch applied to northern cold areas has a service life which is bound to be lower and lower due to long-term low temperature resistance, in the prior art, the ethylene-1-octene copolymer or the high-density polyethylene is generally added into the polypropylene to improve the cold resistance of the polypropylene and further improve the impact resistance, but the heat resistance of the polypropylene added with the ethylene must be sacrificed, the maximum using temperature of the high-density polyethylene is about 100 ℃, the heat resistance of the color master batch can be reduced by the color master batch compounded with the polypropylene, and the impact resistance of the existing color master batch is not very excellent.
In view of the above, the present invention provides a toughened polypropylene color master batch and a preparation method thereof, so as to solve the above technical problems.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides a toughening polypropylene color master batch and a preparation method thereof, which are used for solving at least one technical problem in the background art.
The technical scheme adopted by the invention for solving the technical problems is as follows: the toughening polypropylene color master batch comprises the following raw materials in parts by weight:
55-75 parts of polypropylene;
15-25 parts of polyvinylidene fluoride;
12-20 parts of polyamide;
0.1-3.5 parts of a light absorbent;
0.1-3.5 parts of titanium nitride;
3-5 parts of toner.
Preferably, the feed comprises the following raw materials in parts by weight:
62 parts of polypropylene;
20 parts of polyvinylidene fluoride;
16 parts of polyamide;
2.1 parts of a light absorbent;
2.1 parts of titanium nitride;
3.8 parts of toner.
Preferably, the weight ratio of the light absorber to the titanium nitride is 1: 1, the weight ratio of the light absorbent to the toner is 1: 1.5 to 2.0.
Preferably, the polyvinylidene fluoride is a polyvinylidene fluoride homopolymer or a polyvinylidene fluoride copolymer, and the particle size of the polyvinylidene fluoride is 1-10 μm.
Preferably, the weight ratio of the polyvinylidene fluoride to the polypropylene is 1: 3.2 to 4.0.
Preferably, the toner is one or more of phthalocyanine blue, permanent yellow, azo red and carbon black.
Preferably, the light absorber is light absorber UV-531, light absorber UV-320, light absorber UV-326, light absorber UV-327, light absorber UV-328, or light absorber UV-329.
A preparation method of toughened polypropylene color master batch comprises the following steps:
the method comprises the following steps: weighing the following raw material components in parts by weight: 55-75 parts by weight of polypropylene, 15-25 parts by weight of polyvinylidene fluoride, 12-20 parts by weight of polyamide, 0.1-3.5 parts by weight of light absorbent, 0.1-3.5 parts by weight of titanium nitride and 3-5 parts by weight of toner;
step two: putting the raw material components into a high-speed mixer for dry mixing treatment to obtain a mixture;
step three: and adding the uniformly mixed materials into a double-screw extruder, mixing, extruding, cooling and granulating to obtain the toughened polypropylene color master batch.
Preferably, the temperature of the twin-screw extruder in the third step is in the range of 180-230 ℃.
Preferably, the temperature of the twin-screw extruder is set as follows: the first zone is 180-.
The invention has the following beneficial effects:
1. the light absorbent and the titanium nitride are added, so that the heat absorption performance of the polypropylene color master batch can be improved, namely, when a plastic piece made of the polypropylene color master batch is used outdoors in a sunny environment, the plastic piece can quickly absorb the heat of the sunshine, the temperature of the plastic piece is further improved, the impact strength performance can be further quickly improved, the light absorbent also has an anti-oxidation function, and the service life of the plastic piece can be simultaneously prolonged.
2. The invention can improve the low-temperature impact resistance without greatly reducing the strength performance of the pull rope, can improve the heat resistance of the invention, further expands the application range of the polypropylene color master batch, can be used in severe cold environment in winter in the north, can also be used in high-temperature environment in summer, and is suitable for popularization and application.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is an SEM photograph of a brittle section of example 3 according to the present invention;
FIG. 2 is an SEM photograph of an impact cross-section of example 3 of the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Example 1:
a preparation method of a toughening polypropylene color master batch comprises the following steps:
the method comprises the following steps: weighing the following raw material components in parts by weight: 55kg of polypropylene, 15kg of polyvinylidene fluoride homopolymer, 12kg of polyamide, 0.1kg of light absorber UV-326, 0.1kg of titanium nitride and 3kg of toner;
step two: putting the raw material components into a high-speed mixer for dry mixing treatment to obtain a mixture;
step three: and adding the uniformly mixed materials into a double-screw extruder, mixing, extruding into strips, and cooling to obtain sample strips.
The temperature of the twin-screw extruder was set as follows: the first zone is 180 ℃, the second zone is 200 ℃, the third zone is 210 ℃, the fourth zone is 220 ℃, the head temperature is 210 ℃, and the screw rotation speed is 260 r/min.
Example 2:
a preparation method of toughened polypropylene color master batch comprises the following steps:
the method comprises the following steps: weighing the following raw material components in parts by weight: 60kg of polypropylene, 18kg of polyvinylidene fluoride homopolymer, 14kg of polyamide, 1.2kg of light absorber UV-326, 1.2kg of titanium nitride and 3.5kg of toner;
step two: putting the raw material components into a high-speed mixer for dry mixing treatment to obtain a mixture;
step three: and adding the uniformly mixed materials into a double-screw extruder, mixing, extruding into strips, and cooling to obtain sample strips.
The temperature of the twin-screw extruder was set as follows: the first zone is 185 ℃, the second zone is 205 ℃, the third zone is 215 ℃, the fourth zone is 225 ℃, the head temperature is 215 ℃, and the screw rotation speed is 260 r/min.
Example 3:
a preparation method of toughened polypropylene color master batch comprises the following steps:
the method comprises the following steps: weighing the following raw material components in parts by weight: 62kg of polypropylene, 20kg of polyvinylidene fluoride homopolymer, 16kg of polyamide, 2.1kg of light absorbent UV-326, 2.1kg of titanium nitride and 3.8kg of toner;
step two: putting the raw material components into a high-speed mixer for dry mixing treatment to obtain a mixture;
step three: and adding the uniformly mixed materials into a double-screw extruder, mixing, extruding into strips, and cooling to obtain sample bars.
The temperature of the twin-screw extruder was set as follows: 190 ℃ in the first area, 205 ℃ in the second area, 215 ℃ in the third area, 225 ℃ in the fourth area, 215 ℃ at the head temperature and 260r/min at the screw rotation speed.
Example 4:
a preparation method of toughened polypropylene color master batch comprises the following steps:
the method comprises the following steps: weighing the following raw material components in parts by weight: 66kg of polypropylene, 21kg of polyvinylidene fluoride homopolymer, 16kg of polyamide, 2.8kg of light absorber UV-326, 2.8kg of titanium nitride and 4.2kg of toner;
step two: putting the raw material components into a high-speed mixer for dry mixing treatment to obtain a mixture;
step three: and adding the uniformly mixed materials into a double-screw extruder, mixing, extruding into strips, and cooling to obtain sample strips.
The temperature of the twin-screw extruder was set as follows: 190 ℃ in the first area, 205 ℃ in the second area, 215 ℃ in the third area, 225 ℃ in the fourth area, 215 ℃ at the head temperature and 260r/min at the screw rotation speed.
Example 5:
a preparation method of toughened polypropylene color master batch comprises the following steps:
the method comprises the following steps: weighing the following raw material components in parts by weight: 66kg of polypropylene, 21kg of polyvinylidene fluoride copolymer, 16kg of polyamide, 2.8kg of light absorber UV-326, 2.8kg of titanium nitride and 4.2kg of toner;
step two: putting the raw material components into a high-speed mixer for dry mixing treatment to obtain a mixture;
step three: and adding the uniformly mixed materials into a double-screw extruder, mixing, extruding into strips, and cooling to obtain sample strips.
The temperature of the twin-screw extruder was set as follows: 190 ℃ in the first area, 205 ℃ in the second area, 215 ℃ in the third area, 225 ℃ in the fourth area, 215 ℃ at the head temperature and 260r/min at the screw rotation speed.
Example 6:
a preparation method of toughened polypropylene color master batch comprises the following steps:
the method comprises the following steps: weighing the following raw material components in parts by weight: 75kg of polypropylene, 25kg of polyvinylidene fluoride homopolymer, 20kg of polyamide, 3.5kg of light absorber UV-326, 3.5kg of titanium nitride and 5kg of toner;
step two: putting the raw material components into a high-speed mixer for dry mixing treatment to obtain a mixture;
step three: and adding the uniformly mixed materials into a double-screw extruder, mixing, extruding into strips, and cooling to obtain sample strips.
The temperature of the twin-screw extruder was set as follows: the first zone is 200 ℃, the second zone is 210 ℃, the third zone is 220 ℃, the fourth zone is 230 ℃, the head temperature is 220 ℃, and the screw rotation speed is 260 r/min.
Comparative example 1:
a preparation method of toughened polypropylene color master batch comprises the following steps:
the method comprises the following steps: weighing the following raw material components in parts by weight: 62kg of polypropylene, 20kg of polyvinylidene fluoride homopolymer, 16kg of polyamide and 3.8kg of toner;
step two: putting the raw material components into a high-speed mixer for dry mixing treatment to obtain a mixture;
step three: and adding the uniformly mixed materials into a double-screw extruder, mixing, extruding into strips, and cooling to obtain sample strips.
The temperature of the twin-screw extruder was set as follows: 190 ℃ in the first area, 205 ℃ in the second area, 215 ℃ in the third area, 225 ℃ in the fourth area, 215 ℃ at the head temperature and 260r/min at the screw rotation speed.
Comparative example 2:
a preparation method of toughened polypropylene color master batch comprises the following steps:
the method comprises the following steps: weighing the following raw material components in parts by weight: 62kg of polypropylene, 20kg of polyvinylidene fluoride homopolymer, 2.1kg of light absorbent UV-326, 2.1kg of titanium nitride and 3.8kg of toner;
step two: putting the raw material components into a high-speed mixer for dry mixing treatment to obtain a mixture;
step three: and adding the uniformly mixed materials into a double-screw extruder, mixing, extruding into strips, and cooling to obtain sample strips.
The temperature of the twin-screw extruder was set as follows: 190 ℃ in the first area, 205 ℃ in the second area, 215 ℃ in the third area, 225 ℃ in the fourth area, 215 ℃ at the head temperature and 260r/min at the screw rotation speed.
Comparative example 3:
a preparation method of toughened polypropylene color master batch comprises the following steps:
the method comprises the following steps: weighing the following raw material components in parts by weight: 62kg of polypropylene, 16kg of polyamide, 2.1kg of light absorber UV-326, 2.1kg of titanium nitride and 3.2kg of toner;
step two: putting the raw material components into a high-speed mixer for dry mixing treatment to obtain a mixture;
step three: and adding the uniformly mixed materials into a double-screw extruder, mixing, extruding into strips, and cooling to obtain sample strips.
The temperature of the twin-screw extruder was set as follows: 190 ℃ in the first area, 205 ℃ in the second area, 215 ℃ in the third area, 225 ℃ in the fourth area, 215 ℃ at the head temperature and 260r/min at the screw rotation speed.
Comparative example 4:
a preparation method of polypropylene color master batch comprises the following steps:
the method comprises the following steps: weighing the following raw material components in parts by weight: 62kg of polypropylene and 2.8kg of toner;
step two: putting the raw material components into a high-speed mixer for dry mixing treatment to obtain a mixture;
step three: and adding the uniformly mixed materials into a double-screw extruder, mixing, extruding into strips, and cooling to obtain sample strips.
The temperature of the twin-screw extruder was set as follows: 190 ℃ in the first area, 205 ℃ in the second area, 215 ℃ in the third area, 225 ℃ in the fourth area, 215 ℃ at the head temperature and 260r/min at the screw rotation speed.
Comparative example 5:
a preparation method of polypropylene color master batch comprises the following steps:
the method comprises the following steps: weighing the following raw material components in parts by weight: 90kg of polypropylene, 10kg of high density polyethylene and 4.2kg of toner;
step two: putting the raw material components into a high-speed mixer for dry mixing treatment to obtain a mixture;
step three: and adding the uniformly mixed materials into a double-screw extruder, mixing, extruding into strips, and cooling to obtain sample bars.
The temperature of the twin-screw extruder was set as follows: 190 ℃ in the first area, 205 ℃ in the second area, 215 ℃ in the third area, 225 ℃ in the fourth area, 215 ℃ at the head temperature and 260r/min at the screw rotation speed.
Experimental part:
experiment one: test for Normal temperature impact Strength
1. Preparing experimental raw materials:
the polypropylene specimens of examples 1-6;
polypropylene bars of comparative examples 1-5;
2. the experimental standard is as follows: the notched impact strength of the simply supported beam was measured in accordance with ASTM D6110-2004 at a test temperature of 25 ℃. The results were averaged for 5 experiments.
TABLE 1 impact Strength Properties of examples 1-6 and comparative examples 1-5
Figure BDA0003665914490000061
Figure BDA0003665914490000071
As can be seen from table 1: the impact strength of example 3 was at its maximum 72.7kJ · m in a room temperature atmosphere -2 By comparing example 3 with comparative example 2, it can be found that: the impact strength of example 3 in which the polyamide was added was greater than that of comparative example 2 in which the polyamide was not added, and it can be seen that the polyamide was able to improveThe impact strength of the toughened polypropylene color master batch is high, and the polyamide is composed of linear macromolecules with amido bonds (-NHCO-) and can form hydrogen bond combination between molecules or between molecules and also can be combined with other molecules so as to be combined with polypropylene, so that the impact strength of the polypropylene color master batch can be improved;
by comparing example 3 with comparative example 3, it can be found that: the impact strength of the embodiment 3 added with the polyvinylidene fluoride homopolymer is far greater than that of the comparative example 2 without the polyvinylidene fluoride homopolymer, so that the polyvinylidene fluoride homopolymer can improve the impact strength of the toughened polypropylene color master batch, the chemical structure of the polyvinylidene fluoride homopolymer is combined by a fluorine-carbon bonding bond, and the structure with the short bond property forms the most stable and firm combination with hydrogen ions, so that the structure can be combined with polypropylene, and the impact strength of the polypropylene color master batch can be improved; therefore, the invention can improve the low-temperature impact resistance.
As shown in fig. 1 and 2, fig. 1 is an SEM photograph of a brittle section of example 3 of the present invention; fig. 2 is an SEM photograph of an impact cross section of example 3 in the present invention, which is because of the synergistic toughening effect of the polyvinylidene fluoride homopolymer and the polyamide, a large number of cracks are initiated when the core-shell particles are impacted, a large amount of impact energy is absorbed and dispersed, the cracks interfere with each other, the development of cracks is prevented, the toughness of the polypropylene color master batch is improved, the core-shell structure particles can induce silver streaks and shear bands to serve as a stress concentration source, and the core-shell structure particles also have the functions of retarding, turning and terminating small cracks: when it encounters an extended craze, the shear band plays an important role in toughening because it provides more shear deformation than the maximum deformation provided by the craze, absorbing a large amount of impact energy.
Experiment two: experiment of impact strength influence of illumination in low-temperature environment
1. Preparing experimental raw materials:
the polypropylene splines of examples 1-6;
polypropylene bars of comparative examples 1-5;
2. the experimental standard is as follows: the notched impact strength of the simply supported beam was measured in accordance with ASTM D6110-2004 at a test temperature of 0 ℃ by irradiating the sample strips of examples and comparative examples with ultraviolet light having an energy of 2.0eV at a lamp source distance of 25cm from the sample strip for 5min by means of an Excimer-UV system, and immediately thereafter, subjecting the respective sample strips to the impact strength test. The results were averaged for 5 experiments.
TABLE 2 impact Strength Properties of examples 1-6 and comparative examples 1-5
Figure BDA0003665914490000081
As can be seen from table 2: in a low-temperature environment, the impact strength performance of the sample bars of all the examples or the comparative examples is reduced to a certain degree, wherein the impact strength of the example 3 is the maximum and reaches 67.5 kJ.m -2 By comparing example 3 with comparative example 2, it can be found that: the impact strength of the embodiment 3 added with the polyamide is higher than that of the comparative example 2 without the polyamide, so that the polyamide can improve the impact strength of the toughened polypropylene color master batch, and the polyamide is composed of linear macromolecules with amido bonds (-NHCO-) and can form hydrogen bond combination between molecules or between molecules and also can be combined with other molecules so as to be combined with the polypropylene and further improve the impact strength of the polypropylene color master batch; therefore, the low-temperature impact resistance can be improved, and the strength performance of the pull rope cannot be greatly reduced;
the comparison of the embodiment 1 and the comparison example 1 shows that the addition of the light absorbent and the titanium nitride can improve the heat absorption performance of the polypropylene color master batch, that is, when a plastic piece made of the polypropylene color master batch is used outdoors and in a sunny environment, the plastic piece can quickly absorb the heat of the sunshine, so that the temperature of the plastic piece can be improved, the impact strength performance can be quickly improved, and the light absorbent also has an anti-oxidation function, so that the service life of the plastic piece can be prolonged.
Experiment three: tensile Strength test
1. Preparing experimental raw materials:
the polypropylene splines of examples 1-6;
polypropylene bars of comparative examples 1-5;
2. the experimental standard is as follows: the tensile properties were measured according to ASTM D638-2003 with a tensile speed of 50mm/min and a test temperature of 25 ℃; specific experimental data are shown in table 3:
TABLE 3 tensile Strength Properties of examples 1-6 and comparative examples 1-5
Figure BDA0003665914490000091
As can be seen from table 3: the tensile strength of comparative example 4 was the greatest, reaching 24.1MPa, that is, the tensile strength of the neat polypropylene masterbatch was the greatest, whereas the tensile strength of inventive example 3 was the greatest in examples 1-6, as can be seen by comparing example 3 with comparative example 2: the tensile strength of the polyamide in the embodiment 3 is higher than that of the comparative example 2 without increasing the polyamide, so that the polyamide can improve the tensile strength of the toughened polypropylene color master batch, and the polyamide is composed of linear macromolecules with amido bonds (-NHCO-) and can form hydrogen bond combination between molecules or in molecules and also can be combined with other molecules so as to be combined with the polypropylene and further improve the tensile property of the polypropylene color master batch; therefore, the invention can improve the low-temperature impact resistance without greatly reducing the strength performance of the pull rope, further expands the application range of the polypropylene color master batch, and can be used in the northern severe cold environment.
Experiment four: high temperature impact Strength test
1. Preparing experimental raw materials:
the polypropylene splines of examples 1-6;
polypropylene bars of comparative examples 1-5;
2. the experimental standard is as follows: the notched impact strength of the simply supported beam was measured according to ASTM D6110-2004 at a test temperature of 70 ℃. The results were averaged for 5 experiments.
TABLE 4 impact Strength Properties of examples 1-6 and comparative examples 1-5
Figure BDA0003665914490000101
As can be seen from table 4: the impact strength of example 3 was the highest at 68.9kJ · m in a high-temperature environment -2 By comparing example 3 with comparative example 2, it can be found that: the impact strength of example 3 in which the polyamide is added is greater than that of comparative example 2 in which the polyamide is not added, and thus it can be seen that the polyamide can improve the impact strength of the polypropylene color masterbatch of the present invention in a high temperature environment;
by comparing example 3 with comparative example 3, it can be found that: in a high-temperature environment, the impact strength of the embodiment 3 added with the polyvinylidene fluoride homopolymer is far greater than that of the comparative example 2 without the polyvinylidene fluoride homopolymer, so that the polyvinylidene fluoride homopolymer can improve the impact strength of the polypropylene color master batch in the high-temperature environment, and therefore, the polypropylene color master batch is cold-resistant, high-temperature-resistant, wide in application range and suitable for popularization and application.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. A toughening polypropylene color master batch is characterized in that: the feed comprises the following raw materials in parts by weight:
55-75 parts of polypropylene;
15-25 parts of polyvinylidene fluoride;
12-20 parts of polyamide;
0.1-3.5 parts of a light absorbent;
0.1-3.5 parts of titanium nitride;
3-5 parts of toner.
2. The toughened polypropylene color masterbatch of claim 1, wherein: the feed comprises the following raw materials in parts by weight:
62 parts of polypropylene;
20 parts of polyvinylidene fluoride;
16 parts of polyamide;
2.1 parts of a light absorbent;
2.1 parts of titanium nitride;
3.8 parts of toner.
3. The toughened polypropylene color masterbatch of claim 1, wherein: the weight ratio of the light absorbent to the titanium nitride is 1: 1, the weight ratio of the light absorbent to the toner is 1: 1.5 to 2.0.
4. The toughened polypropylene color masterbatch of claim 1, wherein: the polyvinylidene fluoride is polyvinylidene fluoride homopolymer or polyvinylidene fluoride copolymer, and the particle size of the polyvinylidene fluoride is 1-10 mu m.
5. The toughened polypropylene color masterbatch of claim 1, wherein: the weight ratio of the polyvinylidene fluoride to the polypropylene is 1: 3.2 to 4.0.
6. The toughened polypropylene color masterbatch of claim 1, wherein: the toner is one or more of phthalocyanine blue, permanent yellow, azo red and carbon black.
7. The toughened polypropylene color masterbatch of claim 1, wherein: the light absorber is light absorber UV-531, light absorber UV-320, light absorber UV-326, light absorber UV-327, light absorber UV-328 or light absorber UV-329.
8. The method for preparing toughening polypropylene color masterbatch according to any one of claims 1 to 7, wherein: the method comprises the following steps:
the method comprises the following steps: weighing the following raw material components in parts by weight: 55-75 parts by weight of polypropylene, 15-25 parts by weight of polyvinylidene fluoride, 12-20 parts by weight of polyamide, 0.1-3.5 parts by weight of light absorbent, 0.1-3.5 parts by weight of titanium nitride and 3-5 parts by weight of toner;
step two: putting the raw material components into a high-speed mixer for dry mixing treatment to obtain a mixture;
step three: and adding the uniformly mixed materials into a double-screw extruder, mixing, extruding, cooling and granulating to obtain the toughened polypropylene color master batch.
9. The method for preparing the toughening polypropylene color master batch according to claim 8, wherein the toughening polypropylene color master batch comprises the following steps: the temperature range of the double-screw extruder in the third step is 180-230 ℃.
10. The method for preparing the toughening polypropylene color master batch according to claim 8, wherein the toughening polypropylene color master batch comprises the following steps: the temperature of the twin-screw extruder was set as follows: the first zone is 180-.
CN202210592316.9A 2022-05-27 2022-05-27 Toughened polypropylene color master batch and preparation method thereof Withdrawn CN114854128A (en)

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