High-toughness polypropylene plastic particle modified material

Abstract

The invention is suitable for the technical field of polypropylene, and provides a high-toughness polypropylene plastic particle modified material which is prepared from the following components in parts by mass: 60-80 parts of PP, 5-10 parts of mica powder, 10-20 parts of long glass fiber, 10-20 parts of EVA, 2-6 parts of a carbon nanotube / TiO2 composite material, 0.5-0.8 part of an antioxidant, 0.6-1 part of inorganic filler and 0.2-0.5 part of a lubricant. Preferably, the length specification of the long glass fiber is 5 to 15 mm; preferably, the antioxidant is one or more of Irgafos 168, Irganox 1010 and BHT (butylated hydroxytoluene); preferably, the inorganic filler is one or more of titanium dioxide, silica fume and silicate mineral powder; preferably, the lubricant is one or more of paraffin, calcium stearate and zinc stearate. The prepared polypropylene plastic particle modified material is remarkably improved in the aspects of toughness, heat resistance, aging resistance, processability and the like, and can be widely applied to the fields of automobile parts, household appliance shells, storage boxes, packaging materials and the like.

Description

Technical Field

[0001] The invention relates to the technical field of polypropylene, in particular to a high-toughness polypropylene plastic particle modified material. Background Art

[0002] Polypropylene (PP) is a semi-crystalline thermoplastic with high impact resistance, strong mechanical properties, and resistance to a variety of organic solvents and acid and alkali corrosion. Polypropylene plastic is a thermoplastic resin made by propylene polymerization. It has three configurations: isotactic, atactic, and syndiotactic. Industrial products are mainly composed of isotactic. Polypropylene also includes copolymers of propylene and a small amount of ethylene. It is usually a translucent, colorless solid, odorless and non-toxic. Due to its regular structure and high degree of crystallization, its melting point is as high as 167°C. It is heat-resistant and its products can be sterilized by steam, which is its outstanding advantage. The density is 0.90g / cm 3 It is the lightest general-purpose plastic, corrosion-resistant, with a tensile strength of 30MPa, and better strength, rigidity and transparency than polyethylene. Its disadvantages are poor low-temperature impact resistance and easy aging, but these can be overcome by modification and adding antioxidants.

[0003] The toughness of polypropylene is related to its crack resistance and fracture resistance when impacted. Polypropylene with higher toughness can withstand greater external forces without easily breaking or shattering, so it can be used in many fields, such as automotive parts, home appliance housings, storage boxes, packaging materials and other fields that need to resist external impact. Without sufficient toughness, polypropylene products are prone to breakage or deformation when they collide, fall or change in pressure. In addition, polypropylene itself tends to become brittle in low temperature environments, and polypropylene with poor toughness may break quickly at low temperatures.

[0004] Therefore, improving the toughness of polypropylene is of great significance for expanding its application fields. The present invention aims to overcome the shortcomings of polypropylene, such as poor low-temperature impact resistance and easy aging, by developing a high-toughness polypropylene plastic particle modified material, and improve its overall toughness so that it can maintain good mechanical properties and impact resistance in a wider temperature range. Summary of the invention

[0005] The purpose of the present invention is to provide a high-toughness polypropylene plastic particle modified material to solve the problem of insufficient toughness of polypropylene materials in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solution: a high-toughness polypropylene plastic particle modified material, wherein the components and contents thereof are as follows in terms of mass fraction:

[0007] PP 60-80 parts, mica powder 5-10 parts, long glass fiber 10-20 parts, EVA 10-20 parts, carbon nanotube / TiO2 composite material 2-6 parts, antioxidant 0.5-0.8 parts, inorganic filler 0.6-1 parts, lubricant 0.2-0.5 parts.

[0008] Preferably, the length of the long glass fiber is 5-15 mm.

[0009] Preferably, the antioxidant is one or more of Irgafos 168, Irganox 1010, and BHT.

[0010] Preferably, the inorganic filler is one or more of titanium dioxide, silica ash, and silicate mineral powder.

[0011] Preferably, the lubricant is one or more of paraffin, calcium stearate, and zinc stearate.

[0012] Preferably, the carbon nanotube / TiO2 composite material is prepared by a sol-gel method.

[0013] Preferably, the specific preparation method of the carbon nanotube / TiO2 composite material is as follows:

[0014] Dissolve tetraisopropyl titanate in isopropanol solvent, add appropriate amount of deionized water and acetic acid, stir until hydrolysis is complete, and prepare TiO2 sol;

[0015] Add carbon nanotubes into isopropanol solvent and disperse them ultrasonically for 30 min to 45 min to prepare a CNTs solution;

[0016] The CNTs solution was mixed with the TiO2 sol and ultrasonically oscillated for 45 min-60 min to obtain a carbon nanotube / TiO2 composite material.

[0017] Preferably, the mass ratio of CNTs:TiO2 is 1:(10-50).

[0018] The present invention has at least the following beneficial effects:

[0019] The high-toughness polypropylene plastic particle modified material provided by the present invention has significantly improved toughness, heat resistance, aging resistance and processing performance, and can be widely used in the fields of automotive parts, home appliance casings, storage boxes, packaging materials, etc. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In order to solve the problem of insufficient toughness of polypropylene materials in the prior art, the embodiment of the present invention provides a specific high-toughness polypropylene plastic particle modified material, and the components and contents thereof are as follows in terms of mass fraction:

[0022] PP 60-80 parts, mica powder 5-10 parts, long glass fiber 10-20 parts, EVA 10-20 parts, carbon nanotube / TiO2 composite material 2-6 parts, antioxidant 0.5-0.8 parts, inorganic filler 0.6-1 parts, lubricant 0.2-0.5 parts.

[0023] Furthermore, the length specification of the long glass fiber is 5-15mm; the antioxidant is one or more of Irgafos 168, Irganox1010, and BHT; the inorganic filler is one or more of titanium dioxide, silica ash, and silicate mineral powder; and the lubricant is one or more of paraffin, calcium stearate, and zinc stearate.

[0024] Furthermore, the carbon nanotube / TiO2 composite material is prepared by a sol-gel method, and the specific preparation method is as follows:

[0025] Dissolve tetraisopropyl titanate in isopropanol solvent, add appropriate amount of deionized water and acetic acid, stir until hydrolysis is complete, and prepare TiO2 sol;

[0026] Add carbon nanotubes into isopropanol solvent and disperse them ultrasonically for 30 min to 45 min to prepare a CNTs solution;

[0027] The CNTs solution was mixed with the TiO2 sol and ultrasonically oscillated for 45 min-60 min to obtain a carbon nanotube / TiO2 composite material.

[0028] Among them, the mass ratio of CNTs:TiO2 is 1:(10~50).

[0029] In the present invention, PP is used as a base material to provide basic mechanical properties and thermal stability of the material; mica powder enhances the rigidity and heat resistance of the material; long glass fiber significantly improves the compressive strength and toughness of the material, especially when subjected to external impact, it can effectively disperse stress and prevent the material from breaking; EVA (ethylene-vinyl acetate copolymer) improves the flexibility and processing performance of the material, making the modified polypropylene plastic particles easier to process and shape; the carbon nanotube / TiO2 composite material enhances the mechanical properties and aging resistance of the material through its unique nanostructure, and TiO2 also has a certain ultraviolet shielding effect, further protecting the material from the influence of the external environment; the antioxidant effectively delays the aging process of the material and prolongs the service life; the inorganic filler is used to adjust the density and hardness of the material, and can also improve the thermal stability of the material; the lubricant helps the flow of the material during the processing, reduces energy consumption and improves production efficiency.

[0030] The above components work together to significantly improve the toughness, heat resistance, aging resistance and processing performance of the material prepared by the present invention. It can be widely used in automotive parts, home appliance housings, storage boxes, packaging materials and other fields, and has broad market prospects and application value.

[0031] Based on the above technical solution, the present invention provides the following partial embodiments:

[0032] Example 1

[0033] This embodiment provides a high-toughness polypropylene plastic particle modified material, and the components and contents thereof are as follows in terms of mass fraction:

[0034] PP 60 parts, mica powder 5 parts, long glass fiber 10 parts, EVA 10 parts, carbon nanotube / TiO2 composite material 2 parts, antioxidant 0.5 parts, inorganic filler 0.6 parts, lubricant 0.2 parts.

[0035] Among them, the length specification of long glass fiber is 5-15mm.

[0036] The antioxidant is Irgafos 168; the inorganic filler is titanium dioxide; and the lubricant is paraffin.

[0037] The carbon nanotube / TiO2 composite material is prepared by a sol-gel method, and the specific preparation method is as follows:

[0038] Dissolve tetraisopropyl titanate in isopropanol solvent, add appropriate amount of deionized water and acetic acid, stir until hydrolysis is complete, and prepare TiO2 sol;

[0039] The carbon nanotubes were added into isopropanol solvent and ultrasonically dispersed for 30 min to prepare a CNTs solution;

[0040] The CNTs solution was mixed with the TiO2 sol and subjected to ultrasonic oscillation for 45 min to prepare a carbon nanotube / TiO2 composite material.

[0041] Among them, the mass ratio of CNTs:TiO2 is 1:10.

[0042] Example 2

[0043] This embodiment provides a high-toughness polypropylene plastic particle modified material, and the components and contents thereof are as follows in terms of mass fraction:

[0044] PP 70 parts, mica powder 8 parts, long glass fiber 15 parts, EVA 15 parts, carbon nanotube / TiO2 composite material 4 parts, antioxidant 0.7 parts, inorganic filler 0.9 parts, lubricant 0.3 parts.

[0045] Among them, the length specification of long glass fiber is 5-15mm.

[0046] The antioxidant is Irganox 1010; the inorganic filler is silica fume; and the lubricant is calcium stearate.

[0047] The carbon nanotube / TiO2 composite material is prepared by a sol-gel method, and the specific preparation method is as follows:

[0048] Dissolve tetraisopropyl titanate in isopropanol solvent, add appropriate amount of deionized water and acetic acid, stir until hydrolysis is complete, and prepare TiO2 sol;

[0049] The carbon nanotubes were added into isopropanol solvent and ultrasonically dispersed for 40 min to prepare a CNTs solution;

[0050] The CNTs solution was mixed with the TiO2 sol and ultrasonically vibrated for 50 min to prepare a carbon nanotube / TiO2 composite material.

[0051] Among them, the mass ratio of CNTs:TiO2 is 1:30.

[0052] Example 3

[0053] This embodiment provides a high-toughness polypropylene plastic particle modified material, and the components and contents thereof are as follows in terms of mass fraction:

[0054] PP 80 parts, mica powder 10 parts, long glass fiber 20 parts, EVA 20 parts, carbon nanotube / TiO2 composite material 6 parts, antioxidant 0.8 parts, inorganic filler 1 part, lubricant 0.5 parts.

[0055] Among them, the length specification of long glass fiber is 5-15mm.

[0056] The antioxidant is BHT; the inorganic filler is silicate mineral powder; and the lubricant is zinc stearate.

[0057] The carbon nanotube / TiO2 composite material is prepared by a sol-gel method, and the specific preparation method is as follows:

[0058] Dissolve tetraisopropyl titanate in isopropanol solvent, add appropriate amount of deionized water and acetic acid, stir until hydrolysis is complete, and prepare TiO2 sol;

[0059] The carbon nanotubes were added into isopropanol solvent and ultrasonically dispersed for 45 min to prepare a CNTs solution;

[0060] The CNTs solution was mixed with the TiO2 sol and subjected to ultrasonic oscillation for 60 min to prepare a carbon nanotube / TiO2 composite material.

[0061] Among them, the mass ratio of CNTs:TiO2 is 1:50.

[0062] The materials prepared in the above examples 1-3 were tested for various properties, and the results are as follows:

[0063] Example 1 Example 2 Example 3 Impact toughness <![CDATA[16.8KJ / m 2 ]]> <![CDATA[17.3KJ / m 2 ]]> <![CDATA[17.5KJ / m 2 ]]> Tensile Strength 44MPa 47MPa 49MPa Elongation at break 13.6％ 12.9％ 11.7％ Heat Deflection Temperature ＞120℃ ＞120℃ ＞120℃

[0064] The above shows and describes the basic principles, main features and advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-toughness polypropylene plastic particle modified material, characterized in that: The components and contents are as follows: PP 60-80 parts, mica powder 5-10 parts, long glass fiber 10-20 parts, EVA 10-20 parts, carbon nanotube / TiO2 composite material 2-6 parts, antioxidant 0.5-0.8 parts, inorganic filler 0.6-1 parts, lubricant 0.2-0.5 parts.

2. The high-toughness polypropylene plastic particle modified material according to claim 1, characterized in that: The length specification of the long glass fiber is 5-15 mm.

3. The high-toughness polypropylene plastic particle modified material according to claim 1, characterized in that: The antioxidant is one or more of Irgafos 168, Irganox 1010 and BHT.

4. The high-toughness polypropylene plastic particle modified material according to claim 1, characterized in that: The inorganic filler is one or more of titanium dioxide, silica ash, and silicate mineral powder.

5. The high-toughness polypropylene plastic particle modified material according to claim 1, characterized in that: The lubricant is one or more of paraffin, calcium stearate and zinc stearate.

6. The high-toughness polypropylene plastic particle modified material according to claim 1, characterized in that: The carbon nanotube / TiO2 composite material is prepared by a sol-gel method.

7. The high-toughness polypropylene plastic particle modified material according to claim 6, characterized in that: The specific preparation method of the carbon nanotube / TiO2 composite material is as follows: Dissolve tetraisopropyl titanate in isopropanol solvent, add appropriate amount of deionized water and acetic acid, stir until hydrolysis is complete, and prepare TiO2 sol; Add carbon nanotubes into isopropanol solvent and disperse them ultrasonically for 30 min to 45 min to prepare a CNTs solution; The CNTs solution was mixed with the TiO2 sol and ultrasonically oscillated for 45 min-60 min to obtain a carbon nanotube / TiO2 composite material.

8. The high-toughness polypropylene plastic particle modified material according to claim 7, characterized in that: The mass ratio of CNTs:TiO2 is 1:(10-50).