CN116218093A - Polystyrene composition and preparation method and application thereof - Google Patents
Polystyrene composition and preparation method and application thereof Download PDFInfo
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- CN116218093A CN116218093A CN202211691134.3A CN202211691134A CN116218093A CN 116218093 A CN116218093 A CN 116218093A CN 202211691134 A CN202211691134 A CN 202211691134A CN 116218093 A CN116218093 A CN 116218093A
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions 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 an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
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Abstract
The invention relates to the technical field of modified plastics, and particularly discloses a polystyrene composition, a preparation method and application thereof. The polystyrene composition comprises the following components in parts by weight: 60-80 parts of polystyrene, 10-25 parts of toughening agent, 2-30 parts of self-cleaning agent, 0.1-0.5 part of hydrophobic agent, 2-10 parts of hydrophobic synergist and 0.1-1 part of lubricant; the self-cleaning agent is polyethylene; the hydrophobic synergist is a two-dimensional lamellar inorganic material. The invention utilizes the mutual cooperation of the self-cleaning agent, the hydrophobic agent with the function of reducing the surface energy of the material, the hydrophobic synergist and the lubricant to ensure that the contact angle of the polystyrene composition is increased, so that the polystyrene composition has excellent self-cleaning performance and hydrophobic performance, and oil stains are difficult to remain on the surface. In practical application, the polystyrene composition has good waterproof and antifouling properties, and keeps good appearance for a long time in use.
Description
Technical Field
The invention relates to the technical field of modified plastics, in particular to a polystyrene composition and a preparation method and application thereof.
Background
Polystyrene is the third largest variety of general plastic, the English name is polystyrene, the abbreviation is PS, and polystyrene has the advantages of good transparency, good formability, good rigidity, easy dyeing, low hygroscopicity, low price and the like, and has been widely applied to industries of packaging, electronics, buildings, automobile home appliances, instruments, daily necessities, toys and the like.
However, polystyrene is brittle and has low impact strength, so increasing its toughness has been an important study of PS modification. In addition, with the acceleration of modern life pace and the increase of consumer demand, there is a corresponding demand for antifouling properties of materials. For example, automotive parts, during use of the automobile, exterior trim is easily contaminated by dirt and rain water; the interior decoration is easy to be polluted by sweat, food oil stain, cosmetics and the like; the residual greasy dirt can corrode the surface of the part, so that the surface of the plastic part is damaged or even destroyed; in addition, materials such as toilet and bathroom products, particularly the seat parts thereof, are required to have self-cleaning, high-gloss properties. Thus, the self-cleaning properties of the material are also important properties to consider.
At present, the self-cleaning polypropylene material has low overall mechanical properties such as rigidity and toughness, and has poor dimensional stability. There is a need to develop a self-cleaning polystyrene composition that is not suitable for some scenes where mechanical properties and dimensions are high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a polystyrene composition, a preparation method and application thereof. According to the invention, the self-cleaning agent, the water repellent synergist and the lubricant are added into the polystyrene composition, and the self-cleaning performance and the impact toughness of the polystyrene composition are improved by mutual cooperation of the self-cleaning agent, the water repellent synergist and the lubricant.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the invention provides a polystyrene composition, which comprises the following components in parts by weight:
60-80 parts of polystyrene, 10-25 parts of toughening agent, 2-30 parts of self-cleaning agent, 0.1-0.5 part of hydrophobic agent, 2-10 parts of hydrophobic synergist and 0.1-1 part of lubricant;
the self-cleaning agent is polyethylene; the hydrophobic synergist is a two-dimensional lamellar inorganic material.
According to the invention, the self-cleaning agent is added into the polystyrene composition, the fluidity of the self-cleaning agent is higher than that of polystyrene, and certain incompatibility exists between two phases, so that the self-cleaning agent can be separated out on the surface of the polystyrene composition in the process of processing and injection molding, and a convex structure is formed. The water repellent agent can also form a film on the outer surface of the polystyrene composition, so that the surface energy of the polystyrene composition is remarkably reduced, and thus the water repellent performance is shown. In addition, air present in the void structure of the hydrophobic synergist tends to form an air cushion, which is beneficial to reduce interfacial interactions, thereby reducing the roll angle of the polystyrene composition surface. The self-cleaning agent, the hydrophobic agent with reduced material surface energy, the hydrophobic synergist and the lubricant are mutually cooperated, so that the contact angle of the polystyrene composition is increased, wherein the addition of the lubricant is beneficial to the self-cleaning agent and the hydrophobic agent to be separated out to the surface of the composition along with the lubricant, thereby playing a good waterproof and dirt-preventing role, so that the polystyrene composition has excellent self-cleaning performance and hydrophobic performance, oil stains are difficult to remain on the surface, and the polystyrene composition has good waterproof and dirt-preventing performance in practical application, and keeps good appearance for a long time in use.
Meanwhile, the toughening agent and the self-cleaning agent are compounded, so that the impact toughness of the polystyrene composition can be improved, and the polystyrene composition has better self-cleaning performance and mechanical property.
As a preferred embodiment of the polystyrene composition of the present invention,
the polystyrene has a melt index of 3-15g/min under the conditions of a test temperature of 200 ℃ and a load of 5 kg.
As a preferred embodiment of the polystyrene composition of the present invention, the self-cleaning agent is 10 to 25 parts, the water repellent agent is 0.2 to 0.4 part, the water repellent synergist is 3 to 8 parts, and the lubricant is 0.2 to 0.8 part.
When the polystyrene composition is selected from the components in the weight part range, the contact angle of the composition can be better increased, and the self-cleaning performance of the polystyrene composition is further improved.
As a preferred embodiment of the polystyrene composition of the present invention, the polyethylene has a density of 0.922g/cm 3 ～0.957g/cm 3 Preferably, the polyethylene has a density of 0.945g/cm 3 ～0.955g/cm 3 。
As a preferred embodiment of the polystyrene composition of the present invention, the polyethylene is tested by using a test standard of ISO1133-2011, and the melt index under the conditions of 190 ℃ and 2.16kg load is 0.4-7.6 g/10min; preferably, the melt index is 0.8 to 3g/10min.
When the self-cleaning agent is polyethylene with the density and the melt index in the above range, the fluidity is higher than that of polystyrene, and certain incompatibility exists between two phases, the self-cleaning agent can be precipitated on the surface of the polystyrene in the process of processing and injection molding, so that a convex structure is formed. The self-cleaning agent can reduce the contact surface of water and the polystyrene composition, and can reduce the charge effect of the water and the polystyrene composition, thereby achieving good self-cleaning effect.
When water contacts with the polystyrene composition, the raised structure formed on the surface can prop up the water, water drops can not infiltrate the middle of the protrusions, the middle is filled with air, the contact surface of the water and the polystyrene composition can be greatly reduced, and then the effect of charge attraction can be reduced. At the same time, the distance between the water and the polystyrene composition is also pulled (one more protrusion distance). Water is a polar molecule, and the self-cleaning agent is a nonpolar crystalline substance.
When the density is selected, the self-cleaning agent can be separated out on the surface of the material due to the difference of fluidity and compatibility between the self-cleaning agent and the polystyrene, so that the contact surface between water and the polystyrene composition can be better reduced when the density is selected, and the self-cleaning agent is a nonpolar substance, so that the charge effect of the water and the polystyrene composition can be reduced, and the self-cleaning performance of the polystyrene composition can be better improved.
As a preferred embodiment of the polystyrene composition of the present invention, the hydrophobic agent is a fluorocarbon surfactant including at least one of an anionic fluorocarbon surfactant, a cationic fluorocarbon surfactant, a nonionic fluorocarbon surfactant, an amphoteric fluorocarbon surfactant, a silicon-containing fluorocarbon surfactant, a hybrid surfactant, a long-chain surfactant, and a hydrophilic group-free fluorocarbon surfactant.
In the invention, the hydrophobic agent is a fluorocarbon surfactant which has extremely low surface energy and waterproof performance, and the fluorocarbon surfactant is added into the polystyrene composition, so that a layer of film is formed on the outer surface of the polystyrene composition, and fluorine-containing long side chains can be stretched at the interface and directionally arranged, so that the performance of the polystyrene composition is kept stable; at the same time, the surface energy of the polystyrene composition is significantly reduced, exhibiting hydrophobic properties. When other low surface energy substances such as polypropylene substances are added, the substances are incompatible with the polystyrene system, and the product has layering phenomenon.
As a preferred embodiment of the polystyrene composition of the present invention, the inorganic material includes talc or mica.
The invention aims to modify the polystyrene composition, when the hydrophobic synergist is a two-dimensional lamellar inorganic material, the two-dimensional lamellar inorganic material has larger void ratio, and when water drops contact the surface of the polystyrene composition in a high-temperature and high-humidity environment, air in the void structure is easy to form an air cushion, which is beneficial to reducing interface interaction, thereby reducing the rolling angle of the surface of the polystyrene composition.
As a preferred embodiment of the polystyrene composition of the present invention, the lubricant is one or more of paraffin wax, stearic acid, butyl stearate, oleamide or ethylene bis stearamide. Preferably, the lubricant is ethylene bis-stearamide.
According to the invention, the lubricant is added into the polystyrene composition, so that the lubricant is precipitated on the surface of the polystyrene composition, the moisture is further blocked, and the pollution of the external environment to the polystyrene composition is reduced.
As a preferred embodiment of the polystyrene composition of the present invention, the polystyrene is high impact polystyrene HIPS and/or GPPS plastic.
As a preferred embodiment of the polystyrene composition of the present invention, the toughening agent is a styrene-butadiene-styrene block copolymer, and the content of butadiene in the styrene-butadiene-styrene block copolymer is 50% to 80%, preferably 70%.
The second object of the present invention is to provide a method for preparing the above polystyrene composition, comprising the steps of:
1) Weighing the components in parts by weight;
2) Polystyrene, a toughening agent, a self-cleaning agent, a water repellent synergist and a lubricant are mixed and fed into a main feeding port of a double-screw extruder, and extruded and granulated to prepare the polystyrene composition.
The third object of the invention is to provide the application of the polystyrene composition in household appliances, OA equipment, audio-visual equipment and electric vehicle products.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a polystyrene composition, a preparation method and application thereof, wherein a self-cleaning agent is added into the polystyrene composition, so that on one hand, the contact surface between water and the polystyrene composition can be better reduced, and on the other hand, the self-cleaning agent is a nonpolar substance, the charge effect of the water and the polystyrene composition can be reduced, and the self-cleaning performance of the polystyrene composition can be better improved. The invention utilizes the mutual cooperation of the self-cleaning agent, the hydrophobic agent with the function of reducing the surface energy of the material, the hydrophobic synergist and the lubricant to ensure that the contact angle of the polystyrene composition is increased, so that the polystyrene composition has excellent self-cleaning performance and hydrophobic performance, and oil stains are difficult to remain on the surface. In practical application, the polystyrene composition has good waterproof and antifouling properties, and keeps good appearance for a long time in use.
Detailed Description
For a better description of the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to the following specific examples.
In the following examples and comparative examples, the experimental methods used were conventional methods unless otherwise specified, and the materials, reagents and the like used, unless otherwise specified, were all commercially available.
The raw material sources of the following examples and comparative examples are as follows:
polystyrene: GPPS plastic, the model of which is GPPS 123P, has a melt index of 7g/min under the conditions of a test temperature of 200 ℃ and a load of 5kg, and the manufacturer is Shanghai Saiaceae;
toughening agent: styrene-butadiene-styrene block copolymer, the content of butadiene in the styrene-butadiene-styrene block copolymer is 70%, the model is SBS 792E, and the manufacturer is Baling petrochemical;
self-cleaning agent 1: polyethylene, model Aceso PEM 2408, density 0.922g/cm 3 The melt index is 0.4g/10min under the conditions of 190 ℃ and 2.16kg load, the test standard is ISO1133-2011, and the manufacturer is TotalEnergies company;
self-cleaning agent 2: polyethylene, model TR-144, density 0.945g/cm 3 The melt index is 0.8g/10min under the conditions of 190 ℃ and 2.16kg load, the test standard is ISO1133-2011, and the manufacturer is a luxuriant petrochemical industry;
self-cleaning agent 3: polyethylene, model ACCUCOMP HD0202L, density of 0.955g/cm 3 The melt index is 3g/10min under the conditions of 190 ℃ and 2.16kg load, the test standard is ISO1133-2011, and the manufacturer is LyondellBasell Industries company;
self-cleaning agent 4: polyethylene, model HDPE FHC7260, density of 0.957g/cm 3 The melt index is 7.6g/10min under the conditions of 190 ℃ and 2.16kg load, the test standard is ISO1133-2011, and the manufacturer is smooth and petrochemical;
self-cleaning agent 5: polyethylene, model HDPE 5000S, density of 0.950g/cm 3 The melt index is 1.1g/10min under the conditions of 190 ℃ and 2.16kg load, the test standard is ISO1133-2011, and the manufacturer is Daqing petrochemical industry;
self-cleaning agent 6: polyethylene, model LDPE 1c7a, density 0.918g/cm 3 The melt index is 9.5g/10min under the conditions of 190 ℃ and 2.16kg load, the test standard is ISO1133-2011, and the manufacturer is Dandall in France;
self-cleaning agent 7: polyethylene, model HDPE 2911, density of 0.960g/cm 3 The melt index is 20g/10min under the conditions of 190 ℃ and 2.16kg load, the test standard is ISO1133-2011, and the manufacturer is smooth and petrochemical;
hydrophobing agent: nonionic fluorocarbon surfactant, capstone FS-3100 of kemu, manufacturer us kemu;
hydrophobic synergist: talcum powder TYT-777A is a sea city additive chemical industry limited liability company;
and (3) a lubricant: ethylene bis stearamide, available from norjia plasticization limited, dongguan.
Examples 1 to 11 and comparative examples 1 to 6
Examples 1 to 11 and comparative examples 1 to 6 provide polystyrene compositions, the formulations of which in parts by weight of tumor are shown in Table 1, and the preparation method thereof is as follows:
1) Adding polystyrene, a toughening agent, a self-cleaning agent, a hydrophobic synergist and a lubricant into a premixing machine according to parts by weight, and mixing for 6-8 min to obtain a mixture;
2) Feeding the mixture into a double-screw extruder from a main feeding port, wherein the length-diameter ratio of the double-screw extruder is 35:1, extruding and granulating after mixing and melting and homogenization, and setting the temperature of the double-screw extruder according to the following steps: the temperature of the first area is 80-100 ℃, the temperature of the second area to the fourth area is 150-170 ℃, the temperature of the fifth area to the eighth area is 170-190 ℃, the temperature of the ninth area is 190-200 ℃, and the rotation speed of the host machine is 500-700 rpm, so that the polystyrene composition is prepared.
The polystyrene compositions prepared in examples 1 to 11 and comparative examples 1 to 6 were subjected to performance tests, each of which was as follows:
1) Notched Izod impact Strength (KJ/m) 2 ): tested according to ISO 180-2019;
2) Contact angle (°): tested according to GB/T30693-2014.
The test results are shown in Table 2.
TABLE 2
Conclusion:
as can be seen from the data in Table 2, the contact angle of the polystyrene composition of the present invention can reach 103-115 degrees, and the notched Izod impact strength can reach 8.5-28.3 KJ/m 2 More preferably polyphenylThe contact angle of the ethylene composition can reach 110-115 degrees, and the notch impact strength of the cantilever beam can reach 22.3-28.3 KJ/m 2 。
Examples 5-9 used polyethylenes having different densities and different melt flow rates, respectively, and the polystyrene compositions prepared in example 5 had better mechanical and hydrophobic properties than the polystyrene compositions prepared in examples 7-9, and the polystyrene compositions prepared in examples 7-8 had better properties than the polystyrene compositions prepared in examples 6, 9. The impact properties of the polystyrene compositions of examples 5 to 9 were better than those of examples 10 to 11, and the contact angles of the polystyrene compositions of examples 5 to 9 were greater than those of examples 10 to 11.
The formula of the comparative example 1 does not contain a self-cleaning agent, the formula of the comparative example 2 does not contain a toughening agent, the impact performance is obviously reduced, and the toughening agent and the self-cleaning agent are compounded to help improve the toughness of the material. In addition, the contact angle of comparative example 1 is small, and the hydrophobic effect is poor; comparative example 2 was too poor in impact although the hydrophobic effect was also possible.
It can be seen from comparative examples 3-5 that the removal of the hydrophobe or filler or lubricant from the formulation, but all significantly reduced the contact angle of the composition, resulting in poor hydrophobic properties.
After the polyethylene of comparative example 6 is greatly increased, the compatibility of polystyrene/polyethylene is deteriorated, and the mechanical property and the hydrophobic property are remarkably reduced.
The self-cleaning agent is added into the polystyrene composition, the fluidity of the self-cleaning agent is higher than that of polystyrene, and certain incompatibility exists between two phases, so that the self-cleaning agent can be precipitated on the surface of the polystyrene composition in the process of processing and injection molding to form a convex structure. Therefore, the self-cleaning agent, the hydrophobic agent with the function of reducing the surface energy of the material, the hydrophobic synergist and the lubricant are used for mutual cooperation, so that the contact angle of the polystyrene composition is increased, the polystyrene composition has excellent self-cleaning performance and hydrophobic performance, and oil stains are difficult to remain on the surface. In practical application, the polystyrene composition has good waterproof and antifouling properties, and keeps good appearance for a long time in use.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted equally without departing from the spirit and scope of the technical solution of the present invention.
Claims (10)
1. The polystyrene composition is characterized by comprising the following components in parts by weight:
60-80 parts of polystyrene, 10-25 parts of toughening agent, 2-30 parts of self-cleaning agent, 0.1-0.5 part of hydrophobic agent, 2-10 parts of hydrophobic synergist and 0.1-1 part of lubricant;
the self-cleaning agent is polyethylene; the hydrophobic synergist is a two-dimensional lamellar inorganic material.
2. The polystyrene composition according to claim 1, wherein the self-cleaning agent is 10 to 25 parts, the water repellent agent is 0.2 to 0.4 parts, the water repellent synergist is 3 to 8 parts, and the lubricant is 0.2 to 0.8 parts.
3. The polystyrene composition of claim 1, wherein said polyethylene has a density of 0.922g/cm 3 ～0.957g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the Preferably, the polyethylene has a density of 0.945g/cm 3 ～0.955g/cm 3 。
4. The polystyrene composition of claim 1, wherein the polyethylene has a melt index of 0.4 to 7.6g/10min at 190 ℃ and a load of 2.16kg, as measured by the test standard ISO 1133-2011; preferably, the melt index is 0.8 to 3g/10min.
5. The polystyrene composition of claim 1, wherein the hydrophobic agent is a fluorocarbon surfactant comprising at least one of an anionic fluorocarbon surfactant, a cationic fluorocarbon surfactant, a nonionic fluorocarbon surfactant, an amphoteric fluorocarbon surfactant, a silicon-containing fluorocarbon surfactant, a hybrid surfactant, a long chain surfactant, and a non-hydrophilic fluorocarbon surfactant.
6. The polystyrene composition of claim 1, wherein the inorganic material comprises talc or mica.
7. The polystyrene composition of claim 1, wherein the lubricant is one or more of paraffin, stearic acid, butyl stearate, oleamide, or ethylenebisstearamide.
8. The polystyrene composition of claim 1, wherein the polystyrene is a high impact polystyrene or GPPS plastic.
9. A process for preparing the polystyrene composition according to any one of claims 1 to 8, comprising the steps of:
1) Weighing the components in parts by weight;
2) Polystyrene, a toughening agent, a self-cleaning agent, a water repellent synergist and a lubricant are mixed and fed into a main feeding port of a double-screw extruder, and extruded and granulated to prepare the polystyrene composition.
10. Use of the polystyrene composition according to any one of claims 1 to 8 in household appliances, OA equipment, audiovisual equipment, electric vehicle products.
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