CN109135085B - Environment-friendly flame-retardant polystyrene composite material and preparation method thereof - Google Patents
Environment-friendly flame-retardant polystyrene composite material and preparation method thereof Download PDFInfo
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- CN109135085B CN109135085B CN201810841124.0A CN201810841124A CN109135085B CN 109135085 B CN109135085 B CN 109135085B CN 201810841124 A CN201810841124 A CN 201810841124A CN 109135085 B CN109135085 B CN 109135085B
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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
- 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
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/06—Polystyrene
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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
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
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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
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention discloses an environment-friendly flame-retardant polystyrene composite material which comprises the following components in parts by weight: 60-96 parts of PS resin, 0.1-20 parts of flame retardant and 0.1-20 parts of flame retardant synergist; wherein the flame retardant is at least one of decabromodiphenylethane, brominated epoxy resin, brominated triazine, ethylenebistetrabromophthalimide, tetrabromobisphenol A and octabromoether; the flame-retardant synergist is at least one of antimony trioxide and talcum powder. In the environment-friendly flame-retardant polystyrene composite material, the composite material has better flame retardance through the synergistic effect of the flame retardant and the flame-retardant synergist; meanwhile, the compatilizer and the toughening agent are added, so that the composite material has better yellowing resistance and toughness. Meanwhile, the invention also discloses a preparation method of the environment-friendly flame-retardant polystyrene composite material.
Description
Technical Field
The invention relates to a polystyrene composite material and a preparation method thereof, in particular to an environment-friendly flame-retardant polystyrene composite material and a preparation method thereof.
Background
In the modern society, the requirement for the fire-proof safety of materials is higher and higher. Because the common flame retardants such as decabromodiphenyl ether generate a large amount of black smoke when being combusted, and even generate dioxin which is a strong carcinogen and cause great harm to human bodies, laws and regulations are generally issued in various countries to limit the use of certain flame retardants. In the field of household appliances and the like, there is a risk of short-circuit ignition due to contact with electricity, and thus flame retardancy is required for the material.
The fire retardant used by the common environment-friendly flame-retardant PS system has the defects of easy decomposition and easy yellowing, and the use of the fire retardant in light-colored products is limited. Meanwhile, the addition of the flame retardant causes the reduction of partial physical properties, particularly notch impact strength, and the toughening treatment is required.
Disclosure of Invention
Based on the above, the invention aims to overcome the defects of the prior art and provide an environment-friendly flame-retardant polystyrene composite material.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: an environment-friendly flame-retardant polystyrene composite material comprises the following components in parts by weight: 60-96 parts of PS resin, 0.1-20 parts of flame retardant and 0.1-20 parts of flame retardant synergist; wherein the flame retardant is at least one of decabromodiphenylethane, brominated epoxy resin, brominated triazine, ethylenebistetrabromophthalimide, tetrabromobisphenol A and octabromoether; the flame-retardant synergist is at least one of antimony trioxide and talcum powder.
In the environment-friendly flame-retardant polystyrene composite material, the flame retardant and the flame-retardant synergist jointly play a role in bromine-antimony gas phase synergy, when a workpiece is burnt, the bromine-antimony flame retardant is decomposed before plastic to generate inert gas which is attached to the surface of the workpiece to insulate heat and oxygen, so that the burning is inhibited; and further the composite material has better flame retardant property.
In addition, the flame retardant performance is improved due to the increase of the content of the flame retardant, and when the content of the flame retardant is lower, the amount of inert gas generated during combustion is less, so that the contact between resin and oxygen cannot be completely blocked, and the combustion cannot be completely inhibited; the addition of the flame retardant needs to reach a certain content, and the contact between the resin and oxygen can be completely isolated when the generated inert gas reaches a saturated or supersaturated state, so that the combustion is inhibited.
Preferably, the flame retardant is ethylenebistetrabromophthalimide; the flame-retardant synergist is antimony trioxide.
The flame retardant and the flame retardant synergist act together, so that the gas-phase synergistic effect of the bromine and the antimony can be better exerted, and a better flame retardant effect is achieved.
Preferably, the weight part of the flame retardant is 5-20 parts, and the weight part of the flame retardant synergist is 0.1-20 parts.
Preferably, the environment-friendly flame-retardant polystyrene composite material further comprises 0-20 parts by weight of a toughening agent, wherein the toughening agent is SBS. The toughening agent has good compatibility with PS and high toughening efficiency.
Preferably, the environment-friendly flame-retardant polystyrene composite material further comprises 0-20 parts by weight of a compatilizer, wherein the compatilizer is a styrene-maleic anhydride copolymer.
More preferably, the compatibilizer is 0 to 5 parts by weight.
Preferably, the PS resin is at least one of HIPS resin, GPPS resin and EPS resin.
Preferably, the environment-friendly flame-retardant polystyrene composite material further comprises 0.1-2 parts by weight of an auxiliary agent, wherein the auxiliary agent is at least one of an antioxidant, an anti-dripping agent, a lubricant and a light stabilizer.
Meanwhile, the invention also provides a preparation method of the environment-friendly flame-retardant polystyrene composite material, which comprises the following steps:
the components are uniformly mixed to obtain a premix, and the premix is subjected to melt mixing and extrusion granulation to obtain the environment-friendly flame-retardant polystyrene composite material.
Compared with the prior art, the invention has the beneficial effects that:
in the environment-friendly flame-retardant polystyrene composite material, the composite material has better flame retardance through the synergistic effect of the flame retardant and the flame-retardant synergist; meanwhile, due to the used flame retardant, imine free radicals are generated during combustion, and the flame retardant has oxidability and can inhibit the material from yellowing; and a compatilizer and a toughening agent are added, so that the composite material has better toughness.
The common environment-friendly bromine flame retardant is decomposed in preference to resin during combustion to generate a large amount of inert gas to cover the surface of the resin and isolate oxygen, so that combustion is inhibited, and most of the environment-friendly bromine flame retardants are easy to oxidize and turn yellow. Most of free radicals generated by the combustion chain reaction of the flame retardant are antimony bromide free radicals and bromine hydrocarbon free radicals, and the addition of ethylene bistetrabromophthalimide can generate imine free radicals, has oxidability, captures free radicals during combustion and prevents oxidation and yellowing.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.
The method for testing each performance index in the embodiment of the invention comprises the following steps:
tensile strength: ISO 527
Elongation at break: ISO 527
Flexural modulus: ISO 178
Bending strength: ISO 178
Izod impact strength (notched): ISO 180
Vertical burning (flame retardant property): UL-94V
The invention is provided with examples 1-10 and comparative examples 1-2, the content (in parts by weight) of each component in specific examples 1-10 and comparative examples 1-2 is shown in table 1, wherein the selection of the auxiliary components is the same, and the selection of the specific components can be routinely selected by a person skilled in the art according to actual conditions. Wherein the PS resin is at least one of HIPS resin, GPPS resin and EPS resin; the flame retardant is at least one of decabromodiphenylethane, bromotriazine and ethylene bistetrabromophthalimide; the flame-retardant synergist is at least one of antimony trioxide and talcum powder; the toughening agent is SBS; the compatilizer is styrene-maleic anhydride copolymer (SMA).
TABLE 1 contents of respective components in examples 1 to 10 and comparative examples 1 to 2
The results of each performance test in examples 1 to 10 and comparative examples 1 to 2 are shown in table 2:
TABLE 2 results of the respective performance tests in examples 1 to 10 and comparative examples 1 to 2
In summary, as can be seen from table 2, in the environment-friendly flame retardant polystyrene composite material of the present invention, the composite material has good flame retardancy due to the synergistic effect of the flame retardant and the flame retardant synergist; meanwhile, the compatilizer and the toughening agent are added in a matching manner, so that the composite material has better toughness.
Comparing the example 1 with the examples 4 to 5, it can be seen that the flame retardant in the example 1 is ethylenebistetrabromophthalimide, the flame retardant synergist is antimony trioxide, and the flame retardant performance of the polystyrene composite material in the example 1 is superior to that in the examples 4 to 5, which indicates that the flame retardant in the application is preferably ethylenebistetrabromophthalimide, and the flame retardant synergist is preferably antimony trioxide, so that the polystyrene composite material has better flame retardant performance and better impact strength.
Meanwhile, comparing the example 1 with the comparative examples 1-2, the comparative example 1 only contains the flame retardant and does not contain the synergistic flame retardant, and the comparative example 2 only contains the synergistic flame retardant and does not contain the flame retardant; the flame retardant effects of the comparative examples 1-2 are all inferior to the flame retardant effect of the example 1, which shows that the flame retardant and the synergistic flame retardant in the polystyrene composite material provided by the invention act together to endow the composite material with a better flame retardant effect.
Comparing the example 1 with the examples 9-10, the addition of GPPS and EPS can cause a certain reduction in the impact performance of the composite material; but will result in an increase in the flexural strength and flexural modulus of the composite material. At the same time, will
The same applies to the overall comparison of examples 2, 3 and 6 with examples 1, 4 and 5, and the comparison of example 5 with example 6. But the composite material can be endowed with better comprehensive performance by adding the toughening agent, the compatilizer and the like; therefore, in the formula of the environment-friendly flame-retardant polypropylene composite material, the components act together, and the composite material with uniform impact strength, mechanical property and flame retardant property and application value can be obtained only by selecting proper addition amount.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (2)
1. The environment-friendly flame-retardant polystyrene composite material is characterized by comprising the following components in parts by weight: 60-96 parts of PS resin, 5-20 parts of flame retardant, 0.1-20 parts of flame retardant synergist, 0-20 parts of toughening agent, 0-5 parts of compatilizer and 0.1-2 parts of auxiliary agent; wherein the PS resin is at least one of HIPS resin and GPPS resin; the flame retardant is ethylene bistetrabromophthalimide; the flame-retardant synergist is antimony trioxide, and the toughening agent is SBS; the compatilizer is styrene-maleic anhydride copolymer; the auxiliary agent is at least one of an antioxidant, an anti-dripping agent, a lubricant and a light stabilizer.
2. The preparation method of the environment-friendly flame-retardant polystyrene composite material as claimed in claim 1, wherein the method comprises the following steps:
uniformly mixing the components to obtain a premix, and carrying out melt mixing and extrusion granulation on the premix to obtain the environment-friendly flame-retardant polystyrene composite material.
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| CN109135085B true CN109135085B (en) | 2021-06-15 |
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| CN111704779A (en) * | 2019-03-18 | 2020-09-25 | 海信视像科技股份有限公司 | Television shell, preparation method thereof and television |
| CN113881152B (en) * | 2021-09-24 | 2024-03-15 | 江苏金发科技新材料有限公司 | Transparent flame-retardant master batch as well as preparation method and application thereof |
| CN114525018B (en) * | 2021-12-27 | 2023-03-14 | 珠海鑫科高分子材料有限公司 | Copolyester micro-foaming flame-retardant material and preparation method thereof |
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