CN111763379A - High-light-transmittance and light-weight polypropylene composite material and preparation method thereof - Google Patents
High-light-transmittance and light-weight polypropylene composite material and preparation method thereof Download PDFInfo
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- CN111763379A CN111763379A CN202010689183.8A CN202010689183A CN111763379A CN 111763379 A CN111763379 A CN 111763379A CN 202010689183 A CN202010689183 A CN 202010689183A CN 111763379 A CN111763379 A CN 111763379A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/02—Internal Trim mouldings ; Internal Ledges; Wall liners for passenger compartments; Roof liners
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/04—External Ornamental or guard strips; Ornamental inscriptive devices thereon
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- 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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/004—Additives being defined by their length
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
Abstract
The invention discloses a high-light-transmittance and light-weight polypropylene composite material which comprises the following components in parts by weight: 50-90 parts of PP resin, 4-35 parts of a toughening agent, 4-30 parts of a filler and 0.2-4 parts of an auxiliary agent; the PP resin is PP rigid resin, the light transmittance of a 2mm square plate is not lower than 55%, and the weight of the two-dimensional filler in the polypropylene composite material is lower than 10 parts. According to the invention, high light transmittance and rigidity-toughness balance of a resin system are realized by selecting high light transmittance PP, a high rigidity PP matrix and a styrene elastomer with a refractive index similar to that of PP; the invention also discloses a preparation method of the high-light-transmission and light-weight polypropylene composite material.
Description
Technical Field
The invention relates to the field of modification of high polymer materials, in particular to a high-light-transmittance and light-weight polypropylene composite material and a preparation method thereof.
Background
The polypropylene (PP) is used as a general plastic with high cost performance, has excellent mechanical properties after toughening and modification, is simple and convenient to form and process, and is widely applied to household appliances and automobile products.
With the development of internet technology and electronic technology, interior and exterior trim surfaces become decorative surfaces with a design feel, and the decoration and the functionality are integrated, which puts forward a new requirement on light transmission for vehicle materials. Polycarbonate (PC) and polymethyl methacrylate (PMMA) are two types of conventional transparent polymer materials. However, PC has poor fluidity, so that large parts are difficult to be injection molded, and PMMA has poor toughness, so that the high toughness requirements of many parts cannot be met. The traditional polypropylene interior and exterior materials for vehicles are usually prepared by blending raw materials such as polypropylene, elastomer, talcum powder and the like through processing equipment such as a double-screw extruder and the like. However, this conventional solution causes major problems of light reflection, light absorption and light scattering. Therefore, although the modified PP has advantages of high flowability and high impact, the light transmittance of the conventional modified PP material is not high.
PP materials for vehicles are often required to meet the requirements of high rigidity and high toughness at the same time. With the improvement of energy conservation and emission reduction requirements and the development of electric automobiles, the light weight technology of the automobiles attracts more and more attention. One trend in weight reduction of automobiles is thinning of the parts, which requires materials with high rigidity and high toughness to meet the application requirements of the parts in external pressure and impact. Another trend in weight reduction of automobiles is to reduce the density of materials, i.e., to reduce the density of materials while maintaining the rigidity and toughness of the materials. In order to meet the requirement of light weight of automobiles, the technical characteristics of PP for automobiles are mainly represented by high rigidity (flexural modulus), high toughness (notch impact strength), and low density.
There is therefore a need in the art to develop a simple process for making high light transmission PP products with reduced weight (high rigidity, high toughness, low density).
Disclosure of Invention
Based on the above, the invention aims to overcome the defects of the prior art and provide a high-light-transmission and light-weight polypropylene composite material.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a high-light-transmission and light-weight polypropylene composite material comprises the following components in parts by weight: 50-90 parts of PP resin, 4-35 parts of a toughening agent, 4-30 parts of a filler and 0.2-4 parts of an auxiliary agent; the PP resin is PP rigid resin, and the light transmittance of a 2mm square plate is not lower than 55%; the weight part of the two-dimensional filler in the polypropylene composite material is less than 10 parts; the light transmittance is tested according to GB T2410-2008 standard.
Preferably, the PP resin is a PP resin with light transmittance of a 2mm square plate not less than 65% and flexural modulus not less than 1200 MPa.
Preferably, the toughening agent is a styrenic elastomer.
The polyolefin elastomer has a certain difference with the PP in refractive index, so that the loss of the light transmittance of the product is large; the styrene elastomer and PP have small refractive index difference, and the loss of light transmittance of the product is small. Therefore, the styrene elastomer is selected for toughening, and the high light transmittance of the material can be kept while the material is effectively toughened.
Preferably, the filler is a mixture of a filler with a length to diameter ratio higher than 20: 1. one-dimensional fillers with a diameter below 2 μm.
The talcum powder is used as a two-dimensional filler, and in the injection molding process, a large amount of talcum powder and an injection molding square plate are arranged in parallel due to the orientation effect of a shearing force field, so that the light reflection is obvious, and the light transmittance of a product is relatively high; the one-dimensional filler represented by the whisker has a weak light reflection effect, so that the loss of the light transmittance of the product is small. In addition, the one-dimensional filler with a higher major axis ratio is selected, the length-diameter ratio is higher, the rigidity increasing effect is obviously better than that of talcum powder, similar mechanical properties can be achieved by only adding half of the filler, and the material density is obviously reduced. Therefore, the one-dimensional filler with high length-diameter ratio is selected for rigidity enhancement, so that the rigidity enhancement can be realized while the high light transmittance of the material is kept, and the light weight effect can be realized.
Preferably, the auxiliary agent is at least one of an antioxidant, a light stabilizer, a lubricant, a deodorant and a toner. The auxiliary agent in the present application can be specifically selected by those skilled in the art according to actual situations.
Preferably, the high-light-transmittance and light-weight polypropylene composite material comprises the following components in parts by weight: 50-80 parts of PP resin, 5-30 parts of toughening agent, 5-25 parts of filler and 0.4-2.5 parts of auxiliary agent.
Meanwhile, the invention also provides a preparation method of the high-light-transmission and light-weight polypropylene composite material, which comprises the following steps:
adding the components into a high-speed mixer, uniformly mixing, adding the mixed raw materials into a double-screw extruder, and performing melt extrusion, granulation, drying, cooling and packaging to obtain the high-light-transmittance and light-weight polypropylene composite material; wherein the temperature of the double-screw extruder is 170 ℃, 200 ℃, 210 ℃, 205 ℃, 200 ℃ and 200 ℃ from the feeding section to the head in sequence.
Preferably, the ingredients are added to the high speed mixer and mixed for 1-3 minutes at 200-300 rpm.
In addition, the invention also provides application of the high-light-transmittance and light-weight polypropylene composite material in automobile interior and exterior parts.
Compared with the prior art, the invention has the beneficial effects that:
1) according to the invention, high light transmittance and rigidity-toughness balance of a resin system are realized by selecting high light transmittance PP and high rigidity PP matrixes;
2) according to the invention, the rigidity-increasing modification is carried out by selecting the one-dimensional filler with high length-diameter ratio and low diameter to replace the traditional talcum powder filler, the high length-diameter ratio is favorable for improving the rigidity-increasing performance of the filler, the low diameter ensures the light transmission of the material, and the technical integration of high light transmission and light weight (high rigidity, high toughness and low density) can be realized;
3) the raw materials are convenient and easy to obtain, and the production process is simple and is suitable for large-scale production.
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 following examples are merely exemplary of the present invention, and the scope of the present invention is not limited thereto. In the following examples and comparative examples, the density was measured in accordance with ISO 1183-1; the tensile property is tested according to ISO 527-2 standard, and the tensile speed is 50 mm/min; the bending strength and the bending modulus are tested according to the ISO 178 standard, and the bending speed is 2 mm/min; testing the notch impact of the cantilever beam according to the ISO180 standard; the light transmittance is tested according to GB T2410-2008 standard: method a haze meter method was selected and the light transmittance of injection molded square plaques (size 50mm x 2mm) of each sample was tested.
The main representative materials used in the examples and comparative examples are as follows:
PP-1: HJ 4045, Dahan oiliness company, homopolymerization PP, 75% of light transmittance of a 2mm square plate and 2000MPa of flexural modulus;
PP-2: EP548R, Mediterranean Shell, Co-PP, 2mm square plate with 51% light transmittance and 1200MPa flexural modulus;
and (3) PP-3: the mark MT25-S, the PP copolymer, the light transmittance of a 2mm square plate is 71 percent, and the flexural modulus is 1000 MPa;
polyolefin toughening agent: ethylene octene-copolymer, with a crystallinity of 13%;
a styrene toughening agent: styrene-ethylene-butylene-styrene block copolymer, styrene content about 13%;
talc powder: a certain product is sold in the market, the grain diameter is 3000 meshes, and the ratio of the grain diameter to the thickness is about 15: 1;
whisker: commercially available products having a diameter of about 1 μm and an aspect ratio of about 25: 1;
glass fiber: commercially available products, about 13 μm in diameter, have an aspect ratio of about 25:1 after processing.
The preparation method of the polypropylene composite material comprises the following steps:
adding the components into a high-speed mixing machine, mixing for 1-3 minutes at 200-300rpm, adding the mixed raw materials into a double-screw extruder, and performing melt extrusion, granulation, drying, cooling and packaging; the temperature of the twin-screw extruder is 170 ℃, 200 ℃, 210 ℃, 205 ℃, 200 ℃ and 200 ℃ from the feeding section to the head in sequence.
The present application sets examples 1 to 7 and comparative examples 1 to 2, and the contents of the components of examples 1 to 7 and comparative examples 1 to 2 are shown in table 1; the performance test results are shown in table 2; wherein, the processing aids in the examples 1 to 7 and the comparative examples 1 to 2 are as follows by weight: 0.2 part of main antioxidant, 0.2 part of auxiliary antioxidant, 0.2 part of light stabilizer, 0.2 part of lubricant, 1 part of deodorant and 0.2 part of toner; the selection of specific components can be routinely performed by those skilled in the art according to actual needs.
TABLE 1 ingredients, contents, etc. in examples 1 to 7 and comparative examples 1 to 2
TABLE 2 Performance data in examples 1-7 and comparative examples 1-2
As can be seen, the light transmittance of the 2mm square plates of the composite materials obtained in examples 1-7 of the application is not lower than 40%, while the light transmittance of the 2mm square plates of the materials in comparative examples 1-2 is lower than 30%, and the light transmittance of examples 1-7 is obviously better than that of the comparative examples.
Comparing example 1 with comparative example 1, it can be seen that the PP resin in comparative example 1 is a PP resin with 2mm square plate light transmittance of less than 55%, and the obtained polypropylene composite material has light transmittance, flexural modulus, tensile strength and flexural strength inferior to those of example 1. Comparing the example 1 with the comparative example 2, it can be seen that the comparative example 2 uses 10 parts of the two-dimensional filler talcum powder, and the two-dimensional filler has a shearing force field to orient the two-dimensional filler in the injection molding process, so that a large amount of talcum powder is arranged in parallel with the injection molding square plate, the reflection of light is obvious, and the loss of light transmittance of the product is large; meanwhile, the aspect ratio of the whisker used in example 1 is larger, the rigidity increasing effect is better, and the flexural modulus of example 1 is also significantly higher than that of comparative example 2. Example 1 is a significantly superior high light transmission, lightweight polypropylene material compared to comparative examples 1 and 2; therefore, the light transmittance of the 2mm square plate of the PP resin is higher than 55%, and the filling weight part of the two-dimensional filler is lower than 10 parts.
Comparing example 2 with example 1, the PP resin of example 2 has a higher light transmittance but a flexural modulus of less than 1200 MPa; in principle, the reduction in flexural modulus caused by the toughening agent should be less due to the lower amount of toughening agent used in example 2, but the flexural modulus of example 2 is still significantly lower than that of example 1 due to the too low modulus of the PP resin itself. Comparing example 3 with example 1, the elastomer selected in example 3 is a polyolefin elastomer, and the light transmittance, tensile strength, bending strength and bending modulus of the obtained composite material are all lower than those of example 1; comparing example 4 with example 1, the diameter of the filler glass fiber selected in example 4 is 13 μm, and the light transmittance, tensile strength, bending strength and bending modulus of the obtained composite material are all lower than those of example 1.
Comparing example 5 with example 1, example 5 has higher contents of the toughening agent and the filler, and the obtained composite material has lower light transmittance and higher density than example 1; example 6 is compared with example 2, and because of the higher filler content of example 6, the light transmittance of the resulting composite is lower than that of example 2, and the density is higher than that of example 2; compared with example 2, example 7 has lower content of toughening agent and filler, respectively, and the obtained material has higher light transmittance and lower density, but has smaller flexural modulus and impact strength, and is only suitable for some light-transmitting parts with relatively lower requirements on mechanical properties, such as automobile door trims and the like. Therefore, the high-light-transmission and light-weight polypropylene composite material comprehensively considers the mechanical requirements of light transmission, light weight and practical application parts of automobiles, and the preferable components in parts by weight are as follows: 50-80 parts of PP resin, 5-30 parts of toughening agent, 5-25 parts of filler and 0.4-2.5 parts of auxiliary agent.
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 (9)
1. The high-light-transmittance and light-weight polypropylene composite material is characterized by comprising the following components in parts by weight: 50-90 parts of PP resin, 4-35 parts of a toughening agent, 4-30 parts of a filler and 0.2-4 parts of an auxiliary agent; the PP resin is PP rigid resin, and the light transmittance of a 2mm square plate is not lower than 55%; the weight part of the two-dimensional filler in the polypropylene composite material is less than 10 parts; the light transmittance is tested according to GB T2410-2008 standard.
2. The high light transmission, lightweight polypropylene composite according to claim 1, wherein the PP resin is a PP resin having a light transmittance of not less than 65% and a flexural modulus of not less than 1200MPa in a 2mm square plate.
3. The high optical transmission, light weight polypropylene composite of claim 1, wherein the toughening agent is a styrenic elastomer.
4. The high optical transmission, light-weight polypropylene composite of claim 1, wherein the filler is a polypropylene having a length to diameter ratio of greater than 20: 1. one-dimensional fillers with a diameter below 2 μm.
5. The high light transmission, light weight polypropylene composite of claim 1, wherein the auxiliary agent is at least one of an antioxidant, a light stabilizer, a lubricant, a deodorant, and a toner.
6. The high light transmission, lightweight polypropylene composite material according to claim 1, comprising the following components in parts by weight: 50-80 parts of PP resin, 5-30 parts of toughening agent, 5-20 parts of filler and 0.4-2.5 parts of auxiliary agent.
7. A preparation method of the high-light-transmittance and light-weight polypropylene composite material as claimed in any one of claims 1 to 6, wherein the method comprises the following steps:
adding the components into a high-speed mixer, uniformly mixing, adding the mixed raw materials into a double-screw extruder, and performing melt extrusion, granulation, drying, cooling and packaging to obtain the high-light-transmittance and light-weight polypropylene composite material; wherein the temperature of the double-screw extruder is 170 ℃, 200 ℃, 210 ℃, 205 ℃, 200 ℃ and 200 ℃ from the feeding section to the head in sequence.
8. The method for preparing the high light transmittance and light weight polypropylene composite material as claimed in claim 7, wherein the components are added into a high mixing machine and mixed for 1-3 minutes at a rotation speed of 200-300 rpm.
9. Use of the high light transmittance, lightweight polypropylene composite material according to any one of claims 1 to 6 in automotive interior and exterior parts.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010689183.8A CN111763379B (en) | 2020-07-16 | 2020-07-16 | High-light-transmittance and light-weight polypropylene composite material and preparation method thereof |
| PCT/CN2020/136308 WO2022011953A1 (en) | 2020-07-16 | 2020-12-15 | High light transmittance and light weight polypropylene composite material and preparation method therefor |
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| CN202010689183.8A CN111763379B (en) | 2020-07-16 | 2020-07-16 | High-light-transmittance and light-weight polypropylene composite material and preparation method thereof |
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| CN111763379A true CN111763379A (en) | 2020-10-13 |
| CN111763379B CN111763379B (en) | 2022-02-01 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112778634A (en) * | 2020-12-29 | 2021-05-11 | 成都金发科技新材料有限公司 | Rigid-tough balance low-density polypropylene composite material and preparation method and application thereof |
| CN113754957A (en) * | 2021-08-17 | 2021-12-07 | 金发科技股份有限公司 | Polypropylene composition and preparation method thereof |
| WO2022011953A1 (en) * | 2020-07-16 | 2022-01-20 | 金发科技股份有限公司 | High light transmittance and light weight polypropylene composite material and preparation method therefor |
| CN113980383A (en) * | 2021-10-25 | 2022-01-28 | 成都金发科技新材料有限公司 | Polypropylene composition with high light transmission and low-temperature toughness as well as preparation method and application thereof |
| CN114479287A (en) * | 2021-12-29 | 2022-05-13 | 上海普利特复合材料股份有限公司 | Reflective polypropylene composite material suitable for automotive interior and preparation method thereof |
| CN114605741A (en) * | 2022-03-28 | 2022-06-10 | 上海金发科技发展有限公司 | Polypropylene composite material and preparation method and application thereof |
| CN115093638A (en) * | 2022-06-07 | 2022-09-23 | 广州乐高建筑科技有限公司 | Plastic terrazzo material and preparation method thereof |
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| CN115304857B (en) * | 2022-07-15 | 2023-10-17 | 宁波信泰机械有限公司 | High-transparency and light-weight composite material and preparation method and application thereof |
| CN115322474A (en) * | 2022-09-08 | 2022-11-11 | 青岛海纳新材料有限公司 | Polyolefin material for pipeline anticorrosive coating and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022011953A1 (en) * | 2020-07-16 | 2022-01-20 | 金发科技股份有限公司 | High light transmittance and light weight polypropylene composite material and preparation method therefor |
| CN112778634A (en) * | 2020-12-29 | 2021-05-11 | 成都金发科技新材料有限公司 | Rigid-tough balance low-density polypropylene composite material and preparation method and application thereof |
| CN113754957A (en) * | 2021-08-17 | 2021-12-07 | 金发科技股份有限公司 | Polypropylene composition and preparation method thereof |
| CN113980383A (en) * | 2021-10-25 | 2022-01-28 | 成都金发科技新材料有限公司 | Polypropylene composition with high light transmission and low-temperature toughness as well as preparation method and application thereof |
| CN113980383B (en) * | 2021-10-25 | 2023-07-11 | 成都金发科技新材料有限公司 | Polypropylene composition with high light transmittance and low temperature toughness as well as preparation method and application thereof |
| CN114479287A (en) * | 2021-12-29 | 2022-05-13 | 上海普利特复合材料股份有限公司 | Reflective polypropylene composite material suitable for automotive interior and preparation method thereof |
| CN114605741A (en) * | 2022-03-28 | 2022-06-10 | 上海金发科技发展有限公司 | Polypropylene composite material and preparation method and application thereof |
| CN115093638A (en) * | 2022-06-07 | 2022-09-23 | 广州乐高建筑科技有限公司 | Plastic terrazzo material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111763379B (en) | 2022-02-01 |
| WO2022011953A1 (en) | 2022-01-20 |
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