CN114957851B - Polypropylene composite material easy to absorb plastic and preparation method thereof - Google Patents
Polypropylene composite material easy to absorb plastic and preparation method thereof Download PDFInfo
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- CN114957851B CN114957851B CN202210323243.3A CN202210323243A CN114957851B CN 114957851 B CN114957851 B CN 114957851B CN 202210323243 A CN202210323243 A CN 202210323243A CN 114957851 B CN114957851 B CN 114957851B
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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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- 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
- C08L23/14—Copolymers of propene
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention relates to an easy-to-blister polypropylene composite material and a preparation method thereof. According to the invention, through compounding of the polypropylene resin, the polyethylene resin and the nylon resin, the melt strength of the polypropylene composite material is improved, the interval between the softening temperature and the melting temperature of the polypropylene resin is increased, and the temperature window of the plastic-sucking molding of the polypropylene resin is widened, so that the plastic-sucking molding performance of the polypropylene material is improved.
Description
Technical Field
The invention belongs to the field of polypropylene, and particularly relates to an easy-to-plastic polypropylene composite material and a preparation method thereof.
Background
The polypropylene material has low density, low odor, excellent chemical resistance, good heat resistance and good mechanical property, and is one of the most promising polymer materials, and is widely used in the fields of household appliances, automobiles, electronic appliances, building materials, packaging and the like. However, due to the unique spiral structure and high isotacticity of the molecular chain segment, the common polypropylene branched chain structure has a few crystallinity, the softening temperature and the melting temperature are very close, the interval is only about 10-20 ℃, the melt strength is rapidly reduced after the temperature exceeds the melting temperature, the thermoforming temperature window is about +/-5 ℃, the temperature control of processing equipment and the product structure requirements are extremely high, meanwhile, the production efficiency is greatly influenced, and the polypropylene branched chain structure is difficult to apply in the thermoforming processing fields such as blow molding, plastic suction molding, foaming and the like. Therefore, the thermal forming processing temperature window of the polypropylene composite material is widened, the melt strength of the polypropylene material is improved, and the preparation of the easily plastic-sucking polypropylene material has important significance.
The common method for improving the plastic uptake performance of the polypropylene material generally adopts long-chain branched high-melt-strength polypropylene with a special structure, and has the advantages of high synthesis difficulty, single product performance and difficulty in adapting to different application occasions; and the interpenetrating network structure formed by adopting methods such as fluoride, reactive extrusion and the like can cause high material cost and is difficult to apply on a large scale.
Disclosure of Invention
The invention aims to solve the technical problem of providing an easy-to-plastic polypropylene composite material and a preparation method thereof, wherein the melt strength of the polypropylene composite material is improved, the interval between the softening temperature and the melting temperature of the polypropylene resin is enlarged, and the temperature window of the plastic-sucking molding of the polypropylene resin is widened by compounding the polypropylene resin, the polyethylene resin and the nylon resin, so that the plastic-sucking molding performance of the polypropylene material is improved.
The invention provides an easy-to-blister polypropylene composite material which comprises the following components in parts by weight:
55-85 parts of polypropylene resin;
5-40 parts of polyethylene resin;
2-30 parts of nylon resin;
wherein, the liquid crystal display device comprises a liquid crystal display device,
the melt index MI of the polypropylene resin at 230 ℃ and 2.16kg (test standard: ISO 1133-1:2011) is 0.01-10g/10min;
the melt index MI of the polyethylene resin at 190 ℃ and 2.16kg (test standard: ISO 1133-1:2011) is 0.01-10g/10min;
the number average molecular weight of the nylon resin is 15000-36000. The softening temperature and the melting temperature of the nylon resin are 30-60 degrees higher than those of the polypropylene resin, so that the softening temperature and the melting temperature of the composite material can be greatly improved; the crystallization property of the material is reduced due to entanglement of different molecular chains after different resins are mixed, and the reduction of the crystallization degree of the material is beneficial to the reduction of the softening temperature of the material and the improvement of the melt strength of the material, and is beneficial to the improvement of the thermoforming plastic sucking property of the material.
Preferably, the polypropylene resin is at least one of a copolymerized polypropylene and a homopolypropylene; the melt index MI at 230 ℃ and 2.16kg is 0.1-4g/10min.
Preferably, the polyethylene resin is at least one of high density polyethylene, low density polyethylene and linear low density polyethylene; the melt index MI at 190 ℃ and 2.16kg is 0.1-4g/10min. More preferably, the polyethylene resin is a linear low density polyethylene.
The nylon resin is at least one of nylon 6, nylon 66, nylon 11, nylon 12, nylon 610 and nylon 612; the number average molecular weight is 15000-36000. More preferably, the nylon resin is nylon 6 and has a number average molecular weight of 16000-30000.
Preferably, the composition comprises the following components in parts by weight:
65-80 parts of polypropylene resin;
10-20 parts of polyethylene resin;
5-15 parts of nylon resin.
Preferably, the easy-to-blister polypropylene composite material can further comprise 0.5-3 parts by weight of compatilizer and 0.1-2 parts by weight of lubricant.
The invention also provides a preparation method of the easily plastic-sucking polypropylene composite material, which comprises the following steps:
adding the components into a mixer to mix uniformly to obtain a uniformly mixed material; extruding and granulating the uniformly mixed materials through a double-screw extruder to obtain the easily plastic-sucking polypropylene composite material; wherein the length-diameter ratio of the twin-screw extruder is (36-52): 1, wherein the temperature of a melting section of the double-screw extruder is 150-260 ℃.
The rotating speed of the mixer is not less than 300r/min.
The invention also provides application of the easily plastic-sucking polypropylene composite material in household appliances, automobiles or packages.
Advantageous effects
(1) The melting temperature of polypropylene is 160-170 ℃, the processing temperature is 180-260 ℃ generally, the processing temperature of polyethylene is 100-300 ℃, and the processing temperature range of nylon is 230-300 ℃, so that polyethylene and nylon resin with better compatibility are added into the polypropylene material, the melt strength of the polypropylene composite material is improved, the interval between the softening temperature and the melting temperature of the polypropylene resin is enlarged, the temperature window of the plastic-sucking molding of the polypropylene resin is widened, and the plastic-sucking molding performance of the polypropylene material is improved.
(2) After polyethylene and nylon are added, different molecular chains are mutually entangled, so that ordered and regular arrangement of the molecular chains is prevented, the crystallinity of the polypropylene material is greatly reduced, the softening temperature of the polypropylene material is reduced, the melt strength of the polypropylene composite material is improved, and the plastic sucking performance of the polypropylene material is improved.
(3) The material of the invention has low cost, good mechanical property and easy processing, and can be widely used for thermoforming processing such as plastic suction forming, blow molding and the like in the fields of household appliances, automobiles, new energy, packaging and the like.
Detailed Description
The invention will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. Further, it is understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the present invention, and such equivalents are intended to fall within the scope of the claims appended hereto.
The reagents, methods and apparatus employed in the present invention, unless otherwise specified, are all conventional in the art.
The following examples and comparative examples were prepared from the following raw materials:
homo polypropylene 1: the brand is PP B1101; medium petrifaction; a melt flow rate of 2.16kg at 230℃of 0.5g/10min;
copolymer polypropylene 1: the brand is PP K8003; medium petrifaction; 2.16kg melt flow rate at 230℃was 2.5g/10min;
homo-polypropylene 2: the brand is PP PPH-T03; medium petrifaction; 2.16kg melt flow rate at 230℃was 3.5g/10min;
copolymer polypropylene 2: the brand is PP M09; medium petrifaction; a melt flow rate of 2.16kg at 230℃of 9g/10min;
homo-polypropylene 3: the brand is PP V30G; medium petrifaction; 2.16kg melt flow rate at 230℃was 16g/10min;
polyethylene 1: linear low density polyethylene, brand MLPE 3518CB; exxon (R); 2.16kg melt flow rate at 190℃was 2.5g/10min;
polyethylene 2: high density polyethylene, HDPE 5502; medium petrifaction; a melt flow rate of 2.16kg at 190℃of 0.5g/10min;
polyethylene 3: high density polyethylene, HDPE DMDA8008; medium petrifaction; 2.16kg melt flow rate at 190℃was 8g/10min;
polyethylene 4: linear low density polyethylene, LLDPE M2320; exxon (R); 2.16kg melt flow rate at 190℃was 20g/10min;
PA6 resin 1: LX245, luraci chemical industry, number average molecular weight 16000.
PA11 resin 2:1452MAC, acomax, number average molecular weight 18000.
PA6 resin 3: BL3280, baling petrochemical, number average molecular weight 24000.
PA6 resin 4: PA6 1030, mitsubishi japan, has a number average molecular weight of 40000.
The composite materials of the embodiments and the comparative examples of the invention are prepared by the following processes:
adding the components into a mixer to mix uniformly to obtain a uniformly mixed material; extruding and granulating the uniformly mixed materials through a double-screw extruder to obtain the easily plastic-sucking polypropylene composite material; wherein the length-diameter ratio of the twin-screw extruder is (36-52): 1, wherein the temperature of a melting section of the double-screw extruder is 150-230 ℃. The rotating speed of the mixer is not less than 300r/min.
Examples and comparative examples were subjected to the following test methods or test criteria:
the Vicat softening point of the material is tested by using GB/T1633-2000 standard, and the melting temperature is tested by using GB/T19466.3-2004 standard.
The melt strength of the material is tested by using a Gottfert 'Rheotens' melt strength tester, and at the set temperature of 180 ℃, polymer melt is extruded downwards from an extruder die provided with a capillary, and is pulled by two compression rollers with opposite movement directions, which are arranged on a balance beam, and the force applied to the melt when the melt is stretched is a function of the speed and time of the compression rollers. The press roll is uniformly accelerated until the melt breaks, at which point the force applied to the melt at break is defined as the melt strength.
Table 1 the contents of the components (in parts by weight) of the examples
Table 2 comparative example component content (in parts by weight)
Table 3 results of analysis of various properties of examples
Table 4 results of analysis of respective properties of comparative examples
By comparing the materials of examples 1-4 with comparative example 1, it was found that the melt strength of the composite material was greatly reduced after the addition of the polypropylene material having a higher melt index;
by comparing examples 2, 10-11 with comparative example 2, it can be found that the melt strength of the composite material is greatly reduced by adding PE material with higher melt index, and the processing temperature interval is narrowed;
by comparing examples 3, 12 to 13 with comparative example 3, it was found that after PA having too high a molecular weight was added, both the melt strength and the processing temperature interval of the material were hardly improved because it was difficult to mix and compatible with polypropylene and polyethylene during processing due to too high a molecular weight;
comparative examples 4 and 5 demonstrate that the melt strength of the polypropylene composite material can be obviously improved by adding polyethylene and nylon at the same time, thereby improving the plastic uptake molding performance of the polypropylene material;
comparative examples 6-7 demonstrate that adding an excess of polyethylene or nylon does not effectively increase the melt strength of the material and extend the processing temperature window of the material, thereby modifying the thermoforming blister properties of the material.
Claims (7)
1. The utility model provides an easy plastic uptake polypropylene composite which characterized in that: the coating comprises the following components in parts by weight:
55-85 parts of polypropylene resin;
5-40 parts of polyethylene resin;
2-30 parts of nylon resin;
wherein, the liquid crystal display device comprises a liquid crystal display device,
the melt index MI of the polypropylene resin at 230 ℃ and 2.16kg is 0.5-10g/10min;
the melt index MI of the polyethylene resin at 190 ℃ and 2.16kg is 0.5-10g/10min;
the number average molecular weight of the nylon resin is 15000-24000.
2. The composite material of claim 1, wherein: the polypropylene resin is at least one of copolymerized polypropylene and homopolymerized polypropylene; the melt index MI at 230 ℃ and 2.16kg is 0.5-4g/10min.
3. The composite material of claim 1, wherein: the polyethylene resin is at least one of high-density polyethylene, low-density polyethylene and linear low-density polyethylene; the melt index MI at 190 ℃ and 2.16kg is 0.5-4g/10min.
4. The composite material of claim 1, wherein: the nylon resin is at least one of nylon 6, nylon 66, nylon 11, nylon 12, nylon 610 and nylon 612.
5. The composite material of claim 1, wherein: the coating comprises the following components in parts by weight:
65-80 parts of polypropylene resin;
10-20 parts of polyethylene resin;
5-15 parts of nylon resin.
6. A method for preparing the easily plastic-sucking polypropylene composite material as claimed in claim 1, comprising the following steps:
adding the components into a mixer to mix uniformly to obtain a uniformly mixed material; extruding and granulating the uniformly mixed materials through a double-screw extruder to obtain the easily plastic-sucking polypropylene composite material; wherein the length-diameter ratio of the twin-screw extruder is (36-52): 1, wherein the temperature of a melting section of the double-screw extruder is 150-260 ℃.
7. Use of the easily plastic-absorbable polypropylene composite material of claim 1 in household appliances, automobiles or packaging.
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| CN202210323243.3A CN114957851B (en) | 2022-03-29 | 2022-03-29 | Polypropylene composite material easy to absorb plastic and preparation method thereof |
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| CN114957851B true CN114957851B (en) | 2023-06-13 |
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| CN115612207B (en) * | 2022-10-17 | 2023-11-03 | 杭州恒峰塑料制品有限公司 | Preparation process of thermoplastic resin blow-molded body |
| CN116239838A (en) * | 2022-12-30 | 2023-06-09 | 上海金发科技发展有限公司 | Polypropylene composition and preparation method and application thereof |
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| US6605656B2 (en) * | 2000-11-29 | 2003-08-12 | Visteon Global Technologies, Inc. | Surface properties in thermoplastic olefin alloys |
| CN101768309A (en) * | 2009-12-31 | 2010-07-07 | 华南理工大学 | Polypropylene composite material with high strength and toughness and preparation method thereof |
| CN102816387A (en) * | 2012-09-14 | 2012-12-12 | 苏州谷力生物科技有限公司 | Toughened nylon and preparation method thereof |
| CN107857989A (en) * | 2017-10-27 | 2018-03-30 | 宁波能之光新材料科技股份有限公司 | A kind of polyethylene/polypropylene alloy for toughening nylon and preparation method thereof |
| CN109438602B (en) * | 2018-09-07 | 2021-12-03 | 中国石油化工股份有限公司 | High-melt-strength polypropylene resin special for plastic suction molding and preparation method thereof |
| CN110527187A (en) * | 2019-08-15 | 2019-12-03 | 合肥市和裕达塑业有限公司 | Low odor scratch-resistant physical blowing squeezes out PP composite material and preparation method |
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