CN101544822A - Preparation method for maleic anhydride grafting modified carbon fiber/polyamide/polypropylene composite material - Google Patents
Preparation method for maleic anhydride grafting modified carbon fiber/polyamide/polypropylene composite material Download PDFInfo
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- CN101544822A CN101544822A CN200910050288A CN200910050288A CN101544822A CN 101544822 A CN101544822 A CN 101544822A CN 200910050288 A CN200910050288 A CN 200910050288A CN 200910050288 A CN200910050288 A CN 200910050288A CN 101544822 A CN101544822 A CN 101544822A
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Abstract
The invention relates to a preparation method for maleic anhydride grafting modified carbon fiber/polyamide/polypropylene composite material. The preparation method is carried out according to the following steps: firstly immersing polypropylene in a maleic anhydride solution, and carrying out the vacuum drying on polyamide 6 and maleic anhydride grafting polypropylene respectively at 90 DEG C and 50 DEG C for 10 hours; then mixing the polyamide 6 and the maleic anhydride grafting polypropylene with carbon fiber, carrying out melt-mixing on the mixture at 245 DEG C, and carrying out extrusion and granulation; and then drying the obtained granules of the blend at 85 DEG C for 12 hours, then carrying out injection moulding on the dried granules with the injection temperature of 200 to 250 DEG C, the injection pressure of 50 to 90 MPa, the injection time of 2 to 10 seconds and the injection rate of 50 to 80 g/s, and preparing a standard sample for a mechanical property test. The carbon fiber is 10 to 20 weight percent of the mixed powdery material. The preparation method effectively improves the strength of the polypropylene, and has a simple process and low cost.
Description
Technical field
The present invention relates to a kind of preparation method of modified by maleic acid anhydride graft carbon fiber/polyamide amine/polypropylene composite material, this material is used to make bumper.
Background technology
Along with scientific-technical progress, continually developing of novel materials such as the application of matrix material, fibre reinforced thermoplasticity plastics, automobile appearance and component plasticizing are irreversible development trends, it plays the part of more and more important role in improving automobile usefulness, the market requirement attractive in appearance and light-weighted, so plastics constantly enlarge in the application of automotive field.Because the quality of automobile component directly influences the performance of car load,, be the task of top priority of Application and Development so improve the quality of material property and component.Along with automotive plastic by the increase of inside gadget to the development of structural part, functional part and automobile load, unitary plastic can't satisfy the service requirements of parts such as heavily stressed, high temperature spare and outside plate, and development mechanics intensity height, good combination property, thermotolerance is good with weather resistance, the life-span long and the functional type engineering plastics of good reliability have become the matter of great urgency.
Bumper is the important applied field of TPE (thermoplastic elastomer), wherein again based on TPO (TPO).Collision bumper adopts MODIFIED PP production mostly, because the performance of MODIFIED PP is preferable, its application and development is accelerated.The plastics collision bumper has accounted for more than 90% of world car plastics materials at present, with the MODIFIED PP be that the collision bumper of raw material production has that easy processing, cost are low, light weight and advantage such as recyclable, the PP plastic material is by after filling-modified, compare with the plastic materials such as PVC, ABS that original automobile inside trim uses, have excellent thermotolerance and rigidity, be convenient to forming process, be particularly conducive to recycling.
Polypropylene (PP) belongs to nonpolar crystalline high polymer, owing to have good comprehensive performances, cheap, of many uses becoming developed thermoplasticity resins for universal use rapidly.But when its tensile strength when the industrial part and shock strength can not meet the demands usually, and easily creep, poor dimensional stability have also limited its application.The PP alloying is to improve the effective way of PP performance.Polyamide 6 (PA6) has characteristics such as intensity height, good springiness, wear-resistant, resistance to chemical attack, has excellent friction and wear behavior under extreme environments such as high temperature, high-low pressure and high speed.With PP and PA6 blend, can effectively improve the performance of PP.PP and PA6 system are incompatible co-mixing systems, and the consistency that adopts grafts to improve PP and PA6 has become the focus of research.But polymeric amide specific activity surface-area is little, surface energy is low, and when polypropene blended, often the poor adhesion because of itself and acrylic resin interface influences its use properties, thereby improves biphase blend compatibility and just seem very important.At present, main application phathalic anhydride-terminated PSU (PSU-PhAH), melt radical grafting with glycidylmethacrylate (GMA), maleated ethylene-propylene-diene copolymer (EPDM-graft-MAH) wait and improve polymeric amide and polyacrylic interface binding power, to improve polymeric amide and polyacrylic over-all properties, these methods have been improved polymeric amide and polyacrylic interfacial combined function to a certain extent, but do not reach the ideal compatible result.Therefore, be necessary to adopt effective method of modifying that it is carried out modification and handle, to improve polymeric amide and polyacrylic compatibility to greatest extent.
Carbon fiber enhancement resin base composite material is widely used on spacecraft structure owing to have a series of excellent specific properties such as density is little, specific tenacity is high, specific modulus is high, thermal expansivity is little.Wherein carbon fiber is to strengthen body, is main load bearing structure, and resin matrix plays a part to connect fiber and transmitted load, can transmit and bear shear-stress, bears stretching and compressive load perpendicular to fiber, and the protection fiber is injury-free and corrosion.Studies show that carbon fiber is before without surface treatment, its specific activity surface-area is little, and edge active atoms of carbon number is also few, and surface energy is low, and contact angle is big, and the surface presents lyophobicity, causes itself and resin matrix imperfect bonding.The bonding degree of not surface treated carbon fiber and body material is difficult to reach due level, can not give full play to matrix material potential mechanical property.
Summary of the invention
The present invention discloses a kind of preparation method of modified by maleic acid anhydride graft carbon fiber/polyamide amine/polypropylene composite material, this material is used to make bumper, its purpose is to overcome the problem of poor compatibility between polypropylene and the polymeric amide, the present invention adopts the method for maleic anhydride graft that polypropylene is carried out surface graft modification and handles, the interface that can improve polymeric amide/polypropylene (PA6/PP) matrix material is in conjunction with compatible energy, prepare matrix material, go for the bumper material with more excellent mechanical property.
A kind of preparation method of modified by maleic acid anhydride graft carbon fiber/polyamide amine/polypropylene composite material is characterized in that carrying out according to following steps:
A) adopt maleic anhydride solution soaking polypropylene, polyamide 6 and maleic anhydride inoculated polypropylene respectively at 90 ℃ and 50 ℃ of following vacuum-drying 10h, are mixed with carbon fiber then, and in 245 ℃ of following melt blendings, extruding pelletization;
B) with A) injection molding behind dry 12h under 85 ℃ of middle gained blend pellet, injection temperature is 200-250 ℃, and injection pressure is 50-90MPa, and be 2-10s inject time, injection rate 50-80g/s, the preparation standard sample is used for Mechanics Performance Testing.
The weight percent of described carbon fiber is 10～20% of a mixed powder.
The weight percentages of components of described maleic anhydride solution is: maleic anhydride: ethanol 10-20%: ethylenediamine tetraacetic acid (EDTA) 70-85%: 5-10%.
Described polypropylene is a thermoplastic polypropylene.
Described modified by maleic acid anhydride graft carbon fiber/polyamide amine/polypropylene composite material is used to make bumper.
The present invention has improved the interface of polymeric amide/polypropylene (PA6/PP) matrix material in conjunction with compatible energy, has effectively improved polyacrylic intensity, and technology is simple, and cost is low.
Embodiment
Below by specific embodiment technical scheme of the present invention is further described, but present embodiment is not limited to the present invention, every employing the inventive method and similar variation thereof all should be listed protection scope of the present invention in.
Embodiment 1:
The weight percentages of components of matrix material is: carbon fiber: 89%, and polypropylene: 10%, polymeric amide: 1%.
Maleic anhydride modified dose of each weight percentages of components is as follows: maleic anhydride: ethanol 10%: ethylenediamine tetraacetic acid (EDTA) 85%: 5%.
The Composite Preparation process is as follows:
Adopt the method for maleic anhydride graft that polypropylene is carried out the surface graft modification processing, can with the interface of improving polymeric amide/polypropylene (PA6/PP) matrix material in conjunction with compatibility, with PA6 and maleic anhydride inoculated polypropylene respectively at 90 ℃ and 50 ℃ of following vacuum-drying 10h, mix with a certain amount of carbon fiber then, and in 245 ℃ of following melt blendings, extruding pelletization; With the injection molding behind dry 12h under 85 ℃ of gained blend pellet, injection temperature is 200 ℃, and injection pressure is 50MPa, and be 2s inject time, injection rate 50g/s, and the preparation standard sample is used for Mechanics Performance Testing.The matrix material for preparing is carried out mechanical property test, and its tensile strength is 145Mpa.
Embodiment 2:
The weight percentages of components of matrix material is: carbon fiber: 79%, and polypropylene: 11%, polymeric amide: 10%.
Maleic anhydride modified dose of each weight percentages of components is as follows: maleic anhydride: ethanol 20%: ethylenediamine tetraacetic acid (EDTA) 70%: 5%.
The Composite Preparation process is as follows:
Adopt the method for maleic anhydride graft that polypropylene is carried out the surface graft modification processing, can with the interface of improving polymeric amide/polypropylene (PA6/PP) matrix material in conjunction with compatibility, with PA6 and maleic anhydride inoculated polypropylene respectively at 90 ℃ and 50 ℃ of following vacuum-drying 10h, mix with a certain amount of carbon fiber then, and in 245 ℃ of following melt blendings, extruding pelletization; With the injection molding behind dry 12h under 85 ℃ of gained blend pellet, injection temperature is 230 ℃, and injection pressure is 70MPa, and be 5s inject time, injection rate 60g/s, and the preparation standard sample is used for Mechanics Performance Testing.
The matrix material for preparing is carried out mechanical property test, and its tensile strength is 151Mpa.
Embodiment 3:
The weight percentages of components of matrix material is: carbon fiber: 80%, and polypropylene: 15%, polymeric amide: 5%.
Maleic anhydride modified dose of each weight percentages of components is as follows: maleic anhydride: ethanol 19%: ethylenediamine tetraacetic acid (EDTA) 80%: 1%.
The Composite Preparation process is as follows:
Adopt the method for maleic anhydride graft that polypropylene is carried out the surface graft modification processing, can with the interface of improving polymeric amide/polypropylene (PA6/PP) matrix material in conjunction with compatibility, with PA6 and maleic anhydride inoculated polypropylene respectively at 90 ℃ and 50 ℃ of following vacuum-drying 10h, mix with a certain amount of carbon fiber then, and in 245 ℃ of following melt blendings, extruding pelletization; With the injection molding behind dry 12h under 85 ℃ of gained blend pellet, injection temperature is 250 ℃, and injection pressure is 90MPa, and be 10s inject time, and injection rate 80g/s, preparation standard sample are used for Mechanics Performance Testing, and its tensile property is 162Mpa.
Routine in contrast, under identical matrix material component and composite material preparation process, grafting modified carbon fiber/polyamide amine/polypropylene composite material tensile strength is not 112MPa, and as can be seen, modified by maleic acid anhydride graft is handled for the matrix material tensile property and improved obviously.
Claims (4)
1. the preparation method of a modified by maleic acid anhydride graft carbon fiber/polyamide amine/polypropylene composite material is characterized in that carrying out according to following steps:
A) adopt maleic anhydride solution soaking polypropylene, polyamide 6 and maleic anhydride inoculated polypropylene respectively at 90 ℃ and 50 ℃ of following vacuum-drying 10h, are mixed with carbon fiber then, and in 245 ℃ of following melt blendings, extruding pelletization;
B) with A) injection molding behind dry 12h under 85 ℃ of middle gained blend pellet, injection temperature is 200-250 ℃, and injection pressure is 50-90MPa, and be 2-10s inject time, injection rate 50-80g/s, the preparation standard sample is used for Mechanics Performance Testing.
2. the preparation method of a kind of modified by maleic acid anhydride graft carbon fiber/polyamide amine/polypropylene composite material according to claim 1 is characterized in that: the weight percent of described carbon fiber is 10～20% of a mixed powder.
3. the preparation method of a kind of modified by maleic acid anhydride graft carbon fiber/polyamide amine/polypropylene composite material according to claim 1 is characterized in that: the weight percentages of components of described maleic anhydride solution is: maleic anhydride: ethanol 10-20%: ethylenediamine tetraacetic acid (EDTA) 70-85%: 5-10%.
4. the preparation method of a kind of modified by maleic acid anhydride graft carbon fiber/polyamide amine/polypropylene composite material according to claim 1 is characterized in that: described polypropylene is a thermoplastic polypropylene.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103572960A (en) * | 2012-07-21 | 2014-02-12 | 苏州宏久航空防热材料科技有限公司 | Orthogonal laminated fiber enhanced composite template for buildings and preparation method thereof |
| CN104647632A (en) * | 2015-02-12 | 2015-05-27 | 柳州聚龙科技有限公司 | Manufacture method of car bumper |
| CN105693953A (en) * | 2016-04-18 | 2016-06-22 | 河南工业大学 | Preparation method of carbon fiber reinforced thermoplastic composite unidirectional tape |
| CN106497040A (en) * | 2016-11-04 | 2017-03-15 | 马鞍山市华能电力线路器材有限责任公司 | A kind of carbon fiber reinforced corrosion resistant type PA66/PP electric armour clamp materials and preparation method thereof |
-
2009
- 2009-04-30 CN CN200910050288A patent/CN101544822A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103572960A (en) * | 2012-07-21 | 2014-02-12 | 苏州宏久航空防热材料科技有限公司 | Orthogonal laminated fiber enhanced composite template for buildings and preparation method thereof |
| CN103572960B (en) * | 2012-07-21 | 2016-04-06 | 苏州宏久航空防热材料科技有限公司 | The preparation method of the fibre-reinforced composite formwork for construction of a kind of orthogonal laminated |
| CN104647632A (en) * | 2015-02-12 | 2015-05-27 | 柳州聚龙科技有限公司 | Manufacture method of car bumper |
| CN105693953A (en) * | 2016-04-18 | 2016-06-22 | 河南工业大学 | Preparation method of carbon fiber reinforced thermoplastic composite unidirectional tape |
| CN105693953B (en) * | 2016-04-18 | 2018-10-23 | 河南工业大学 | The preparation method of fibre reinforced thermoplastic composite one-way tape |
| CN106497040A (en) * | 2016-11-04 | 2017-03-15 | 马鞍山市华能电力线路器材有限责任公司 | A kind of carbon fiber reinforced corrosion resistant type PA66/PP electric armour clamp materials and preparation method thereof |
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Open date: 20090930 |