CN107345027A - A kind of superelevation shock strength PP composite material and preparation method thereof - Google Patents
A kind of superelevation shock strength PP composite material and preparation method thereof Download PDFInfo
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- CN107345027A CN107345027A CN201610313081.XA CN201610313081A CN107345027A CN 107345027 A CN107345027 A CN 107345027A CN 201610313081 A CN201610313081 A CN 201610313081A CN 107345027 A CN107345027 A CN 107345027A
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- 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
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Abstract
The present invention relates to polymer modification and processing, it is desirable to provide a kind of superelevation shock strength PP composite material and preparation method thereof.This kind of superelevation shock strength PP composite material is made up of raw material polypropylene, elastic body toughening agent, stabilizer；Material after blending terminates, is cut into particle by this kind of preparation method will to be blended in raw material mixing Haake torque rheometers, that is, required superelevation shock strength PP composite material is made.The present invention uses hyperbranched polyethylene compared with traditional toughening modifying polypropylene, to have more excellent low-temperature flexibility as elastic body toughening agent.
Description
Technical field
The present invention is on polymer modification and manufacture field, more particularly to a kind of superelevation shock strength polypropylene composite materials material
Material and preparation method thereof.
Background technology
At present, the high speed development of auto industry provides unprecedented opportunities for polypropylene material.Some important vapour
In-car gadget, such as bumper, instrument board, door-plate, console, in addition to requiring them and there is enough intensity, also require it
There is enough shock resistances.So it could ensure that they will not produce obvious rupture in car collision accident
Or the safety of sharp fragments, as far as possible protection driver and conductor.For example, bumper can play when low speed collision accident occurs for automobile
Cushioning effect, car body before and after protection；Certain protection pedestrian can be played a part of when accident occurs with pedestrian.Door-plate is in car
Occur side impact when carrying most directly impact, and seamless gasbag instrument board then need when vehicle collides ensure air bag it is suitable
Profit and promptly open.Once generation accident, bumper, door-plate, instrument board etc. can not produce any hard that may be hurted sb.'s feelings
Fragment.Especially under limit cryogenic conditions, auto industry proposes high requirement to polypropylene material.
Polyacrylic crystallinity is high, compound with regular structure, has excellent mechanical property, and rigidity is high, but cold resistance is poor, low temperature punching
Hit intensity is low.The co-monomers such as a small amount of ethene or butylene can be generally introduced in polypropylene by the method for copolymerization, or are passed through
The method for adding elastomer carries out toughness reinforcing to polypropylene, so as to improve polyacrylic shock strength, especially low-temperature impact performance.
For example, the SP179 of Sinopec Qilu Petrochemical Company production is the COPP trade mark, because it has high shock resistance
It is referred to as superelevation impact polypropylene.The similar impact copolymer polypropylene trade mark also has AW564, AW191 of PTC S. A. of Singapore,
AP3AW, AP3N of EXXON companies, the J640 of South Korea's Hyosung, the SB9108 of Kpic, the K7708 of Yanshan Petrochemical, Maoming stone
(modern plastics processed and applied, 2006,18 (4) such as EPC30R, EPC30R-H of change：11-14).Iron of fine quality etc. is opened in Chinese invention patent
(application number：201310740894.3) ethene-butylene copolymer is used to make as elastic body toughening agent using superfine talcum powder in
For inorganic filler, a kind of high-modulus, super high impact resistance polypropylene composite material are prepared for.
But up to the present, the impact strength at low temperature of super High-impact Polypropylene is high not enough.Such as SP179,
Notch impact strength of the COPP such as AW564, AW191 trade mark at -20 DEG C is no more than 12.5kJ/m2.With ethene-butylene
Notch impact strength of the super high impact resistance polypropylene composite material that copolymer is prepared as elastic body toughening agent at -30 DEG C is not yet
More than 10.9kJ/m2。
The content of the invention
It is a primary object of the present invention to overcome deficiency of the prior art, there is provided a kind of superelevation impact polypropylene composite wood
Material and preparation method thereof.In order to solve the above technical problems, the solution of the present invention is：
A kind of superelevation shock strength PP composite material is provided, is made up of the raw material of following weight percentage：
Polypropylene：69.5~89.5%；
Elastic body toughening agent：10~30%；
Stabilizer：0.1~2%；
The elastic body toughening agent is hyperbranched polyethylene.
In the present invention, the polypropylene uses homo-polypropylene or propylene of the melt index between 0.3~60g/10min
Copolymer；Wherein, it is ethene that the comonomer of propylene copolymer is common, and its content is in the range of 0~10mol%.
In the present invention, the elastic body toughening agent uses the degree of branching as 84~125 side chain/1000 carbon, vitrifyings
Transition temperature is -67 DEG C~-61 DEG C, weight average molecular weight is 9.2 ten thousand~420,000,125 DEG C of Mooney viscosity ML (1+4) be 2.12~
86.63 hyperbranched polyethylene.
In the present invention, in 84~125 side chain/1000 carbon of the degree of branching of the hyperbranched polyethylene, methyl content
For 48.7~64.5mol%, ethyl content is 7.4~20.3mol%, and propyl group content is 1.8~6.7mol%, and butyl content is
2.8~5.6mol%, amyl group content are 2.1~3.7mol%, and the branching content of carbon number >=6 is 12.1~24.3mol%.
In the present invention, the stabilizer is the mixture of primary antioxidant and auxiliary antioxidant, and primary antioxidant is hindered phenol
Or sulphur ester antioxidant, auxiliary antioxidant are phosphorite kind antioxidant.
In the present invention, the stabilizer uses antioxidant B215, i.e. primary antioxidant 1010 and auxiliary antioxidant 168 is massaged
That ratio 1:The mixture of 1 mixing.
The method for preparing the superelevation shock strength PP composite material is provided, specifically includes following step：
(1) polypropylene, hyperbranched polyethylene and stabilizer are weighed by following percentage by weights：
Polypropylene：69.5~89.5%；
Elastic body toughening agent：10~30%；
Stabilizer：0.1~2%；
(2) raw material for weighing step (1) adds mixed raw material in super mixer after dry-mixed 3~15 minutes
Enter in Haake torque rheometers, the temperature of rheometer is set as 170~190 DEG C, and rotating speed is 30~100 revs/min, during blending
Between be 5~10 minutes；After blending terminates, material is cut into (0.5 centimeter square) particle by (while hot), that is, required superelevation is made and resists
Rush strength polypropylene composite.
The principle of the present invention：Carried in Chinese invention patent ZL 2,012 1 0276244.3 and ZL 2,012 1 0276331.9
Several new (alpha-diimine) Raney nickels have been supplied, in follow-up research, it has been found that these catalyst not only have compared with
Good heat endurance, and the ability of catalyst chain walking has also obtained retaining well；Under suitable conditions, urged with them
Change ethylene homo, can prepare glass transition temperature be -67 DEG C~-61 DEG C, weight average molecular weight be 9.2 ten thousand~420,000 surpass
Branched polyethylene, by the use of this hyperbranched polyethylene as elastic body toughening agent, available for preparation superelevation impact polypropylene composite wood
Material.
Compared with prior art, the beneficial effects of the invention are as follows：
The present invention uses hyperbranched polyethylene compared with traditional toughening modifying polypropylene, to have as elastic body toughening agent
More excellent low-temperature flexibility.
Embodiment
The present invention is described in further detail with reference to embodiment：
The present invention is more fully understood in the professional and technical personnel that the following examples can make this professional, but not with any side
The formula limitation present invention.
Embodiment 1
89.5% polypropylene (melt index 15g/10min, without comonomer) is weighed by weight percentage, 10% is surpassed
(degree of branching is 99 side chain/1000 carbon to branched polyethylene, glass transition temperature is -65 DEG C, weight average molecular weight 15.1
Ten thousandth, 125 DEG C of Mooney viscosity ML (1+4) be in 4.63,99 side chain/1000 carbon methyl content be 58.3mol%, ethyl content
For 12.4mol%, propyl group content be 5.8mol%, butyl content 3.8mol%, amyl group content are 3.1mol%, carbon number >=6
Branching content is 16.6mol%), 0.5% stabilizer B215, dry-mixed 5 minutes in super mixer, add Haake torques
In rheometer, the temperature of rheometer is set as 175 DEG C, and rotating speed is 60 revs/min, and the blending time is 8 minutes.After blending terminates,
Material is cut into fine particle while hot.
Material particles are put into the mould for preparing test bars, be placed in 180 DEG C of vulcanizing press, preheated 5 minutes
Material is set fully to absorb heat melt-flow, vulcanizer temperature is first down to 170 DEG C, then rises back 180 DEG C again, illustrates that material fully melts
Melt, be now forced into 3MPa or so, pressurize 30 seconds, deflate, 5 times back and forth, repressurization to 20MPa, pressurize 5 minutes.Pressurize terminates
Afterwards, batten is quickly transferred in compression molding instrument at room temperature, is cold-pressed 5 minutes under 20MPa, it is stand-by to then take out sample.
Batten and shock resistance batten are bent according to GB/T9341 and GB/T1843 sample preparations.Izodtest presses GB/T1843-1996
Test method is carried out, with 2.75J jump bit.Bend test is carried out by GB/T9341-2000 test methods.Melt index according to
GB/T3682-2000 is tested.Vicat softening point is tested according to GB/T1634-2001.
Test result shows that the bending modulus of the PP composite material prepared by the above process is 1205.0MPa, bending
Intensity is 36.6MPa, and notch impact strength (25 DEG C) is 6.70kJ/m2, melt index 16.3g/10min, Vicat softening point
126.1 DEG C, 164.5 DEG C of fusing point, crystallinity 50.1%.
Embodiment 2
84.5% polypropylene (melt index 17g/10min, without comonomer) is weighed by weight percentage, 15% is surpassed
(degree of branching is 99 side chain/1000 carbon to branched polyethylene, transition temperature is -65 DEG C, weight average molecular weight is 15.1 ten thousand, Mooney
125 DEG C of viscosity ML (1+4) be in 4.63,99 side chain/1000 carbon methyl content be 58.3mol%, ethyl content be
12.4mol%, propyl group content are 5.8mol%, butyl content 3.8mol%, amyl group content are 3.1mol%, carbon number >=6
Chain content is 16.6mol%), 0.5% stabilizer B215.The same embodiment of preparation method and method of testing of PP composite material
1。
Test result shows that the bending modulus of the PP composite material prepared by the above process is 1115.0MPa, bending
Intensity is 33.0MPa, and notch impact strength (25 DEG C) is 8.37kJ/m2, melt index 15.9g/10min, Vicat softening point
124.6 DEG C, 164.3 DEG C of fusing point, crystallinity 44.6%.
Embodiment 3
79.5% polypropylene (melt index 17g/10min, without comonomer) is weighed by weight percentage, 20% is surpassed
(degree of branching is 99 side chain/1000 carbon to branched polyethylene, transition temperature is -65 DEG C, weight average molecular weight is 15.1 ten thousand, Mooney
125 DEG C of viscosity ML (1+4) be in 4.63,99 side chain/1000 carbon methyl content be 58.3mol%, ethyl content be
12.4mol%, propyl group content are 5.8mol%, butyl content 3.8mol%, amyl group content are 3.1mol%, carbon number >=6
Chain content is 16.6mol%), 0.5% stabilizer B215.The same embodiment of preparation method and method of testing of PP composite material
1。
Test result shows that the bending modulus of the PP composite material prepared by the above process is 934.8MPa, bending
Intensity is 27.0MPa, and notch impact strength (25 DEG C) is 10.22kJ/m2, melt index 15.6g/10min, Vicat softening point
120.3 DEG C, 164.4 DEG C of fusing point, crystallinity 42.4%.
Embodiment 4
74.5% polypropylene (melt index 17g/10min, without comonomer) is weighed by weight percentage, 25% is surpassed
(degree of branching is 99 side chain/1000 carbon to branched polyethylene, transition temperature is -65 DEG C, weight average molecular weight is 15.1 ten thousand, Mooney
125 DEG C of viscosity ML (1+4) be in 4.63,99 side chain/1000 carbon methyl content be 58.3mol%, ethyl content be
12.4mol%, propyl group content are 5.8mol%, butyl content 3.8mol%, amyl group content are 3.1mol%, carbon number >=6
Chain content is 16.6mol%), 0.5% stabilizer B215.The same embodiment of preparation method and method of testing of PP composite material
1。
Test result shows that the bending modulus of the PP composite material prepared by the above process is 876.2MPa, bending
Intensity is 24.8MPa, and notch impact strength (25 DEG C) is 9.48kJ/m2, melt index 15.5g/10min, Vicat softening point
118.4 DEG C, 164.2 DEG C of fusing point, crystallinity 42.0%.
Embodiment 5
69.5% polypropylene (melt index 17g/10min, without comonomer) is weighed by weight percentage, 30% is surpassed
(degree of branching is 99 side chain/1000 carbon to branched polyethylene, transition temperature is -65 DEG C, weight average molecular weight is 15.1 ten thousand, Mooney
125 DEG C of viscosity ML (1+4) be in 4.63,99 side chain/1000 carbon methyl content be 58.3mol%, ethyl content be
12.4mol%, propyl group content are 5.8mol%, butyl content 3.8mol%, amyl group content are 3.1mol%, carbon number >=6
Chain content is 16.6mol%), 0.5% stabilizer B215.The same embodiment of preparation method and method of testing of PP composite material
1。
Test result shows that the bending modulus of the PP composite material prepared by the above process is 658.7MPa, bending
Intensity is 17.7MPa, and notch impact strength (25 DEG C) is 5.33kJ/m2, melt index 14.5g/10min, Vicat softening point
115.0 DEG C, 164.4 DEG C of fusing point, crystallinity 30.4%.
Embodiment 6
89.5% polypropylene (melt index 0.3g/10min, the content of comonomer ethylene are weighed by weight percentage
For 5mol%), (degree of branching is 99 side chain/1000 carbon to 10% hyperbranched polyethylene, transition temperature is -65 DEG C, Weight-average molecular
Measure for 125 DEG C of 15.1 ten thousand, Mooney viscosity ML (1+4) be in 4.63,99 side chain/1000 carbon methyl content be 58.3mol%,
Ethyl content is 12.4mol%, propyl group content is 5.8mol%, butyl content 3.8mol%, amyl group content be 3.1mol%,
The branching content of carbon number >=6 is 16.6mol%), 0.5% stabilizer B215.The preparation method of PP composite material and test side
Method is the same as embodiment 1.
Test result shows that the notch impact strength of the PP composite material prepared by the above process is 37.25kJ/m2
(25℃)、6.67kJ/m2(–50℃)。
Embodiment 7
84.5% polypropylene (melt index 0.3g/10min, the content of comonomer ethylene are weighed by weight percentage
For 5mol%), (degree of branching is 99 side chain/1000 carbon to 15% hyperbranched polyethylene, transition temperature is -65 DEG C, Weight-average molecular
Measure for 125 DEG C of 15.1 ten thousand, Mooney viscosity ML (1+4) be in 4.63,99 side chain/1000 carbon methyl content be 58.3mol%,
Ethyl content is 12.4mol%, propyl group content is 5.8mol%, butyl content 3.8mol%, amyl group content be 3.1mol%,
The branching content of carbon number >=6 is 16.6mol%), 0.5% stabilizer B215.The preparation method of PP composite material and test side
Method is the same as embodiment 1.
Test result shows that the notch impact strength of the PP composite material prepared by the above process is 51.55kJ/m2
(25℃)、21.70kJ/m2(–50℃)。
Embodiment 8
79.5% polypropylene (melt index 0.3g/10min, the content of comonomer ethylene are weighed by weight percentage
For 5mol%), (degree of branching is 99 side chain/1000 carbon to 20% hyperbranched polyethylene, transition temperature is -65 DEG C, Weight-average molecular
Measure for 125 DEG C of 15.1 ten thousand, Mooney viscosity ML (1+4) be in 4.63,99 side chain/1000 carbon methyl content be 58.3mol%,
Ethyl content is 12.4mol%, propyl group content is 5.8mol%, butyl content 3.8mol%, amyl group content are
The branching content of 3.1mol%, carbon number >=6 is 16.6mol%), 0.5% stabilizer B215.The preparation method of PP composite material
With method of testing with embodiment 1.
Test result shows that the notch impact strength of the PP composite material prepared by the above process is 39.81kJ/m2
(–50℃)。
Embodiment 9
74.5% polypropylene (melt index 0.3g/10min, the content of comonomer ethylene are weighed by weight percentage
For 5mol%), (degree of branching is 99 side chain/1000 carbon to 25% hyperbranched polyethylene, transition temperature is -65 DEG C, Weight-average molecular
Measure for 125 DEG C of 15.1 ten thousand, Mooney viscosity ML (1+4) be in 4.63,99 side chain/1000 carbon methyl content be 58.3mol%,
Ethyl content is 12.4mol%, propyl group content is 5.8mol%, butyl content 3.8mol%, amyl group content be 3.1mol%,
The branching content of carbon number >=6 is 16.6mol%), 0.5% stabilizer B215.The preparation method of PP composite material and test side
Method is the same as embodiment 1.
Test result shows that the notch impact strength of the PP composite material prepared by the above process is 43.30kJ/m2
(–50℃)。
Embodiment 10
69.5% polypropylene (melt index 0.3g/10min, the content of comonomer ethylene are weighed by weight percentage
For 5mol%), (degree of branching is 99 side chain/1000 carbon to 30% hyperbranched polyethylene, transition temperature is -65 DEG C, Weight-average molecular
Measure for 125 DEG C of 15.1 ten thousand, Mooney viscosity ML (1+4) be in 4.63,99 side chain/1000 carbon methyl content be 58.3mol%,
Ethyl content is 12.4mol%, propyl group content is 5.8mol%, butyl content 3.8mol%, amyl group content be 3.1mol%,
The branching content of carbon number >=6 is 16.6mol%), 0.5% stabilizer B215.The preparation method of PP composite material and test side
Method is the same as embodiment 1.
Test result shows that the notch impact strength of the PP composite material prepared by the above process is 53.82kJ/m2
(–50℃)。
Embodiment 11
Weighing 84.9% polypropylene by weight percentage, (melt index 60g/10min, the content of comonomer ethylene are
10mol%), (degree of branching is 125 side chain/1000 carbon to 15% hyperbranched polyethylene, transition temperature is -67 DEG C, Weight-average molecular
Measure for 125 DEG C of 9.2 ten thousand, Mooney viscosity ML (1+4) be in 2.12,125 side chain/1000 carbon methyl content be 48.7mol%,
Ethyl content is 20.3mol%, propyl group content is 1.8mol%, butyl content 2.8mol%, amyl group content be 2.1mol%,
The branching content of carbon number >=6 is 24.3mol%), 0.1% stabilizer B215.Dry-mixed 3 minutes in super mixer, add
In Haake torque rheometers, the temperature of rheometer is set as 170 DEG C, and rotating speed is 30 revs/min, and the blending time is 5 minutes.Altogether
After mixed end, material is cut into fine particle while hot.The method of testing of PP composite material is the same as embodiment 1.
Test result shows that the notch impact strength of the PP composite material prepared by the above process is 33.86kJ/m2
(–50℃)。
Embodiment 12
Weighing 83% polypropylene by weight percentage, (melt index 0.3g/10min, the content of comonomer ethylene are
5mol%), (degree of branching is 84 side chain/1000 carbon to 15% hyperbranched polyethylene, transition temperature is -61 DEG C, weight average molecular weight
For 125 DEG C of 420,000, Mooney viscosity ML (1+4) be in 86.63,84 side chain/1000 carbon methyl content be 64.5mol%, second
Base content is 7.4mol%, propyl group content is 6.7mol%, butyl content 5.6mol%, amyl group content are 3.7mol%, carbon
Number >=6 branching contents be 12.1mol%), 2.0% stabilizer B215.Dry-mixed 15 minutes in super mixer, add
In Haake torque rheometers, the temperature of rheometer is set as 190 DEG C, and rotating speed is 100 revs/min, and the blending time is 10 minutes.
After blending terminates, material is cut into fine particle while hot.The method of testing of PP composite material is the same as embodiment 1.
Test result shows that the notch impact strength of the PP composite material prepared by the above process is 20.29kJ/m2
(–50℃)。
Comparative example 1
Elastic body toughening agent is changed to ethylene propylene diene rubber [Tao Shi NORDEL IP 3745P, Mooney viscosity ML (1+4) 125
DEG C it is 45, the weight/mass percentage composition of ethylene unit unit is 70%, and the weight/mass percentage composition of ethylidene norbornene is 0.5%, weight
Average molecular weight is 150,000], remaining is the same as embodiment 1.
Test result shows that the bending modulus of the PP composite material prepared by the above process is 1574.5MPa, bending
Intensity is 40.1MPa, and notch impact strength (25 DEG C) is 3.94kJ/m2。
Comparative example 2
Elastic body toughening agent is changed to ethylene propylene diene rubber [Tao Shi NORDEL IP 3745P, Mooney viscosity ML (1+4) 125
DEG C it is 45, the weight/mass percentage composition of ethylene unit unit is 70%, and the weight/mass percentage composition of ethylidene norbornene is 0.5%, weight
Average molecular weight is 150,000], remaining is the same as embodiment 2.
Test result shows that the bending modulus of the PP composite material prepared by the above process is 1378.5MPa, bending
Intensity is 35.2MPa, and notch impact strength (25 DEG C) is 4.2kJ/m2。
Comparative example 3
Elastic body toughening agent is changed to ethylene propylene diene rubber [Tao Shi NORDEL IP 3745P, Mooney viscosity ML (1+4) 125
DEG C it is 45, the weight/mass percentage composition of ethylene unit unit is 70%, and the weight/mass percentage composition of ethylidene norbornene is 0.5%, weight
Average molecular weight is 150,000], remaining is the same as embodiment 3.
Test result shows that the bending modulus of the PP composite material prepared by the above process is 1281.1MPa, bending
Intensity is 32.6MPa, and notch impact strength (25 DEG C) is 4.51kJ/m2。
Comparative example 4
Elastic body toughening agent is changed to ethylene propylene diene rubber [Tao Shi NORDEL IP 3745P, Mooney viscosity ML (1+4) 125
DEG C it is 45, the weight/mass percentage composition of ethylene unit unit is 70%, and the weight/mass percentage composition of ethylidene norbornene is 0.5%, weight
Average molecular weight is 150,000], remaining is the same as embodiment 4.
Test result shows that the bending modulus of the PP composite material prepared by the above process is 1057.8MPa, bending
Intensity is 28.7MPa, and notch impact strength (25 DEG C) is 3.96kJ/m2。
Comparative example 5
Elastic body toughening agent is changed to ethylene propylene diene rubber [Tao Shi NORDEL IP 3745P, Mooney viscosity ML (1+4) 125
DEG C it is 45, the weight/mass percentage composition of ethylene unit unit is 70%, and the weight/mass percentage composition of ethylidene norbornene is 0.5%, weight
Average molecular weight is 150,000], remaining is the same as embodiment 5.
Test result shows that the bending modulus of the PP composite material prepared by the above process is 968.3MPa, bending
Intensity is 24.2MPa, and notch impact strength (25 DEG C) is 3.85kJ/m2。
The polyacrylic notch impact strength (25 DEG C) used in embodiment 1~5 and comparative example 1~5 is 2.04kJ/
m2, bending modulus 2036.3MPa, bending strength 51.7MPa.From embodiment 1~5 and comparative example 1~5, elastomer
Polyacrylic shock strength has been significantly increased in the addition of toughener very much.Pass through the contrast of embodiment 1~5 and comparative example 1~5
Understand, the toughening effect of hyperbranched polyethylene is far above the toughening effect of ethylene propylene diene rubber.When the dosage of ethylene propylene diene rubber
For 20wt% when (comparative example 3), the notch impact strength of PP composite material reaches highest, is 4.51kJ/m2, for original
Begin polyacrylic more than 2 times.However, when the dosage of hyperbranched polyethylene is 20wt% (embodiment 3), polypropylene composite materials material
The notch impact strength of material also reaches highest, is 10.22kJ/m2, it is original polyacrylic 5 times.
Notch impact strength of the polypropylene used in embodiment 6~12 at -50 DEG C is only 4.10kJ/m2, add
After hyperbranched polyethylene, notch impact strength of the PP composite material at -50 DEG C increases substantially, and works as hyperbranched polyethylene
Dosage when be 15wt% (embodiment 7), the notch impact strength of PP composite material is 21.70kJ/m2, it is original
Polyacrylic 5 times.(embodiment 9 and 10), PP composite material when the dosage of hyperbranched polyethylene is more than 25wt%
Notch impact strength more than 43.30kJ/m2, it is original polyacrylic 10 times.Superelevation impact polypropylene provided by the invention is answered
The low-temperature flexibility of condensation material is much better than existing super high impact resistance polypropylene composite material, while remains good rigidity, completely
Meet the requirement of modern automobile industry.
Finally it should be noted that listed above is only specific embodiment of the invention.It is clear that the invention is not restricted to
Above example, there can also be many variations.One of ordinary skill in the art can directly lead from present disclosure
All deformations for going out or associating, are considered as protection scope of the present invention.
Claims (7)
1. a kind of superelevation shock strength PP composite material, it is characterised in that be made up of the raw material of following weight percentage：
Polypropylene：69.5~89.5%；
Elastic body toughening agent：10~30%；
Stabilizer：0.1~2%；
The elastic body toughening agent is hyperbranched polyethylene.
A kind of 2. superelevation shock strength PP composite material according to claim 1, it is characterised in that the polypropylene
Use homo-polypropylene or propylene copolymer of the melt index between 0.3~60g/10min；Wherein, the copolymerization of propylene copolymer
Common monomer is ethene, and its content is in the range of 0~10mol%.
A kind of 3. superelevation shock strength PP composite material according to claim 1, it is characterised in that the elastomer
It for 84~125 side chain/1000 carbon, glass transition temperature is -67 DEG C~-61 DEG C that toughener, which uses the degree of branching, is divided equally again
Son amount is 9.2 ten thousand~420,000, the hyperbranched polyethylene that 125 DEG C of Mooney viscosity ML (1+4) is 2.12~86.63.
4. a kind of superelevation shock strength PP composite material according to claim 3, it is characterised in that described hyperbranched
In 84~125 side chain/1000 carbon of the degree of branching of polyethylene, methyl content is 48.7~64.5mol%, and ethyl content is
7.4~20.3mol%, propyl group content are 1.8~6.7mol%, and butyl content is 2.8~5.6mol%, and amyl group content is 2.1
~3.7mol%, the branching content of carbon number >=6 is 12.1~24.3mol%.
A kind of 5. superelevation shock strength PP composite material according to claim 1, it is characterised in that the stabilizer
For primary antioxidant and the mixture of auxiliary antioxidant, primary antioxidant is hindered phenol or sulphur ester antioxidant, and auxiliary antioxidant is Asia
Phosphate or esters antioxidant.
A kind of 6. superelevation shock strength PP composite material according to claim 5, it is characterised in that the stabilizer
Using antioxidant B215, i.e. primary antioxidant 1010 and auxiliary antioxidant 168 in molar ratio 1:The mixture of 1 mixing.
7. prepare the method for superelevation shock strength PP composite material described in claim 1, it is characterised in that specifically include down
State step：
(1) polypropylene, hyperbranched polyethylene and stabilizer are weighed by following percentage by weights：
Polypropylene：69.5~89.5%；
Elastic body toughening agent：10~30%；
Stabilizer：0.1~2%；
(2) raw material for weighing step (1) adds mixed raw material in super mixer after dry-mixed 3~15 minutes
In Haake torque rheometers, the temperature of rheometer is set as 170~190 DEG C, and rotating speed is 30~100 revs/min, and the time is blended
For 5~10 minutes；After blending terminates, material is cut into particle, that is, required superelevation shock strength PP composite material is made.
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Cited By (6)
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| CN108178874A (en) * | 2017-12-29 | 2018-06-19 | 上海至正道化高分子材料股份有限公司 | A kind of high voltage power cable polypropylene insulation material and preparation method thereof |
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| CN111087702A (en) * | 2019-12-19 | 2020-05-01 | 浙江普利特新材料有限公司 | Low-density, low-shrinkage and ultrahigh-toughness polypropylene nano composite material and preparation method thereof |
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