Polypropylene material of a kind of high strength, high tenacity and preparation method thereof
Technical field
The invention belongs to modified polypropene technical field, especially relate to the polypropylene material and preparation method thereof of a kind of high strength, high tenacity.
Background technology
Polypropylene is one of five large general-purpose plastics, and its density is little, price is low, and application widely.In actual applications, often need to carry out modification to polypropylene, improve polyacrylic intensity or toughness, adapt to the demand of different scene.
Inorganic mineral, as talcum powder, calcium carbonate, mica powder, extensively exist in China, price is low, and does not have toxicity, is often used to carry out modification to reach the object of Reinforced Polypropylene intensity to polypropylene.But, when directly modification being carried out to polypropylene with breeze, easily there is the phenomenons such as dispersion inequality, reunion, cause production efficiency low, and pollute workshop condition.
If but adopted breeze master batch to carry out modification to polypropylene, not only significantly could improve performance and the stability of product, can also enhance productivity, optimize workshop condition.
As Chinese patent CN102093636A discloses a kind of high-performance polypropylene compound material and preparation method thereof, this polypropylene has higher intensity, but shortcoming also clearly, and its shock strength is low, poor toughness.And Chinese patent CN102040768B discloses a kind of polypropylene/calcium carbonate nanocomposite and preparation method thereof, its strength of PP prepared, toughness are all lower, do not meet the needs of practical application.
Summary of the invention
Object of the present invention is exactly to overcome prior art defect, provides the polypropylene material of a kind of high strength, high tenacity.
A polypropylene material for high strength, high tenacity, is made up of by weight following component:
Polypropylene: 40-50 part;
Composite master batch: 50-60 part;
Described composite master batch is made up of by weight following component:
Polyolefin elastomer 20-30 part;
Mica powder 40-50 part;
Nano-calcium carbonate 20-30 part;
Calcium stearate 3 parts;
Erucicamide 4 parts;
Aminopropyl triethoxysilane 3 parts.
Further, described mica powder is wet method white mica powder, and its particle diameter is 600-1250 order.
The present invention adopts particle diameter to be 600-1250 object mica powder of wet process, and its its sheet structure compared with dry ground muscovite mica is better, has better enhancement to polypropylene.
The particle diameter of described nano-calcium carbonate is 20-200nm.
Another object of the present invention is to provide a kind of method of polypropylene material preparing above-mentioned high strength, high tenacity, comprises the following steps:
(1) prepare composite master batch: take 20-30 part polyolefin elastomer, 40-50 part mica powder, 20-30 part nano-calcium carbonate, 3 parts of calcium stearates, 4 parts of erucicamides, 3 parts of aminopropyl triethoxysilanes, carry out mixingly being prepared into composite master batch with Banbury mixer;
(2) prepare polypropylene material: take 40-50 part polypropylene, 50-60 part composite master batch, add in twin screw extruder, at 180-210 DEG C of melt blending, extruding pelletization, obtains the polypropylene material of high strength, high tenacity.
Compared with prior art, the present invention has the following advantages:
1, compared with mica powder master batch filled polypropylene and nano-calcium carbonate master batch filled polypropylene, polypropylene material of the present invention solves the problem that the high tenacity of polypropylene material and high strength can not get both, polypropylene prepared by the present invention also has high tenacity while having high strength, has expanded the Application Areas of polypropylene modified material greatly.
2, in the present invention, composite master batch adopts particle diameter to be the white mica powder of 600-1250 object wet production and particle diameter is the nano-calcium carbonate of 20-200nm, each component is mixed in mixing process evenly, the demixing phenomenon occurred in mixing process can be solved, increase substantially the strength and toughness of composite master batch.
3, the present invention adopts composite master batch modified polypropene, makes it not only can optimization production environment in the process of producing, and reduces the problem of dust pollution, is of value to the healthy of workman; Improve production efficiency simultaneously.
Embodiment
In the embodiment of the present invention, the correlated performance of raw materials is as table 1, and except specified otherwise, in embodiment, each component is all parts by weight.
Table 1 starting material table look-up
Title |
Write a Chinese character in simplified form |
Model |
Supplier |
Polypropylene |
PP |
YPJ1215C |
Raise sub-petrochemical industry |
Nano-calcium carbonate master batch |
-- |
Ca-1 |
Anhui Banni New Material Co., Ltd. |
Mica powder master batch |
-- |
Mica-1 |
Anhui Banni New Material Co., Ltd. |
The composite master batch used in embodiment in the present invention is according to ratio of weight and number, by 20-30 part polyolefin elastomer, 40-50 part mica powder, 20-30 part nano-calcium carbonate, 3 parts of calcium stearates, 4 parts of erucicamides, 3 parts of aminopropyl triethoxysilanes, carry out mixing preparation with Banbury mixer and obtain.
Embodiment 1
(1) prepare composite master batch: take 20 parts of polyolefin elastomers, 40 parts of mica powders, 20 parts of nano-calcium carbonates, 3 parts of calcium stearates, 4 parts of erucicamides, 3 parts of aminopropyl triethoxysilanes, carry out mixingly being prepared into composite master batch with Banbury mixer;
(2) polypropylene material is prepared: take 50 parts of polypropylene YPJ1215C, 50 parts of composite master batchs, add twin screw extruder, at 180-210 DEG C of melt blending, extruding pelletization obtains polypropylene material, and then by its injection moulding sample preparation, carry out performance test, test result is in table 2.
Comparative example 1
Take 50 parts of polypropylene YPJ1215C, 50 parts of nano-calcium carbonate master batches, add twin screw extruder, at 180-210 DEG C of melt blending, extruding pelletization, injection moulding sample preparation, carry out performance test, test result is in table 2.
Comparative example 2
Take 50 parts of polypropylene YPJ1215C, 50 parts of mica powder master batches, add twin screw extruder, at 180-210 DEG C of melt blending, extruding pelletization, injection moulding sample preparation, carry out performance test, test result is in table 2.
Table 2: the performance test results of embodiment 1 and comparative example 1-2
|
Tensile strength |
Flexural strength |
Modulus in flexure |
Simply supported beam notched Izod impact strength |
Testing standard |
ASTM-D638 |
ASTM-D790 |
ASTM-D790 |
ASTM-D6110 |
Measuring unit |
MPa |
MPa |
MPa |
KJ/m2 |
Embodiment 1 |
50 |
60 |
3020 |
50 |
Comparative example 1 |
31 |
40 |
1500 |
40 |
Comparative example 2 |
40 |
49 |
2500 |
15 |
Embodiment 1, compared with comparative example 1, can find: compared with nano-calcium carbonate master batch modified polypropene, and polypropylene material prepared by the present invention is all significantly promoted in tensile strength, flexural strength, modulus in flexure, simply supported beam notched Izod impact strength.
Embodiment 1 is compared with comparative example 2, can find: compared with mica powder master batch modified polypropene, the tensile strength of polypropylene material of the present invention, flexural strength, modulus in flexure all increase, but its simply supported beam notched Izod impact strength improves obviously, illustrates that the toughness of polypropylene material obviously strengthens.
Embodiment 2
(1) prepare composite master batch: take 30 parts of polyolefin elastomers, 50 parts of mica powders, 30 parts of nano-calcium carbonates, 3 parts of calcium stearates, 4 parts of erucicamides, 3 parts of aminopropyl triethoxysilanes, carry out mixingly being prepared into composite master batch with Banbury mixer;
(2) polypropylene material is prepared: take 45 parts of polypropylene YPJ1215C, 55 parts of composite master batchs, add twin screw extruder, at 180-210 DEG C of melt blending, extruding pelletization obtains polypropylene material, and then by its injection moulding sample preparation, carry out performance test, test result is in table 3.
Embodiment 3
(1) prepare composite master batch: take 25 parts of polyolefin elastomers, 45 parts of mica powders, 25 parts of nano-calcium carbonates, 3 parts of calcium stearates, 4 parts of erucicamides, 3 parts of aminopropyl triethoxysilanes, carry out mixingly being prepared into composite master batch with Banbury mixer;
(2) polypropylene material is prepared: take 40 parts of polypropylene YPJ1215C, 60 parts of composite master batchs, add twin screw extruder, at 180-210 DEG C of melt blending, extruding pelletization obtains polypropylene material, and then by its injection moulding sample preparation, carry out performance test, test result is in table 3.
Table 3: embodiment 1-3 the performance test results
|
Tensile strength |
Flexural strength |
Modulus in flexure |
Simply supported beam notched Izod impact strength |
Testing standard |
ASTM-D638 |
ASTM-D790 |
ASTM-D790 |
ASTM-D6110 |
Measuring unit |
MPa |
MPa |
MPa |
KJ/m2 |
Embodiment 1 |
50 |
60 |
3020 |
50 |
Embodiment 2 |
55 |
63 |
3520 |
53 |
Embodiment 3 |
58 |
66 |
3950 |
55 |
As can be seen from Table 3, along with composite master batch fills the raising of content, intensity and the toughness of polypropylene material promote all to some extent.
The above-mentioned description to embodiment can understand and apply the invention for the ease of those skilled in the art.Person skilled in the art obviously easily can make various amendment to these embodiments, and General Principle described herein is applied in other embodiments and need not through performing creative labour.Therefore, the invention is not restricted to embodiment here, those skilled in the art, according to announcement of the present invention, do not depart from improvement that scope makes and amendment all should within protection scope of the present invention.