CN105086155A - Thermally conductive polypropylene-based composite material and preparation method thereof - Google Patents
Thermally conductive polypropylene-based composite material and preparation method thereof Download PDFInfo
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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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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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
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/20—Carboxylic acid amides
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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
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/2224—Magnesium hydroxide
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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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
- C08K2201/003—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
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
Abstract
The invention relates to a thermally conductive polypropylene-based composite material and a preparation method thereof. The thermally conductive polypropylene-based composite material comprises PP and a thermally conductive filler. The conductive filler comprises magnesium hydroxide A with particle diameter of 200-1,500 mesh and magnesium hydroxide B with particle diameter of 5,000-12,000 mesh. The conductive filler of the thermally conductive polypropylene-based composite material employs two kinds of magnesium hydroxide with different particle sizes for complex, so that the magnesium hydroxide particles with large particle diameter form a conductive network, and the magnesium hydroxide particles with small particle size are filled between the large particles to finely fill the conductive network, and to help improve the thermal conductivity of plastics. In addition, magnesium hydroxide belongs to halogen-free flame retardant, and after magnesium hydroxide is added to the PP, the PP gains improved thermal conductivity and certain flame retardance.
Description
Technical field
The invention belongs to thermally conductive material technical field, be specifically related to a kind of matrix material, particularly relate to a kind of heat conduction behavior of polypropylene composites; The invention still further relates to a kind of preparation method of heat conduction behavior of polypropylene composites.
Background technology
PP is a kind of common engineering plastics, is widely used in electric, the field such as household electrical appliance, mechanotronics, car electrics.Its superiority of PP heat-conducting plastic is particularly outstanding in LED Application Areas, and heat-conducting plastic substitutes the once bold leap that aluminium is plastic industry, is also a trend simultaneously.
In order to strengthen the thermal conductivity of PP plastics, conventional way adds heat conductive filler in PP.Such as application number is that the Chinese invention patent application " heat conduction behavior of polypropylene composites and its preparation method and application " (Authorization Notice No. is CN103059565A) of CN201310028780.6 discloses a kind of heat conduction behavior of polypropylene composites, it specifically adds heat conductive filler in PP, and wherein heat conductive filler is specially one or more in boron nitride, aluminium nitride, silicon carbide, Graphite Powder 99, copper powder, aluminium powder, silver powder, carbon nanotube, carbon fiber, Alpha-alumina, magnesium oxide, zinc oxide.Because with the addition of heat conductive filler, the heat conductivility of PP material is made to obtain certain raising; But, in order to increase the flame retardant resistance of this PP material, in this PP matrix material, also additionally with the addition of fire retardant.
In order to ensure the flame retardant resistance of PP material, the way of prior art adds fire retardant in PP.Wherein, magnesium hydroxide is conventional fire retardant, specifically can the application reference number Chinese invention patent application that is CN201210518799.4 " the PP plastic raw materials and preparation method thereof for LED " (Authorization Notice No. is CN103013100A).In the prior art, magnesium hydroxide is a kind of inorganic fill type fire retardant, is added in PP also just in order to obtain certain flame retardant properties.
Therefore, in order to ensure thermal conductivity and the flame retardant resistance of PP material simultaneously, need in PP, to add fire retardant and heat conductive filler, and then add production cost simultaneously.
Summary of the invention
First technical problem to be solved by this invention is to provide a kind of heat conduction behavior of polypropylene composites simultaneously with flame retardant resistance and thermal conductivity, and this heat conduction behavior of polypropylene composites production cost is low.
Second technical problem to be solved by this invention is to provide a kind of preparation method of heat conduction behavior of polypropylene composites.
The present invention solves the technical scheme that above-mentioned first technical problem adopt: a kind of heat conduction behavior of polypropylene composites, comprise PP and heat conductive filler, described heat conductive filler comprises magnesium hydroxide A and magnesium hydroxide B, the particle diameter of described magnesium hydroxide A is 200 ~ 1500 orders, and the particle diameter of described magnesium hydroxide B is 5000 ~ 12000 orders.
Wherein, the particle diameter of described magnesium hydroxide A is preferably 300 ~ 1200,500 ~ 1000 or 500 ~ 800 orders, more preferably 300 orders, 330 orders, 380 orders, 420 orders, 470 orders, 550 orders, 580 orders, 633 orders, 725 orders, 860 orders, 920 orders, 1020 orders, 1120 orders, 1170 orders.
The particle diameter of magnesium hydroxide B is preferably 6000 ~ 11000,7000 ~ 10500 or 8000 ~ 10000 orders, more preferably 5080 orders, 6150 orders, 7080 orders, 7300 orders, 8500 orders, 9250 orders, 10300 orders, 11560 orders or 11850 orders.
Heat conductive filler in this heat conduction behavior of polypropylene composites adopts the magnesium hydroxide of two kinds of different-grain diameters to carry out composite conduct, thus the magnesium hydroxide particle of Large stone forms heat conduction network, and the magnesium hydroxide particle of small particle size is filled between Large stone magnesium hydroxide, thus be fine and closely wovenly filled with heat conduction network, be conducive to the thermal conductivity improving plastics.In addition, magnesium hydroxide belongs to halogen-free flame retardants, is added to after in PP, while raising PP thermal conductivity, also give the certain flame retardant resistance of PP.
This heat conduction behavior of polypropylene composites adds the magnesium hydroxide of different-grain diameter as heat conductive filler using in existing heat conduction behavior of polypropylene composites, makes PP have certain thermal conductivity.As for coarse grain footpath magnesium hydroxide---magnesium hydroxide B and fine grain size magnesium hydroxide---proportioning between magnesium hydroxide A does not then do requirement.
Certainly, preferably, by weight, described magnesium hydroxide A: magnesium hydroxide B=1 ~ 5:1, the mass ratio of the magnesium hydroxide of coarse grain footpath and fine grain size, within the scope of this, can obtain better flame retardant resistance and thermal conductivity simultaneously.Under this proportioning, magnesium hydroxide B can form the heat conduction network playing reasonable heat conductivity energy, and magnesium hydroxide A can just be filled between heat conduction network, thus avoids because magnesium hydroxide A add-on is too many and cause cost to increase.
Preferably, by weight, described magnesium hydroxide A: magnesium hydroxide B=1:1 or 2:1 or 3:1.
In the heat conduction behavior of polypropylene composites of technique scheme, because of character and the function of magnesium hydroxide B and magnesium hydroxide A, as long as make to add above-mentioned heat conductive filler in PP, the certain thermal conductivity of PP just can be given.Certainly, better in order to obtain heat conductivility, the PP plastics that flame retardant properties is also excellent simultaneously, with the weighing scale of heat conduction behavior of polypropylene composites, the massfraction of described heat conductive filler is 40% ~ 75%, such as 45 ~ 70,50 ~ 65,55 ~ 60, more preferably 43%, 47%, 52%, 56%, 63%, 68%, 72%, 73%.
Preferably, the melting index of described PP is 4 ~ 10g/min, preferably 5 ~ 8g/min; Such as 6g/min, 7g/min, 8g/min, 9g/min.
Concrete, this heat conduction behavior of polypropylene composites comprises the component of following parts by weight:
PP20 ~ 50 part;
Heat conductive filler 40 ~ 70 parts.
Wherein, PP is preferably 30 ~ 45 parts, more preferably 35 ~ 40 parts; Such as 22 parts, 25 parts, 32 parts, 36 parts, 43 parts, 48 parts;
Heat conductive filler is preferably 45 ~ 65 parts, more preferably 50 ~ 60 parts; Such as 43 parts, 48 parts, 52 parts, 57 parts, 63 parts, 68 parts.
Wherein, heat conduction behavior of polypropylene composites also comprises auxiliary agent, described auxiliary agent be in coupling agent, oxidation inhibitor, lubricant, whitening agent one or both or two or more.Above-mentioned auxiliary agent is the conven-tional adjuvants that this area uses, the concrete material reference prior art that each auxiliary agent is selected.In addition, the addition of above-mentioned auxiliary agent is with reference to prior art.
As preferably, this heat conduction behavior of polypropylene composites also comprises the component of following parts by weight:
Coupling agent 0.5 ~ 2 part;
0.2 ~ 0.6 part, oxidation inhibitor;
Lubricant 0.5 ~ 2 part;
Wherein, coupling agent is preferably 1 ~ 1.5 part; Such as 0.8 part, 1.1 parts, 1.3 parts, 1.5 parts, 1.8 parts;
Oxidation inhibitor is preferably 0.3 part, 0.4 part, 0.5 part;
Lubricant is preferably 0.6 ~ 1.5 part, more preferably 1.0 ~ 1.5 parts; Such as 0.6 part, 0.8 part, 1.2 parts, 1.6 parts, 1.8 parts.
Preferably, described coupling agent is silane coupling agent, be preferably in KH-550, KH-560, KH-570 one or both or two or more;
Preferably, described oxidation inhibitor be in antioxidant 1010, antioxidant 1076, irgasfos 168 one or both or two or more;
Preferably, described lubricant be in silicone powder, EBS, oxidic polyethylene one or both or two or more.
In addition, this heat conduction behavior of polypropylene composites also comprises whitening agent, and with the weighing scale of heat conduction behavior of polypropylene composites, the massfraction of described whitening agent is 1 ~ 2%;
Preferably, described whitening agent is titanium dioxide.
Wherein, the parts by weight of PP are preferably 30 ~ 45 parts, 35 ~ 40 parts, more preferably 22 parts, 25 parts, 27 parts, 33 parts, 36 parts, 42 parts or 48 parts; Heat conductive filler is preferably 45 ~ 65 parts, 50 ~ 60 parts, more preferably 43 parts, 45 parts, 48 parts, 52 parts, 56 parts, 63 parts, 66 parts or 68; Coupling agent is preferably 0.8 ~ 1.8 part, 1 ~ 1.5 part, more preferably 0.6 part, 0.8 part, 1.2 parts, 1.6 parts, 1.7 parts; Oxidation inhibitor is preferably 0.3 part, 0.4 part, 0.5 part; Lubricant is preferably 0.8 ~ 1.6 part, 1.0 ~ 1.5 parts, more preferably 0.6 part, 0.8 part, 1.2 parts, 1.6 parts, 1.8 parts.
The present invention solves the technical scheme that above-mentioned second technical problem adopt: a kind of preparation method of heat conduction behavior of polypropylene composites, comprises the steps:
(1) heat conductive filler, coupling agent, PP, oxidation inhibitor, lubricant and whitening agent are mixed by proportioning, obtain mixture;
(2) described mixture is extruded, pelletizing, obtain heat conduction behavior of polypropylene composites.
Wherein, in step (1), first described heat conductive filler is mixed with coupling agent, obtain pre-mixing material, and then by PP, oxidation inhibitor, lubricant and whitening agent and pre-mixing mixing of materials, obtain mixture;
Preferably, described pre-mixing material and mixture mix respectively in high-speed mixer;
Preferably, in step (2), described in extrude required forcing machine be twin screw extruder;
Preferably, the temperature of described twin screw extruder is set to: a district: 150 ~ 170 DEG C; 2nd district: 170 ~ 180 DEG C; 3rd district: 180 ~ 190 DEG C; 4th district: 190 ~ 210 DEG C; 5th district: 190 ~ 220 DEG C; 6th district: 200 ~ 220 DEG C; 7th district: 200 ~ 220 DEG C; 8th district: 210 ~ 230 DEG C; 9th district: 200 ~ 220 DEG C; Tenth district: 200 ~ 220 DEG C;
The temperature in above-mentioned ten districts arranges gradually from spout to head, preferably, and a district: 152 DEG C, 155 DEG C, 157 DEG C, 163 DEG C, 165 DEG C, 168 DEG C; 2nd district: 172 DEG C, 175 DEG C, 176 DEG C, 178 DEG C; 3rd district: 182 DEG C, 185 DEG C, 186 DEG C, 187 DEG C; 4th district: 193 DEG C, 195 DEG C, 198 DEG C, 200 DEG C, 203 DEG C, 205 DEG C; 5th district: 193 DEG C, 195 DEG C, 198 DEG C, 208 DEG C, 212 DEG C, 215 DEG C, 218 DEG C; 6th district: 203 DEG C, 205 DEG C, 208 DEG C, 210 DEG C, 212 DEG C, 215 DEG C, 218 DEG C; 7th district: 203 DEG C, 205 DEG C, 208 DEG C, 210 DEG C, 212 DEG C, 215 DEG C, 218 DEG C; 8th district: 213 DEG C, 215 DEG C, 218 DEG C, 220 DEG C, 222 DEG C, 225 DEG C, 228 DEG C; 9th district: 203 DEG C, 205 DEG C, 208 DEG C, 210 DEG C, 212 DEG C, 215 DEG C, 218 DEG C; Tenth district: 203 DEG C, 205 DEG C, 208 DEG C, 210 DEG C, 212 DEG C, 215 DEG C, 218 DEG C.
Preferably, the feeding frequency of described twin screw extruder is 30 ~ 60Hz; Preferably 40 ~ 55Hz; Preferred 45 ~ 50Hz further; Such as 32Hz, 35Hz, 42Hz, 48Hz, 52Hz, 56Hz.
Preferably, the engine speed of described twin screw extruder is 300 ~ 500r/min; Preferably 350 ~ 450r/min, further preferred 400 ~ 450r/min; Such as 330r/min, 380r/min, 420r/min, 480r/min.
Preferably, described pelletizing required equipment is dicing machine, and the rotating speed of described dicing machine is 700 ~ 1100r/min; Preferably 800 ~ 1050r/min, further preferred 900 ~ 1000r/min; Such as 730r/min, 780r/min, 820r/min, 880r/min, 920r/min, 960r/min, 1010r/min, 1030r/min, 1070r/min.
Compared with prior art, the invention has the advantages that: the heat conductive filler of this heat conduction behavior of polypropylene composites adopts the magnesium hydroxide of two kinds of different-grain diameters to carry out composite conduct, thus the magnesium hydroxide particle of Large stone forms heat conduction network, and the magnesium hydroxide particle of small particle size is filled between Large stone magnesium hydroxide, thus be fine and closely wovenly filled with heat conduction network, be conducive to the thermal conductivity improving plastics.In addition, magnesium hydroxide belongs to halogen-free flame retardants, is added to after in PP, while raising PP thermal conductivity, also give the certain flame retardant resistance of PP.
To sum up, because with the addition of the magnesium hydroxide of two kinds of different-grain diameters in PP, make this heat conduction behavior of polypropylene composites not only have thermal conductivity but also have flame retardant resistance, the behavior of polypropylene composites of this heat conduction simultaneously also possesses good over-all properties; In addition, because only needing magnesium hydroxide just to obtain preferably thermal conductivity and flame retardant resistance simultaneously, and then production cost is greatly reduced.
This heat conduction behavior of polypropylene composites can be applicable on LED or cooling water tank, effectively can prevent the local deformaton of burning or Yin Gaowen causes.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
Component and the content thereof of the heat conduction behavior of polypropylene composites of embodiment 1 ~ 4 and comparative example 1,2 are as shown in table 1.Wherein, resin based on PP (polypropylene), the melting index of PP is 4 ~ 10g/min, is specially 8g/min; Coupling agent is KH-550, and oxidation inhibitor is the mixture of 1010 and 168; Lubricant is EBS (N, N'-ethylene bis stearamide), and whitening agent is titanium dioxide.
Heat conductive filler comprises magnesium hydroxide A and magnesium hydroxide B, and the particle diameter of magnesium hydroxide A is 200 ~ 1500 orders, and the particle diameter of magnesium hydroxide B is 5000 ~ 12000 orders; The particle diameter of magnesium hydroxide A and magnesium hydroxide B is selected arbitrarily in above-mentioned scope, concrete, and the particle diameter of magnesium hydroxide A is 800 orders, and the particle diameter of magnesium hydroxide B is 10000 orders.
In the heat conduction behavior of polypropylene composites of each embodiment of table 1., the weight ratio shared by each component
The preparation method of the heat conduction behavior of polypropylene composites of the various embodiments described above is identical, specific as follows:
(1) now magnesium hydroxide A, magnesium hydroxide B and KH-550 are put into high-speed mixer by proportioning and stir evenly, then PP6, EBS, antioxidant 1010, irgasfos 168 and titanium dioxide are put into high-speed mixer by proportioning respectively, stir, obtain mixture;
(2) adopt twin screw extruder to be melt extruded by mixture after and by dicing machine pelletizing, obtain heat conduction behavior of polypropylene composites.
Wherein twin screw is divided into ten districts from spout to head, and the temperature in every district is: a district (spout) 170 DEG C; 2nd district: 170 DEG C; 3rd district: 180 DEG C; 4th district: 190 DEG C; 5th district: 190 DEG C; 6th district: 200 DEG C; 7th district: 210 DEG C; 8th district: 210 DEG C; 9th district: 210 DEG C; Tenth district: 210 DEG C.Feed rate is 50Hz, and twin screw rotating speed (i.e. main frame) rotating speed is 500rpm, and dicing machine rotating speed is 1000rpm.
To embodiment 1 ~ 4, heat conduction behavior of polypropylene composites prepared by comparative example 1,2 carries out performance test (testing standard adopts ASTM), and test result is as shown in table 2:
The performance of heat conduction behavior of polypropylene composites prepared by each embodiment of table 2.
As shown in Table 2, add the heat conductive filler be made up of two kinds of different-grain diameters mixing in PP after, the PP matrix material of preparation has preferably thermal conductivity and flame retardant resistance simultaneously.
Above content is only preferred embodiment of the present invention, and for those of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, this description should not be construed as limitation of the present invention.
Claims (10)
1. a heat conduction behavior of polypropylene composites, comprise PP and heat conductive filler, it is characterized in that: described heat conductive filler comprises magnesium hydroxide A and magnesium hydroxide B, the particle diameter of described magnesium hydroxide A is 200 ~ 1500 orders, and the particle diameter of described magnesium hydroxide B is 5000 ~ 12000 orders.
2. heat conduction behavior of polypropylene composites according to claim 1, is characterized in that: the particle diameter of described magnesium hydroxide A is 500 ~ 800 orders;
Preferably, the particle diameter of described magnesium hydroxide B is 8000 ~ 10000 orders.
3. heat conduction behavior of polypropylene composites according to claim 1, is characterized in that: by weight, described magnesium hydroxide A: magnesium hydroxide B=1 ~ 5:1;
Preferably, by weight, described magnesium hydroxide A: magnesium hydroxide B=1:1 or 2:1 or 3:1.
4. heat conduction behavior of polypropylene composites according to claim 1, is characterized in that: with the weighing scale of heat conduction behavior of polypropylene composites, and the massfraction of described heat conductive filler is 40% ~ 75%.
5. heat conduction behavior of polypropylene composites according to claim 1, is characterized in that: the melting index of described PP is 4 ~ 10g/min.
6. heat conduction behavior of polypropylene composites according to claim 1, is characterized in that, comprises the component of following parts by weight:
PP20 ~ 50 part;
Heat conductive filler 40 ~ 70 parts.
7. heat conduction behavior of polypropylene composites according to claim 6, is characterized in that, also comprises the component of following parts by weight:
Coupling agent 0.5 ~ 2 part;
0.2 ~ 0.6 part, oxidation inhibitor;
Lubricant 0.5 ~ 2 part;
Preferably, described coupling agent is silane coupling agent, be preferably in KH-550, KH-560, KH-570 one or both or two or more;
Preferably, described oxidation inhibitor be in antioxidant 1010, antioxidant 1076, irgasfos 168 one or both or two or more;
Preferably, described lubricant be in silicone powder, EBS, oxidic polyethylene one or both or two or more.
8. heat conduction behavior of polypropylene composites according to claim 7, is characterized in that, also comprise whitening agent, and with the weighing scale of heat conduction behavior of polypropylene composites, the massfraction of described whitening agent is 1 ~ 2%;
Preferably, described whitening agent is titanium dioxide.
9. a preparation method for heat conduction behavior of polypropylene composites according to claim 8, is characterized in that, comprise the steps:
(1) heat conductive filler, coupling agent, PP, oxidation inhibitor, lubricant and whitening agent are mixed by proportioning, obtain mixture;
(2) described mixture is extruded, pelletizing, obtain heat conduction behavior of polypropylene composites.
10. preparation method according to claim 9, it is characterized in that: in step (1), first described heat conductive filler is mixed with coupling agent, obtain pre-mixing material, and then by PP, oxidation inhibitor, lubricant and whitening agent and pre-mixing mixing of materials, obtain mixture;
Preferably, described pre-mixing material and mixture mix respectively in high-speed mixer;
Preferably, in step (2), described in extrude required forcing machine be twin screw extruder;
Preferably, the temperature of described twin screw extruder is set to: a district: 150 ~ 170 DEG C; 2nd district: 170 ~ 180 DEG C; 3rd district: 180 ~ 190 DEG C; 4th district: 190 ~ 210 DEG C; 5th district: 190 ~ 220 DEG C; 6th district: 200 ~ 220 DEG C; 7th district: 200 ~ 220 DEG C; 8th district: 210 ~ 230 DEG C; 9th district: 200 ~ 220 DEG C; Tenth district: 200 ~ 220 DEG C;
Preferably, the feeding frequency of described twin screw extruder is 30 ~ 60Hz;
Preferably, the engine speed of described twin screw extruder is 300 ~ 500r/min;
Preferably, described pelletizing required equipment is dicing machine, and the rotating speed of described dicing machine is 700 ~ 1100r/min.
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| CN107892773A (en) * | 2017-11-24 | 2018-04-10 | 广东威林工程塑料股份有限公司 | A kind of weather-proof heat conduction PP PE PET composite materials and preparation method thereof |
| CN108948417A (en) * | 2018-06-26 | 2018-12-07 | 珠海格力新材料有限公司 | A kind of compounding conductive powder, PP composite material and the preparation method and application thereof |
| CN109251419A (en) * | 2018-07-27 | 2019-01-22 | 重庆会通科技有限公司 | A kind of high thermal conductivity coefficient polypropylene modified material and preparation method thereof |
| CN112662050A (en) * | 2020-12-23 | 2021-04-16 | 珠海光林新材料科技有限公司 | Heat-conducting polypropylene material and preparation method thereof |
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