CN102382454B - High-strength antistatic heat-conductive PPA (Polyphthalamide) material and preparation method of same - Google Patents
High-strength antistatic heat-conductive PPA (Polyphthalamide) material and preparation method of same Download PDFInfo
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 36
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- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical group [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 claims description 9
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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
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
-
- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
-
- 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
-
- 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
- B29C2948/92514—Pressure
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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
- B29C2948/92561—Time, e.g. start, termination, duration or interruption
-
- 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
-
- 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
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
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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
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92904—Die; Nozzle zone
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- Engineering & Computer Science (AREA)
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention provides a high-strength antistatic heat-conductive PPA (Polyphthalamide) material containing the components in percent by weight as follows: 35-55% of PPA, 15-25% of carbon fiber, 5-10% of graphite, 10-20% of aluminium nitride, 10-15% of fire retardant, 0.5-1.0% of heat stabilizer and 0.1-0.3% of nucleating agent. The invention also provides a preparation method of the high-strength antistatic heat-conductive PPA material. The preparation method includes the steps as follows: selecting the materials in percent by weight as above; mixing the PPA, the graphite, the aluminium nitride, the fire retardant, the heat stabilizer and the nucleating agent to be uniform, thus obtaining a mixed raw material; placing the mixed material in a double-screw extruder and doping the mixed material with the carbon fiber; and then conducting melt extrusion and granulation to obtain the high-strength antistatic heat-conductive PPA material. The product made of the PPA material is high in mechanical strength, excellent in heat resistance and difficult to burn and has an antistatic effect; besides, the product made from the PPA material has a high heat-conducting effect.
Description
Technical field
The invention belongs to technical field of polymer materials, be specifically related to a kind of high strength anti-electrostatic heat-conducting type PPA material and preparation method thereof.
Background technology
Under the drive of electronic enterprises high speed development, more and more higher to the requirement of macromolecular material.Some large servers for example, relative common computer, stream time is long, thermal value is large, job stability requires high, under such prerequisite, macromolecular material is applied to the server accessory, not only needs high strength, height is heat-resisting but also needs are splendid anti-static effect and radiating effect.Notebook industry and for example, thermal diffusivity and the dustproof important performance indexes of weighing a notebook that becomes, macromolecular material is used for notebook computer, more and more the coming into one's own of thermal conductivity and anti-static effect.
The PPA material is a kind of hemicrystalline thermoplasticity aromatic polyamide, belong to the aromatic series high-temperature nylon, the life-time service temperature can reach 180 ℃, short-term is high temperature resistant to reach 290 ℃, have the advantages such as intensity is good, high performance-price ratio, low water absorption, dimensional stability, particularly at high temperature still have high strength and splendid dimensional stability, be commonly used to make connector, junctor, high strength heat resistant parts etc.But, it is applied to electronic enterprises, the electrical property of PPA material, thermal characteristics and intensity can not meet the demands, and it does not have the characteristics of difficult combustion and anti-electrostatic yet.
Summary of the invention
The embodiment of the invention provides a kind of high strength anti-electrostatic heat-conducting type PPA material and preparation method thereof, is intended to solve the problem of PPA electrical property, thermal characteristics and intensity difference in the prior art.
A kind of high strength anti-electrostatic heat-conducting type PPA material, it comprises the following component according to weight percent:
Polyphthalamide 35～55%;
Carbon fiber 15～25%;
Graphite 5～10%;
Aluminium nitride 10～20%;
Fire retardant 10～15%;
Thermo-stabilizer 0.5～1.0%;
Nucleator 0.1～0.3%.
And, a kind of high strength anti-electrostatic heat-conducting type PPA material preparation method, it comprises the steps:
Choose raw material according to weight percent, described raw material comprises polyphthalamide PPA 35～55%, carbon fiber 15～25%, graphite 5～10%, aluminium nitride 10～20%, fire retardant 10～15%, thermo-stabilizer 0.5～1.0%, nucleator 0.1～0.3%;
Polyphthalamide, graphite, aluminium nitride, fire retardant, thermo-stabilizer and nucleator are mixed, get mixing raw material;
Above-mentioned mixing raw material is placed twin screw extruder and carbon fiber blending, and through melt extruding, granulation obtains described high strength anti-electrostatic heat-conducting type PPA material.
The high strength anti-electrostatic heat-conducting type PPA material that the embodiment of the invention provides, by adopting the rationally composite of glass polyphthalamide, carbon fiber, graphite, aluminium nitride, fire retardant, thermo-stabilizer and nucleator, when having guaranteed that material has high strength, high heat-resisting, difficult combustion, also have anti-static effect and high thermal conductivity.In addition, the starting material of its use all are the environmentally-friendly sanitary levels, and the material of preparation contacts with human body can not cause any harmful material.Further, this high strength anti-electrostatic heat-conducting type PPA material preparation method adopts the disposable technique of finishing of mixing reaction extruding pelletization, and its preparation method technique is simple, and is easy to operate, high efficiency, and cost is low, is suitable for suitability for industrialized production.
Description of drawings
Fig. 1 is the schema of the high strength anti-electrostatic heat-conducting type PPA material preparation method of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
A kind of high strength anti-electrostatic heat-conducting type PPA material of the embodiment of the invention, it comprises the following component according to weight percent:
Polyphthalamide 35～55%;
Carbon fiber 15～25%;
Graphite 5～10%;
Aluminium nitride 10～20%;
Fire retardant 10～15%;
Thermo-stabilizer 0.5～1.0%;
Nucleator 0.1～0.3%.
Described polyphthalamide is the half hitch crystalline resin.
Described carbon fiber is chopped strand, preferably, and chopped length 5～12mm.Carbon fiber is a kind of novel material of mechanical property excellence, light specific gravity, and specific modulus is higher than steel, has the characteristic of conductive and heat-conductive.The carbon fiber reinforced macromolecular material has splendid physical strength, can also improve electrical property and the thermal characteristics of material simultaneously.
Described graphite is oildag, and size is the 1500-4000 order.Graphite is a kind of allotropic substance of carbon, and chemical stability is good, and matter is soft, and electrical and thermal conductivity is good, has lubricated effect.
Described aluminium nitride is powder-type, and size is the 1500-4000 order.Aluminium nitride belongs to atomic crystal, good stability, and intensity is high, along with the rising strength degradation of temperature is slower, good heat conductivity.
Described fire retardant is halogen-free flame retardants, is preferably hypophosphite.
Described thermo-stabilizer is space hindered phenol antioxygen and phosphatic mixture.Irradiation under the condition of certain humidity and oxygen, coupled reaction can occur and produce the quinones substance with conjugated double bond structures in phenol antioxidant, this class material is subjected to long wave part in the product visible light absorbing of the decomposition after the illumination and displaing yellow, therefore often select some to have the phenolic compound of steric restriction
Described nucleator is to grow the carbochain composition as main carboxylic acid calcium salt.Its nucleogenesis causes rapid crystallization to form less spherocrystal body, has improved the mechanical property of end article, and shortens cooling time, thereby has shortened the production cycle in the injection moulding, can avoid adding simultaneously other lubricant or releasing agent again.
See also Fig. 1, show a kind of high strength anti-electrostatic heat-conducting type PPA material preparation method of the embodiment of the invention, the method comprises the steps:
S01: choose raw material according to weight percent, described raw material comprises polyphthalamide PPA35～55%, carbon fiber 15～25%, graphite 5～10%, aluminium nitride 10～20%, fire retardant 10～15%, thermo-stabilizer 0.5～1.0%, nucleator 0.1～0.3%;
S02: polyphthalamide, graphite, aluminium nitride, fire retardant, thermo-stabilizer and nucleator are mixed, get mixing raw material;
S03: above-mentioned mixing raw material is placed twin screw extruder and carbon fiber blending, and through melt extruding, granulation obtains described high strength anti-electrostatic heat-conducting type PPA material.
Among the step S01, all material weighings are accurate, are accurate to 0.001 kilogram, put into corresponding material bag and carry out sign.
Step S02 is specially, and at first pours polyphthalamide resin, graphite and aluminium nitride into whipping device, mixes, get original mixture, and then the fire retardant that weighs up, thermo-stabilizer and nucleator, put in the mixing tank with original mixture and to mix, get mixing raw material.Mix respectively the mixing raw material that is more conducive to be uniformly mixed according to each component property.
Among the step S03, above-mentioned mixing raw material is put into the loading hopper of twin screw extruder, carbon fiber joins in the forcing machine by the side feeding, through melt extruding granulation; The temperature of each section is preferably respectively in the forcing machine: 260～280 ℃ of twin screw extruder one district's temperature, 290～310 ℃ of two district's temperature, 300～310 ℃ of three district's temperature, 290～300 ℃ of four district's temperature, 300～310 ℃ of heads; The residence time 2～3min; Pressure is 15～18MPa.
The high strength anti-electrostatic heat-conducting type PPA material that the embodiment of the invention provides adds auxiliary agent by choose reasonable, obtains the PPA material of excellent combination property, and not only intensity is high, heat-resisting good for it, and difficult combustion also has good anti-static effect and high thermal conductivity.Carbon fiber is a kind of novel material of mechanical property excellence, light specific gravity, and specific modulus is higher than steel, has the characteristic of conductive and heat-conductive.The carbon fiber reinforced macromolecular material has splendid physical strength, can also improve electrical property and the thermal characteristics of material simultaneously.Graphite is a kind of allotropic substance of carbon, and chemical stability is good, and matter is soft, and electrical and thermal conductivity is good, has lubricated effect.Aluminium nitride belongs to atomic crystal, good stability, and intensity is high, along with the rising strength degradation of temperature is slower, good heat conductivity.Additive therefor is commercially available, and production cost is low, and described high strength anti-electrostatic heat-conducting type PPA material produce technique is simple, easily control.The high strength anti-electrostatic heat-conducting type PPA material that obtains can be widely used in the electronic enterprises such as server element, notebook computer accessory, electricity-saving lamp parts.
Below embodiment by concrete prescription and preparation method above-mentioned high strength anti-electrostatic heat-conducting type PPA material and preparation method thereof is described.
Embodiment 1:
Component and the weight percentage thereof of the high strength anti-electrostatic heat-conducting type PPA material of present embodiment are:
Polyphthalamide 35%;
Carbon fiber 25%;
Graphite 9%;
Aluminium nitride 20%;
Fire retardant 10%;
Thermo-stabilizer 0.8%;
Nucleator 0.2%.
Wherein, described polyphthalamide resin is that Su Wei company produces the half hitch crystalline resin of trade names A-1000; Described carbon fiber is that toray company produces, and trade names are that the chopped length of T300-T6 is at the chopped strand of 5～8mm; The trade names that described Qingdao Bai Chuan company limited produces are the oildag of TF-1; Described aluminium nitride is that to step the trade names that special Kechuang company limited produces be the powder-type aluminium nitride of N-3 in Qingzhou; Described fire retardant is that the trade names that Clariant company produces are the hypophosphite halogen-free flame retardants of OP1230; Described thermo-stabilizer is that the trade names that Brueggemann company produces are space hindered phenol antioxygen and the phosphatic Synergistic blend of H161; Described nucleator be trade names that Clariant company produces be Licomont CAV102 to grow the carbochain composition as main carboxylic acid calcium salt.
PPA is 35% by weight percentage (following all be weight percentage), graphite 9% and aluminium nitride 20%, weigh up and pour agitator into, stir, again fire retardant 10%, thermo-stabilizer 0.8% and nucleator 0.2% are weighed up, pour agitator into and stir, get mixture.The material that mixes is joined in the hopper of twin screw extruder, 25% carbon fiber joins in the forcing machine by the side feeding, and through melt blending, extruding pelletization becomes matrix material.Wherein, each heating region temperature setting of screw rod is respectively: 270 ℃ of district's temperature, 290 ℃ of two district's temperature, 310 ℃ of three district's temperature, 300 ℃ of four district's temperature, 310 ℃ of heads.The residence time 2～3min.Pressure is 16MPa.
Embodiment 2:
Component and the weight percentage thereof of the high strength anti-electrostatic heat-conducting type PPA material of present embodiment are:
Polyphthalamide 45%;
Carbon fiber 20%;
Graphite 7%;
Aluminium nitride 15%;
Fire retardant 12%;
Thermo-stabilizer 0.8%;
Nucleator 0.2%.
Wherein, described polyphthalamide resin is that Su Wei company produces the half hitch crystalline resin of trade names A-1000; Described carbon fiber is that toray company produces, and trade names are that the chopped length of T300-T6 is at the chopped strand of 5～8mm; The trade names that described Qingdao Bai Chuan company limited produces are the oildag of TF-1; Described aluminium nitride is that to step the trade names that special Kechuang company limited produces be the powder-type aluminium nitride of N-3 in Qingzhou; Described fire retardant is that the trade names that Clariant company produces are the hypophosphite halogen-free flame retardants of OP1230; Described thermo-stabilizer is that the trade names that Brueggemann company produces are space hindered phenol antioxygen and the phosphatic Synergistic blend of H161; Described nucleator be trade names that Clariant company produces be Licomont CAV102 to grow the carbochain composition as main carboxylic acid calcium salt.
PPA is 45% by weight percentage (following all be weight percentage), graphite 7% and aluminium nitride 15%, weigh up and pour agitator into, stir, again fire retardant 12%, thermo-stabilizer 0.8% and nucleator 0.2% are weighed up, pour agitator into and stir, get mixture.The material that mixes is joined in the hopper of twin screw extruder, 25% carbon fiber joins in the forcing machine by the side feeding, and through melt blending, extruding pelletization becomes matrix material.Wherein, each heating region temperature setting of screw rod is respectively: 270 ℃ of district's temperature, 290 ℃ of two district's temperature, 310 ℃ of three district's temperature, 300 ℃ of four district's temperature, 310 ℃ of heads.The residence time 2～3min.Pressure is 16MPa.
Embodiment 3:
Component and the weight percentage thereof of the high strength anti-electrostatic heat-conducting type PPA material of present embodiment are:
Polyphthalamide 55%;
Carbon fiber 15%;
Graphite 5%;
Aluminium nitride 10%;
Fire retardant 14%;
Thermo-stabilizer 0.8%;
Nucleator 0.2%.
Wherein, described polyphthalamide resin is that Su Wei company produces the half hitch crystalline resin of trade names A-1000; Described carbon fiber is that toray company produces, and trade names are that the chopped length of T300-T6 is at the chopped strand of 5～8mm; The trade names that described Qingdao Bai Chuan company limited produces are the oildag of TF-1; Described aluminium nitride is that to step the trade names that special Kechuang company limited produces be the powder-type aluminium nitride of N-3 in Qingzhou; Described fire retardant is that the trade names that Clariant company produces are the hypophosphite halogen-free flame retardants of OP1230; Described thermo-stabilizer is that the trade names that Brueggemann company produces are space hindered phenol antioxygen and the phosphatic Synergistic blend of H161; Described nucleator be trade names that Clariant company produces be Licomont CAV102 to grow the carbochain composition as main carboxylic acid calcium salt.
PPA is 55% by weight percentage (following all be weight percentage), graphite 5% and aluminium nitride 10%, weigh up and pour agitator into, stir, again fire retardant 14%, thermo-stabilizer 0.8% and nucleator 0.2% are weighed up, pour agitator into and stir, get mixture.The material that mixes is joined in the hopper of twin screw extruder, 15% carbon fiber joins in the forcing machine by the side feeding, and through melt blending, extruding pelletization becomes matrix material.Wherein, each heating region temperature setting of screw rod is respectively: 270 ℃ of district's temperature, 290 ℃ of two district's temperature, 310 ℃ of three district's temperature, 300 ℃ of four district's temperature, 310 ℃ of heads.The residence time 2～3min.Pressure is 16MPa.
Comparative Examples 1:
Component and the weight percentage thereof of the PPA material of present embodiment are:
Polyphthalamide 45%;
Graphite 17%;
Aluminium nitride 25%;
Fire retardant 12%;
Thermo-stabilizer 0.8%;
Nucleator 0.2%.
Wherein, described polyphthalamide resin is that Su Wei company produces the half hitch crystalline resin of trade names A-1000; The trade names that described Qingdao Bai Chuan company limited produces are the oildag of TF-1; Described aluminium nitride is that to step the trade names that special Kechuang company limited produces be the powder-type aluminium nitride of N-3 in Qingzhou; Described fire retardant is that the trade names that Clariant company produces are the hypophosphite halogen-free flame retardants of OP1230; Described thermo-stabilizer is that the trade names that Brueggemann company produces are space hindered phenol antioxygen and the phosphatic Synergistic blend of H161; Described nucleator be trade names that Clariant company produces be Licomont CAV102 to grow the carbochain composition as main carboxylic acid calcium salt.
PPA is 45% by weight percentage (following all be weight percentage), graphite 17% and aluminium nitride 15%, weigh up and pour agitator into, stir, again fire retardant 12%, thermo-stabilizer 0.8% and nucleator 0.2% are weighed up, pour agitator into and stir, get mixture.The material that mixes is joined in the hopper of twin screw extruder, through melt blending, extruding pelletization becomes matrix material.Wherein, each heating region temperature setting of screw rod is respectively: 270 ℃ of district's temperature, 290 ℃ of two district's temperature, 310 ℃ of three district's temperature, 300 ℃ of four district's temperature, 310 ℃ of heads.The residence time 2～3min.Pressure is 16MPa.
Comparative Examples 2:
Component and the weight percentage thereof of the PPA material of present embodiment are:
Polyphthalamide 45%;
Carbon fiber 20%;
Aluminium nitride 22%;
Fire retardant 12%;
Thermo-stabilizer 0.8%;
Nucleator 0.2%.
Wherein, described polyphthalamide resin is that Su Wei company produces the half hitch crystalline resin of trade names A-1000; Described carbon fiber is that toray company produces, and trade names are that the chopped length of T300-T6 is at the chopped strand of 5～8mm; Described aluminium nitride is that to step the trade names that special Kechuang company limited produces be the powder-type aluminium nitride of N-3 in Qingzhou; Described fire retardant is that the trade names that Clariant company produces are the hypophosphite halogen-free flame retardants of OP1230; Described thermo-stabilizer is that the trade names that Brueggemann company produces are space hindered phenol antioxygen and the phosphatic Synergistic blend of H161; Described nucleator be trade names that Clariant company produces be Licomont CAV102 to grow the carbochain composition as main carboxylic acid calcium salt.
PPA is 45% by weight percentage (following all be weight percentage) and aluminium nitride 22%, weigh up and pour agitator into, stir, again fire retardant 12%, thermo-stabilizer 0.8% and nucleator 0.2% are weighed up, pour agitator into and stir, get mixture.The material that mixes is joined in the hopper of twin screw extruder, 20% carbon fiber joins in the forcing machine by the side feeding, and through melt blending, extruding pelletization becomes matrix material.Wherein, each heating region temperature setting of screw rod is respectively: 270 ℃ of district's temperature, 290 ℃ of two district's temperature, 310 ℃ of three district's temperature, 300 ℃ of four district's temperature, 310 ℃ of heads.The residence time 2～3min.Pressure is 16MPa.
Comparative Examples 3:
Component and the weight percentage thereof of the PPA material of present embodiment are:
Polyphthalamide 45%;
Carbon fiber 25%;
Graphite 17%;
Fire retardant 12%;
Thermo-stabilizer 0.8%;
Nucleator 0.2%.
Wherein, described polyphthalamide resin is that Su Wei company produces the half hitch crystalline resin of trade names A-1000; Described carbon fiber is that toray company produces, and trade names are that the chopped length of T300-T6 is at the chopped strand of 5～8mm; The trade names that described Qingdao Bai Chuan company limited produces are the oildag of TF-1; Described fire retardant is that the trade names that Clariant company produces are the hypophosphite halogen-free flame retardants of OP1230; Described thermo-stabilizer is that the trade names that Brueggemann company produces are space hindered phenol antioxygen and the phosphatic Synergistic blend of H161; Described nucleator be trade names that Clariant company produces be Licomont CAV102 to grow the carbochain composition as main carboxylic acid calcium salt.
PPA is 45% by weight percentage (following all be weight percentage) and graphite 17%, weigh up and pour agitator into, stir, again fire retardant 12%, thermo-stabilizer 0.8% and nucleator 0.2% are weighed up, pour agitator into and stir, get mixture.The material that mixes is joined in the hopper of twin screw extruder, 25% carbon fiber joins in the forcing machine by the side feeding, and through melt blending, extruding pelletization becomes matrix material.Wherein, each heating region temperature setting of screw rod is respectively: 270 ℃ of district's temperature, 290 ℃ of two district's temperature, 310 ℃ of three district's temperature, 300 ℃ of four district's temperature, 310 ℃ of heads.The residence time 2～3min.Pressure is 16MPa.
Will be by the PPA material of embodiment 1～3 and Comparative Examples 1～3 preparation under 120～130 ℃ of conditions dry 3～5 hours, and then the particulate material that drying is good carries out the injection molding sample preparation in injector, carries out performance test.
Tensile strength is tested by ASTM D638 standard, and specimen types is II type sample, batten size (mm): 115 (length) * (6 ± 0.04) (middle parallel portion width) * 2 (thickness), and draw speed is 50mm/min; Flexural strength is tested by ASTM D790 standard.Specimen types is specimen size (mm): (80 ± 0.4) * (10 ± 0.1) * (4 ± 0.02), rate of bending are 20mm/min; The surface resistivity test is tested according to ASTM D257 standard, and probe temperature is 23 ℃, relative humidity 50 ± 5%; Density measurement is tested according to ASTM D792 standard, and specimen types is specimen size (mm): (50 ± 0.2) * (5 ± 0.02) * (5 ± 0.02). and probe temperature is 23 ℃.
The performance of embodiment 1～3 and Comparative Examples 1～3 is as shown in table 1 respectively.
Table 1
The data that contrast in the above-mentioned table 1 can draw, and carbon fiber has obvious enhancement to the PPA material, and mechanical property and the thermal distortion of material had obvious lifting, and the fire retardant hypophosphite is halogen-free flameproof, the composite environmental-friendly developing direction, and flame retardant effect is stable; The material electric conductivity that compares Comparative Examples 1 and 2, carbon fiber is better than graphite to the lifting of material electric conductivity, this is because the dispersion effect of carbon fiber in the PPA material is better than graphite, but the situation that minor insulation still occurs easily, this is because carbon fiber distributes even not enough, cause to open circuit at material internal to cause, and after the carbon fiber composite graphite strengthened PPA in the Comparative Examples 3, the resistivity of material was from 10
5Rise to 10
2, this is because graphite is dispersed between matrix resin and the carbon fiber at material internal, connects the carbon fiber that is dispersed in the resin, makes the conduction of material more unobstructed, can not cause breaking phenomena; Can find out that from embodiment 1 and Comparative Examples 1,3 aluminium nitride is the most obvious to the heat conductivility lifting of material, after the content of aluminium nitride brought up to 20% from 0, the thermal conductivity of material directly brought up to 3.4 from 1.4; Comparative example 1 and Comparative Examples 2, conductive graphite promotes also comparatively obvious to the thermal conductivity of material.In sum, carbon fiber composite graphite, aluminium nitride strengthen the PPA alloy, and excellent combination property is fit to be applied to the electronic applications such as server element, notebook computer accessory, electricity-saving lamp parts.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a high strength anti-electrostatic heat-conducting type PPA material is characterized in that, comprises the following component according to weight percent:
Polyphthalamide 35～55%;
Carbon fiber 15～25%;
Graphite 5～10%;
Aluminium nitride 10～20%;
Fire retardant 10～15%;
Thermo-stabilizer 0.5～1.0%;
Nucleator 0.1～0.3%.
2. high strength anti-electrostatic heat-conducting type PPA material as claimed in claim 1 is characterized in that described polyphthalamide is the half hitch crystalline resin.
3. high strength anti-electrostatic heat-conducting type PPA material as claimed in claim 1 is characterized in that described carbon fiber is chopped strand, chopped length 5～12mm.
4. high strength anti-electrostatic heat-conducting type PPA material as claimed in claim 1 is characterized in that described graphite is oildag, and size is the 1500-4000 order.
5. high strength anti-electrostatic heat-conducting type PPA material as claimed in claim 1 is characterized in that described aluminium nitride is powder-type, and size is the 1500-4000 order.
6. high strength anti-electrostatic heat-conducting type PPA material as claimed in claim 1 is characterized in that described fire retardant is halogen-free flame retardants, and described halogen-free flame retardants is hypophosphite.
7. high strength anti-electrostatic heat-conducting type PPA material as claimed in claim 1 is characterized in that described thermo-stabilizer is space hindered phenol antioxygen and phosphatic mixture.
8. high strength anti-electrostatic heat-conducting type PPA material as claimed in claim 1 is characterized in that, described nucleator is to grow the carbochain composition as main carboxylic acid calcium salt.
9. high strength anti-electrostatic heat-conducting type PPA material preparation method, it comprises the steps:
Choose raw material according to weight percent, described raw material comprises polyphthalamide PPA35～55%, carbon fiber 15～25%, graphite 5～10%, aluminium nitride 10～20%, fire retardant 10～15%, thermo-stabilizer 0.5～1.0%, nucleator 0.1～0.3%;
Polyphthalamide, graphite, aluminium nitride, fire retardant, thermo-stabilizer and nucleator are mixed, get mixing raw material;
Above-mentioned mixing raw material is placed twin screw extruder and carbon fiber blending, and through melt extruding, granulation obtains described high strength anti-electrostatic heat-conducting type PPA material.
10. high strength anti-electrostatic heat-conducting type PPA material preparation method as claimed in claim 9, it is characterized in that, described mixing raw material is with polyphthalamide resin, graphite and aluminium nitride are poured whipping device into, mix, get original mixture, and then the fire retardant that weighs up, thermo-stabilizer and nucleator, put in the mixing tank with original mixture and to be mixed to get, described twin screw extruder is set to: 260～280 ℃ of district's temperature, 290～310 ℃ of two district's temperature, 300～310 ℃ of three district's temperature, 290～300 ℃ of four district's temperature, 300～310 ℃ of heads, the residence time 2～3min, pressure are 15～18MPa.
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| CN104479352A (en) * | 2014-12-18 | 2015-04-01 | 安徽科聚新材料有限公司 | Polyphthalamide (PPA) composite material with high temperature resistance and abrasion resistance and preparation method of PPA composite material |
| CN108239392A (en) * | 2016-12-27 | 2018-07-03 | 上海杰事杰新材料(集团)股份有限公司 | A kind of ball-type aluminium nitride-expanded graphite enhancing high heat conduction PP/PA6 composite materials and preparation method thereof |
| CN111073276A (en) * | 2019-12-19 | 2020-04-28 | 珠海市派特尔科技股份有限公司 | Composite material with high mechanical property and preparation method thereof |
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| CN101948619A (en) * | 2010-09-29 | 2011-01-19 | 深圳市科聚新材料有限公司 | poly(nonamethyleneterephthalamide) material and preparation method thereof |
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| CN101948619A (en) * | 2010-09-29 | 2011-01-19 | 深圳市科聚新材料有限公司 | poly(nonamethyleneterephthalamide) material and preparation method thereof |
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