CN113337113A - PPA/LCP composite material and preparation method thereof - Google Patents
PPA/LCP composite material and preparation method thereof Download PDFInfo
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- CN113337113A CN113337113A CN202110715953.6A CN202110715953A CN113337113A CN 113337113 A CN113337113 A CN 113337113A CN 202110715953 A CN202110715953 A CN 202110715953A CN 113337113 A CN113337113 A CN 113337113A
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- ppa
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- 239000002131 composite material Substances 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 229920005989 resin Polymers 0.000 claims abstract description 50
- 239000011347 resin Substances 0.000 claims abstract description 50
- 239000003365 glass fiber Substances 0.000 claims abstract description 34
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 15
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 15
- 239000002270 dispersing agent Substances 0.000 claims abstract description 15
- 239000002667 nucleating agent Substances 0.000 claims abstract description 15
- 239000012745 toughening agent Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims description 23
- 239000000203 mixture Substances 0.000 claims description 6
- -1 carboxylic acid sodium salt Chemical class 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 4
- 229920006395 saturated elastomer Polymers 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 2
- 239000000806 elastomer Substances 0.000 claims description 2
- 229920000587 hyperbranched polymer Polymers 0.000 claims description 2
- 229920006346 thermoplastic polyester elastomer Polymers 0.000 claims description 2
- 229920001577 copolymer Polymers 0.000 claims 1
- 238000000465 moulding Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 3
- 239000004954 Polyphthalamide Substances 0.000 description 58
- 229920006375 polyphtalamide Polymers 0.000 description 58
- 239000000463 material Substances 0.000 description 21
- 239000002245 particle Substances 0.000 description 21
- 238000005520 cutting process Methods 0.000 description 14
- 238000001125 extrusion Methods 0.000 description 14
- 238000001035 drying Methods 0.000 description 7
- 230000003014 reinforcing effect Effects 0.000 description 4
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- 229920006012 semi-aromatic polyamide Polymers 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229920003231 aliphatic polyamide Polymers 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229920001870 copolymer plastic Polymers 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000012643 polycondensation polymerization Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a PPA/LCP composite material and a preparation method thereof, wherein the PPA/LCP composite material comprises the following components in parts by weight: 20-70 parts of PPA resin; 10-30 parts of LCP resin; 20-50 parts of glass fiber; 10-30 parts of sericite; 5-10 parts of a compatible toughening agent; 0.5-1 part of a dispersant; 0.5-1 part of antioxidant; 0.5-1 part of nucleating agent. According to the PPA/LCP composite material prepared by the invention, the LCP resin is added into the PPA resin, so that the viscosity of the PPA resin in the molding process can be effectively reduced, and the molding processability of the composite material is improved.
Description
Technical Field
The invention relates to the field of high polymer materials, in particular to a PPA/LCP composite material and a preparation method thereof.
Background
The polyphthalamide (PPA) belongs to one of special engineering plastics, and is prepared by the condensation polymerization of aliphatic diamine or diacid and aromatic diacid or diamine, and as the main chain of the polymer contains aromatic rings, compared with the traditional aliphatic nylon, the PPA has the advantages that the molecular chain movement is limited, the glass transition temperature is obviously improved, the heat resistance and the mechanical property are enhanced, the water absorption is reduced, and the PPA has good dimensional stability.
Accordingly, there is still a need for advancement and development of the prior art.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a PPA/LCP composite material and a preparation method thereof, aiming at solving the technical problem of poor processability of the existing semi-aromatic nylon material.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a PPA/LCP composite material, which comprises the following components in parts by weight:
the PPA/LCP composite material is characterized in that the melting temperature of the LCP resin is 300-400 ℃.
The PPA/LCP composite material is characterized in that the compatible toughening agent is one or more of MBS resin, styrene elastomer grafted maleic anhydride copolymer or thermoplastic polyester elastomer.
The PPA/LCP composite material is characterized in that the glass fibers comprise short glass fibers and long glass fibers.
The PPA/LCP composite material is characterized in that the diameter of the short glass fiber is 5-10um, and the length-diameter ratio is 30: 1.
The PPA/LCP composite material is characterized in that the dispersant is a hyperbranched polymer.
The PPA/LCP composite material is characterized in that the antioxidant is Crainen seed.
The PPA/LCP composite material is characterized in that the nucleating agent is one of long carbon chain linear saturated carboxylic acid sodium salt or long carbon chain linear saturated carboxylic acid calcium salt.
In another aspect, the present invention further provides a preparation method of a PPA/LCP composite material, for preparing the PPA/LCP composite material, wherein the preparation method comprises the steps of:
uniformly mixing PPA resin, LCP resin, sericite, a compatible toughening agent, a dispersing agent, an antioxidant and a nucleating agent to obtain a mixture;
and extruding and granulating the mixture and the glass fiber through a double-screw extruder to obtain the PPA/LCP composite material.
Has the advantages that: according to the PPA/LCP composite material prepared by the invention, the LCP resin is added into the PPA resin, so that the viscosity of the PPA resin in the forming process can be effectively reduced, the forming processing performance of the composite material is improved, and in addition, the added glass fiber and sericite can effectively reduce the dielectric constant and dielectric loss of the material while the composite material is reinforced, thereby being beneficial to the application in the field of 5G.
Drawings
FIG. 1 is a schematic flow chart of a preparation method of PPA/LCP composite material of the invention.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are given in the accompanying drawings. This application may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
According to the invention, the prepared PPA/LCP composite material comprises, by weight, 20-70 parts of PPA resin, 10-30 parts of LCP resin, 20-50 parts of glass fiber, 10-30 parts of sericite, 5-10 parts of a compatible toughening agent, 0.5-1 part of a dispersing agent, 0.5-1 part of an antioxidant and 0.5-1 part of a nucleating agent.
It should be noted that the polyphthalamide (PPA) resin is a semi-aromatic polyamide made from terephthalic acid or phthalic acid, and includes semi-crystalline PPA and non-crystalline PPA, wherein the non-crystalline PPA is mainly used in the occasion of requiring barrier property, and the semi-crystalline PPA is mainly used in injection molding.
Further, in the present invention, it is preferable that the LCP resin having a melting temperature of 300-400 ℃ is mixed with the PPA resin, the LCP resin added can neutralize the viscosity of the PPA resin to reduce the viscosity of the composite material, and is advantageous for molding the composite material, and further, the composite material is further added with glass fiber and sericite, wherein the added glass fiber has excellent electrical insulation property, and simultaneously, the LCP resin and the PPA resin can be well reinforced, the added sericite is a silicate mineral having a layered high aspect ratio structure, and a two-dimensional sheet structure of the sericite makes it have a highly oriented sequence in a plastic product, thereby exhibiting a specific plane orientation pattern, and further improving intermolecular acting force, and finally exhibiting an excellent reinforcing effect on the LCP resin and the PPA resin, and the sericite is used as an inorganic material having an electrical constant, not only can reduce the overall dielectric constant of the composite material, but also can play a role in enhancing other physical and chemical properties of the composite material.
In the invention, the adopted glass fibers comprise short glass fibers and long glass fibers, wherein the glass fibers can only play a filling role but cannot play a reinforcing role if being too long, and the glass fibers can influence the dispersibility of the glass fibers and the molding processability of the composite material if being too short although the reinforcing effect is obvious.
Further, as shown in fig. 1, the present invention also provides a method for preparing a PPA/LCP composite material, which comprises the steps of:
s10, uniformly mixing the PPA resin, the LCP resin, the compatible toughening agent, the dispersing agent, the antioxidant and the nucleating agent to obtain a mixture;
s20, extruding and granulating the mixture, glass fiber and sericite through a double-screw extruder to obtain the PPA/LCP composite material.
According to the PPA/LCP composite material, the PPA resin, the LCP resin, the sericite, the compatible toughening agent, the dispersing agent, the antioxidant and the nucleating agent are mixed to form a main material, then the obtained main material is added into a double-screw extruder, and the glass fiber and the sericite are sequentially added into the double-screw extruder, so that the PPA/LCP composite material is obtained. According to the invention, the pre-dispersed main materials are firstly melted into a semi-molten state in the double-screw extruder, and then the glass fibers and the sericite are sequentially added into the double-screw extruder to be melted with the semi-molten main materials, so that the glass fibers and the sericite are subjected to more appropriate shearing action force in the feeding sequence, and the dispersibility of the glass fibers and the sericite in the PPA/LCP composite material can be further improved, thereby the PPA/LCP composite material is better enhanced.
In summary, the LCP resin is added to the PPA resin in the present invention, so that the viscosity of the PPA resin during the molding process can be effectively reduced, the molding processability of the composite material can be improved, and the added glass fiber and sericite can effectively reduce the dielectric constant and dielectric loss of the material while reinforcing the composite material, which is beneficial to the application in the 5G field.
The PPA/LCP composite material and the preparation method thereof according to the present invention are further illustrated by the following specific examples:
example 1
And (2) uniformly mixing 20 parts of PPA resin, 10 parts of LCP resin, 5 parts of compatible toughening agent, 0.5 part of dispersant, 0.5 part of antioxidant and 0.5 part of nucleating agent in a high-speed mixer, wherein the mixing speed is 20-40r/min, and the mixing time is 30min to obtain the main material.
And (3) extruding and granulating: and adding the mixed main materials into a double-screw extruder, then adding 20 parts of glass fiber and 10 parts of sericite, and carrying out particle cutting and drying by adopting a conventional particle cutting process under the conditions that the extrusion temperature is 300-350 ℃ and the extrusion speed is 50-100r/min, wherein the particle length is 4-6mm, thus obtaining the composite material.
Example 2
And (2) uniformly mixing 30 parts of PPA resin, 10 parts of LCP resin, 5 parts of compatible toughening agent, 0.5 part of dispersant, 0.5 part of antioxidant and 0.5 part of nucleating agent in a high-speed mixer, wherein the mixing speed is 20-40r/min, and the mixing time is 30min to obtain the main material.
And (3) extruding and granulating: and adding the mixed main materials into a double-screw extruder, then adding 20 parts of glass fiber and 10 parts of sericite, and carrying out particle cutting and drying by adopting a conventional particle cutting process under the conditions that the extrusion temperature is 300-350 ℃ and the extrusion speed is 50-100r/min, wherein the particle length is 4-6mm, thus obtaining the composite material.
Example 3
And (2) uniformly mixing 50 parts of PPA resin, 10 parts of LCP resin, 5 parts of compatible toughening agent, 0.5 part of dispersant, 0.5 part of antioxidant and 0.5 part of nucleating agent in a high-speed mixer, wherein the mixing speed is 20-40r/min, and the mixing time is 30min to obtain the main material.
And (3) extruding and granulating: and adding the mixed main materials into a double-screw extruder, then adding 20 parts of glass fiber and 10 parts of sericite, and carrying out particle cutting and drying by adopting a conventional particle cutting process under the conditions that the extrusion temperature is 300-350 ℃ and the extrusion speed is controlled at 50-100r/min, wherein the particle length is 4-6mm, so as to obtain the composite material.
Example 4
70 parts of PPA resin, 10 parts of LCP resin, 5 parts of compatible toughening agent, 0.5 part of dispersant, 0.5 part of antioxidant and 0.5 part of nucleating agent are uniformly mixed in a high-speed mixer, wherein the mixing speed is 20-40r/min, and the mixing time is 30min, so as to obtain the main material.
And (3) extruding and granulating: and adding the mixed main materials into a double-screw extruder, then adding 20 parts of glass fiber and 10 parts of sericite, and carrying out particle cutting and drying by adopting a conventional particle cutting process under the conditions that the extrusion temperature is 300-350 ℃ and the extrusion speed is 50-100r/min, wherein the particle length is 4-6mm, thus obtaining the composite material.
Example 5
And (2) uniformly mixing 50 parts of PPA resin, 30 parts of LCP resin, 5 parts of compatible toughening agent, 0.5 part of dispersant, 0.5 part of antioxidant and 0.5 part of nucleating agent in a high-speed mixer, wherein the mixing speed is 20-40r/min, and the mixing time is 30min to obtain the main material.
And (3) extruding and granulating: and adding the mixed main materials into a double-screw extruder, then adding 20 parts of glass fiber and 10 parts of sericite, and carrying out particle cutting and drying by adopting a conventional particle cutting process under the conditions that the extrusion temperature is 300-350 ℃ and the extrusion speed is 50-100r/min, wherein the particle length is 4-6mm, thus obtaining the composite material.
Example 6
And (2) uniformly mixing 50 parts of PPA resin, 30 parts of LCP resin, 5 parts of compatible toughening agent, 0.5 part of dispersant, 0.5 part of antioxidant and 0.5 part of nucleating agent in a high-speed mixer, wherein the mixing speed is 20-40r/min, and the mixing time is 30min to obtain the main material.
And (3) extruding and granulating: and adding the mixed main materials into a double-screw extruder, then adding 50 parts of glass fiber and 10 parts of sericite, and carrying out particle cutting and drying by adopting a conventional particle cutting process under the conditions that the extrusion temperature is 300-350 ℃ and the extrusion speed is 50-100r/min, wherein the particle length is 4-6mm, thus obtaining the composite material.
Example 7
And (2) uniformly mixing 50 parts of PPA resin, 30 parts of LCP resin, 5 parts of compatible toughening agent, 0.5 part of dispersant, 0.5 part of antioxidant and 0.5 part of nucleating agent in a high-speed mixer, wherein the mixing speed is 20-40r/min, and the mixing time is 30min to obtain the main material.
And (3) extruding and granulating: and adding the mixed main materials into a double-screw extruder, then adding 50 parts of glass fiber and 30 parts of sericite, and carrying out particle cutting and drying by adopting a conventional particle cutting process under the conditions that the extrusion temperature is 300-350 ℃ and the extrusion speed is 50-100r/min, wherein the particle length is 4-6mm, thus obtaining the composite material.
Further, the properties of the PPA/LCP composites prepared in examples 1 to 7 were analyzed in the present invention, and the results are shown in the following table:
it should be noted that the comparison group in the table is made by taking PPA resin as an example for comparison, and the samples of examples 1 to 7 are prepared in advance into long strips according to the relevant detection standards for testing, and it can be seen from the data in the table that the mechanical properties of the PPA/LCP composite material prepared by the present invention are better than those of the sample of pure PPA resin after molding, and the PPA/LCP composite material can be adapted to large-scale industrial production.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. The PPA/LCP composite material is characterized by comprising the following components in parts by weight:
2. the PPA/LCP composite of claim 1, wherein the LCP resin has a melting temperature of 300-400 ℃.
3. The PPA/LCP composite of claim 1 wherein the compatible toughening agent is one or more of an MBS resin, a styrene elastomer grafted maleic anhydride copolymer, or a thermoplastic polyester elastomer.
4. The PPA/LCP composite of claim 1, wherein the glass fibers comprise short glass fibers and long glass fibers.
5. The PPA/LCP composite of claim 1, wherein the short glass fibers have a diameter of 5-10um and an aspect ratio of 30: 1.
6. The PPA/LCP composite of claim 1, wherein the dispersant is a hyperbranched polymer.
7. The PPA/LCP composite of claim 1, wherein the antioxidant is clarinet seed.
8. The PPA/LCP composite of claim 1, wherein the nucleating agent is one of a long carbon chain linear saturated carboxylic acid sodium salt or a long carbon chain linear saturated carboxylic acid calcium salt.
9. A method of preparing a PPA/LCP composite material for use in preparing a PPA/LCP composite material as claimed in any one of claims 1 to 8, comprising the steps of:
uniformly mixing PPA resin, LCP resin, a compatible toughening agent, a dispersing agent, an antioxidant and a nucleating agent to obtain a mixture;
and extruding and granulating the mixture, glass fiber and sericite through a double-screw extruder to obtain the PPA/LCP composite material.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0395414A1 (en) * | 1989-04-27 | 1990-10-31 | Amoco Corporation | Crystalline polyphtalamide composition having improved heat resistance properties |
| US5098940A (en) * | 1989-04-27 | 1992-03-24 | Amoco Corporation | Crystalline polyphthalamide composition having improved properties |
| CN101831171A (en) * | 2010-04-21 | 2010-09-15 | 深圳市科聚新材料有限公司 | Flame retardant reinforced polyphthalamide composite material and preparation method thereof |
| CN110982297A (en) * | 2019-12-17 | 2020-04-10 | 东莞市德发塑胶科技有限公司 | 5G low dielectric strength LCP composite material and preparation method thereof |
-
2021
- 2021-06-25 CN CN202110715953.6A patent/CN113337113A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0395414A1 (en) * | 1989-04-27 | 1990-10-31 | Amoco Corporation | Crystalline polyphtalamide composition having improved heat resistance properties |
| US5098940A (en) * | 1989-04-27 | 1992-03-24 | Amoco Corporation | Crystalline polyphthalamide composition having improved properties |
| CN101831171A (en) * | 2010-04-21 | 2010-09-15 | 深圳市科聚新材料有限公司 | Flame retardant reinforced polyphthalamide composite material and preparation method thereof |
| CN110982297A (en) * | 2019-12-17 | 2020-04-10 | 东莞市德发塑胶科技有限公司 | 5G low dielectric strength LCP composite material and preparation method thereof |
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Application publication date: 20210903 |