CN117209971A - PBT alloy material and preparation method and application thereof - Google Patents
PBT alloy material and preparation method and application thereof Download PDFInfo
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- CN117209971A CN117209971A CN202311136198.1A CN202311136198A CN117209971A CN 117209971 A CN117209971 A CN 117209971A CN 202311136198 A CN202311136198 A CN 202311136198A CN 117209971 A CN117209971 A CN 117209971A
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- 239000000956 alloy Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 46
- 238000001746 injection moulding Methods 0.000 claims abstract description 20
- 239000003607 modifier Substances 0.000 claims abstract description 13
- 239000003365 glass fiber Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims abstract description 8
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 5
- 239000011347 resin Substances 0.000 claims abstract description 5
- 229920005989 resin Polymers 0.000 claims abstract description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000003963 antioxidant agent Substances 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 2
- 239000006096 absorbing agent Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 abstract description 17
- 229910052751 metal Inorganic materials 0.000 abstract description 17
- 239000000758 substrate Substances 0.000 abstract description 3
- 238000003756 stirring Methods 0.000 abstract 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 24
- 230000000052 comparative effect Effects 0.000 description 10
- 229920003023 plastic Polymers 0.000 description 8
- 239000004033 plastic Substances 0.000 description 8
- 239000002994 raw material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000007769 metal material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- JXLYSJRDGCGARV-WWYNWVTFSA-N Vinblastine Natural products O=C(O[C@H]1[C@](O)(C(=O)OC)[C@@H]2N(C)c3c(cc(c(OC)c3)[C@]3(C(=O)OC)c4[nH]c5c(c4CCN4C[C@](O)(CC)C[C@H](C3)C4)cccc5)[C@@]32[C@H]2[C@@]1(CC)C=CCN2CC3)C JXLYSJRDGCGARV-WWYNWVTFSA-N 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- AGXUVMPSUKZYDT-UHFFFAOYSA-L barium(2+);octadecanoate Chemical compound [Ba+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O AGXUVMPSUKZYDT-UHFFFAOYSA-L 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- -1 polybutylene terephthalate Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 229960003048 vinblastine Drugs 0.000 description 1
- JXLYSJRDGCGARV-XQKSVPLYSA-N vincaleukoblastine Chemical compound C([C@@H](C[C@]1(C(=O)OC)C=2C(=CC3=C([C@]45[C@H]([C@@]([C@H](OC(C)=O)[C@]6(CC)C=CCN([C@H]56)CC4)(O)C(=O)OC)N3C)C=2)OC)C[C@@](C2)(O)CC)N2CCC2=C1NC1=CC=CC=C21 JXLYSJRDGCGARV-XQKSVPLYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to a PBT alloy material, a preparation method and application thereof, wherein the PBT alloy material comprises the following components in parts by weight: 60-85 parts of PBT resin, 10-20 parts of ABS resin, 5-10 parts of chopped glass fiber, 5-10 parts of surface modifier and 0.1-1 part of other auxiliary agents. The preparation method comprises the steps of uniformly stirring all the components in a mixing barrel, and extruding and granulating by a double-screw extruder to obtain the PBT alloy material for the nano injection molding process. Compared with the prior art, the material disclosed by the invention has strong binding force with a metal substrate, is not easy to crack, can be applied to a nano injection molding process, can be widely applied to products such as a rear shell of a smart phone, and has a wide application prospect, and meanwhile, the cost is low.
Description
Technical Field
The invention relates to the technical field of polymer blending and polymer forming processing, in particular to a PBT alloy material and a preparation method and application thereof.
Background
The PBT resin is polybutylene terephthalate, has excellent high temperature resistance and chemical corrosion resistance, and is commonly used for parts such as automobile inner and outer decorations, medical instrument shells and the like. In mobile phone products, because the metal housing shields the signal transmission, a plastic member is generally required as a signal transmission port. The common plastic can be combined with the shell through the modes of insert, bonding, nano injection molding and the like to form a mobile phone rear shell product. Among the processes, the nano injection molding process utilizes the riveting effect of nano holes, so that the binding force of the plastic material and the metal material is strongest, and the binding effect is best, and the direction is the main direction of subsequent application and development. However, in nano injection molding, the plastic material and the metal base material are required to have good compatibility, and can penetrate into the nano holes of the metal piece to form a riveting effect. The common plastic materials have poor compatibility because of lower polarity and larger polarity difference with the metal base material. When the compatibility is poor, the plastic material cannot well enter the nano holes, and the binding force of the plastic material and the nano holes is greatly reduced.
Disclosure of Invention
The invention aims to provide a PBT alloy material, a preparation method and application thereof, which can be applied to a nano injection molding process.
The aim of the invention can be achieved by the following technical scheme: the PBT alloy material comprises the following components in parts by weight:
preferably, the PBT alloy material comprises the following components in parts by weight:
preferably, the PBT resin has a normal temperature intrinsic viscosity eta of 0.8 to 1.2.
Preferably, the ABS resin has a relative molecular weight of 80000 to 150000.
Preferably, the ABS resin contains 5-30wt% of rubber, 10-30wt% of acrylonitrile and 40-70wt% of styrene.
Preferably, the length of the chopped glass fibers is 5-50 mm.
Preferably, the diameter of the chopped glass fibers is 10-15 nm.
Preferably, the surface modifier is AS-GMA, wherein the GMA content is not less than 0.5wt%. When the GMA content is too low, the polarity of the material is poor, and the compatibility of the material and the metal base material is poor.
Preferably, the surface modifier is AS-GMA, wherein the GMA content is not more than 2wt%. When the GMA content is too high, the material will crosslink and the impact strength is low.
Preferably, the surface modifier is AS-GMA, wherein the GMA content is 0.5-2wt%.
In AS-GMA, AS represents the A and S components in the ABS, and may also be written AS SAN.
Preferably, the other auxiliary agents comprise antioxidants, ultraviolet absorbers and lubricants.
The preparation method of the PBT alloy material specifically comprises the following steps:
(a) Preparing materials according to a formula, premixing all the components in a mixing barrel, and uniformly mixing for later use;
(b) And (c) blending, melting, extruding and granulating the mixture obtained in the step (a) through a double-screw extruder to obtain the PBT alloy material.
Preferably, the barrel temperature of the twin-screw extruder is 160-250 ℃, the screw rotation speed is 200-600rpm, and the pressure is 1.5-2.5MPa.
The application of the PBT alloy material is that the PBT alloy material is used for nano injection molding.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the linear expansion coefficient of the whole material is reduced by adding the chopped glass fibers, so that the shrinkage rate is close to that of the material when the material is combined with the metal base material, and the cracking of the material is avoided. Meanwhile, the surface modifier is added, so that the polarity of the material is improved, and the compatibility and the binding force of the material and the metal base material are improved. Because the polarity of the surface modifier is greatly different from that of the PBT material, the second component ABS needs to be added as a mixed base material, so that the compatibility of the surface modifier and the base material is improved.
2. The chopped glass fiber has higher length-diameter ratio, has good effect on improving the post-shrinkage of the material, and has good compatibility with a base material. The chopped glass fiber has good capability of preventing material shrinkage, can enable material shrinkage after material shrinkage to be close to that of metal material, and improves the binding force of the material and the metal material.
3. After injection molding is finished, the shrinkage of the material is small, and the size difference between the material and metal is reduced.
4. The material disclosed by the invention has strong binding force with a metal substrate, is not easy to crack, can be applied to a nano injection molding process, can be widely applied to products such as a rear shell of a smart phone, and has low cost and wide application prospect.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
The following examples and comparative examples were prepared from the following raw materials: the viscosity of the PBT resin is 1.0, and the chemical industry of the vinblastine is realized; ABS resin is produced by adopting ABS8391 and high-bridge petrochemical production; the length of the chopped glass fiber is 5-50 mm, the diameter is 13nm, and the glass fiber is a boulder group; SAG001 is adopted as the surface modifier, the content of GMA is 1wt%, and the daily fine chemical production is realized; the other auxiliary agents comprise an antioxidant B900 (steam refining), an ultraviolet absorber Tinuvins UVP (Ciba) and a lubricant barium stearate, and the weight ratio of the auxiliary agents is 1:1:1.
The PBT alloy materials prepared in examples 1-4 and comparative examples 1-3 were dried at 80 ℃ for 5 hours, and then subjected to injection molding test bars according to ASTM standards to detect physical properties; the metal binding force test method is as follows: 1) Pretreating the metal part (aluminum insert) by a chemical etching process to produce nano-sized and micro-sized pores on the metal surface; 2) Injection molding plastic onto the pretreated aluminum insert within an effective treatment time frame; 3) On a standard tensile tester, the binding force is measured by recording the force at which the molded part is pulled to the breaking point;
4) The bonding strength was calculated in MPa by dividing the bonding force by the bonding area. Specific test criteria and conditions are shown in table 1.
TABLE 1
Example 1
The embodiment provides a PBT alloy material for a nano injection molding process and a preparation method thereof, and the preparation method comprises the following specific steps:
(1) Weighing the components according to the weight ratio shown in the table 2;
(2) Preparing materials according to a formula, premixing all the components in a mixing barrel, and uniformly mixing for later use;
(3) And (3) blending, melting, extruding and granulating the mixture obtained in the step (2) through a double-screw extruder to obtain the product.
Feeding the mixed mixture from a main feed of a double-screw extruder, and performing melt extrusion, cooling, drying and granulating to obtain a sample; wherein, the twin-screw extruder is a twin-screw extruder rotating in the same direction, and the length-diameter ratio of the screw is 40:1, a screw machine barrel is provided with a vacuum pumping device and a temperature control device; the temperature of the feeding section of the twin-screw extruder was 160 ℃, the temperature of the plasticizing section was 220 ℃, the temperature of the homogenizing section was 250 ℃, the screw rotation speed was 400rpm, and the pressure was 2.5MPa.
Example 2
The embodiment provides a PBT alloy material for a nano injection molding process and a preparation method thereof, wherein the weight ratio of raw materials is shown in Table 2, and the preparation method is the same as that of embodiment 1.
Example 3
The embodiment provides a PBT alloy material for a nano injection molding process and a preparation method thereof, wherein the weight ratio of raw materials is shown in Table 2, and the preparation method is the same as that of embodiment 1.
Example 4
The embodiment provides a PBT alloy material for a nano injection molding process and a preparation method thereof, wherein the weight ratio of raw materials is shown in Table 2, and the preparation method is the same as that of embodiment 1.
Comparative example 1
The comparative example provides a PBT alloy material for nano injection molding process and a preparation method thereof, wherein the weight ratio of raw materials is shown in Table 2, and the preparation method is the same as that of example 1.
Comparative example 2
The comparative example provides a PBT alloy material for nano injection molding process and a preparation method thereof, wherein the weight ratio of raw materials is shown in Table 2, and the preparation method is the same as that of example 1.
Comparative example 3
The comparative example provides a PBT alloy material for nano injection molding process and a preparation method thereof, wherein the weight ratio of raw materials is shown in Table 2, and the preparation method is the same as that of example 1.
TABLE 2
The physical properties and metal bonding force test results of the PBT alloy materials of examples 1 to 4 and comparative examples 1 to 3 are shown in Table 3 below.
TABLE 3 Table 3
As shown by the test results of examples 1-4 and comparative examples 1-3 in Table 3, the linear expansion coefficient of the material is reduced by adding chopped glass fibers, so that the shrinkage rate is close when the material is combined with a metal substrate, and the cracking of the material is avoided. Meanwhile, the surface modifier is added, so that the polarity of the material is improved, and the compatibility and the binding force of the material and the metal base material are improved. Because the polarity of the surface modifier is greatly different from that of the PBT material, the second component ABS needs to be added as a mixed base material, so that the compatibility of the surface modifier and the base material is improved. The material has strong binding force with the metal base material, is not easy to crack, and can be applied to the nano injection molding process.
There are many ways in which the invention may be practiced, and what has been described above is merely a preferred embodiment of the invention. It should be noted that the above examples are only for illustrating the present invention and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that modifications may be made without departing from the principles of the invention, and such modifications are intended to be within the scope of the invention.
Claims (10)
1. The PBT alloy material is characterized by comprising the following components in parts by weight:
2. the PBT alloy material according to claim 1, wherein the PBT resin has a normal temperature intrinsic viscosity η of 0.8 to 1.2.
3. The PBT alloy material according to claim 1, wherein the ABS resin has a relative molecular weight of 80000 to 150000, wherein the rubber content is 5 to 30wt%, the acrylonitrile content is 10 to 30wt%, and the styrene content is 40 to 70wt%.
4. The PBT alloy material according to claim 1, wherein the length of the chopped glass fibers is 5 to 50mm.
5. The PBT alloy material according to claim 1, wherein the surface modifier is AS-GMA, wherein the GMA content is not less than 0.5wt%.
6. The PBT alloy material of claim 1, wherein the surface modifier is AS-GMA, wherein the GMA content is not more than 2wt%.
7. The PBT alloy material according to claim 1, wherein the other auxiliary agents include antioxidants, ultraviolet absorbers, lubricants.
8. A method for preparing the PBT alloy material according to any one of claims 1 to 7, which is characterized by comprising the following steps:
(a) Preparing materials according to a formula, premixing all the components, and uniformly mixing for later use;
(b) And (c) blending, melting, extruding and granulating the mixture obtained in the step (a) through a double-screw extruder to obtain the PBT alloy material.
9. The method for producing a PBT alloy material according to claim 8, wherein the twin-screw extruder has a barrel temperature of 160 to 250 ℃, a screw rotation speed of 200 to 600rpm, and a pressure of 1.5 to 2.5MPa.
10. Use of the PBT alloy material according to any of claims 1 to 7, characterized in that the PBT alloy material is used for nano injection molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311136198.1A CN117209971A (en) | 2023-09-05 | 2023-09-05 | PBT alloy material and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311136198.1A CN117209971A (en) | 2023-09-05 | 2023-09-05 | PBT alloy material and preparation method and application thereof |
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| Publication Number | Publication Date |
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| CN117209971A true CN117209971A (en) | 2023-12-12 |
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| CN202311136198.1A Pending CN117209971A (en) | 2023-09-05 | 2023-09-05 | PBT alloy material and preparation method and application thereof |
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| Country | Link |
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| CN (1) | CN117209971A (en) |
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- 2023-09-05 CN CN202311136198.1A patent/CN117209971A/en active Pending
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