CN102010557B - Single-polymer composite material of polytetrafluoroethylene - Google Patents
Single-polymer composite material of polytetrafluoroethylene Download PDFInfo
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- CN102010557B CN102010557B CN 201010541401 CN201010541401A CN102010557B CN 102010557 B CN102010557 B CN 102010557B CN 201010541401 CN201010541401 CN 201010541401 CN 201010541401 A CN201010541401 A CN 201010541401A CN 102010557 B CN102010557 B CN 102010557B
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- polytetrafluoroethylene
- matrix
- tetrafluoroethylene
- composite material
- polymer composite
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- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
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Abstract
The invention relates to a single-polymer composite material of polytetrafluoroethylene, belonging to the technical field of composite materials. The single-polymer composite material of the polytetrafluoroethylene is prepared from a matrix and an enhancement phase by cold molding and sintering, wherein the matrix is the polytetrafluoroethylene which can be in the state of powder, films and sheets, and the enhancement phase is polytetrafluoroethylene fiber; and the single-polymer composite material of polytetrafluoroethylene comprises the two materials in percentage by weight: 80-95% of matrix and 5-20% of enhancement phase. By using the single-polymer composite material of the polytetrafluoroethylene provided by the invention, the satisfactory interface combination of the polytetrafluoroethylene matrix and the fiber phase can be realized, and the mechanical properties are higher than those of pure polytetrafluoroethylene material prepared under the same conditions. Since the matrix and the enhancement phase are the same material, the single-polymer composite material of the polytetrafluoroethylene can be recycled easily.
Description
Technical field
The present invention relates to a kind of tetrafluoroethylene list polymer composites, belong to technical field of composite materials.
Background technology
Tetrafluoroethylene trade name ZX 21 is to be the high crystallinity polymer that monomer polymerization forms with the tetrafluoroethylene.Density is 2.2g/cm
3, water-intake rate is less than 0.01%.Fusion does not take place being higher than under the temperature of fusing point in polytetrafluoroethylmaterial material.The tetrafluoroethylene molecule has helical conformation, is skeleton with the carbon atom, is covered by fluorine atom on every side.Because the bond energy of C-F key is very big, and molecular structure is symmetrical fully again, and this makes it have fabulous heat-resisting, winter hardiness.Tetrafluoroethylene has fabulous chemical resistance, is not dissolve or swell in any known solvent, even at high temperature chloroazotic acid can not work to it.Excellent electrical insulating property, outstanding not viscosity, nearly all viscous substance all can not stick to its surface.Low-permeability, high pressure resistant and anti-high and low-temp performance, nontoxic, pollution-free.A series of excellent comprehensive performances such as unique self lubricity and low-friction coefficient.It is called as " plastics king ", can be made into polyfluortetraethylene pipe, rod, band, plate, film etc.Generally be applied to the higher corrosion resistant pipeline of performance requriements, container, pump, valve and system radar, high frequency Communication Equipment, radio component parts etc.Though the tetrafluoroethylene excellent performance, because its surface energy is low, wettability is poor, can not be well by bonding, and bad with other substances compatible property, thus limited its application in some special dimensions.Creep resistance is poor as existing when the sealing material, easy-cold flow, rebound resilience is poor, supporting capacity is low, linear expansivity is big, in distinct disadvantage such as high temperature (260 ℃) are prone to down soften; Therefore industry is upward general in this case adopts other materials compound with it; To strengthen its mechanical property; Yet the compound tetrafluoroethylene of other materials is difficult for recycling after use, cause waste.
Summary of the invention
The objective of the invention is to the intensity of polytetrafluoroethylmaterial material own lowly, the ptfe composite interface is insecure, and the heterogeneous problem such as recycling that is difficult for proposes a kind of tetrafluoroethylene list polymer composites.The present invention is that the polytetrafluoroethylmaterial material with different shape is single polymer composites that matrix and wild phase are prepared, and intensity that can the reinforced TFE material can obtain to have good chemical key bonded interface again.
The fused characteristics being higher than under the temperature of fusing point, do not take place according to polytetrafluoroethylmaterial material in the present invention, take elder generation with poly tetrafluoro ethylene matrix and fiber compression molding at normal temperatures mutually, and the agglomerating process method is prepared tetrafluoroethylene list polymer composites again.
The objective of the invention is to realize through following technical scheme.
Tetrafluoroethylene list polymer composites of the present invention adopts cold forming agglomerating method to be prepared from matrix and wild phase;
The material of wherein said matrix is a tetrafluoroethylene, and state can be powder, film and sheet material, and the wild phase material is a polytetrafluoroethylene fiber;
The per-cent that the quality of matrix and wild phase accounts for tetrafluoroethylene list polymer composites total mass respectively is:
The quality of materials per-cent of matrix is 80%～95%;
The mass percent of wild phase is 5%～20%.
Beneficial effect
The present invention makes the mechanical property of material be superior to pure polytetrafluoroethylmaterial material owing in matrix material, added fiber as wild phase.Because matrix of the present invention and wild phase are same material, in the preparation process, produced firm interface between matrix and wild phase and combined, compare with the material after other materials is compound with tetrafluoroethylene, it is bonding to form good interface more easily, easy recycling.
Description of drawings
The electron scanning micrograph at the interface (10 of fiber and matrix in Fig. 1 tetrafluoroethylene list polymer composites
4Doubly).
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Embodiment 1
The process for preparing tetrafluoroethylene list polymer composites with the one-step mould sintering below is that instance describes.
With the 1g median size is that polytetrafluorethylepowder powder and the 19g diameter of 25 μ m is 30 μ m, and length is that the polytetrafluoroethylene fiber of 10mm is put into FW100 type high speed Universalpulverizer, and 24000r/min mixed 1 minute down.Under the normal temperature polytetrafluorethylepowder powder that mixes and fiber batch mixing are added in the mould, pressure is mold pressing 30 minutes under the 15MPa, the demoulding.With the polytetrafluorethylepowder powder of compression molding and fiber batch mixing sintering 60 minutes under 380 ℃ high temperature, furnace cooling obtains tetrafluoroethylene list polymer composites.
According to stretching and bending property that the method for GB1040-2006 and GB8812-2007 is tested the single polymer composites of PTFE, tensile strength, modulus and flexural strength modulus are respectively 18.90,342.44; 16.52; 280.77MPa the pure PTFE tensile strength of material, modulus and the flexural strength modulus that all are higher than preparation under the same terms (are respectively 15.56,349.75; 13.65,217.90MPa).
Tetrafluoroethylene list polymer composites to preparing carries out test analysis.As shown in Figure 1, be coated on fiber surface through scanning electronic microscope observation preferably to matrix in tetrafluoroethylene list polymer composites, formed interface structure preferably, the interface performance of matrix material is good.
Embodiment 2
For guaranteeing compound is that the polytetrafluoroethylene fiber of 40 μ m is compiled into cloth with the 10g diameter at first evenly, again itself and 40g thickness are range upon range of the putting of polytetrafluoroethylene diaphragm of 1mm after, be mold pressing 60 minutes under the 15MPa at pressure.With the polytetrafluoroethylene diaphragm of compression molding and with cloth batch mixing sintering 60 minutes under 380 ℃ high temperature, furnace cooling obtains laminating technology and prepares tetrafluoroethylene list polymer composites.The tensile strength of the tetrafluoroethylene list polymer composites of laminating technology preparation can reach 20MPa.
Claims (1)
1. tetrafluoroethylene list polymer composites is characterized in that: adopt cold forming agglomerating method to be prepared from matrix and wild phase;
The material of wherein said matrix is a tetrafluoroethylene, and state is powder, film and sheet material, and the wild phase material is a polytetrafluoroethylene fiber;
The per-cent that the quality of matrix and wild phase accounts for tetrafluoroethylene list polymer composites total mass respectively is:
The quality of materials per-cent of matrix is 80%～95%;
The mass percent of wild phase is 5%～20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010541401 CN102010557B (en) | 2010-11-12 | 2010-11-12 | Single-polymer composite material of polytetrafluoroethylene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010541401 CN102010557B (en) | 2010-11-12 | 2010-11-12 | Single-polymer composite material of polytetrafluoroethylene |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102010557A CN102010557A (en) | 2011-04-13 |
| CN102010557B true CN102010557B (en) | 2012-12-26 |
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ID=43840900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010541401 Expired - Fee Related CN102010557B (en) | 2010-11-12 | 2010-11-12 | Single-polymer composite material of polytetrafluoroethylene |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102010557B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102529016B (en) * | 2012-02-20 | 2015-09-09 | 北京理工大学 | A kind of single polymer composite product injection molding forming method and equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0352972A2 (en) * | 1988-07-29 | 1990-01-31 | BAXTER INTERNATIONAL INC. (a Delaware corporation) | Fiber-reinforced expanded fluoroplastic vascular grafts |
-
2010
- 2010-11-12 CN CN 201010541401 patent/CN102010557B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0352972A2 (en) * | 1988-07-29 | 1990-01-31 | BAXTER INTERNATIONAL INC. (a Delaware corporation) | Fiber-reinforced expanded fluoroplastic vascular grafts |
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|---|---|
| CN102010557A (en) | 2011-04-13 |
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