Product Features

polyether ether ketone has the heat resistance and chemical stability of thermosetting plastics and the molding processability of thermoplastics. Polyetheretherketone also has excellent heat resistance. Its thermal deformation temperature is 160 ℃, and when it is reinforced with 20% ~ 30% glass fiber, the thermal deformation temperature can be increased to 280~300 ℃. The thermal stability of PEEK is good, 420 ℃ in air. In the case of 2h, the weight loss is only 2%, 2.5 at 500 degrees C, and the significant thermal weight loss is produced at 500 degrees C. The long-term use temperature of polyether ether ketone is about 200 ℃, at this temperature, it can still maintain a high tensile strength and bending modulus, it is also a very strong material, has excellent long-term creep resistance and fatigue resistance.

physical and chemical properties

The electrical insulation performance of PEEK is very excellent, and the volume resistivity is about 1015~1016 Ω · cm. It still has a small dielectric constant and dielectric loss in the high frequency range. For example, at 104Hz, it has a dielectric constant of only 3.2 and a dielectric loss of only 0.02 in the chamber.

The chemical stability of polyether ether ketone is also very good. Except for concentrated sulfuric acid, it is very stable to almost any chemical reagent. Even at higher temperatures, it can still maintain good chemical stability. In addition, it has excellent resistance to hot water and steam. It can be used for a long time in the steam of 200~250 ℃.

polyether ether ketone has good flame retardancy, it is difficult to burn in the usual environment, even if it is burned, the amount of smoke and the release of harmful gases is very low, even lower than that of low smoke polymers such as polytetrafluoroethylene. In addition. It also has excellent radiation resistance. Its resistance to α-rays, β-rays and γ-rays is the best among polymer materials at present. The electric wire product coated with it is resistant to gamma rays of 1.1 × 107Gy.

PEEK has good melt fluidity and thermal stability above the melting point. Therefore, it has the typical molding processing performance of thermoplastics, so it can be used for injection molding, extrusion, blow molding, lamination and other molding methods, as well as spinning and film making. Although the melt processing temperature range of polyether ether ketone is 360-400°C, it still has a wide processing temperature range due to its thermal decomposition temperature above 520°C.

Polyetheretherketone (PEEK) applications

the long-term use temperature of polyether ether ketone is as high as 250 ℃, it was once called super heat-resistant special engineering plastics. In addition, it also has excellent comprehensive properties such as high strength, corrosion resistance, radiation resistance, excellent electrical properties, flame retardant, and suitable for various processing technologies. Therefore, PEEK has been widely used in high-tech fields such as national defense, aerospace, electronic information, energy, automobiles, home appliances, and medical and health.

PEEK resin was first developed and commercialized by ICI Company in the early 1980 s. After a period of development induction, Victrex Company began to operate independently in 1993, and its output increased at an annual rate of 15%. By the end of the 20th century, PEEK resin was still exclusively produced and supplied by Victrex companies, and its production scale had reached 2,000 t per year. The main consumer markets were Europe and the United States, each accounting for 45%, and Asia, dominated by Japan, accounting for 10%.

PEEK's main application areas

From the application of the distribution, the automotive and other (including aviation) transport market accounted for about PEEK resin consumption of 40%, semiconductor manufacturing equipment accounted for 25%, compressor valves and other general mechanical parts products accounted for 25%, medical equipment and analytical instruments and other markets accounted for 10%.

1, automobile and other transport machinery field

In recent years, the growth of PEEK resin in the European market, especially in the auto parts market, the most rapid growth, especially around the engine parts, variable speed transmission parts, steering parts, etc. have selected PEEK plastic instead of some traditional high-priced metals as manufacturing materials. In the future, as the automotive industry adapts to the requirements of miniaturization, lightweight and cost reduction, the demand for PEEK resins will continue to grow. Some data show that 44 parts of a European model use PEEK plastic instead of traditional metal products.

2. IT manufacturing field

semiconductor manufacturing and electronic and electrical industries are expected to become another growth point for PEEK resin applications. In the semiconductor industry, in order to achieve high functionality and low cost, the size of the silicon wafer is larger and the manufacturing technology is more advanced. Low dust, low gas emission, low ion dissolution and low water absorption are the special requirements for various equipment materials in the semiconductor manufacturing process, which will be the place where PEEK resin will show its skills.

3, office machinery parts field

For the copier's separation claw, special heat-resistant bearings, chains, gears, etc., with PEEK resin instead of metal as their material, can make the parts lightweight, fatigue resistance, and can do no oil lubrication.

4. Wire coating field

PEEK coating has good flame retardancy, without any flame retardant, its flame retardant level can reach UL94 V-0 level. PEEK resin also has the advantages of stripping resistance, radiation resistance (109 rad), etc., so special wires used in military and nuclear energy and other related fields have been widely used in the resin to make coatings. Due to these unique properties of PEEK resin, it is expected to replace some general-purpose fluororesins in the future.

5, plate, bar and other fields

PEEK in some special areas of application process, often encounter the number of small, variety of phenomenon, then with rods, plates and other profiles for mechanical processing manufacturing is very favorable.

6. Fiber field

PEEK fiber (including monofilament) has been widely used in composite materials, industrial filter cloth, industrial brush and other products. In the field of composite materials, the charm of PEEK fiber is its thermoplastic and high temperature resistance. In addition to the heat resistance of industrial filter cloth and industrial brush, its charm lies in its chemical resistance and abrasion resistance.

7, Medical Analytical Devices

Because PEEK can withstand repeated high pressure sterilization, it can be used in the manufacture of endoscopic parts, dental detergency, etc. in medical equipment. In addition, due to the high strength and low dissolution of PEEK, it has been used in liquid chromatography columns, tubes, accessories, etc. for instrumental analysis. Moreover, due to the good compatibility of PEEK with the human body, it has successfully replaced the traditional titanium metal as an artificial bone material in recent years.

PREPARATION

Polyetheretherketone tree synthesis process route has two categories.

The first type is the polycondensation reaction of difluorobenzophenone and hydroquinone in the presence of anhydrous sodium carbonate with diphenyl alum as solvent, I .e., aprotic polar solvent, to obtain high molecular weight polyether ether ketone. Its advantage is that the side reactions such as branching and crosslinking of the polymer are easy to control, but the reaction conditions are harsh, the synthesis process is complex, the monomer is expensive and the cost is high, this is also a major reason for the high price and restricting its application.

The second type of process is made by a low-temperature reaction using diphenyl ether and isophthaloyl chloride as raw materials. Its advantages are mild conditions and convenient source of raw materials, but there are side reactions such as polymer branching and crosslinking. Therefore, for the use of electrophilic route synthesis, how to effectively control the polymer chain branching and crosslinking and other side reactions, to obtain high molecular weight polymers, the choice of reaction solvent is particularly important.

Use

New engineering plastics, excellent heat resistance, used in the manufacture of wires, cable insulation materials, aircraft structural materials, aircraft parts, etc