PEEK Polyether Ether Ketone Plastic Material Properties and Uses

PEEK plastic materials:

PEEK plastic raw material refers to a linear polymer composed of aryl, ketone and ether bonds in the main chain of macromolecules. It is the only polyaryletherketone variety that can be produced in large quantities at present. Its English name is polyetherether ketone, or PEEK for short,ZhenghaoPEEK has the heat resistance, chemical stability and molding processability of thermosetting plastics. Polyetheretherketone also has excellent heat resistance. The thermal deformation temperature is 160 ℃. When reinforced with 20% ~ 30% glass fiber, the thermal deformation temperature can be increased to 280~300 ℃. Polyetheretherketone has good thermal stability and is 420 ℃ in air. Weightlessness was only 2% at 2h, 2.5% at 500 ℃ and significant thermal weightlessness at 500 ℃. The long-term use temperature of polyether ether ketone is about 200 ℃. At this temperature, it can still maintain high tensile strength and bending modulus. It is also a very strong material with excellent long-term creep resistance and fatigue resistance.
PEEK has excellent electrical insulation performance, and its volume resistivity is about 10~10 Ω · cm. It still has a small dielectric constant and dielectric loss in the high frequency range. For example, at 10Hz, its dielectric constant is only 3.2 and its dielectric loss is only 0.02.
The chemical stability of PEEK is also very good. Except for concentrated sulfuric acid, it is very stable for almost any chemical reagent, and it can still maintain good chemical stability even at higher temperatures. In addition, it also has excellent heat-resistant water and steam resistance. It can be used for a long time in steam at 200~250 ℃.
PEEK has good flame retardancy and is difficult to burn under normal environment. Even if it is burned, the amount of smoke and harmful gas release is very low, even lower than that of polytetrafluoroethylene and other low-smoking polymers. In addition. It also has excellent radiation resistance. Its resistance to alpha rays, beta rays, & gamma; rays is the best among polymer materials at present. The wire products covered with it can withstand 1.1 × 10Gy & gamma; rays.
PEEK has good melting fluidity and thermal stability above the melting point. Therefore, it has the typical molding processing performance of thermoplastics, so it can be used in injection molding, extrusion, blow molding, lamination and other molding methods, as well as spinning and film making. Although the melting processing temperature range of polyether ether ketone is 360~400 ℃, its thermal decomposition temperature is above 520 ℃, so it still has a wide processing temperature range.
AlthoughPEEK's development history is only a short period of more than 20 years, but due to its outstanding heat resistance, chemical resistance, radiation resistance, high strength and easy processing, it has been widely used in the nuclear industry, chemical industry, electronics and electrical appliances, mechanical instruments, automobile industry and aerospace fields. Especially as a thermoplastic resin with excellent heat resistance, it can be used as a matrix material for high-performance composite materials.

PEEK plastic raw material characteristics:

has radiation resistance, stable insulation, hydrolysis resistance, compression resistance and corrosion resistance. The mechanical parts made of its composite materials have self-lubricating effect.
. Temperature resistance, good thermal stability, ultra-high heat resistance (better than PPS), HDT above 315 degrees Celsius, UL continuous use temperature of 260 degrees Celsius.
1: Mechanical Properties PEEK is a plastic that has both toughness and rigidity and is balanced. In particular, its excellent fatigue resistance to alternating stress is the most outstanding of all plastics, comparable to alloy materials.
2: Self-lubricating PEEK has outstanding sliding characteristics among all plastics and is suitable for applications requiring strict requirements of low friction coefficient and wear resistance. In particular, PEEK, which is mixed and modified by carbon fiber and graphite in a certain proportion, has better self-lubricating performance.
3: Chemical Resistance (Corrosion Resistance) PEEK has excellent chemical resistance. Among the usual chemicals, only concentrated sulfuric acid can dissolve or destroy it, and its corrosion resistance is similar to that of nickel steel.
4: Flame retardant PEEK is a very stable polymer. For samples with a thickness of 1.45mm, the highest flame retardant standard can be reached without any flame retardant.
5: Peeling Resistance PEEK has good peeling resistance, so it can be made into thin coated or electromagnetic wires and can be used under harsh conditions.
6: Fatigue Resistance PEEK has the best fatigue resistance among all resins.
7: Radiation resistance and high radiation resistance are very strong, surpassing polystyrene with the best radiation resistance among general resins. Can be made into & gamma; When the irradiation dose reaches 1100Mrad, it can still maintain good insulation capability and high performance.
8: Hydrolysis resistance PEEK and its composite materials are not affected by the chemistry of water and high-pressure water vapor. Products made of this material can still maintain excellent characteristics after continuous use in high-temperature and high-pressure water.

PEEK (polyetheretherketone) plastic raw material is aromatic crystalline thermoplastic polymer material, its melting point is 334 ℃, with high mechanical strength, high temperature resistance, impact resistance, flame retardant, acid and alkali resistance, hydrolysis resistance, wear resistance, fatigue resistance, radiation resistance and good electrical properties.
high temperature resistance
PEEK resin has high melting point (358 ℃) and glass transition temperature (1 43 ℃), continuous use temperature is 260 ℃, and its load thermal modification temperature 30% GF or CF reinforced grade is as high as 316 ℃.
mechanical properties
PEEK (polyetheretherketone) plastic raw material resin has good toughness and rigidity, and it has excellent fatigue resistance to alternating stress comparable to alloy materials.
smoking
standard for measuring smoke and dust produced by plastic combustion isASTM E662, this standard uses the soot laboratory of the National Bureau of Standards (NBS) to measure the visible light dimness of soot produced by the combustion of standard shape samples in specific optical density. This test can be used in continuous combustion (With flame) or combustion interruption (no flame), PEEK has the lowest smoke properties in plastics.
gas emission
PEEK is the same as many organic materials. When PEEK is decomposed at high temperature, PEEK mainly produces carbon dioxide and carbon monoxide. Using the British aircraft test standard BSS 7239, extremely low concentration of poisonous gas can be detected. This detection process requires complete combustion of 100 grams of samples in a space of 1 cubic meter, and then analysis of the poisonous gas generated therein, toxicity index is defined as the ratio of the concentration of toxic gas produced under normal conditions to the dose that can be fatal to a person in 30 minutes. The PEEK450G index is 0.22, and no acid gas is detected.
stability
PEEK plastic raw materials have superior dimensional stability, which is very important for some applications. Changes in environmental conditions such as temperature and humidity have little effect on the size of PEEK parts, and can meet the requirements of use under conditions with relatively high dimensional accuracy requirements.
1.PEEK plastic raw material injection molding shrinkage rate is small, which is very beneficial to control the dimensional tolerance range of PEEK injection molding parts, so that the dimensional accuracy of PEEK parts is much higher than that of general plastic;
2. The coefficient of thermal expansion is small. With the change of temperature (which can be caused by the change of ambient temperature or friction heat generation during operation), the size change of PEEK parts is small;
3.PEEK has outstanding heat-resistant hydrolysis characteristics, and its water absorption is very low in high temperature and high humidity environment. There will be no obvious change in size of general-purpose plastics such as nylon due to water absorption;
insulation stability
PEEK (polyetheretherketone) plastic raw material resin has good electrical insulation properties and is maintained to a very high temperature range. Its dielectric loss is also small at high frequencies.
Irradiation resistance and peel resistance
PEEK (polyetheretherketone) plastic raw material resin has good radiation resistance and peeling resistance, so it can be used to make electromagnetic wires for special purposes. At present, peek is sometimes used in disinfection cabinets and wireless verification systems, which is quite stainless steel.

PEEK plastic raw materials:

is currently used in disinfection cabinets and wireless verification systems, sometimespeek is quite stainless steel.
polyether ether ketone resin (Polyether Ether Ketone, referred to as PEEK resin) is a new semi-crystalline aromatic thermoplastic prepared by the condensation reaction of 4,4 '-difluorobenzophenone and hydroquinone in the presence of alkali metal carbonate with diphenyl sulfone as a solvent. It is a high temperature resistant thermoplastic with high glass transition temperature (143 ℃) and melting point (343 ℃ ), and the load thermal deformation temperature is as high as 316 ℃( 30% glass fiber or carbon fiber reinforced grade). It can be used for a long time at 250 ℃. Compared with other high temperature resistant plastics such as PI, PPS, PTFE, PPO, etc., the upper limit of the use temperature is nearly 50 ℃ higher; PEEK resin not only has better heat resistance than other high temperature resistant plastics, but also has high strength, high modulus, high fracture toughness and excellent dimensional stability. PEEK resin can maintain high strength at high temperature, its bending strength at 200 ℃ is about 24MPa, and its bending strength and compressive strength are still 12 ~ 13MPa at 250 ℃. PEEK resin has higher rigidity and better dimensional stability, the linear expansion coefficient is small, very close to the metal aluminum material; it has excellent chemical resistance. Among the usual chemicals, only concentrated sulfuric acid can dissolve or destroy it. Its corrosion resistance is similar to that of nickel steel. At the same time, it has its own flame retardancy, releases less smoke and toxic gases under flame conditions, and has strong radiation resistance; PEEK resin has good toughness, the excellent fatigue resistance to alternating stress is the most outstanding of all plastics, which is comparable to alloy materials; PEEK resin has outstanding tribological characteristics, excellent sliding wear resistance and fretting wear resistance, especially at 250 ℃ Maintain high wear resistance and low friction coefficient; PEEK resin is easy to extrude and injection molding, with excellent processing performance and high molding efficiency. In addition, PEEK also has good self-lubrication, easy processing, stable insulation, hydrolysis resistance and other excellent properties, making it in aerospace, automotive manufacturing, electrical and electronic, medical and food processing and other fields have a wide range of applications, development and utilization prospects are very broad.