PEEK 化学特性,用途語,生産方法
応用
その卓越した特性によりPEEKはさまざまな高性能アプリケーションで利用されています例えば航空宇宙産業では重量の軽減が求められる部品や高温・高圧下での使用が必要な部品に使用されます自動車産業では耐熱性や化学的耐性が必要なエンジン部品や電子部品の製造に用いられていますまた医療分野では生体適合性が高く耐熱性や化学的耐性が求められる医療機器やインプラントの材料として重宝されています
展望
PEEKの市場は今後も拡大していくことが予想されます特に電気自動車の普及や再生可能エネルギー分野での新しい応用が期待されておりこれらの分野では耐熱性や化学的耐性機械的強度といったPEEKの特性が非常に重要になりますさらに医療分野においてもPEEKを用いた新しいインプラントや医療機器の開発が進んでおりその需要は増加する一方です
化学的特性
ポリエーテルエーテルケトンPEEKは高性能な熱可塑性ポリマーの一種でありその卓越した耐熱性耐化学薬品性および機械的強度から航空宇宙自動車医療などの分野で広く使用されていますPEEKは特に厳しい環境条件下でのアプリケーションに適しています
化学的特性
Polyetheretherketone is a strong rigid material with outstanding heat resistance.
It withstands long periods at 250°C with little change in mechanical
properties and can be used up to 315°C. This level of heat resistance is the
highest of current commercial melt-processable thermoplastics. The polymer
also has excellent electrical insulation characteristics. Polyetheretherketone is
resistant to all organic solvents although a few can cause environmental
stress-cracking. The material is soluble in concentrated sulphuric acid. Polyetheretherketone
can be injection moulded and extruded on conventional
equipment and can be used to prepare glass-fibre and carbon-fibre composites.
Applications include coatings for high performance wiring used in the
aeronautics and nuclear fields and advanced structural composites.
使用
PEEK can be sulfonated and coated on nanofiltration(NF) membranes which can be used in the fabrication of antifouling based NF membranes. Sulfonated PEEK (up to 50-70 degree of sulfonation(DS)) can be used in the formation of proton exchange membranes(PEMs) for fuel cells based applications.
製造方法
Polyaryletherketones may be prepared by methods which are analogous to
those used for polysulphones, namely polyetherification and polyacylation.
Polyetherification occurs when fluorinated aromatic ketones react with
phenates, as illustrated by the following reactions:
主な応用
Polyetheretherketone (CAS 29658-26-2), abbreviated as PEEK, is a polyaromatic semi-crystalline thermoplastic polymer characterised by high resilience and high strength, with a modulus of elasticity of 3.7–4.0 GPa. It is a tooth-coloured material, making it aesthetically appealing. PEEK has been successfully used as a restorative material and in the manufacture of dental implants. However, unmodified PEEK is biologically inert and hydrophobic, allowing neither protein adsorption nor promoting cell adhesion. Bonding and hydrophilicity can be improved through the use of fillers or surface treatments (such as sulphuric acid etching), enabling its widespread application in oral implantology, prosthodontics, orthodontics and the restoration of dental defects. Furthermore, due to its radiopacity, chemical stability and excellent resistance to high-temperature sterilisation, PEEK has been widely used in spinal fusion and craniofacial defect repair, amongst other applications, and can be used in additive manufacturing to produce customised, patient-specific implants. PEEK can also be blended with hydrophilic polymers (such as poly(glycolic acid) and poly(vinyl alcohol)) to produce biodegradable scaffolds for bone tissue engineering [1–3].
化学構造
PEEKの化学式は[C19H12O3]nでエーテル結合とケトン結合を持つ芳香族ポリマーですこの構造がPEEKに高い熱安定性と化学的耐性を与え極めて厳しい環境下でもその性質を維持することができます
安全性
PEEKは加工性に優れており射出成形押出成形CNC加工など様々な方法で製品に加工することが可能ですこれにより複雑な形状や精密な部品を製造する際にもPEEKが選ばれる理由となっています加えてPEEKは再利用可能であり環境に与える影響を最小限に抑えることができます
一般的な説明
Poly(oxy-1,4-phenyleneoxy-1,4-phenylenecarbonyl-1,4-phenylene)(PEEK) is a semi-crystalline polymer with good thermo-mechanical properties and high chemical resistance which can be used as engineering plastics.
化学性质
高い熱安定性PEEKは連続使用温度が260°Cまで耐えることができ一部のグレードではそれ以上の温度に耐えることが報告されています優れた機械的強度PEEKは高い引張強度と剛性を備えており重い負荷や高衝撃の状況下でも性能を保ちます耐化学薬品性多くの有機溶剤酸および塩基に対して高い耐性を示します良好な摩耗耐性摩擦や摩耗に強く長期間の使用に適しています
工業用途
PEEK can be injection-molded, compression- molded, or extruded into stock shapes, which are typically machined to final-part dimensions. Most pump components can be injection-molded as long as they do not require tight tolerances. The strict tolerances required for bushings and wear rings require parts to be machined from molded tube stock.
Replacing bronze and steel wear rings with carbon-filled or carbon-reinforced PEEK components, allows manufacturers to increase pump efficiency by achieving tighter clearances. PEEK resins also reduce vibrations caused by fluid flow across wear rings and excess rotor runout. The ductility of plastic pump components helps them outperform metal versions when it comes to reducing vibration, as well as resisting impact.
PEEK 上流と下流の製品情報
原材料
準備製品