Polyetheretherketone thermoplastics

A new development in high-pressure NMR probe design is a multipurpose high-pressure autoclave made from the thermoplastic polyetheretherketone (PEEK) (67). This NMR autoclave was used for in situ NMR imaging of a compressed gas system, namely, the exchange of methanol for liquid CO2 in nanoporous silica-alcogels, reported for the first time. 

APC-2 = a polyetheretherketone, thermoplastic polymer matrix from ICl Fiberite,... 

Fig. 6.9. Normalized fracture toughness, (Kc - AKQ)/K. of short glass fiber-thermoplastics injection molded composites as a function of reinforcing effectiveness parameter, ft (O) polyetheretherketone (PEEK) matrix (K = 6.5 MPa m) (A) polytetrafluoroethylene (PTFE) matrix (K = 1.9 MPaym).

The model PBZT/ABPBI molecular composite system is limited since the rod and the matrix do not possess glass transition temperatures for subsequent post form consolidation. In an effort to improve the processability for molecular composites, thermoplastics were used as the host matrix. Processing from acidic solvents requires the thermoplastic host to be soluble and stable in meth-anesulfonic add. Thermoplastic matrices were investigated including both amorphous and semicrystalline nylons [71,72], polyphenylquinoxaline (PPQ) [73] and polyetheretherketone (PEEK) [74], Table 5 shows the mechanical properties obtained for various processed PBZT thermoplastic molecular composite systems. As an example, the PBZT/Nylon systems showed 50-300% improvement over uniaxially aligned chopped fiber composite of comparable compositions. However, the thermally-induced phase separation during consol-... 

Engineering thermoplastics have also been used in preimpregnated constructions. The thermoplastic is thoroughly dispersed as a continuous phase in glass, other resins, carbon fibers (qv), or other reinforcement. Articles can be produced from these constructions using thermoforming techniques. For example, the aerospace industry uses polyetheretherketone (PEEK) in woven carbon-fiber tapes (26). Experimental uses of other composite constructions have been reported (27) (see also COMPOSITE MATERIALS, POLYMER-MATRIX). 

Thermoplastic matrix composites are generally employed where high-volume and economic considerations exist such as in the automotive and decorative paneling industries. Thermoplastic resin-based composites range from high-priced polyimide, polyethersul-fone, and polyetheretherketone to the more affordable nylon, acetal, and polycarbonate resins. Practically all thermoplastics are available in glass-reinforced grades. 

The most widespread polymer currently in use for high-speed dynamic sealing applications in automotives is polyetheretherketone. These thermoplastic aromatic polymers are used in the aerospace, electronics, and nuclear industries [9], These materials have excellent mechanical- and chemical-resistance properties, which permit polyethere-therketones to be used in many engineering applications—often in harsh environments [10], These polyetheretherketones are the product of the reaction of 1,4-dihydroxyben-zene and 4,4 -di II non then /ophenonc [8]. Figure 6.5 shows this reaction. 

Spedalty plastics snch as PC, acrylonitrile-butadiene-styrene (ABS), PU, polyamides (PA), thermoplastic elastomers, polysnlfone and polyetheretherketone (PEEK) are being used in a nnmber of special applications in medical devices, whenever high performance is required. There are also a number of polymer blends used in this category (i.e., PC/ABS and PC/polyester), if property envelopes are required to be further improved. 

As shown in Table 12.2, thermoplastic matrices such as polyethersulphone (PES) and polyetheretherketone (PEEK) absorb much less moisture than the advanced epoxies. PEEK is an example of a partially crystalline linear polymer with very low moisture absorption. Thermoplastics which are relatively nonpolar and absorb low... 

Amorphous PEEK (polyetheretherketone) thermoplastic resins had much lower water uptakes and the ATg was limited to just 2°C. The more usual semi-crystalline PEEK, that is, the form commercially available, has an even greater resistance to water absorption and therefore an even greater stability in wet conditions, but it suffers from a high cost disadvantage. 

Neopentyl glycol diglycidyl ether Nickel sulfate Nonoxynol-1 Nonoxynol-3 Nylon 66 Octoxynol-13 PEI-15 PEI-30 PEI-45 PEI-1750 Pentaerythrityl tetrastearate 1,3-Pentanediamine Phenolic resin Phenoxy resin 1,2-Polybutadiene Polybutene Polyetheretherketone Polyethylene imine Polyimide, thermoplastic Polyquaternium-16... 

Polyetheretherketone thermoplastic, engineering automotive components Polyphenylene ether thermoplastic, engineering aviation Polyarylsulfone resin... 

The family of PKs, also called polyaryletherketones (PAEKs), consists of polyetheretherketone (PEEK), polyetheretherketone-ketone (PEEKK), polyetherketone (PEK), and polyetherketone-etherketone-ketone (PEKEKK). They share similar molecular structures based upon repeating ether and ketone groups in various ratios. Cost of the resins is high but, in RPs with high-performance fibers, there are many appfications in the aerospace and defense industries, electrical and atomic installations, and industrial and electronics products. Compoimds for injection molding are available, but the major area of apphcation is with thermoplastic prepreg materials, using mats, fabrics and/or continuous fiber. 

Polyetherketone n. An advanced thermoplastic resin having both ether and ketone linkages in its chains, a close relative of polyetheretherketone, above, and having the peek structure with the leftmost phenyl and ether oxygen deleted. This melt-processable polymer melts near 365°C, is... 

Polyether sulfone, polycarbonate (glass), nylon (glass), polypropylene (glass), thermoplastic polyester, polyetherimide, vinyl ester, polyetheretherketone, epoxy, pol5dmide... 

Polyethylene, silicone, PVC, thermoplastic elastomer, polyurethane, ethylene vinyl acetate Epoxy, nylon (glass or carbon fiber), polyurethane, thermoplastic polyester (glass), polyphthalamide, polyetheretherketone, polycarbonate (carbon fiber), polyetherimide, polyether-sulfone Nylon (glass or carbon fiber), polyurethane, thermoplastic polyester (glass), polyetheretherketone, polyetherimide, polyphthalamide, polyphenylene sulfide (glass or carbon fiber)... 

Fluorocarbons, phenolic (glass), polyphthalamide, polyimide thermoplastic polyester (glass), melamine, epoxy, nylon (glass or carbon fiber), polyetheretherketone, polysulfone, polyphenylene sulfide... 

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